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jbe/bsw@0
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1 #include <lua.h>
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jbe/bsw@0
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2 #include <lauxlib.h>
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jbe/bsw@0
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3 #include <libpq-fe.h>
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jbe/bsw@0
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4 #include <postgres.h>
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jbe/bsw@0
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5 #include <catalog/pg_type.h>
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jbe/bsw@0
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6 #include <stdint.h>
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jbe@393
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7 #include <time.h>
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jbe/bsw@0
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8
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jbe@23
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9 // NOTE: Comments with format "// <number>" denote the Lua stack position
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jbe@23
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10
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jbe@23
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11 // prefix for all Lua registry entries of this library:
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jbe@23
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12 #define MONDELEFANT_REGKEY "e449ba8d9a53d353_mondelefant_"
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jbe/bsw@0
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13
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jbe@23
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14 // registry key of module "mondelefant_native":
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jbe@23
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15 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
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jbe@23
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16 // registry key of meta-table for database connections:
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jbe@23
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17 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
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jbe@23
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18 // registry key of meta-table for database result lists and objects:
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jbe@23
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19 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
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jbe@23
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20 // registry key of meta-table for database error objects:
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jbe@23
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21 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
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jbe@23
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22 // registry key of meta-table for models (named classes here):
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jbe@23
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23 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
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jbe@23
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24 // registry key of default prototype for models/classes:
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jbe@23
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25 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
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jbe/bsw@0
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26
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jbe@23
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27 // C-structure for database connection userdata:
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jbe/bsw@0
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28 typedef struct {
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jbe/bsw@0
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29 PGconn *pgconn;
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jbe/bsw@0
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30 int server_encoding;
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jbe/bsw@0
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31 } mondelefant_conn_t;
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jbe@23
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32 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
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jbe@23
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33 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
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jbe/bsw@0
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34
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jbe@23
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35 // transform codepoint-position to byte-position for a given UTF-8 string:
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jbe/bsw@0
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36 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
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jbe/bsw@0
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37 size_t bytepos;
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jbe/bsw@0
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38 for (bytepos = 0; utf8pos > 0; bytepos++) {
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jbe/bsw@0
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39 uint8_t c;
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jbe/bsw@0
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40 c = ((const uint8_t *)str)[bytepos];
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jbe/bsw@0
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41 if (!c) break;
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jbe/bsw@0
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42 if (c <= 0x7f || c >= 0xc0) utf8pos--;
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jbe/bsw@0
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43 }
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jbe/bsw@0
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44 return bytepos;
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jbe/bsw@0
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45 }
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jbe/bsw@0
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46
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jbe@23
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47 // PostgreSQL's OID for binary data type (bytea):
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jbe/bsw@0
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48 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
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jbe/bsw@0
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49
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jbe@23
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50 // mapping a PostgreSQL type given by its OID to a string identifier:
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jbe/bsw@0
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51 static const char *mondelefant_oid_to_typestr(Oid oid) {
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jbe/bsw@0
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52 switch (oid) {
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jbe/bsw@0
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53 case 16: return "bool";
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jbe/bsw@0
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54 case 17: return "bytea";
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jbe/bsw@0
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55 case 18: return "char";
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jbe/bsw@0
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56 case 19: return "name";
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jbe/bsw@0
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57 case 20: return "int8";
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jbe/bsw@0
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58 case 21: return "int2";
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jbe/bsw@0
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59 case 23: return "int4";
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jbe/bsw@0
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60 case 25: return "text";
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jbe/bsw@0
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61 case 26: return "oid";
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jbe/bsw@0
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62 case 27: return "tid";
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jbe/bsw@0
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63 case 28: return "xid";
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jbe/bsw@0
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64 case 29: return "cid";
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jbe@176
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65 case 114: return "json";
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jbe/bsw@0
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66 case 600: return "point";
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jbe/bsw@0
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67 case 601: return "lseg";
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jbe/bsw@0
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68 case 602: return "path";
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jbe/bsw@0
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69 case 603: return "box";
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jbe/bsw@0
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70 case 604: return "polygon";
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jbe/bsw@0
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71 case 628: return "line";
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jbe/bsw@0
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72 case 700: return "float4";
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jbe/bsw@0
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73 case 701: return "float8";
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jbe/bsw@0
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74 case 705: return "unknown";
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jbe/bsw@0
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75 case 718: return "circle";
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jbe/bsw@0
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76 case 790: return "money";
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jbe/bsw@0
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77 case 829: return "macaddr";
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jbe/bsw@0
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78 case 869: return "inet";
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jbe/bsw@0
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79 case 650: return "cidr";
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jbe/bsw@0
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80 case 1042: return "bpchar";
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jbe/bsw@0
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81 case 1043: return "varchar";
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jbe/bsw@0
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82 case 1082: return "date";
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jbe/bsw@0
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83 case 1083: return "time";
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jbe/bsw@0
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84 case 1114: return "timestamp";
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jbe/bsw@0
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85 case 1184: return "timestamptz";
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jbe/bsw@0
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86 case 1186: return "interval";
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jbe/bsw@0
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87 case 1266: return "timetz";
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jbe/bsw@0
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88 case 1560: return "bit";
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jbe/bsw@0
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89 case 1562: return "varbit";
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jbe/bsw@0
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90 case 1700: return "numeric";
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jbe@176
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91 case 3802: return "jsonb";
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jbe/bsw@0
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92 default: return NULL;
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jbe/bsw@0
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93 }
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jbe/bsw@0
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94 }
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jbe/bsw@0
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95
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jbe@23
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96 // This library maps PostgreSQL's error codes to CamelCase string
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jbe@23
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97 // identifiers, which consist of CamelCase identifiers and are seperated
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jbe@23
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98 // by dots (".") (no leading or trailing dots).
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jbe@23
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99 // There are additional error identifiers which do not have a corresponding
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jbe@23
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100 // PostgreSQL error associated with it.
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jbe@23
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101
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jbe@23
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102 // matching start of local variable 'pgcode' against string 'incode',
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jbe@23
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103 // returning string 'outcode' on match:
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jbe/bsw@0
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104 #define mondelefant_errcode_item(incode, outcode) \
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jbe/bsw@0
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105 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
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jbe/bsw@0
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106
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jbe@23
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107 // additional error identifiers without corresponding PostgreSQL error:
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jbe/bsw@0
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108 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
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jbe/bsw@0
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109 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
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jbe/bsw@0
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110 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
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jbe/bsw@0
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111 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
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jbe/bsw@0
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112 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
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jbe/bsw@0
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113 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
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jbe/bsw@0
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114
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jbe@23
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115 // mapping PostgreSQL error code to error code as returned by this library:
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jbe/bsw@0
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116 static const char *mondelefant_translate_errcode(const char *pgcode) {
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jbe/bsw@0
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117 if (!pgcode) abort(); // should not happen
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jbe/bsw@0
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118 mondelefant_errcode_item("02", "NoData")
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jbe/bsw@0
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119 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
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jbe/bsw@0
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120 mondelefant_errcode_item("08", "ConnectionException")
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jbe/bsw@0
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121 mondelefant_errcode_item("09", "TriggeredActionException")
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jbe/bsw@0
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122 mondelefant_errcode_item("0A", "FeatureNotSupported")
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jbe/bsw@0
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123 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
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jbe/bsw@0
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124 mondelefant_errcode_item("0F", "LocatorException")
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jbe/bsw@0
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125 mondelefant_errcode_item("0L", "InvalidGrantor")
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jbe/bsw@0
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126 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
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jbe/bsw@0
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127 mondelefant_errcode_item("21", "CardinalityViolation")
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jbe/bsw@0
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128 mondelefant_errcode_item("22", "DataException")
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jbe/bsw@0
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129 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
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jbe/bsw@0
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130 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
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jbe/bsw@0
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131 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
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jbe/bsw@0
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132 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
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jbe/bsw@0
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133 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
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jbe/bsw@0
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134 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
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jbe/bsw@0
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135 mondelefant_errcode_item("24", "InvalidCursorState")
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jbe/bsw@0
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136 mondelefant_errcode_item("25", "InvalidTransactionState")
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jbe/bsw@0
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137 mondelefant_errcode_item("26", "InvalidSqlStatementName")
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jbe/bsw@0
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138 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
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jbe/bsw@0
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139 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
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jbe/bsw@0
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140 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
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jbe/bsw@0
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141 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
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jbe/bsw@0
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142 mondelefant_errcode_item("2F", "SqlRoutineException")
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jbe/bsw@0
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143 mondelefant_errcode_item("34", "InvalidCursorName")
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jbe/bsw@0
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144 mondelefant_errcode_item("38", "ExternalRoutineException")
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jbe/bsw@0
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145 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
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jbe/bsw@0
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146 mondelefant_errcode_item("3B", "SavepointException")
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jbe/bsw@0
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147 mondelefant_errcode_item("3D", "InvalidCatalogName")
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jbe/bsw@0
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148 mondelefant_errcode_item("3F", "InvalidSchemaName")
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jbe/bsw@0
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149 mondelefant_errcode_item("40", "TransactionRollback")
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jbe/bsw@0
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150 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
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jbe/bsw@0
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151 mondelefant_errcode_item("44", "WithCheckOptionViolation")
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jbe/bsw@0
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152 mondelefant_errcode_item("53", "InsufficientResources")
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jbe/bsw@0
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153 mondelefant_errcode_item("54", "ProgramLimitExceeded")
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jbe/bsw@0
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154 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
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jbe/bsw@0
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155 mondelefant_errcode_item("57", "OperatorIntervention")
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jbe/bsw@0
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156 mondelefant_errcode_item("58", "SystemError")
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jbe/bsw@0
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157 mondelefant_errcode_item("F0", "ConfigurationFileError")
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jbe/bsw@0
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158 mondelefant_errcode_item("P0", "PlpgsqlError")
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jbe/bsw@0
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159 mondelefant_errcode_item("XX", "InternalError")
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jbe/bsw@0
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160 return "unknown";
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jbe/bsw@0
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161 }
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jbe/bsw@0
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162
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jbe@23
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163 // C-function, checking if a given error code (as defined by this library)
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jbe@23
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164 // is belonging to a certain class of errors (strings are equal or error
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jbe@23
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165 // code begins with error class followed by a dot):
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jbe/bsw@0
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166 static int mondelefant_check_error_class(
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jbe/bsw@0
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167 const char *errcode, const char *errclass
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jbe/bsw@0
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168 ) {
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jbe/bsw@0
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169 size_t i = 0;
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jbe/bsw@0
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170 while (1) {
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jbe/bsw@0
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171 if (errclass[i] == 0) {
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jbe/bsw@0
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172 if (errcode[i] == 0 || errcode[i] == '.') return 1;
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jbe/bsw@0
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173 else return 0;
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jbe/bsw@0
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174 }
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jbe/bsw@0
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175 if (errcode[i] != errclass[i]) return 0;
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jbe/bsw@0
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176 i++;
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jbe/bsw@0
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177 }
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jbe/bsw@0
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178 }
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jbe/bsw@0
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179
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jbe@23
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180 // pushing first line of a string on Lua's stack (without trailing CR/LF):
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jbe/bsw@0
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181 static void mondelefant_push_first_line(lua_State *L, const char *str) {
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jbe/bsw@0
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182 size_t i = 0;
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jbe/bsw@0
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183 if (!str) abort(); // should not happen
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jbe/bsw@0
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184 while (1) {
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jbe@397
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185 char c = str[i];
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jbe@397
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186 if (c == '\n' || c == '\r' || c == 0) {
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jbe@397
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187 lua_pushlstring(L, str, i);
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jbe@397
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188 return;
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jbe@397
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189 }
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jbe/bsw@0
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190 i++;
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jbe@397
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191 }
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jbe/bsw@0
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192 }
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jbe/bsw@0
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193
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jbe@23
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194 // "connect" function of library, which establishes a database connection
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jbe@23
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195 // and returns a database connection handle:
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jbe/bsw@0
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196 static int mondelefant_connect(lua_State *L) {
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jbe@23
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197 luaL_Buffer buf; // Lua string buffer to create 'conninfo' (see below)
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jbe@23
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198 const char *conninfo; // string for PQconnectdb function
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jbe@23
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199 PGconn *pgconn; // PGconn object as returned by PQconnectdb function
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jbe@23
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200 mondelefant_conn_t *conn; // C-structure for userdata
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jbe@397
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201 // expect a table as first argument:
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jbe@397
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202 luaL_checktype(L, 1, LUA_TTABLE);
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jbe@23
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203 // if engine is anything but "postgresql", then raise error:
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jbe/bsw@0
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204 lua_settop(L, 1);
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jbe/bsw@0
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205 lua_getfield(L, 1, "engine"); // 2
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jbe/bsw@0
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206 if (!lua_toboolean(L, 2)) {
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jbe@397
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207 return luaL_argerror(L, 1, "no database engine selected");
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jbe/bsw@0
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208 }
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jbe/bsw@0
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209 lua_pushliteral(L, "postgresql"); // 3
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jbe/bsw@0
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210 if (!lua_rawequal(L, 2, 3)) {
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jbe@397
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211 return luaL_argerror(L, 1,
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jbe@397
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212 "only database engine 'postgresql' is supported"
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jbe/bsw@0
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213 );
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jbe/bsw@0
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214 }
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jbe@40
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215 // copy conninfo string for PQconnectdb function from argument table to
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jbe@40
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216 // stack position 2:
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jbe/bsw@0
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217 lua_settop(L, 1);
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jbe@40
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218 lua_getfield(L, 1, "conninfo"); // 2
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jbe@40
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219 // if no conninfo string was found, then assemble one from the named
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jbe@40
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220 // options except "engine" option:
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jbe@40
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221 if (!lua_toboolean(L, 2)) {
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jbe@40
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222 lua_settop(L, 1);
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jbe@40
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223 lua_pushnil(L); // slot for key at stack position 2
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jbe@40
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224 lua_pushnil(L); // slot for value at stack position 3
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jbe@40
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225 luaL_buffinit(L, &buf);
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jbe@40
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226 {
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jbe@40
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227 int need_seperator = 0;
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jbe@40
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228 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
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jbe@40
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229 lua_replace(L, 3);
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jbe@40
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230 lua_replace(L, 2);
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jbe@40
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231 // NOTE: numbers will be converted to strings automatically here,
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jbe@40
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232 // but perhaps this will change in future versions of lua
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jbe@40
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233 luaL_argcheck(L,
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jbe@397
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234 lua_isstring(L, 2) && lua_isstring(L, 3), 1, "key is not a string"
|
jbe@40
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235 );
|
jbe@40
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236 lua_pushvalue(L, 2);
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jbe@40
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237 lua_pushliteral(L, "engine");
|
jbe@40
|
238 if (!lua_rawequal(L, -2, -1)) {
|
jbe@40
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239 const char *value;
|
jbe@40
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240 size_t value_len;
|
jbe@40
|
241 size_t value_pos = 0;
|
jbe@40
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242 lua_pop(L, 1);
|
jbe@40
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243 if (need_seperator) luaL_addchar(&buf, ' ');
|
jbe@40
|
244 luaL_addvalue(&buf);
|
jbe@40
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245 luaL_addchar(&buf, '=');
|
jbe@40
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246 luaL_addchar(&buf, '\'');
|
jbe@40
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247 value = lua_tolstring(L, 3, &value_len);
|
jbe@40
|
248 do {
|
jbe@40
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249 char c;
|
jbe@40
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250 c = value[value_pos++];
|
jbe@40
|
251 if (c == '\'') luaL_addchar(&buf, '\\');
|
jbe@40
|
252 luaL_addchar(&buf, c);
|
jbe@40
|
253 } while (value_pos < value_len);
|
jbe@40
|
254 luaL_addchar(&buf, '\'');
|
jbe@40
|
255 need_seperator = 1;
|
jbe@40
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256 } else {
|
jbe@40
|
257 lua_pop(L, 1);
|
jbe@40
|
258 }
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jbe/bsw@0
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259 }
|
jbe/bsw@0
|
260 }
|
jbe@40
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261 luaL_pushresult(&buf);
|
jbe@40
|
262 lua_replace(L, 2);
|
jbe@40
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263 lua_settop(L, 2);
|
jbe/bsw@0
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264 }
|
jbe@40
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265 // use conninfo string on stack position 2:
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jbe/bsw@0
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266 conninfo = lua_tostring(L, 2);
|
jbe@23
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267 // call PQconnectdb function of libpq:
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jbe/bsw@0
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268 pgconn = PQconnectdb(conninfo);
|
jbe@397
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269 // throw or return errors, if neccessary:
|
jbe/bsw@0
|
270 if (!pgconn) {
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jbe/bsw@0
|
271 return luaL_error(L,
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jbe/bsw@0
|
272 "Error in libpq while creating 'PGconn' structure."
