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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/bsw@0
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7
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jbe@23
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8 // NOTE: Comments with format "// <number>" denote the Lua stack position
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jbe@23
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9
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jbe@23
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10 // prefix for all Lua registry entries of this library:
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jbe@23
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11 #define MONDELEFANT_REGKEY "e449ba8d9a53d353_mondelefant_"
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jbe/bsw@0
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12
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jbe@23
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13 // registry key of module "mondelefant_native":
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jbe@23
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14 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
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jbe@23
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15 // registry key of meta-table for database connections:
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jbe@23
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16 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
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jbe@23
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17 // registry key of table storing connection specific data:
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jbe@23
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18 #define MONDELEFANT_CONN_DATA_REGKEY (MONDELEFANT_REGKEY "connection_data")
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jbe@23
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19 // registry key of meta-table for database result lists and objects:
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jbe@23
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20 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
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jbe@23
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21 // registry key of meta-table for database error objects:
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jbe@23
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22 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
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jbe@23
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23 // registry key of meta-table for models (named classes here):
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jbe@23
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24 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
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jbe@23
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25 // registry key of default prototype for models/classes:
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jbe@23
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26 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
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jbe/bsw@0
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27
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jbe@23
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28 // C-structure for database connection userdata:
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jbe/bsw@0
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29 typedef struct {
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jbe/bsw@0
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30 PGconn *pgconn;
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jbe/bsw@0
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31 int server_encoding;
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jbe/bsw@0
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32 } mondelefant_conn_t;
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jbe@23
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33 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
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jbe@23
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34 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
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jbe/bsw@0
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35
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jbe@23
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36 // transform codepoint-position to byte-position for a given UTF-8 string:
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jbe/bsw@0
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37 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
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jbe/bsw@0
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38 size_t bytepos;
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jbe/bsw@0
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39 for (bytepos = 0; utf8pos > 0; bytepos++) {
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jbe/bsw@0
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40 uint8_t c;
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jbe/bsw@0
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41 c = ((const uint8_t *)str)[bytepos];
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jbe/bsw@0
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42 if (!c) break;
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jbe/bsw@0
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43 if (c <= 0x7f || c >= 0xc0) utf8pos--;
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jbe/bsw@0
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44 }
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jbe/bsw@0
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45 return bytepos;
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jbe/bsw@0
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46 }
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jbe/bsw@0
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47
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jbe@23
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48 // PostgreSQL's OID for binary data type (bytea):
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jbe/bsw@0
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49 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
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jbe/bsw@0
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50
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jbe@23
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51 // mapping a PostgreSQL type given by its OID to a string identifier:
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jbe/bsw@0
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52 static const char *mondelefant_oid_to_typestr(Oid oid) {
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jbe/bsw@0
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53 switch (oid) {
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jbe/bsw@0
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54 case 16: return "bool";
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jbe/bsw@0
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55 case 17: return "bytea";
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jbe/bsw@0
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56 case 18: return "char";
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jbe/bsw@0
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57 case 19: return "name";
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jbe/bsw@0
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58 case 20: return "int8";
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jbe/bsw@0
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59 case 21: return "int2";
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jbe/bsw@0
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60 case 23: return "int4";
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jbe/bsw@0
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61 case 25: return "text";
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jbe/bsw@0
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62 case 26: return "oid";
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jbe/bsw@0
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63 case 27: return "tid";
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jbe/bsw@0
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64 case 28: return "xid";
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jbe/bsw@0
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65 case 29: return "cid";
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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/bsw@0
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91 default: return NULL;
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jbe/bsw@0
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92 }
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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@23
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95 // This library maps PostgreSQL's error codes to CamelCase string
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jbe@23
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96 // identifiers, which consist of CamelCase identifiers and are seperated
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jbe@23
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97 // by dots (".") (no leading or trailing dots).
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jbe@23
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98 // There are additional error identifiers which do not have a corresponding
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jbe@23
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99 // PostgreSQL error associated with it.