|
jbe/bsw@0
|
273 );
|
jbe/bsw@0
|
274 }
|
jbe/bsw@0
|
275 if (PQstatus(pgconn) != CONNECTION_OK) {
|
jbe@397
|
276 lua_pushnil(L); // 3
|
jbe@397
|
277 mondelefant_push_first_line(L, PQerrorMessage(pgconn)); // 4
|
jbe@397
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278 lua_newtable(L); // 5
|
jbe@397
|
279 lua_getfield(L,
|
jbe@397
|
280 LUA_REGISTRYINDEX,
|
jbe@397
|
281 MONDELEFANT_ERROROBJECT_MT_REGKEY
|
jbe@397
|
282 );
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jbe@397
|
283 lua_setmetatable(L, 5);
|
jbe/bsw@0
|
284 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe@397
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285 lua_setfield(L, 5, "code");
|
jbe@397
|
286 lua_pushvalue(L, 4);
|
jbe@397
|
287 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
288 PQfinish(pgconn);
|
jbe/bsw@0
|
289 return 3;
|
jbe/bsw@0
|
290 }
|
jbe@23
|
291 // create userdata:
|
jbe/bsw@0
|
292 lua_settop(L, 0);
|
jbe/bsw@0
|
293 conn = lua_newuserdata(L, sizeof(*conn)); // 1
|
jbe@23
|
294 // set 'pgconn' in C-struct of userdata:
|
jbe/bsw@0
|
295 conn->pgconn = pgconn;
|
jbe@23
|
296 // set 'server_encoding' in C-struct of userdata:
|
jbe/bsw@0
|
297 {
|
jbe/bsw@0
|
298 const char *charset;
|
jbe/bsw@0
|
299 charset = PQparameterStatus(pgconn, "server_encoding");
|
jbe/bsw@0
|
300 if (charset && !strcmp(charset, "UTF8")) {
|
jbe/bsw@0
|
301 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
|
jbe/bsw@0
|
302 } else {
|
jbe/bsw@0
|
303 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
|
jbe/bsw@0
|
304 }
|
jbe/bsw@0
|
305 }
|
jbe@23
|
306 // set meta-table of userdata:
|
jbe/bsw@0
|
307 luaL_getmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
|
jbe/bsw@0
|
308 lua_setmetatable(L, 1);
|
jbe@396
|
309 // create and associate userdata table:
|
jbe@396
|
310 lua_newtable(L);
|
jbe@396
|
311 lua_setuservalue(L, 1);
|
jbe@396
|
312 // store key "fd" with file descriptor of connection:
|
jbe@396
|
313 lua_pushinteger(L, PQsocket(pgconn));
|
jbe@396
|
314 lua_setfield(L, 1, "fd");
|
jbe@23
|
315 // store key "engine" with value "postgresql" as connection specific data:
|
jbe/bsw@0
|
316 lua_pushliteral(L, "postgresql");
|
jbe/bsw@0
|
317 lua_setfield(L, 1, "engine");
|
jbe@23
|
318 // return userdata:
|
jbe/bsw@0
|
319 return 1;
|
jbe/bsw@0
|
320 }
|
jbe/bsw@0
|
321
|
jbe@23
|
322 // returns pointer to libpq handle 'pgconn' of userdata at given index
|
jbe@23
|
323 // (or throws error, if database connection has been closed):
|
jbe/bsw@0
|
324 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
|
jbe/bsw@0
|
325 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
326 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
|
jbe/bsw@0
|
327 if (!conn->pgconn) {
|
jbe/bsw@0
|
328 luaL_error(L, "PostgreSQL connection has been closed.");
|
jbe/bsw@0
|
329 return NULL;
|
jbe/bsw@0
|
330 }
|
jbe/bsw@0
|
331 return conn;
|
jbe/bsw@0
|
332 }
|
jbe/bsw@0
|
333
|
jbe@23
|
334 // meta-method "__index" of database handles (userdata):
|
jbe/bsw@0
|
335 static int mondelefant_conn_index(lua_State *L) {
|
jbe@23
|
336 // try table for connection specific data:
|
jbe/bsw@0
|
337 lua_settop(L, 2);
|
jbe@396
|
338 lua_getuservalue(L, 1); // 3
|
jbe/bsw@0
|
339 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
340 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
341 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
342 // try to use prototype stored in connection specific data:
|
jbe/bsw@0
|
343 lua_settop(L, 3);
|
jbe/bsw@0
|
344 lua_getfield(L, 3, "prototype"); // 4
|
jbe/bsw@0
|
345 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
346 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
347 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
348 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
349 }
|
jbe@23
|
350 // try to use "postgresql_connection_prototype" of library:
|
jbe/bsw@0
|
351 lua_settop(L, 2);
|
jbe/bsw@0
|
352 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
|
jbe/bsw@0
|
353 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
|
jbe/bsw@0
|
354 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
355 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
356 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
357 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
358 }
|
jbe@23
|
359 // try to use "connection_prototype" of library:
|
jbe/bsw@0
|
360 lua_settop(L, 3);
|
jbe/bsw@0
|
361 lua_getfield(L, 3, "connection_prototype"); // 4
|
jbe/bsw@0
|
362 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
363 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
364 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
365 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
366 }
|
jbe@23
|
367 // give up and return nothing:
|
jbe/bsw@0
|
368 return 0;
|
jbe/bsw@0
|
369 }
|
jbe/bsw@0
|
370
|
jbe@23
|
371 // meta-method "__newindex" of database handles (userdata):
|
jbe/bsw@0
|
372 static int mondelefant_conn_newindex(lua_State *L) {
|
jbe@23
|
373 // store key-value pair in table for connection specific data:
|
jbe/bsw@0
|
374 lua_settop(L, 3);
|
jbe@396
|
375 lua_getuservalue(L, 1); // 4
|
jbe/bsw@0
|
376 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
377 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
378 lua_settable(L, 4);
|
jbe@23
|
379 // return nothing:
|
jbe/bsw@0
|
380 return 0;
|
jbe/bsw@0
|
381 }
|
jbe/bsw@0
|
382
|
jbe@23
|
383 // meta-method "__gc" of database handles:
|
jbe/bsw@0
|
384 static int mondelefant_conn_free(lua_State *L) {
|
jbe/bsw@0
|
385 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
386 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe/bsw@0
|
387 if (conn->pgconn) PQfinish(conn->pgconn);
|
jbe/bsw@0
|
388 conn->pgconn = NULL;
|
jbe/bsw@0
|
389 return 0;
|
jbe/bsw@0
|
390 }
|
jbe/bsw@0
|
391
|
jbe@23
|
392 // method "close" of database handles:
|
jbe/bsw@0
|
393 static int mondelefant_conn_close(lua_State *L) {
|
jbe/bsw@0
|
394 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
395 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
396 PQfinish(conn->pgconn);
|
jbe/bsw@0
|
397 conn->pgconn = NULL;
|
jbe@397
|
398 lua_pushnil(L);
|
jbe@396
|
399 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
|
jbe/bsw@0
|
400 return 0;
|
jbe/bsw@0
|
401 }
|
jbe/bsw@0
|
402
|
jbe@23
|
403 // method "is_okay" of database handles:
|
jbe/bsw@0
|
404 static int mondelefant_conn_is_ok(lua_State *L) {
|
jbe/bsw@0
|
405 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
406 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
407 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
|
jbe/bsw@0
|
408 return 1;
|
jbe/bsw@0
|
409 }
|
jbe/bsw@0
|
410
|
jbe@23
|
411 // method "get_transaction_status" of database handles:
|
jbe/bsw@0
|
412 static int mondelefant_conn_get_transaction_status(lua_State *L) {
|
jbe/bsw@0
|
413 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
414 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
415 switch (PQtransactionStatus(conn->pgconn)) {
|
jbe/bsw@0
|
416 case PQTRANS_IDLE:
|
jbe/bsw@0
|
417 lua_pushliteral(L, "idle");
|
jbe/bsw@0
|
418 break;
|
jbe/bsw@0
|
419 case PQTRANS_ACTIVE:
|
jbe/bsw@0
|
420 lua_pushliteral(L, "active");
|
jbe/bsw@0
|
421 break;
|
jbe/bsw@0
|
422 case PQTRANS_INTRANS:
|
jbe/bsw@0
|
423 lua_pushliteral(L, "intrans");
|
jbe/bsw@0
|
424 break;
|
jbe/bsw@0
|
425 case PQTRANS_INERROR:
|
jbe/bsw@0
|
426 lua_pushliteral(L, "inerror");
|
jbe/bsw@0
|
427 break;
|
jbe/bsw@0
|
428 default:
|
jbe/bsw@0
|
429 lua_pushliteral(L, "unknown");
|
jbe/bsw@0
|
430 }
|
jbe/bsw@0
|
431 return 1;
|
jbe/bsw@0
|
432 }
|
jbe/bsw@0
|
433
|
jbe@397
|
434 // method "try_wait" of database handles:
|
jbe@397
|
435 static int mondelefant_conn_try_wait(lua_State *L) {
|
jbe@393
|
436 mondelefant_conn_t *conn;
|
jbe@393
|
437 int infinite, nonblock = 0;
|
jbe@393
|
438 struct timespec wakeup;
|
jbe@393
|
439 int fd;
|
jbe@393
|
440 fd_set fds;
|
jbe@393
|
441 conn = mondelefant_get_conn(L, 1);
|
jbe@393
|
442 infinite = lua_isnoneornil(L, 2);
|
jbe@393
|
443 if (!infinite) {
|
jbe@393
|
444 lua_Number n;
|
jbe@393
|
445 int isnum;
|
jbe@393
|
446 n = lua_tonumberx(L, 2, &isnum);
|
jbe@393
|
447 if (isnum && n>0 && n<=86400*366) {
|
jbe@393
|
448 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
|
jbe@393
|
449 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
|
jbe@393
|
450 }
|
jbe@393
|
451 wakeup.tv_sec += n;
|
jbe@393
|
452 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
|
jbe@393
|
453 if (wakeup.tv_nsec >= 1000000000) {
|
jbe@393
|
454 wakeup.tv_sec += 1;
|
jbe@393
|
455 wakeup.tv_nsec -= 1000000000;
|
jbe@393
|
456 }
|
jbe@393
|
457 } else if (isnum && n==0) {
|
jbe@393
|
458 nonblock = 1;
|
jbe@393
|
459 } else {
|
jbe@393
|
460 luaL_argcheck(L, 0, 2, "not a valid timeout");
|
jbe@393
|
461 }
|
jbe@393
|
462 }
|
jbe@397
|
463 lua_settop(L, 1);
|
jbe@393
|
464 if (!nonblock) {
|
jbe@393
|
465 fd = PQsocket(conn->pgconn);
|
jbe@393
|
466 FD_ZERO(&fds);
|
jbe@393
|
467 FD_SET(fd, &fds);
|
jbe@393
|
468 }
|
jbe@393
|
469 while (true) {
|
jbe@393
|
470 {
|
jbe@393
|
471 PGnotify *notify;
|
jbe@393
|
472 if (!PQconsumeInput(conn->pgconn)) {
|
jbe@397
|
473 lua_newtable(L); // 2
|
jbe@397
|
474 lua_getfield(L,
|
jbe@397
|
475 LUA_REGISTRYINDEX,
|
jbe@397
|
476 MONDELEFANT_ERROROBJECT_MT_REGKEY
|
jbe@397
|
477 );
|
jbe@397
|
478 lua_setmetatable(L, 2);
|
jbe@397
|
479 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe@397
|
480 lua_setfield(L, 2, "code");
|
jbe@397
|
481 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
|
jbe@397
|
482 lua_setfield(L, 2, "message");
|
jbe@397
|
483 return 1;
|
jbe@393
|
484 }
|
jbe@393
|
485 notify = PQnotifies(conn->pgconn);
|
jbe@393
|
486 if (notify) {
|
jbe@397
|
487 lua_pushnil(L);
|
jbe@393
|
488 lua_pushstring(L, notify->relname);
|
jbe@393
|
489 lua_pushstring(L, notify->extra);
|
jbe@393
|
490 lua_pushinteger(L, notify->be_pid);
|
jbe@393
|
491 PQfreemem(notify);
|
jbe@397
|
492 return 4;
|
jbe@393
|
493 }
|
jbe@393
|
494 }
|
jbe@393
|
495 if (infinite) {
|
jbe@393
|
496 select(fd+1, &fds, NULL, NULL, NULL);
|
jbe@393
|
497 } else if (nonblock) {
|
jbe@393
|
498 break;
|
jbe@393
|
499 } else {
|
jbe@393
|
500 struct timespec tp;
|
jbe@393
|
501 struct timeval timeout = { 0, };
|
jbe@393
|
502 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
|
jbe@393
|
503 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
|
jbe@393
|
504 }
|
jbe@393
|
505 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
|
jbe@393
|
506 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
|
jbe@393
|
507 if (tp.tv_nsec < 0) {
|
jbe@393
|
508 tp.tv_sec -= 1;
|
jbe@393
|
509 tp.tv_nsec += 1000000000;
|
jbe@393
|
510 }
|
jbe@393
|
511 timeout.tv_sec = tp.tv_sec;
|
jbe@393
|
512 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
|
jbe@393
|
513 if (
|
jbe@393
|
514 timeout.tv_sec < 0 ||
|
jbe@393
|
515 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
|
jbe@393
|
516 ) break;
|
jbe@393
|
517 select(fd+1, &fds, NULL, NULL, &timeout);
|
jbe@393
|
518 }
|
jbe@393
|
519 }
|
jbe@397
|
520 lua_pushnil(L);
|
jbe@397
|
521 lua_pushnil(L);
|
jbe@393
|
522 return 2;
|
jbe@393
|
523 }
|
jbe@393
|
524
|
jbe@23
|
525 // method "create_list" of database handles:
|
jbe/bsw@0
|
526 static int mondelefant_conn_create_list(lua_State *L) {
|
jbe@23
|
527 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
528 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
529 // if no second argument is given, use an empty table:
|
jbe@397
|
530 if (lua_isnoneornil(L, 2)) {
|
jbe@397
|
531 lua_settop(L, 1);
|
jbe@397
|
532 lua_newtable(L); // 2
|
jbe@397
|
533 } else {
|
jbe@397
|
534 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
535 lua_settop(L, 2);
|
jbe/bsw@0
|
536 }
|
jbe@23
|
537 // set meta-table for database result lists/objects:
|
jbe/bsw@0
|
538 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
|
jbe/bsw@0
|
539 lua_setmetatable(L, 2);
|
jbe@23
|
540 // set "_connection" attribute to self:
|
jbe/bsw@0
|
541 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
542 lua_setfield(L, 2, "_connection");
|
jbe@23
|
543 // set "_type" attribute to string "list":
|
jbe/bsw@0
|
544 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
545 lua_setfield(L, 2, "_type");
|
jbe@23
|
546 // return created database result list:
|
jbe/bsw@0
|
547 return 1;
|
jbe/bsw@0
|
548 }
|
jbe/bsw@0
|
549
|
jbe@23
|
550 // method "create_object" of database handles:
|
jbe/bsw@0
|
551 static int mondelefant_conn_create_object(lua_State *L) {
|
jbe@23
|
552 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
553 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
554 // if no second argument is given, use an empty table:
|
jbe@397
|
555 if (lua_isnoneornil(L, 2)) {
|
jbe@397
|
556 lua_settop(L, 1);
|
jbe@397
|
557 lua_newtable(L); // 2
|
jbe@397
|
558 } else {
|
jbe@397
|
559 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
560 lua_settop(L, 2);
|
jbe/bsw@0
|
561 }
|
jbe@397
|
562 // set meta-table for database result lists/objects:
|
jbe/bsw@0
|
563 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
|
jbe/bsw@0
|
564 lua_setmetatable(L, 2);
|
jbe@23
|
565 // set "_connection" attribute to self:
|
jbe/bsw@0
|
566 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
567 lua_setfield(L, 2, "_connection");
|
jbe@23
|
568 // set "_type" attribute to string "object":
|
jbe/bsw@0
|
569 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
570 lua_setfield(L, 2, "_type"); // "object" or "list"
|
jbe@23
|
571 // create empty tables for "_data", "_dirty" and "_ref" attributes:
|
jbe/bsw@0
|
572 lua_newtable(L); // 3
|
jbe/bsw@0
|
573 lua_setfield(L, 2, "_data");
|
jbe/bsw@0
|
574 lua_newtable(L); // 3
|
jbe/bsw@0
|
575 lua_setfield(L, 2, "_dirty");
|
jbe/bsw@0
|
576 lua_newtable(L); // 3
|
jbe/bsw@0
|
577 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
|
jbe@23
|
578 // return created database result object:
|
jbe/bsw@0
|
579 return 1;
|
jbe/bsw@0
|
580 }
|
jbe/bsw@0
|
581
|
jbe@23
|
582 // method "quote_string" of database handles:
|
jbe/bsw@0
|
583 static int mondelefant_conn_quote_string(lua_State *L) {
|
jbe/bsw@0
|
584 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
585 const char *input;
|
jbe/bsw@0
|
586 size_t input_len;
|
jbe/bsw@0
|
587 char *output;
|
jbe/bsw@0
|
588 size_t output_len;
|
jbe@23
|
589 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
590 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
591 // get second argument, which must be a string:
|
jbe/bsw@0
|
592 input = luaL_checklstring(L, 2, &input_len);
|
jbe@23
|
593 // throw error, if string is too long:
|
jbe/bsw@0
|
594 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
|
jbe/bsw@0
|
595 return luaL_error(L, "String to be escaped is too long.");
|
jbe/bsw@0
|
596 }
|
jbe@23
|
597 // allocate memory for quoted string:
|
jbe/bsw@0
|
598 output = malloc((2 * input_len + 3) * sizeof(char));
|
jbe/bsw@0
|
599 if (!output) {
|
jbe/bsw@0
|
600 return luaL_error(L, "Could not allocate memory for string quoting.");
|
jbe/bsw@0
|
601 }
|
jbe@23
|
602 // do escaping by calling PQescapeStringConn and enclosing result with
|
jbe@23
|
603 // single quotes:
|
jbe/bsw@0
|
604 output[0] = '\'';
|
jbe/bsw@0
|
605 output_len = PQescapeStringConn(
|
jbe/bsw@0
|
606 conn->pgconn, output + 1, input, input_len, NULL
|
jbe/bsw@0
|
607 );
|
jbe/bsw@0
|
608 output[output_len + 1] = '\'';
|
jbe/bsw@0
|
609 output[output_len + 2] = 0;
|
jbe@23
|
610 // create Lua string:
|
jbe/bsw@0
|
611 lua_pushlstring(L, output, output_len + 2);
|
jbe@23
|
612 // free allocated memory:
|
jbe/bsw@0
|
613 free(output);
|
jbe@23
|
614 // return Lua string:
|
jbe/bsw@0
|
615 return 1;
|
jbe/bsw@0
|
616 }
|
jbe/bsw@0
|
617
|
jbe@23
|
618 // method "quote_binary" of database handles:
|
jbe/bsw@0
|
619 static int mondelefant_conn_quote_binary(lua_State *L) {
|
jbe/bsw@0
|
620 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
621 const char *input;
|
jbe/bsw@0
|
622 size_t input_len;
|
jbe/bsw@0
|
623 char *output;
|
jbe/bsw@0
|
624 size_t output_len;
|
jbe/bsw@0
|
625 luaL_Buffer buf;
|
jbe@23
|
626 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
627 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
628 // get second argument, which must be a string:
|
jbe/bsw@0
|
629 input = luaL_checklstring(L, 2, &input_len);
|
jbe@23
|
630 // call PQescapeByteaConn, which allocates memory itself:
|
jbe/bsw@0
|
631 output = (char *)PQescapeByteaConn(
|
jbe/bsw@0
|
632 conn->pgconn, (const unsigned char *)input, input_len, &output_len
|
jbe/bsw@0
|
633 );
|
jbe@23
|
634 // if PQescapeByteaConn returned NULL, then throw error:
|
jbe/bsw@0
|
635 if (!output) {
|
jbe/bsw@0
|
636 return luaL_error(L, "Could not allocate memory for binary quoting.");
|
jbe/bsw@0
|
637 }
|
jbe@23
|
638 // create Lua string enclosed by single quotes:
|
jbe/bsw@0
|
639 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
640 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
641 luaL_addlstring(&buf, output, output_len - 1);
|
jbe/bsw@0
|
642 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
643 luaL_pushresult(&buf);
|
jbe@23
|
644 // free memory allocated by PQescapeByteaConn:
|
jbe/bsw@0
|
645 PQfreemem(output);
|
jbe@23
|
646 // return Lua string:
|
jbe/bsw@0
|
647 return 1;
|
jbe/bsw@0
|
648 }
|
jbe/bsw@0
|
649
|
jbe@23
|
650 // method "assemble_command" of database handles:
|
jbe/bsw@0
|
651 static int mondelefant_conn_assemble_command(lua_State *L) {
|
jbe/bsw@0
|
652 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
653 int paramidx = 2;
|
jbe/bsw@0
|
654 const char *template;
|
jbe/bsw@0
|
655 size_t template_pos = 0;
|
jbe/bsw@0
|
656 luaL_Buffer buf;
|
jbe@23
|
657 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
658 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
659 // if second argument is a string, return this string:
|
jbe@397
|
660 if (lua_type(L, 2) == LUA_TSTRING) {
|
jbe@397
|
661 lua_settop(L, 2);
|
jbe/bsw@0
|
662 return 1;
|
jbe/bsw@0
|
663 }
|
jbe@23
|
664 // if second argument has __tostring meta-method,
|
jbe@23
|
665 // then use this method and return its result:
|
jbe/bsw@0
|
666 if (luaL_callmeta(L, 2, "__tostring")) return 1;
|
jbe@23
|
667 // otherwise, require that second argument is a table:
|
jbe/bsw@0
|
668 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
669 // set stack top:
|
jbe@397
|
670 lua_settop(L, 2);
|
jbe@23
|
671 // get first element of table, which must be a string:
|
jbe/bsw@0
|
672 lua_rawgeti(L, 2, 1); // 3
|
jbe/bsw@0
|
673 luaL_argcheck(L,
|
jbe/bsw@0
|
674 lua_isstring(L, 3),
|
jbe/bsw@0
|
675 2,
|
jbe/bsw@0
|
676 "First entry of SQL command structure is not a string."
|
jbe/bsw@0
|
677 );
|
jbe/bsw@0
|
678 template = lua_tostring(L, 3);
|
jbe@23
|
679 // get value of "input_converter" attribute of database connection:
|
jbe/bsw@0
|
680 lua_pushliteral(L, "input_converter"); // 4
|
jbe/bsw@0
|
681 lua_gettable(L, 1); // input_converter at stack position 4
|
jbe@23
|
682 // reserve space on Lua stack:
|
jbe/bsw@0
|
683 lua_pushnil(L); // free space at stack position 5
|
jbe/bsw@0
|
684 lua_pushnil(L); // free space at stack position 6
|
jbe@23
|
685 // initialize Lua buffer for result string:
|
jbe/bsw@0
|
686 luaL_buffinit(L, &buf);
|
jbe@23
|
687 // fill buffer in loop:
|
jbe/bsw@0
|
688 while (1) {
|
jbe@23
|
689 // variable declaration:
|
jbe/bsw@0
|
690 char c;
|
jbe@23
|
691 // get next character:
|
jbe/bsw@0
|
692 c = template[template_pos++];
|
jbe@23
|
693 // break, when character is NULL byte:
|
jbe/bsw@0
|
694 if (!c) break;
|
jbe@23
|
695 // question-mark and dollar-sign are special characters:
|
jbe@23
|
696 if (c == '?' || c == '$') { // special character found
|
jbe@23
|
697 // check, if same character follows:
|
jbe@23
|
698 if (template[template_pos] == c) { // special character is escaped
|
jbe@23
|
699 // consume two characters of input and add one character to buffer:
|
jbe/bsw@0
|
700 template_pos++;
|
jbe/bsw@0
|
701 luaL_addchar(&buf, c);
|
jbe@23
|
702 } else { // special character is not escaped
|
jbe/bsw@0
|
703 luaL_Buffer keybuf;
|
jbe/bsw@0
|
704 int subcmd;
|
jbe@23
|
705 // set 'subcmd' = true, if special character was a dollar-sign,
|
jbe@23
|
706 // set 'subcmd' = false, if special character was a question-mark:
|
jbe/bsw@0
|
707 subcmd = (c == '$');
|
jbe@23
|
708 // read any number of alpha numeric chars or underscores
|
jbe@23
|
709 // and store them on Lua stack:
|
jbe/bsw@0
|
710 luaL_buffinit(L, &keybuf);
|
jbe/bsw@0
|
711 while (1) {
|
jbe/bsw@0
|
712 c = template[template_pos];
|
jbe/bsw@0
|
713 if (
|
jbe/bsw@0
|
714 (c < 'A' || c > 'Z') &&
|
jbe/bsw@0
|
715 (c < 'a' || c > 'z') &&
|
jbe/bsw@0
|
716 (c < '0' || c > '9') &&
|
jbe/bsw@0
|
717 (c != '_')
|
jbe/bsw@0
|
718 ) break;
|
jbe/bsw@0
|
719 luaL_addchar(&keybuf, c);
|
jbe/bsw@0
|
720 template_pos++;
|
jbe/bsw@0
|
721 }
|
jbe/bsw@0
|
722 luaL_pushresult(&keybuf);
|
jbe@23
|
723 // check, if any characters matched:
|
jbe@64
|
724 if (lua_rawlen(L, -1)) {
|
jbe@23
|
725 // if any alpha numeric chars or underscores were found,
|
jbe@23
|
726 // push them on stack as a Lua string and use them to lookup
|
jbe@23
|
727 // value from second argument:
|
jbe/bsw@0
|
728 lua_pushvalue(L, -1); // save key on stack
|
jbe@23
|
729 lua_gettable(L, 2); // fetch value (raw-value)
|
jbe/bsw@0
|
730 } else {
|
jbe@23
|
731 // otherwise push nil and use numeric lookup based on 'paramidx':
|
jbe/bsw@0
|
732 lua_pop(L, 1);
|
jbe/bsw@0
|
733 lua_pushnil(L); // put nil on key position
|
jbe@23
|
734 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
|
jbe/bsw@0
|
735 }
|
jbe@23
|
736 // Lua stack contains: ..., <buffer>, key, raw-value
|
jbe@23
|
737 // branch according to type of special character ("?" or "$"):
|
jbe@23
|
738 if (subcmd) { // dollar-sign
|
jbe/bsw@0
|
739 size_t i;
|
jbe/bsw@0
|
740 size_t count;
|
jbe@23
|
741 // store fetched value (which is supposed to be sub-structure)
|
jbe@23
|
742 // on Lua stack position 5 and drop key:
|
jbe@23
|
743 lua_replace(L, 5);
|
jbe@23
|
744 lua_pop(L, 1);
|
jbe@23
|
745 // Lua stack contains: ..., <buffer>
|
jbe@23
|
746 // check, if fetched value is really a sub-structure:
|
jbe/bsw@0
|
747 luaL_argcheck(L,
|
jbe/bsw@0
|
748 !lua_isnil(L, 5),
|
jbe/bsw@0
|
749 2,
|
jbe/bsw@0
|
750 "SQL sub-structure not found."
|
jbe/bsw@0
|
751 );
|
jbe/bsw@0
|
752 luaL_argcheck(L,
|
jbe/bsw@0
|
753 lua_type(L, 5) == LUA_TTABLE,
|
jbe/bsw@0
|
754 2,
|
jbe/bsw@0
|
755 "SQL sub-structure must be a table."
|
jbe/bsw@0
|
756 );
|
jbe@23
|
757 // Lua stack contains: ..., <buffer>
|
jbe@23
|
758 // get value of "sep" attribute of sub-structure,
|
jbe@23
|
759 // and place it on Lua stack position 6:
|
jbe/bsw@0
|
760 lua_getfield(L, 5, "sep");
|
jbe@23
|
761 lua_replace(L, 6);
|
jbe@23
|
762 // if seperator is nil, then use ", " as default,
|
jbe@23
|
763 // if seperator is neither nil nor a string, then throw error:
|
jbe/bsw@0
|
764 if (lua_isnil(L, 6)) {
|
jbe/bsw@0
|
765 lua_pushstring(L, ", ");
|
jbe/bsw@0
|
766 lua_replace(L, 6);
|
jbe/bsw@0
|
767 } else {
|
jbe/bsw@0
|
768 luaL_argcheck(L,
|
jbe/bsw@0
|
769 lua_isstring(L, 6),
|
jbe/bsw@0
|
770 2,
|
jbe/bsw@0
|
771 "Seperator of SQL sub-structure has to be a string."
|
jbe/bsw@0
|
772 );
|
jbe/bsw@0
|
773 }
|
jbe@23
|
774 // iterate over items of sub-structure:
|
jbe@64
|
775 count = lua_rawlen(L, 5);
|
jbe/bsw@0
|
776 for (i = 0; i < count; i++) {
|
jbe@23
|
777 // add seperator, unless this is the first run:
|
jbe/bsw@0
|
778 if (i) {
|
jbe/bsw@0
|
779 lua_pushvalue(L, 6);
|
jbe/bsw@0
|
780 luaL_addvalue(&buf);
|
jbe/bsw@0
|
781 }
|
jbe@23
|
782 // recursivly apply assemble function and add results to buffer:
|
jbe/bsw@0
|
783 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
784 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
785 lua_rawgeti(L, 5, i+1);
|
jbe/bsw@0
|
786 lua_call(L, 2, 1);
|
jbe/bsw@0
|
787 luaL_addvalue(&buf);
|
jbe/bsw@0
|
788 }
|
jbe@23
|
789 } else { // question-mark
|
jbe/bsw@0
|
790 if (lua_toboolean(L, 4)) {
|
jbe@23
|
791 // call input_converter with connection handle, raw-value and
|
jbe@23
|
792 // an info-table which contains a "field_name" entry with the
|
jbe@23
|
793 // used key:
|
jbe/bsw@0
|
794 lua_pushvalue(L, 4);
|
jbe/bsw@0
|
795 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
796 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
797 lua_newtable(L);
|
jbe/bsw@0
|
798 lua_pushvalue(L, -6);
|
jbe/bsw@0
|
799 lua_setfield(L, -2, "field_name");
|
jbe/bsw@0
|
800 lua_call(L, 3, 1);
|
jbe@23
|
801 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
|
jbe@23
|
802 // remove key and raw-value:
|
jbe/bsw@0
|
803 lua_remove(L, -2);
|
jbe/bsw@0
|
804 lua_remove(L, -2);
|
jbe@23
|
805 // Lua stack contains: ..., <buffer>, final-value
|
jbe@23
|
806 // throw error, if final-value is not a string:
|
jbe/bsw@0
|
807 if (!lua_isstring(L, -1)) {
|
jbe/bsw@0
|
808 return luaL_error(L, "input_converter returned non-string.");
|
jbe/bsw@0
|
809 }
|
jbe/bsw@0
|
810 } else {
|
jbe@23
|
811 // remove key from stack:
|
jbe/bsw@0
|
812 lua_remove(L, -2);
|
jbe@23
|
813 // Lua stack contains: ..., <buffer>, raw-value
|
jbe@23
|
814 // branch according to type of value:
|
jbe@23
|
815 if (lua_isnil(L, -1)) { // value is nil
|
jbe@23
|
816 // push string "NULL" to stack:
|
jbe/bsw@0
|
817 lua_pushliteral(L, "NULL");
|
jbe@23
|
818 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
|
jbe@23
|
819 // push strings "TRUE" or "FALSE" to stack:
|
jbe/bsw@0
|
820 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
|
jbe@23
|
821 } else if (lua_isstring(L, -1)) { // value is string or number
|
jbe/bsw@0
|
822 // NOTE: In this version of lua a number will be converted
|
jbe@23
|
823 // push output of "quote_string" method of database
|
jbe@23
|
824 // connection to stack:
|
jbe/bsw@0
|
825 lua_tostring(L, -1);
|
jbe/bsw@0
|
826 lua_pushcfunction(L, mondelefant_conn_quote_string);
|
jbe/bsw@0
|
827 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
828 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
829 lua_call(L, 2, 1);
|
jbe@23
|
830 } else { // value is of other type
|
jbe@23
|
831 // throw error:
|
jbe/bsw@0
|
832 return luaL_error(L,
|
jbe/bsw@0
|
833 "Unable to convert SQL value due to unknown type "
|
jbe/bsw@0
|
834 "or missing input_converter."
|
jbe/bsw@0
|
835 );
|
jbe/bsw@0
|
836 }
|
jbe@23
|
837 // Lua stack contains: ..., <buffer>, raw-value, final-value
|
jbe@23
|
838 // remove raw-value:
|
jbe/bsw@0
|
839 lua_remove(L, -2);
|
jbe@23
|
840 // Lua stack contains: ..., <buffer>, final-value
|
jbe/bsw@0
|
841 }
|
jbe@23
|
842 // append final-value to buffer:
|
jbe/bsw@0
|
843 luaL_addvalue(&buf);
|
jbe/bsw@0
|
844 }
|
jbe/bsw@0
|
845 }
|
jbe@23
|
846 } else { // character is not special
|
jbe@23
|
847 // just copy character:
|
jbe/bsw@0
|
848 luaL_addchar(&buf, c);
|
jbe/bsw@0
|
849 }
|
jbe/bsw@0
|
850 }
|
jbe@23
|
851 // return string in buffer:
|
jbe/bsw@0
|
852 luaL_pushresult(&buf);
|
jbe/bsw@0
|
853 return 1;
|
jbe/bsw@0
|
854 }
|
jbe/bsw@0
|
855
|
jbe@23
|
856 // max number of SQL statements executed by one "query" method call:
|
jbe/bsw@0
|
857 #define MONDELEFANT_MAX_COMMAND_COUNT 64
|
jbe@23
|
858 // max number of columns in a database result:
|
jbe/bsw@0
|
859 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
|
jbe@23
|
860 // enum values for 'modes' array in C-function below:
|
jbe/bsw@0
|
861 #define MONDELEFANT_QUERY_MODE_LIST 1
|
jbe/bsw@0
|
862 #define MONDELEFANT_QUERY_MODE_OBJECT 2
|
jbe/bsw@0
|
863 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
|
jbe/bsw@0
|
864
|
jbe@23
|
865 // method "try_query" of database handles:
|
jbe/bsw@0
|
866 static int mondelefant_conn_try_query(lua_State *L) {
|
jbe/bsw@0
|
867 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
868 int command_count;
|
jbe/bsw@0
|
869 int command_idx;
|
jbe/bsw@0
|
870 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
|
jbe/bsw@0
|
871 luaL_Buffer buf;
|
jbe/bsw@0
|
872 int sent_success;
|
jbe/bsw@0
|
873 PGresult *res;
|
jbe/bsw@0
|
874 int rows, cols, row, col;
|
jbe@23
|
875 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
876 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
877 // calculate number of commands (2 arguments for one command):
|
jbe/bsw@0
|
878 command_count = lua_gettop(L) / 2;
|
jbe@23
|
879 // push nil on stack, which is needed, if last mode was ommitted:
|
jbe@23
|
880 lua_pushnil(L);
|
jbe@23
|
881 // throw error, if number of commands is too high:
|
jbe/bsw@0
|
882 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
|
jbe/bsw@0
|
883 return luaL_error(L, "Exceeded maximum command count in one query.");
|
jbe/bsw@0
|
884 }
|
jbe@23
|
885 // create SQL string, store query modes and push SQL string on stack:
|
jbe/bsw@0
|
886 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
887 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
888 int mode;
|
jbe/bsw@0
|
889 int mode_idx; // stack index of mode string
|
jbe/bsw@0
|
890 if (command_idx) luaL_addchar(&buf, ' ');
|
jbe/bsw@0
|
891 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
892 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
893 lua_pushvalue(L, 2 + 2 * command_idx);
|
jbe/bsw@0
|
894 lua_call(L, 2, 1);
|
jbe/bsw@0
|
895 luaL_addvalue(&buf);
|
jbe/bsw@0
|
896 luaL_addchar(&buf, ';');
|
jbe/bsw@0
|
897 mode_idx = 3 + 2 * command_idx;
|
jbe/bsw@0
|
898 if (lua_isnil(L, mode_idx)) {
|
jbe/bsw@0
|
899 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
900 } else {
|
jbe/bsw@0
|
901 const char *modestr;
|
jbe/bsw@0
|
902 modestr = luaL_checkstring(L, mode_idx);
|
jbe/bsw@0
|
903 if (!strcmp(modestr, "list")) {
|
jbe/bsw@0
|
904 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
905 } else if (!strcmp(modestr, "object")) {
|
jbe/bsw@0
|
906 mode = MONDELEFANT_QUERY_MODE_OBJECT;
|
jbe/bsw@0
|
907 } else if (!strcmp(modestr, "opt_object")) {
|
jbe/bsw@0
|
908 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
|
jbe/bsw@0
|
909 } else {
|
jbe@397
|
910 return luaL_argerror(L, mode_idx, "unknown query mode");
|
jbe/bsw@0
|
911 }
|
jbe/bsw@0
|
912 }
|
jbe/bsw@0
|
913 modes[command_idx] = mode;
|
jbe/bsw@0
|
914 }
|
jbe/bsw@0
|
915 luaL_pushresult(&buf); // stack position unknown
|
jbe/bsw@0
|
916 lua_replace(L, 2); // SQL command string to stack position 2
|
jbe@23
|
917 // call sql_tracer, if set:
|
jbe/bsw@0
|
918 lua_settop(L, 2);
|
jbe/bsw@0
|
919 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
|
jbe/bsw@0
|
920 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
921 lua_pushvalue(L, 1); // 4
|
jbe/bsw@0
|
922 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
923 lua_call(L, 2, 1); // trace callback at stack position 3
|
jbe/bsw@0
|
924 }
|
jbe@23
|
925 // NOTE: If no tracer was found, then nil or false is stored at stack
|
jbe@23
|
926 // position 3.
|
jbe@23
|
927 // call PQsendQuery function and store result in 'sent_success' variable:
|
jbe/bsw@0
|
928 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
|
jbe@23
|
929 // create preliminary result table:
|
jbe/bsw@0
|
930 lua_newtable(L); // results in table at stack position 4
|
jbe@23
|
931 // iterate over results using function PQgetResult to fill result table:
|
jbe/bsw@0
|
932 for (command_idx = 0; ; command_idx++) {
|
jbe/bsw@0
|
933 int mode;
|
jbe/bsw@0
|
934 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
|
jbe/bsw@0
|
935 ExecStatusType pgstatus;
|
jbe@23
|
936 // fetch mode which was given for the command:
|
jbe/bsw@0
|
937 mode = modes[command_idx];
|
jbe@23
|
938 // if PQsendQuery call was successful, then fetch result data:
|
jbe/bsw@0
|
939 if (sent_success) {
|
jbe@23
|
940 // NOTE: PQgetResult called one extra time. Break only, if all
|
jbe@23
|
941 // queries have been processed and PQgetResult returned NULL.
|
jbe/bsw@0
|
942 res = PQgetResult(conn->pgconn);
|
jbe/bsw@0
|
943 if (command_idx >= command_count && !res) break;
|
jbe/bsw@0
|
944 if (res) {
|
jbe/bsw@0
|
945 pgstatus = PQresultStatus(res);
|
jbe/bsw@0
|
946 rows = PQntuples(res);
|
jbe/bsw@0
|
947 cols = PQnfields(res);
|
jbe/bsw@0
|
948 }
|
jbe/bsw@0
|
949 }
|
jbe@23
|
950 // handle errors:
|
jbe/bsw@0
|
951 if (
|
jbe/bsw@0
|
952 !sent_success || command_idx >= command_count || !res ||
|
jbe/bsw@0
|
953 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
|
jbe/bsw@0
|
954 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
|
jbe/bsw@0
|
955 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
|
jbe/bsw@0
|
956 ) {
|
jbe/bsw@0
|
957 const char *command;
|
jbe/bsw@0
|
958 command = lua_tostring(L, 2);
|
jbe/bsw@0
|
959 lua_newtable(L); // 5
|
jbe/bsw@0
|
960 lua_getfield(L,
|
jbe/bsw@0
|
961 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
962 MONDELEFANT_ERROROBJECT_MT_REGKEY
|
jbe/bsw@0
|
963 );
|
jbe/bsw@0
|
964 lua_setmetatable(L, 5);
|
jbe/bsw@0
|
965 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
966 lua_setfield(L, 5, "connection");
|
jbe/bsw@0
|
967 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
968 lua_setfield(L, 5, "sql_command");
|
jbe@397
|
969 if (!sent_success) {
|
jbe@397
|
970 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe/bsw@0
|
971 lua_setfield(L, 5, "code");
|
jbe@397
|
972 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
|
jbe/bsw@0
|
973 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
974 } else {
|
jbe@397
|
975 lua_pushinteger(L, command_idx + 1);
|
jbe@397
|
976 lua_setfield(L, 5, "command_number");
|
jbe@397
|
977 if (!res) {
|
jbe@397
|
978 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
|
jbe@397
|
979 lua_setfield(L, 5, "code");
|
jbe@397
|
980 lua_pushliteral(L, "Received too few database result sets.");
|
jbe@397
|
981 lua_setfield(L, 5, "message");
|
jbe@397
|
982 } else if (command_idx >= command_count) {
|
jbe@397
|
983 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
|
jbe@397
|
984 lua_setfield(L, 5, "code");
|
jbe@397
|
985 lua_pushliteral(L, "Received too many database result sets.");
|
jbe@397
|
986 lua_setfield(L, 5, "message");
|
jbe@397
|
987 } else if (
|
jbe@397
|
988 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
|
jbe@397
|
989 ) {
|
jbe@397
|
990 const char *sqlstate;
|
jbe@397
|
991 const char *errmsg;
|
jbe@397
|
992 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
|
jbe@397
|
993 lua_setfield(L, 5, "pg_severity");
|
jbe@397
|
994 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
|
jbe@397
|
995 if (sqlstate) {
|
jbe@397
|
996 lua_pushstring(L, sqlstate);
|
jbe@397
|
997 lua_setfield(L, 5, "pg_sqlstate");
|
jbe@397
|
998 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
|
jbe@397
|
999 lua_setfield(L, 5, "code");
|
jbe@397
|
1000 } else {
|
jbe@397
|
1001 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
|
jbe@397
|
1002 lua_setfield(L, 5, "code");
|
jbe@397
|
1003 }
|
jbe@397
|
1004 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
|
jbe@397
|
1005 if (errmsg) {
|
jbe@397
|
1006 mondelefant_push_first_line(L, errmsg);
|
jbe@397
|
1007 lua_setfield(L, 5, "message");
|
jbe@397
|
1008 lua_pushstring(L, errmsg);
|
jbe@397
|
1009 lua_setfield(L, 5, "pg_message_primary");
|
jbe@397
|
1010 } else {
|
jbe@397
|
1011 lua_pushliteral(L,
|
jbe@397
|
1012 "Error while fetching result, but no error message given."
|
jbe@397
|
1013 );
|
jbe@397
|
1014 lua_setfield(L, 5, "message");
|
jbe@397
|
1015 }
|
jbe@397
|
1016 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
|
jbe@397
|
1017 lua_setfield(L, 5, "pg_message_detail");
|
jbe@397
|
1018 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
|
jbe@397
|
1019 lua_setfield(L, 5, "pg_message_hint");
|
jbe@397
|
1020 // NOTE: "position" and "pg_internal_position" are recalculated to
|
jbe@397
|
1021 // byte offsets, as Lua 5.2 is not Unicode aware.
|
jbe@397
|
1022 {
|
jbe@397
|
1023 char *tmp;
|
jbe@397
|
1024 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
|
jbe@397
|
1025 if (tmp) {
|
jbe@397
|
1026 int pos;
|
jbe@397
|
1027 pos = atoi(tmp) - 1;
|
jbe@397
|
1028 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe@397
|
1029 pos = utf8_position_to_byte(command, pos);
|
jbe@397
|
1030 }
|
jbe@397
|
1031 lua_pushinteger(L, pos + 1);
|
jbe@397
|
1032 lua_setfield(L, 5, "position");
|
jbe@397
|
1033 }
|
jbe@397
|
1034 }
|
jbe@397
|
1035 {
|
jbe@397
|
1036 const char *internal_query;
|
jbe@397
|
1037 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
|
jbe@397
|
1038 lua_pushstring(L, internal_query);
|
jbe@397
|
1039 lua_setfield(L, 5, "pg_internal_query");
|
jbe@397
|
1040 char *tmp;
|
jbe@397
|
1041 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
|
jbe@397
|
1042 if (tmp) {
|
jbe@397
|
1043 int pos;
|
jbe@397
|
1044 pos = atoi(tmp) - 1;
|
jbe@397
|
1045 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe@397
|
1046 pos = utf8_position_to_byte(internal_query, pos);
|
jbe@397
|
1047 }
|
jbe@397
|
1048 lua_pushinteger(L, pos + 1);
|
jbe@397
|
1049 lua_setfield(L, 5, "pg_internal_position");
|
jbe@397
|
1050 }
|
jbe@397
|
1051 }
|
jbe@397
|
1052 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
|
jbe@397
|
1053 lua_setfield(L, 5, "pg_context");
|
jbe@397
|
1054 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
|
jbe@397
|
1055 lua_setfield(L, 5, "pg_source_file");
|
jbe@397
|
1056 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
|
jbe@397
|
1057 lua_setfield(L, 5, "pg_source_line");
|
jbe@397
|
1058 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
|
jbe@397
|
1059 lua_setfield(L, 5, "pg_source_function");
|
jbe@397
|
1060 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
|
jbe@397
|
1061 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
|
jbe@397
|
1062 lua_setfield(L, 5, "code");
|
jbe@397
|
1063 lua_pushliteral(L, "Expected one row, but got empty set.");
|
jbe@397
|
1064 lua_setfield(L, 5, "message");
|
jbe@397
|
1065 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
|
jbe@397
|
1066 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
|
jbe@397
|
1067 lua_setfield(L, 5, "code");
|
jbe@397
|
1068 lua_pushliteral(L, "Got more than one result row.");
|
jbe@397
|
1069 lua_setfield(L, 5, "message");
|
jbe@397
|
1070 } else {
|
jbe@397
|
1071 // should not happen
|
jbe@397
|
1072 abort();
|
jbe@397
|
1073 }
|
jbe@397
|
1074 if (res) {
|
jbe@397
|
1075 PQclear(res);
|
jbe@397
|
1076 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
|
jbe@397
|
1077 }
|
jbe/bsw@0
|
1078 }
|
jbe/bsw@0
|
1079 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1080 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
1081 lua_pushvalue(L, 5);
|
jbe/bsw@0
|
1082 lua_call(L, 1, 0);
|
jbe/bsw@0
|
1083 }
|
jbe/bsw@0
|
1084 return 1;
|
jbe/bsw@0
|
1085 }
|
jbe@23
|
1086 // call "create_list" or "create_object" method of database handle,
|
jbe@23
|
1087 // result will be at stack position 5:
|
jbe/bsw@0
|
1088 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1089 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
|
jbe/bsw@0
|
1090 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
1091 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
1092 } else {
|
jbe/bsw@0
|
1093 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
|
jbe/bsw@0
|
1094 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
1095 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
1096 }
|
jbe@23
|
1097 // set "_column_info":
|
jbe@23
|
1098 lua_newtable(L); // 6
|
jbe/bsw@0
|
1099 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1100 lua_newtable(L); // 7
|
jbe@380
|
1101 lua_pushstring(L, PQfname(res, col)); // 8
|
jbe@380
|
1102 lua_pushvalue(L, 8); // 9
|
jbe@380
|
1103 lua_pushvalue(L, 7); // 10
|
jbe@380
|
1104 lua_rawset(L, 6);
|
jbe/bsw@0
|
1105 lua_setfield(L, 7, "field_name");
|
jbe@380
|
1106 // _column_info entry (for current column) on stack position 7
|
jbe/bsw@0
|
1107 {
|
jbe/bsw@0
|
1108 Oid tmp;
|
jbe/bsw@0
|
1109 tmp = PQftable(res, col);
|
jbe/bsw@0
|
1110 if (tmp == InvalidOid) lua_pushnil(L);
|
jbe/bsw@0
|
1111 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1112 lua_setfield(L, 7, "table_oid");
|
jbe/bsw@0
|
1113 }
|
jbe/bsw@0
|
1114 {
|
jbe/bsw@0
|
1115 int tmp;
|
jbe/bsw@0
|
1116 tmp = PQftablecol(res, col);
|
jbe/bsw@0
|
1117 if (tmp == 0) lua_pushnil(L);
|
jbe/bsw@0
|
1118 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1119 lua_setfield(L, 7, "table_column_number");
|
jbe/bsw@0
|
1120 }
|
jbe/bsw@0
|
1121 {
|
jbe/bsw@0
|
1122 Oid tmp;
|
jbe/bsw@0
|
1123 tmp = PQftype(res, col);
|
jbe/bsw@0
|
1124 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
|
jbe/bsw@0
|
1125 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1126 lua_setfield(L, 7, "type_oid");
|
jbe/bsw@0
|
1127 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
|
jbe/bsw@0
|
1128 lua_setfield(L, 7, "type");
|
jbe/bsw@0
|
1129 }
|
jbe/bsw@0
|
1130 {
|
jbe/bsw@0
|
1131 int tmp;
|
jbe/bsw@0
|
1132 tmp = PQfmod(res, col);
|
jbe/bsw@0
|
1133 if (tmp == -1) lua_pushnil(L);
|
jbe/bsw@0
|
1134 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1135 lua_setfield(L, 7, "type_modifier");
|
jbe/bsw@0
|
1136 }
|
jbe/bsw@0
|
1137 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1138 }
|
jbe@23
|
1139 lua_setfield(L, 5, "_column_info");
|
jbe@23
|
1140 // set "_rows_affected":
|
jbe/bsw@0
|
1141 {
|
jbe/bsw@0
|
1142 char *tmp;
|
jbe/bsw@0
|
1143 tmp = PQcmdTuples(res);
|
jbe/bsw@0
|
1144 if (tmp[0]) {
|
jbe/bsw@0
|
1145 lua_pushinteger(L, atoi(tmp));
|
jbe/bsw@0
|
1146 lua_setfield(L, 5, "_rows_affected");
|
jbe/bsw@0
|
1147 }
|
jbe/bsw@0
|
1148 }
|
jbe@23
|
1149 // set "_oid":
|
jbe/bsw@0
|
1150 {
|
jbe/bsw@0
|
1151 Oid tmp;
|
jbe/bsw@0
|
1152 tmp = PQoidValue(res);
|
jbe/bsw@0
|
1153 if (tmp != InvalidOid) {
|
jbe/bsw@0
|
1154 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1155 lua_setfield(L, 5, "_oid");
|
jbe/bsw@0
|
1156 }
|
jbe/bsw@0
|
1157 }
|
jbe@23
|
1158 // copy data as strings or nil, while performing binary unescaping
|
jbe@23
|
1159 // automatically:
|
jbe/bsw@0
|
1160 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1161 for (row = 0; row < rows; row++) {
|
jbe/bsw@0
|
1162 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
|
jbe/bsw@0
|
1163 lua_pushvalue(L, 1); // 7
|
jbe/bsw@0
|
1164 lua_call(L, 1, 1); // 6
|
jbe/bsw@0
|
1165 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1166 if (PQgetisnull(res, row, col)) {
|
jbe/bsw@0
|
1167 lua_pushnil(L);
|
jbe/bsw@0
|
1168 } else if (binary[col]) {
|
jbe/bsw@0
|
1169 size_t binlen;
|
jbe/bsw@0
|
1170 char *binval;
|
jbe/bsw@0
|
1171 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1172 (unsigned char *)PQgetvalue(res, row, col), &binlen
|
jbe/bsw@0
|
1173 );
|
jbe/bsw@0
|
1174 if (!binval) {
|
jbe/bsw@0
|
1175 return luaL_error(L,
|
jbe/bsw@0
|
1176 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1177 );
|
jbe/bsw@0
|
1178 }
|
jbe/bsw@0
|
1179 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1180 PQfreemem(binval);
|
jbe/bsw@0
|
1181 } else {
|
jbe/bsw@0
|
1182 lua_pushstring(L, PQgetvalue(res, row, col));
|
jbe/bsw@0
|
1183 }
|
jbe/bsw@0
|
1184 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1185 }
|
jbe/bsw@0
|
1186 lua_rawseti(L, 5, row+1);
|
jbe/bsw@0
|
1187 }
|
jbe/bsw@0
|
1188 } else if (rows == 1) {
|
jbe/bsw@0
|
1189 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1190 if (PQgetisnull(res, 0, col)) {
|
jbe/bsw@0
|
1191 lua_pushnil(L);
|
jbe/bsw@0
|
1192 } else if (binary[col]) {
|
jbe/bsw@0
|
1193 size_t binlen;
|
jbe/bsw@0
|
1194 char *binval;
|
jbe/bsw@0
|
1195 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1196 (unsigned char *)PQgetvalue(res, 0, col), &binlen
|
jbe/bsw@0
|
1197 );
|
jbe/bsw@0
|
1198 if (!binval) {
|
jbe/bsw@0
|
1199 return luaL_error(L,
|
jbe/bsw@0
|
1200 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1201 );
|
jbe/bsw@0
|
1202 }
|
jbe/bsw@0
|
1203 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1204 PQfreemem(binval);
|
jbe/bsw@0
|
1205 } else {
|
jbe/bsw@0
|
1206 lua_pushstring(L, PQgetvalue(res, 0, col));
|
jbe/bsw@0
|
1207 }
|
jbe/bsw@0
|
1208 lua_rawseti(L, 5, col+1);
|
jbe/bsw@0
|
1209 }
|
jbe/bsw@0
|
1210 } else {
|
jbe/bsw@0
|
1211 // no row in optrow mode
|
jbe/bsw@0
|
1212 lua_pop(L, 1);
|
jbe/bsw@0
|
1213 lua_pushnil(L);
|
jbe/bsw@0
|
1214 }
|
jbe@23
|
1215 // save result in result list:
|
jbe/bsw@0
|
1216 lua_rawseti(L, 4, command_idx+1);
|
jbe@23
|
1217 // extra assertion:
|
jbe/bsw@0
|
1218 if (lua_gettop(L) != 4) abort(); // should not happen
|
jbe@23
|
1219 // free memory acquired by libpq:
|
jbe/bsw@0
|
1220 PQclear(res);
|
jbe/bsw@0
|
1221 }
|
jbe/bsw@0
|
1222 // trace callback at stack position 3
|
jbe/bsw@0
|
1223 // result at stack position 4 (top of stack)
|
jbe@23
|
1224 // if a trace callback is existent, then call:
|
jbe/bsw@0
|
1225 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1226 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
1227 lua_call(L, 0, 0);
|
jbe/bsw@0
|
1228 }
|
jbe@23
|
1229 // put result at stack position 3:
|
jbe@23
|
1230 lua_replace(L, 3);
|
jbe@23
|
1231 // get output converter to stack position 4:
|
jbe@23
|
1232 lua_getfield(L, 1, "output_converter");
|
jbe@374
|
1233 // get mutability state saver to stack position 5:
|
jbe@375
|
1234 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
|
jbe@375
|
1235 lua_getfield(L, -1, "save_mutability_state");
|
jbe@375
|
1236 lua_replace(L, -2);
|
jbe@23
|
1237 // apply output converters and fill "_data" table according to column names:
|
jbe/bsw@0
|
1238 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1239 int mode;
|
jbe/bsw@0
|
1240 mode = modes[command_idx];
|
jbe@374
|
1241 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
|
jbe@374
|
1242 if (lua_toboolean(L, 6)) {
|
jbe@374
|
1243 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
|
jbe@374
|
1244 cols = lua_rawlen(L, 7);
|
jbe/bsw@0
|
1245 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe@374
|
1246 rows = lua_rawlen(L, 6);
|
jbe/bsw@0
|
1247 for (row = 0; row < rows; row++) {
|
jbe@374
|
1248 lua_rawgeti(L, 6, row+1); // row at stack position 8
|
jbe@374
|
1249 lua_getfield(L, 8, "_data"); // _data table at stack position 9
|
jbe@375
|
1250 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
|
jbe/bsw@0
|
1251 for (col = 0; col < cols; col++) {
|
jbe@375
|
1252 lua_rawgeti(L, 7, col+1); // this column info at position 11
|
jbe@375
|
1253 lua_getfield(L, 11, "field_name"); // 12
|
jbe/bsw@0
|
1254 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1255 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1256 lua_pushvalue(L, 1); // connection
|
jbe@374
|
1257 lua_rawgeti(L, 8, col+1); // raw-value
|
jbe@375
|
1258 lua_pushvalue(L, 11); // this column info
|
jbe@375
|
1259 lua_call(L, 3, 1); // converted value at position 13
|
jbe/bsw@0
|
1260 } else {
|
jbe@375
|
1261 lua_rawgeti(L, 8, col+1); // raw-value at position 13
|
jbe/bsw@0
|
1262 }
|
jbe@375
|
1263 if (lua_toboolean(L, 5)) { // handle mutable values?
|
jbe@375
|
1264 lua_pushvalue(L, 12); // copy of field name
|
jbe@375
|
1265 lua_pushvalue(L, 5); // mutability state saver function
|
jbe@375
|
1266 lua_pushvalue(L, 13); // copy of value
|
jbe@375
|
1267 lua_call(L, 1, 1); // calculated mutability state of value
|
jbe@375
|
1268 lua_rawset(L, 10); // store mutability state in _dirty table
|
jbe@375
|
1269 }
|
jbe@375
|
1270 lua_pushvalue(L, 13); // 14
|
jbe@374
|
1271 lua_rawseti(L, 8, col+1);
|
jbe@374
|
1272 lua_rawset(L, 9);
|
jbe@399
|
1273 lua_settop(L, 10);
|
jbe/bsw@0
|
1274 }
|
jbe@374
|
1275 lua_settop(L, 7);
|
jbe/bsw@0
|
1276 }
|
jbe/bsw@0
|
1277 } else {
|
jbe@374
|
1278 lua_getfield(L, 6, "_data"); // _data table at stack position 8
|
jbe@375
|
1279 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
|
jbe/bsw@0
|
1280 for (col = 0; col < cols; col++) {
|
jbe@375
|
1281 lua_rawgeti(L, 7, col+1); // this column info at position 10
|
jbe@375
|
1282 lua_getfield(L, 10, "field_name"); // 11
|
jbe/bsw@0
|
1283 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1284 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1285 lua_pushvalue(L, 1); // connection
|
jbe@374
|
1286 lua_rawgeti(L, 6, col+1); // raw-value
|
jbe@375
|
1287 lua_pushvalue(L, 10); // this column info
|
jbe@375
|
1288 lua_call(L, 3, 1); // converted value at position 12
|
jbe/bsw@0
|
1289 } else {
|
jbe@375
|
1290 lua_rawgeti(L, 6, col+1); // raw-value at position 12
|
jbe/bsw@0
|
1291 }
|
jbe@375
|
1292 if (lua_toboolean(L, 5)) { // handle mutable values?
|
jbe@375
|
1293 lua_pushvalue(L, 11); // copy of field name
|
jbe@375
|
1294 lua_pushvalue(L, 5); // mutability state saver function
|
jbe@375
|
1295 lua_pushvalue(L, 12); // copy of value
|
jbe@375
|
1296 lua_call(L, 1, 1); // calculated mutability state of value
|
jbe@375
|
1297 lua_rawset(L, 9); // store mutability state in _dirty table
|
jbe@375
|
1298 }
|
jbe@375
|
1299 lua_pushvalue(L, 12); // 13
|
jbe@374
|
1300 lua_rawseti(L, 6, col+1);
|
jbe@374
|
1301 lua_rawset(L, 8);
|
jbe@399
|
1302 lua_settop(L, 9);
|
jbe/bsw@0
|
1303 }
|
jbe/bsw@0
|
1304 }
|
jbe/bsw@0
|
1305 }
|
jbe@374
|
1306 lua_settop(L, 5);
|
jbe/bsw@0
|
1307 }
|
jbe@23
|
1308 // return nil as first result value, followed by result lists/objects:
|
jbe/bsw@0
|
1309 lua_settop(L, 3);
|
jbe/bsw@0
|
1310 lua_pushnil(L);
|
jbe/bsw@0
|
1311 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1312 lua_rawgeti(L, 3, command_idx+1);
|
jbe/bsw@0
|
1313 }
|
jbe/bsw@0
|
1314 return command_count+1;
|
jbe/bsw@0
|
1315 }
|
jbe/bsw@0
|
1316
|
jbe@397
|
1317 // method "is_kind_of" of error objects:
|
jbe@397
|
1318 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
|
jbe@397
|
1319 const char *errclass;
|
jbe@397
|
1320 luaL_checktype(L, 1, LUA_TTABLE);
|
jbe@397
|
1321 errclass = luaL_checkstring(L, 2);
|
jbe@397
|
1322 lua_settop(L, 2);
|
jbe@397
|
1323 lua_getfield(L, 1, "code"); // 3
|
jbe@397
|
1324 luaL_argcheck(L,
|
jbe@397
|
1325 lua_type(L, 3) == LUA_TSTRING,
|
jbe@397
|
1326 1,
|
jbe@397
|
1327 "field 'code' of error object is not a string"
|
jbe@397
|
1328 );
|
jbe@397
|
1329 lua_pushboolean(L,
|
jbe@397
|
1330 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
|
jbe@397
|
1331 );
|
jbe@397
|
1332 return 1;
|
jbe@397
|
1333 }
|
jbe@397
|
1334
|
jbe@397
|
1335 // method "wait" of database handles:
|
jbe@397
|
1336 static int mondelefant_conn_wait(lua_State *L) {
|
jbe@397
|
1337 int argc;
|
jbe@397
|
1338 // count number of arguments:
|
jbe@397
|
1339 argc = lua_gettop(L);
|
jbe@397
|
1340 // insert "try_wait" function/method at stack position 1:
|
jbe@397
|
1341 lua_pushcfunction(L, mondelefant_conn_try_wait);
|
jbe@397
|
1342 lua_insert(L, 1);
|
jbe@397
|
1343 // call "try_wait" method:
|
jbe@397
|
1344 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
|
jbe@397
|
1345 // check, if error occurred:
|
jbe@397
|
1346 if (lua_toboolean(L, 1)) {
|
jbe@397
|
1347 // raise error
|
jbe/bsw@0
|
1348 lua_settop(L, 1);
|
jbe/bsw@0
|
1349 return lua_error(L);
|
jbe/bsw@0
|
1350 } else {
|
jbe@397
|
1351 // return everything but nil error object:
|
jbe@397
|
1352 return lua_gettop(L) - 1;
|
jbe/bsw@0
|
1353 }
|
jbe/bsw@0
|
1354 }
|
jbe/bsw@0
|
1355
|
jbe@23
|
1356 // method "query" of database handles:
|
jbe/bsw@0
|
1357 static int mondelefant_conn_query(lua_State *L) {
|
jbe/bsw@0
|
1358 int argc;
|
jbe@23
|
1359 // count number of arguments:
|
jbe/bsw@0
|
1360 argc = lua_gettop(L);
|
jbe@23
|
1361 // insert "try_query" function/method at stack position 1:
|
jbe/bsw@0
|
1362 lua_pushcfunction(L, mondelefant_conn_try_query);
|
jbe@23
|
1363 lua_insert(L, 1);
|
jbe@23
|
1364 // call "try_query" method:
|
jbe@23
|
1365 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
|
jbe@23
|
1366 // check, if error occurred:
|
jbe@23
|
1367 if (lua_toboolean(L, 1)) {
|
jbe@397
|
1368 // raise error
|
jbe@397
|
1369 lua_settop(L, 1);
|
jbe@397
|
1370 return lua_error(L);
|
jbe/bsw@0
|
1371 } else {
|
jbe@23
|
1372 // return everything but nil error object:
|
jbe@23
|
1373 return lua_gettop(L) - 1;
|
jbe/bsw@0
|
1374 }
|
jbe/bsw@0
|
1375 }
|
jbe/bsw@0
|
1376
|
jbe@23
|
1377 // library function "set_class":
|
jbe/bsw@0
|
1378 static int mondelefant_set_class(lua_State *L) {
|
jbe@23
|
1379 // ensure that first argument is a database result list/object:
|
jbe/bsw@0
|
1380 lua_settop(L, 2);
|
jbe/bsw@0
|
1381 lua_getmetatable(L, 1); // 3
|
jbe/bsw@0
|
1382 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
|
jbe@64
|
1383 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
|
jbe@23
|
1384 // ensure that second argument is a database class (model):
|
jbe/bsw@0
|
1385 lua_settop(L, 2);
|
jbe/bsw@0
|
1386 lua_getmetatable(L, 2); // 3
|
jbe/bsw@0
|
1387 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
|
jbe@64
|
1388 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
|
jbe@23
|
1389 // set attribute "_class" of result list/object to given class:
|
jbe/bsw@0
|
1390 lua_settop(L, 2);
|
jbe/bsw@0
|
1391 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1392 lua_setfield(L, 1, "_class");
|
jbe@23
|
1393 // test, if database result is a list (and not a single object):
|
jbe/bsw@0
|
1394 lua_getfield(L, 1, "_type"); // 3
|
jbe/bsw@0
|
1395 lua_pushliteral(L, "list"); // 4
|
jbe/bsw@0
|
1396 if (lua_rawequal(L, 3, 4)) {
|
jbe/bsw@0
|
1397 int i;
|
jbe@23
|
1398 // set attribute "_class" of all elements to given class:
|
jbe@64
|
1399 for (i=0; i < lua_rawlen(L, 1); i++) {
|
jbe/bsw@0
|
1400 lua_settop(L, 2);
|
jbe/bsw@0
|
1401 lua_rawgeti(L, 1, i+1); // 3
|
jbe/bsw@0
|
1402 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1403 lua_setfield(L, 3, "_class");
|
jbe/bsw@0
|
1404 }
|
jbe/bsw@0
|
1405 }
|
jbe@23
|
1406 // return first argument:
|
jbe/bsw@0
|
1407 lua_settop(L, 1);
|
jbe/bsw@0
|
1408 return 1;
|
jbe/bsw@0
|
1409 }
|
jbe/bsw@0
|
1410
|
jbe@23
|
1411 // library function "new_class":
|
jbe/bsw@0
|
1412 static int mondelefant_new_class(lua_State *L) {
|
jbe@397
|
1413 // if no argument is given, use an empty table:
|
jbe@397
|
1414 if (lua_isnoneornil(L, 1)) {
|
jbe/bsw@0
|
1415 lua_settop(L, 0);
|
jbe/bsw@0
|
1416 lua_newtable(L); // 1
|
jbe@397
|
1417 } else {
|
jbe@397
|
1418 luaL_checktype(L, 1, LUA_TTABLE);
|
jbe@397
|
1419 lua_settop(L, 1);
|
jbe/bsw@0
|
1420 }
|
jbe@23
|
1421 // set meta-table for database classes (models):
|
jbe/bsw@0
|
1422 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 2
|
jbe/bsw@0
|
1423 lua_setmetatable(L, 1);
|
jbe@23
|
1424 // check, if "prototype" attribute is not set:
|
jbe/bsw@0
|
1425 lua_pushliteral(L, "prototype"); // 2
|
jbe/bsw@0
|
1426 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1427 if (!lua_toboolean(L, 2)) {
|
jbe@23
|
1428 // set "prototype" attribute to default prototype:
|
jbe/bsw@0
|
1429 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1430 lua_getfield(L,
|
jbe/bsw@0
|
1431 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1432 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1433 ); // 4
|
jbe/bsw@0
|
1434 lua_rawset(L, 1);
|
jbe/bsw@0
|
1435 }
|
jbe@23
|
1436 // set "object" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1437 lua_settop(L, 1);
|
jbe/bsw@0
|
1438 lua_pushliteral(L, "object"); // 2
|
jbe/bsw@0
|
1439 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1440 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1441 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
1442 lua_newtable(L); // 4
|
jbe/bsw@0
|
1443 lua_rawset(L, 1);
|
jbe/bsw@0
|
1444 }
|
jbe@23
|
1445 // set "object_get" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1446 lua_settop(L, 1);
|
jbe/bsw@0
|
1447 lua_pushliteral(L, "object_get"); // 2
|
jbe/bsw@0
|
1448 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1449 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1450 lua_pushliteral(L, "object_get"); // 3
|
jbe/bsw@0
|
1451 lua_newtable(L); // 4
|
jbe/bsw@0
|
1452 lua_rawset(L, 1);
|
jbe/bsw@0
|
1453 }
|
jbe@23
|
1454 // set "object_set" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1455 lua_settop(L, 1);
|
jbe/bsw@0
|
1456 lua_pushliteral(L, "object_set"); // 2
|
jbe/bsw@0
|
1457 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1458 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1459 lua_pushliteral(L, "object_set"); // 3
|
jbe/bsw@0
|
1460 lua_newtable(L); // 4
|
jbe/bsw@0
|
1461 lua_rawset(L, 1);
|
jbe/bsw@0
|
1462 }
|
jbe@23
|
1463 // set "list" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1464 lua_settop(L, 1);
|
jbe/bsw@0
|
1465 lua_pushliteral(L, "list"); // 2
|
jbe/bsw@0
|
1466 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1467 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1468 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
1469 lua_newtable(L); // 4
|
jbe/bsw@0
|
1470 lua_rawset(L, 1);
|
jbe/bsw@0
|
1471 }
|
jbe@23
|
1472 // set "references" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1473 lua_settop(L, 1);
|
jbe/bsw@0
|
1474 lua_pushliteral(L, "references"); // 2
|
jbe/bsw@0
|
1475 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1476 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1477 lua_pushliteral(L, "references"); // 3
|
jbe/bsw@0
|
1478 lua_newtable(L); // 4
|
jbe/bsw@0
|
1479 lua_rawset(L, 1);
|
jbe/bsw@0
|
1480 }
|
jbe@23
|
1481 // set "foreign_keys" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1482 lua_settop(L, 1);
|
jbe/bsw@0
|
1483 lua_pushliteral(L, "foreign_keys"); // 2
|
jbe/bsw@0
|
1484 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1485 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1486 lua_pushliteral(L, "foreign_keys"); // 3
|
jbe/bsw@0
|
1487 lua_newtable(L); // 4
|
jbe/bsw@0
|
1488 lua_rawset(L, 1);
|
jbe/bsw@0
|
1489 }
|
jbe@23
|
1490 // return table:
|
jbe/bsw@0
|
1491 lua_settop(L, 1);
|
jbe/bsw@0
|
1492 return 1;
|
jbe/bsw@0
|
1493 }
|
jbe/bsw@0
|
1494
|
jbe@23
|
1495 // method "get_reference" of classes (models):
|
jbe/bsw@0
|
1496 static int mondelefant_class_get_reference(lua_State *L) {
|
jbe/bsw@0
|
1497 lua_settop(L, 2);
|
jbe/bsw@0
|
1498 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1499 // get "references" table:
|
jbe/bsw@0
|
1500 lua_getfield(L, 1, "references"); // 3
|
jbe@23
|
1501 // perform lookup:
|
jbe/bsw@0
|
1502 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1503 lua_gettable(L, 3); // 4
|
jbe@23
|
1504 // return result, if lookup was successful:
|
jbe/bsw@0
|
1505 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1506 // replace current table by its prototype:
|
jbe/bsw@0
|
1507 lua_settop(L, 2);
|
jbe/bsw@0
|
1508 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1509 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1510 lua_replace(L, 1);
|
jbe/bsw@0
|
1511 }
|
jbe@23
|
1512 // return nothing:
|
jbe/bsw@0
|
1513 return 0;
|
jbe/bsw@0
|
1514 }
|
jbe/bsw@0
|
1515
|
jbe@23
|
1516 // method "iterate_over_references" of classes (models):
|
jbe/bsw@0
|
1517 static int mondelefant_class_iterate_over_references(lua_State *L) {
|
jbe/bsw@0
|
1518 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
|
jbe/bsw@0
|
1519 }
|
jbe/bsw@0
|
1520
|
jbe@23
|
1521 // method "get_foreign_key_reference_name" of classes (models):
|
jbe/bsw@0
|
1522 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
|
jbe/bsw@0
|
1523 lua_settop(L, 2);
|
jbe/bsw@0
|
1524 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1525 // get "foreign_keys" table:
|
jbe/bsw@0
|
1526 lua_getfield(L, 1, "foreign_keys"); // 3
|
jbe@23
|
1527 // perform lookup:
|
jbe/bsw@0
|
1528 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1529 lua_gettable(L, 3); // 4
|
jbe@23
|
1530 // return result, if lookup was successful:
|
jbe/bsw@0
|
1531 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1532 // replace current table by its prototype:
|
jbe/bsw@0
|
1533 lua_settop(L, 2);
|
jbe/bsw@0
|
1534 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1535 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1536 lua_replace(L, 1);
|
jbe/bsw@0
|
1537 }
|
jbe@23
|
1538 // return nothing:
|
jbe/bsw@0
|
1539 return 0;
|
jbe/bsw@0
|
1540 }
|
jbe/bsw@0
|
1541
|
jbe@23
|
1542 // meta-method "__index" of database result lists and objects:
|
jbe/bsw@0
|
1543 static int mondelefant_result_index(lua_State *L) {
|
jbe/bsw@0
|
1544 const char *result_type;
|
jbe@23
|
1545 // only lookup, when key is a string not beginning with an underscore:
|
jbe/bsw@0
|
1546 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe@23
|
1547 return 0;
|
jbe/bsw@0
|
1548 }
|
jbe@384
|
1549 // value of "_class" attribute or default class on stack position 3:
|
jbe@23
|
1550 lua_settop(L, 2);
|
jbe/bsw@0
|
1551 lua_getfield(L, 1, "_class"); // 3
|
jbe/bsw@0
|
1552 if (!lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1553 lua_settop(L, 2);
|
jbe/bsw@0
|
1554 lua_getfield(L,
|
jbe/bsw@0
|
1555 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1556 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1557 ); // 3
|
jbe/bsw@0
|
1558 }
|
jbe@23
|
1559 // get value of "_type" attribute:
|
jbe/bsw@0
|
1560 lua_getfield(L, 1, "_type"); // 4
|
jbe/bsw@0
|
1561 result_type = lua_tostring(L, 4);
|
jbe@23
|
1562 // different lookup for lists and objects:
|
jbe@23
|
1563 if (result_type && !strcmp(result_type, "object")) { // object
|
jbe/bsw@0
|
1564 lua_settop(L, 3);
|
jbe@384
|
1565 // try inherited attributes, methods or getter functions:
|
jbe@383
|
1566 lua_pushvalue(L, 3); // 4
|
jbe@383
|
1567 while (lua_toboolean(L, 4)) {
|
jbe@383
|
1568 lua_getfield(L, 4, "object"); // 5
|
jbe@383
|
1569 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1570 lua_gettable(L, 5); // 6
|
jbe@383
|
1571 if (!lua_isnil(L, 6)) return 1;
|
jbe@383
|
1572 lua_settop(L, 4);
|
jbe@383
|
1573 lua_getfield(L, 4, "object_get"); // 5
|
jbe@383
|
1574 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1575 lua_gettable(L, 5); // 6
|
jbe@383
|
1576 if (lua_toboolean(L, 6)) {
|
jbe@383
|
1577 lua_pushvalue(L, 1); // 7
|
jbe@383
|
1578 lua_call(L, 1, 1); // 6
|
jbe/bsw@0
|
1579 return 1;
|
jbe/bsw@0
|
1580 }
|
jbe@383
|
1581 lua_settop(L, 4);
|
jbe@383
|
1582 lua_pushliteral(L, "prototype"); // 5
|
jbe@383
|
1583 lua_rawget(L, 4); // 5
|
jbe@383
|
1584 lua_replace(L, 4);
|
jbe/bsw@0
|
1585 }
|
jbe@383
|
1586 lua_settop(L, 3);
|
jbe/bsw@0
|
1587 // try primary keys of referenced objects:
|
jbe/bsw@0
|
1588 lua_pushcfunction(L,
|
jbe/bsw@0
|
1589 mondelefant_class_get_foreign_key_reference_name
|
jbe@383
|
1590 ); // 4
|
jbe@383
|
1591 lua_pushvalue(L, 3); // 5
|
jbe@383
|
1592 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1593 lua_call(L, 2, 1); // 4
|
jbe@383
|
1594 if (!lua_isnil(L, 4)) {
|
jbe@383
|
1595 // reference name at stack position 4
|
jbe@383
|
1596 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
|
jbe@382
|
1597 lua_pushvalue(L, 3); // 6
|
jbe@383
|
1598 lua_pushvalue(L, 4); // 7
|
jbe@383
|
1599 lua_call(L, 2, 1); // reference info at stack position 5
|
jbe@383
|
1600 lua_getfield(L, 1, "_ref"); // 6
|
jbe@383
|
1601 lua_getfield(L, 5, "ref"); // 7
|
jbe@383
|
1602 lua_gettable(L, 6); // 7
|
jbe@383
|
1603 if (!lua_isnil(L, 7)) {
|
jbe@383
|
1604 if (lua_toboolean(L, 7)) {
|
jbe@383
|
1605 lua_getfield(L, 5, "that_key"); // 8
|
jbe@383
|
1606 if (lua_isnil(L, 8)) {
|
jbe/bsw@0
|
1607 return luaL_error(L, "Missing 'that_key' entry in model reference.");
|
jbe/bsw@0
|
1608 }
|
jbe@383
|
1609 lua_gettable(L, 7); // 8
|
jbe/bsw@0
|
1610 } else {
|
jbe/bsw@0
|
1611 lua_pushnil(L);
|
jbe/bsw@0
|
1612 }
|
jbe/bsw@0
|
1613 return 1;
|
jbe/bsw@0
|
1614 }
|
jbe/bsw@0
|
1615 }
|
jbe@383
|
1616 lua_settop(L, 3);
|
jbe@383
|
1617 lua_getfield(L, 1, "_data"); // _data table on stack position 4
|
jbe/bsw@0
|
1618 // try normal data field info:
|
jbe@383
|
1619 lua_pushvalue(L, 2); // 5
|
jbe@383
|
1620 lua_gettable(L, 4); // 5
|
jbe@383
|
1621 if (!lua_isnil(L, 5)) return 1;
|
jbe@383
|
1622 lua_settop(L, 4); // keep _data table on stack
|
jbe/bsw@0
|
1623 // try cached referenced object (or cached NULL reference):
|
jbe@383
|
1624 lua_getfield(L, 1, "_ref"); // 5
|
jbe@383
|
1625 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1626 lua_gettable(L, 5); // 6
|
jbe@383
|
1627 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
|
jbe/bsw@0
|
1628 lua_pushnil(L);
|
jbe/bsw@0
|
1629 return 1;
|
jbe@383
|
1630 } else if (!lua_isnil(L, 6)) {
|
jbe/bsw@0
|
1631 return 1;
|
jbe/bsw@0
|
1632 }
|
jbe@383
|
1633 lua_settop(L, 4);
|
jbe/bsw@0
|
1634 // try to load a referenced object:
|
jbe@383
|
1635 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
|
jbe@383
|
1636 lua_pushvalue(L, 3); // 6
|
jbe@383
|
1637 lua_pushvalue(L, 2); // 7
|
jbe@383
|
1638 lua_call(L, 2, 1); // 5
|
jbe@383
|
1639 if (!lua_isnil(L, 5)) {
|
jbe/bsw@0
|
1640 lua_settop(L, 2);
|
jbe/bsw@0
|
1641 lua_getfield(L, 1, "load"); // 3
|
jbe/bsw@0
|
1642 lua_pushvalue(L, 1); // 4 (self)
|
jbe/bsw@0
|
1643 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1644 lua_call(L, 2, 0);
|
jbe/bsw@0
|
1645 lua_settop(L, 2);
|
jbe/bsw@0
|
1646 lua_getfield(L, 1, "_ref"); // 3
|
jbe/bsw@0
|
1647 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1648 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1649 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
|
jbe/bsw@0
|
1650 return 1;
|
jbe/bsw@0
|
1651 }
|
jbe@383
|
1652 lua_settop(L, 4);
|
jbe@383
|
1653 // try proxy access to document in special column:
|
jbe@383
|
1654 lua_getfield(L, 3, "document_column"); // 5
|
jbe@383
|
1655 if (lua_toboolean(L, 5)) {
|
jbe@383
|
1656 lua_gettable(L, 4); // 5
|
jbe@383
|
1657 if (!lua_isnil(L, 5)) {
|
jbe@383
|
1658 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1659 lua_gettable(L, 5); // 6
|
jbe@383
|
1660 if (!lua_isnil(L, 6)) return 1;
|
jbe@383
|
1661 }
|
jbe@383
|
1662 }
|
jbe/bsw@0
|
1663 return 0;
|
jbe@23
|
1664 } else if (result_type && !strcmp(result_type, "list")) { // list
|
jbe/bsw@0
|
1665 lua_settop(L, 3);
|
jbe/bsw@0
|
1666 // try inherited list attributes or methods:
|
jbe/bsw@0
|
1667 while (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1668 lua_getfield(L, 3, "list"); // 4
|
jbe/bsw@0
|
1669 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1670 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
1671 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
1672 lua_settop(L, 3);
|
jbe/bsw@0
|
1673 lua_pushliteral(L, "prototype"); // 4
|
jbe/bsw@0
|
1674 lua_rawget(L, 3); // 4
|
jbe/bsw@0
|
1675 lua_replace(L, 3);
|
jbe/bsw@0
|
1676 }
|
jbe/bsw@0
|
1677 }
|
jbe@23
|
1678 // return nothing:
|
jbe/bsw@0
|
1679 return 0;
|
jbe/bsw@0
|
1680 }
|
jbe/bsw@0
|
1681
|
jbe@23
|
1682 // meta-method "__newindex" of database result lists and objects:
|
jbe/bsw@0
|
1683 static int mondelefant_result_newindex(lua_State *L) {
|
jbe/bsw@0
|
1684 const char *result_type;
|
jbe@23
|
1685 // perform rawset, unless key is a string not starting with underscore:
|
jbe/bsw@0
|
1686 lua_settop(L, 3);
|
jbe/bsw@0
|
1687 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe/bsw@0
|
1688 lua_rawset(L, 1);
|
jbe/bsw@0
|
1689 return 1;
|
jbe/bsw@0
|
1690 }
|
jbe@384
|
1691 // value of "_class" attribute or default class on stack position 4:
|
jbe@384
|
1692 lua_settop(L, 3);
|
jbe/bsw@0
|
1693 lua_getfield(L, 1, "_class"); // 4
|
jbe/bsw@0
|
1694 if (!lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1695 lua_settop(L, 3);
|
jbe/bsw@0
|
1696 lua_getfield(L,
|
jbe/bsw@0
|
1697 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1698 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1699 ); // 4
|
jbe/bsw@0
|
1700 }
|
jbe@23
|
1701 // get value of "_type" attribute:
|
jbe/bsw@0
|
1702 lua_getfield(L, 1, "_type"); // 5
|
jbe/bsw@0
|
1703 result_type = lua_tostring(L, 5);
|
jbe@378
|
1704 // distinguish between lists and objects:
|
jbe@378
|
1705 if (result_type && !strcmp(result_type, "object")) { // objects
|
jbe@378
|
1706 lua_settop(L, 4);
|
jbe@378
|
1707 // try object setter functions:
|
jbe@384
|
1708 lua_pushvalue(L, 4); // 5
|
jbe@384
|
1709 while (lua_toboolean(L, 5)) {
|
jbe@384
|
1710 lua_getfield(L, 5, "object_set"); // 6
|
jbe@384
|
1711 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1712 lua_gettable(L, 6); // 7
|
jbe@384
|
1713 if (lua_toboolean(L, 7)) {
|
jbe@384
|
1714 lua_pushvalue(L, 1); // 8
|
jbe@384
|
1715 lua_pushvalue(L, 3); // 9
|
jbe@378
|
1716 lua_call(L, 2, 0);
|
jbe@378
|
1717 return 0;
|
jbe@378
|
1718 }
|
jbe@384
|
1719 lua_settop(L, 5);
|
jbe@384
|
1720 lua_pushliteral(L, "prototype"); // 6
|
jbe@384
|
1721 lua_rawget(L, 5); // 6
|
jbe@384
|
1722 lua_replace(L, 5);
|
jbe@378
|
1723 }
|
jbe@384
|
1724 lua_settop(L, 4);
|
jbe@384
|
1725 lua_getfield(L, 1, "_data"); // _data table on stack position 5
|
jbe/bsw@0
|
1726 // check, if a object reference is changed:
|
jbe@384
|
1727 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
|
jbe@384
|
1728 lua_pushvalue(L, 4); // 7
|
jbe@384
|
1729 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1730 lua_call(L, 2, 1); // 6
|
jbe@384
|
1731 if (!lua_isnil(L, 6)) {
|
jbe/bsw@0
|
1732 // store object in _ref table (use false for nil): // TODO: use special object instead of false
|
jbe@384
|
1733 lua_getfield(L, 1, "_ref"); // 7
|
jbe@384
|
1734 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1735 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
|
jbe@384
|
1736 else lua_pushvalue(L, 3); // 9
|
jbe@384
|
1737 lua_settable(L, 7);
|
jbe@384
|
1738 lua_settop(L, 6);
|
jbe/bsw@0
|
1739 // delete referencing key from _data table:
|
jbe@384
|
1740 lua_getfield(L, 6, "this_key"); // 7
|
jbe@384
|
1741 if (lua_isnil(L, 7)) {
|
jbe/bsw@0
|
1742 return luaL_error(L, "Missing 'this_key' entry in model reference.");
|
jbe/bsw@0
|
1743 }
|
jbe@384
|
1744 lua_pushvalue(L, 7); // 8
|
jbe@384
|
1745 lua_pushnil(L); // 9
|
jbe@384
|
1746 lua_settable(L, 5);
|
jbe@384
|
1747 lua_getfield(L, 1, "_dirty"); // 8
|
jbe@384
|
1748 lua_pushvalue(L, 7); // 9
|
jbe@384
|
1749 lua_pushboolean(L, 1); // 10
|
jbe@384
|
1750 lua_settable(L, 8);
|
jbe@384
|
1751 return 0;
|
jbe@384
|
1752 }
|
jbe@384
|
1753 lua_settop(L, 5);
|
jbe@384
|
1754 // check proxy access to document in special column:
|
jbe@384
|
1755 lua_getfield(L, 4, "document_column"); // 6
|
jbe@384
|
1756 if (lua_toboolean(L, 6)) {
|
jbe@384
|
1757 lua_getfield(L, 1, "_column_info"); // 7
|
jbe@384
|
1758 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1759 lua_gettable(L, 7); // 8
|
jbe@400
|
1760 if (!lua_toboolean(L, 8)) {
|
jbe@384
|
1761 lua_settop(L, 6);
|
jbe@384
|
1762 lua_gettable(L, 5); // 6
|
jbe@384
|
1763 if (lua_isnil(L, 6)) {
|
jbe@384
|
1764 return luaL_error(L, "Cannot write to document column: document is nil");
|
jbe@384
|
1765 }
|
jbe@384
|
1766 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1767 lua_pushvalue(L, 3); // 8
|
jbe@384
|
1768 lua_settable(L, 6);
|
jbe@384
|
1769 return 0;
|
jbe@384
|
1770 }
|
jbe@384
|
1771 }
|
jbe@384
|
1772 lua_settop(L, 5);
|
jbe@384
|
1773 // store value in data field info:
|
jbe@384
|
1774 lua_pushvalue(L, 2); // 6
|
jbe@384
|
1775 lua_pushvalue(L, 3); // 7
|
jbe@384
|
1776 lua_settable(L, 5);
|
jbe@384
|
1777 lua_settop(L, 4);
|
jbe@384
|
1778 // mark field as dirty (needs to be UPDATEd on save):
|
jbe@384
|
1779 lua_getfield(L, 1, "_dirty"); // 5
|
jbe@384
|
1780 lua_pushvalue(L, 2); // 6
|
jbe@384
|
1781 lua_pushboolean(L, 1); // 7
|
jbe@384
|
1782 lua_settable(L, 5);
|
jbe@384
|
1783 lua_settop(L, 4);
|
jbe@384
|
1784 // reset reference cache, if neccessary:
|
jbe@384
|
1785 lua_pushcfunction(L,
|
jbe@384
|
1786 mondelefant_class_get_foreign_key_reference_name
|
jbe@384
|
1787 ); // 5
|
jbe@384
|
1788 lua_pushvalue(L, 4); // 6
|
jbe@384
|
1789 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1790 lua_call(L, 2, 1); // 5
|
jbe@384
|
1791 if (!lua_isnil(L, 5)) {
|
jbe@384
|
1792 lua_getfield(L, 1, "_ref"); // 6
|
jbe@382
|
1793 lua_pushvalue(L, 5); // 7
|
jbe@382
|
1794 lua_pushnil(L); // 8
|
jbe@382
|
1795 lua_settable(L, 6);
|
jbe/bsw@0
|
1796 }
|
jbe/bsw@0
|
1797 return 0;
|
jbe@23
|
1798 } else { // non-objects (i.e. lists)
|
jbe@23
|
1799 // perform rawset:
|
jbe/bsw@0
|
1800 lua_settop(L, 3);
|
jbe/bsw@0
|
1801 lua_rawset(L, 1);
|
jbe/bsw@0
|
1802 return 0;
|
jbe/bsw@0
|
1803 }
|
jbe/bsw@0
|
1804 }
|
jbe/bsw@0
|
1805
|
jbe@23
|
1806 // meta-method "__index" of classes (models):
|
jbe/bsw@0
|
1807 static int mondelefant_class_index(lua_State *L) {
|
jbe@23
|
1808 // perform lookup in prototype:
|
jbe/bsw@0
|
1809 lua_settop(L, 2);
|
jbe/bsw@0
|
1810 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1811 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1812 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1813 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1814 return 1;
|
jbe/bsw@0
|
1815 }
|
jbe/bsw@0
|
1816
|
jbe@23
|
1817 // registration information for functions of library:
|
jbe/bsw@0
|
1818 static const struct luaL_Reg mondelefant_module_functions[] = {
|
jbe/bsw@0
|
1819 {"connect", mondelefant_connect},
|
jbe/bsw@0
|
1820 {"set_class", mondelefant_set_class},
|
jbe/bsw@0
|
1821 {"new_class", mondelefant_new_class},
|
jbe/bsw@0
|
1822 {NULL, NULL}
|
jbe/bsw@0
|
1823 };
|
jbe/bsw@0
|
1824
|
jbe@23
|
1825 // registration information for meta-methods of database connections:
|
jbe/bsw@0
|
1826 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
|
jbe/bsw@0
|
1827 {"__gc", mondelefant_conn_free},
|
jbe/bsw@0
|
1828 {"__index", mondelefant_conn_index},
|
jbe/bsw@0
|
1829 {"__newindex", mondelefant_conn_newindex},
|
jbe/bsw@0
|
1830 {NULL, NULL}
|
jbe/bsw@0
|
1831 };
|
jbe/bsw@0
|
1832
|
jbe@23
|
1833 // registration information for methods of database connections:
|
jbe/bsw@0
|
1834 static const struct luaL_Reg mondelefant_conn_methods[] = {
|
jbe/bsw@0
|
1835 {"close", mondelefant_conn_close},
|
jbe/bsw@0
|
1836 {"is_ok", mondelefant_conn_is_ok},
|
jbe/bsw@0
|
1837 {"get_transaction_status", mondelefant_conn_get_transaction_status},
|
jbe@397
|
1838 {"try_wait", mondelefant_conn_try_wait},
|
jbe@393
|
1839 {"wait", mondelefant_conn_wait},
|
jbe/bsw@0
|
1840 {"create_list", mondelefant_conn_create_list},
|
jbe/bsw@0
|
1841 {"create_object", mondelefant_conn_create_object},
|
jbe/bsw@0
|
1842 {"quote_string", mondelefant_conn_quote_string},
|
jbe/bsw@0
|
1843 {"quote_binary", mondelefant_conn_quote_binary},
|
jbe/bsw@0
|
1844 {"assemble_command", mondelefant_conn_assemble_command},
|
jbe/bsw@0
|
1845 {"try_query", mondelefant_conn_try_query},
|
jbe/bsw@0
|
1846 {"query", mondelefant_conn_query},
|
jbe/bsw@0
|
1847 {NULL, NULL}
|
jbe/bsw@0
|
1848 };
|
jbe/bsw@0
|
1849
|
jbe@23
|
1850 // registration information for meta-methods of error objects:
|
jbe/bsw@0
|
1851 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
|
jbe/bsw@0
|
1852 {NULL, NULL}
|
jbe/bsw@0
|
1853 };
|
jbe/bsw@0
|
1854
|
jbe@23
|
1855 // registration information for methods of error objects:
|
jbe/bsw@0
|
1856 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
|
jbe@397
|
1857 {"escalate", lua_error},
|
jbe/bsw@0
|
1858 {"is_kind_of", mondelefant_errorobject_is_kind_of},
|
jbe/bsw@0
|
1859 {NULL, NULL}
|
jbe/bsw@0
|
1860 };
|
jbe/bsw@0
|
1861
|
jbe@23
|
1862 // registration information for meta-methods of database result lists/objects:
|
jbe/bsw@0
|
1863 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
|
jbe/bsw@0
|
1864 {"__index", mondelefant_result_index},
|
jbe/bsw@0
|
1865 {"__newindex", mondelefant_result_newindex},
|
jbe/bsw@0
|
1866 {NULL, NULL}
|
jbe/bsw@0
|
1867 };
|
jbe/bsw@0
|
1868
|
jbe@23
|
1869 // registration information for methods of database result lists/objects:
|
jbe/bsw@0
|
1870 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
|
jbe/bsw@0
|
1871 {"__index", mondelefant_class_index},
|
jbe/bsw@0
|
1872 {NULL, NULL}
|
jbe/bsw@0
|
1873 };
|
jbe/bsw@0
|
1874
|
jbe@23
|
1875 // registration information for methods of classes (models):
|
jbe/bsw@0
|
1876 static const struct luaL_Reg mondelefant_class_methods[] = {
|
jbe/bsw@0
|
1877 {"get_reference", mondelefant_class_get_reference},
|
jbe/bsw@0
|
1878 {"iterate_over_references", mondelefant_class_iterate_over_references},
|
jbe/bsw@0
|
1879 {"get_foreign_key_reference_name",
|
jbe/bsw@0
|
1880 mondelefant_class_get_foreign_key_reference_name},
|
jbe/bsw@0
|
1881 {NULL, NULL}
|
jbe/bsw@0
|
1882 };
|
jbe/bsw@0
|
1883
|
jbe@23
|
1884 // registration information for methods of database result objects (not lists!):
|
jbe/bsw@0
|
1885 static const struct luaL_Reg mondelefant_object_methods[] = {
|
jbe/bsw@0
|
1886 {NULL, NULL}
|
jbe/bsw@0
|
1887 };
|
jbe/bsw@0
|
1888
|
jbe@23
|
1889 // registration information for methods of database result lists (not single objects!):
|
jbe/bsw@0
|
1890 static const struct luaL_Reg mondelefant_list_methods[] = {
|
jbe/bsw@0
|
1891 {NULL, NULL}
|
jbe/bsw@0
|
1892 };
|
jbe/bsw@0
|
1893
|
jbe@23
|
1894 // luaopen function to initialize/register library:
|
jbe/bsw@0
|
1895 int luaopen_mondelefant_native(lua_State *L) {
|
jbe/bsw@0
|
1896 lua_settop(L, 0);
|
jbe/bsw@0
|
1897 lua_newtable(L); // module at stack position 1
|
jbe@64
|
1898 luaL_setfuncs(L, mondelefant_module_functions, 0);
|
jbe/bsw@0
|
1899
|
jbe/bsw@0
|
1900 lua_pushvalue(L, 1); // 2
|
jbe/bsw@0
|
1901 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
|
jbe/bsw@0
|
1902
|
jbe/bsw@0
|
1903 lua_newtable(L); // 2
|
jbe/bsw@0
|
1904 // NOTE: only PostgreSQL is supported yet:
|
jbe@64
|
1905 luaL_setfuncs(L, mondelefant_conn_methods, 0);
|
jbe/bsw@0
|
1906 lua_setfield(L, 1, "postgresql_connection_prototype");
|
jbe/bsw@0
|
1907 lua_newtable(L); // 2
|
jbe/bsw@0
|
1908 lua_setfield(L, 1, "connection_prototype");
|
jbe/bsw@0
|
1909
|
jbe/bsw@0
|
1910 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
|
jbe@64
|
1911 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
|
jbe/bsw@0
|
1912 lua_settop(L, 1);
|
jbe/bsw@0
|
1913 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
|
jbe@64
|
1914 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
|
jbe/bsw@0
|
1915 lua_setfield(L, 1, "result_metatable");
|
jbe/bsw@0
|
1916 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
|
jbe@64
|
1917 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
|
jbe/bsw@0
|
1918 lua_setfield(L, 1, "class_metatable");
|
jbe/bsw@0
|
1919
|
jbe/bsw@0
|
1920 lua_newtable(L); // 2
|
jbe@272
|
1921 luaL_setfuncs(L, mondelefant_class_methods, 0);
|
jbe/bsw@0
|
1922 lua_newtable(L); // 3
|
jbe@64
|
1923 luaL_setfuncs(L, mondelefant_object_methods, 0);
|
jbe/bsw@0
|
1924 lua_setfield(L, 2, "object");
|
jbe/bsw@0
|
1925 lua_newtable(L); // 3
|
jbe/bsw@0
|
1926 lua_setfield(L, 2, "object_get");
|
jbe/bsw@0
|
1927 lua_newtable(L); // 3
|
jbe/bsw@0
|
1928 lua_setfield(L, 2, "object_set");
|
jbe/bsw@0
|
1929 lua_newtable(L); // 3
|
jbe@64
|
1930 luaL_setfuncs(L, mondelefant_list_methods, 0);
|
jbe/bsw@0
|
1931 lua_setfield(L, 2, "list");
|
jbe/bsw@0
|
1932 lua_newtable(L); // 3
|
jbe/bsw@0
|
1933 lua_setfield(L, 2, "references");
|
jbe/bsw@0
|
1934 lua_newtable(L); // 3
|
jbe/bsw@0
|
1935 lua_setfield(L, 2, "foreign_keys");
|
jbe/bsw@0
|
1936 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1937 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
|
jbe/bsw@0
|
1938 lua_setfield(L, 1, "class_prototype");
|
jbe/bsw@0
|
1939
|
jbe/bsw@0
|
1940 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
|
jbe@64
|
1941 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
|
jbe/bsw@0
|
1942 lua_newtable(L); // 3
|
jbe@64
|
1943 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
|
jbe/bsw@0
|
1944 lua_setfield(L, 2, "__index");
|
jbe/bsw@0
|
1945 lua_setfield(L, 1, "errorobject_metatable");
|
jbe/bsw@0
|
1946
|
jbe/bsw@0
|
1947 return 1;
|
jbe/bsw@0
|
1948 }
|