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jbe@23
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100
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jbe@23
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101 // matching start of local variable 'pgcode' against string 'incode',
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jbe@23
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102 // returning string 'outcode' on match:
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jbe/bsw@0
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103 #define mondelefant_errcode_item(incode, outcode) \
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jbe/bsw@0
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104 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
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jbe/bsw@0
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105
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jbe@23
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106 // additional error identifiers without corresponding PostgreSQL error:
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jbe/bsw@0
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107 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
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jbe/bsw@0
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108 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
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jbe/bsw@0
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109 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
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jbe/bsw@0
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110 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
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jbe/bsw@0
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111 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
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jbe/bsw@0
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112 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
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jbe/bsw@0
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113
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jbe@23
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114 // mapping PostgreSQL error code to error code as returned by this library:
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jbe/bsw@0
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115 static const char *mondelefant_translate_errcode(const char *pgcode) {
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jbe/bsw@0
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116 if (!pgcode) abort(); // should not happen
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jbe/bsw@0
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117 mondelefant_errcode_item("02", "NoData")
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jbe/bsw@0
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118 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
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jbe/bsw@0
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119 mondelefant_errcode_item("08", "ConnectionException")
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jbe/bsw@0
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120 mondelefant_errcode_item("09", "TriggeredActionException")
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jbe/bsw@0
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121 mondelefant_errcode_item("0A", "FeatureNotSupported")
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jbe/bsw@0
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122 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
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jbe/bsw@0
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123 mondelefant_errcode_item("0F", "LocatorException")
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jbe/bsw@0
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124 mondelefant_errcode_item("0L", "InvalidGrantor")
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jbe/bsw@0
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125 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
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jbe/bsw@0
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126 mondelefant_errcode_item("21", "CardinalityViolation")
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jbe/bsw@0
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127 mondelefant_errcode_item("22", "DataException")
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jbe/bsw@0
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128 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
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jbe/bsw@0
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129 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
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jbe/bsw@0
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130 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
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jbe/bsw@0
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131 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
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jbe/bsw@0
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132 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
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jbe/bsw@0
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133 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
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jbe/bsw@0
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134 mondelefant_errcode_item("24", "InvalidCursorState")
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jbe/bsw@0
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135 mondelefant_errcode_item("25", "InvalidTransactionState")
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jbe/bsw@0
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136 mondelefant_errcode_item("26", "InvalidSqlStatementName")
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jbe/bsw@0
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137 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
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jbe/bsw@0
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138 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
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jbe/bsw@0
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139 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
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jbe/bsw@0
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140 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
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jbe/bsw@0
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141 mondelefant_errcode_item("2F", "SqlRoutineException")
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jbe/bsw@0
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142 mondelefant_errcode_item("34", "InvalidCursorName")
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jbe/bsw@0
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143 mondelefant_errcode_item("38", "ExternalRoutineException")
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jbe/bsw@0
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144 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
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jbe/bsw@0
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145 mondelefant_errcode_item("3B", "SavepointException")
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jbe/bsw@0
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146 mondelefant_errcode_item("3D", "InvalidCatalogName")
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jbe/bsw@0
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147 mondelefant_errcode_item("3F", "InvalidSchemaName")
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jbe/bsw@0
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148 mondelefant_errcode_item("40", "TransactionRollback")
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jbe/bsw@0
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149 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
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jbe/bsw@0
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150 mondelefant_errcode_item("44", "WithCheckOptionViolation")
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jbe/bsw@0
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151 mondelefant_errcode_item("53", "InsufficientResources")
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jbe/bsw@0
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152 mondelefant_errcode_item("54", "ProgramLimitExceeded")
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jbe/bsw@0
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153 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
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jbe/bsw@0
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154 mondelefant_errcode_item("57", "OperatorIntervention")
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jbe/bsw@0
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155 mondelefant_errcode_item("58", "SystemError")
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jbe/bsw@0
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156 mondelefant_errcode_item("F0", "ConfigurationFileError")
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jbe/bsw@0
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157 mondelefant_errcode_item("P0", "PlpgsqlError")
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jbe/bsw@0
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158 mondelefant_errcode_item("XX", "InternalError")
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jbe/bsw@0
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159 return "unknown";
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jbe/bsw@0
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160 }
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jbe/bsw@0
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161
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jbe@23
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162 // C-function, checking if a given error code (as defined by this library)
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jbe@23
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163 // is belonging to a certain class of errors (strings are equal or error
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jbe@23
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164 // code begins with error class followed by a dot):
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jbe/bsw@0
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165 static int mondelefant_check_error_class(
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jbe/bsw@0
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166 const char *errcode, const char *errclass
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jbe/bsw@0
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167 ) {
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jbe/bsw@0
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168 size_t i = 0;
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jbe/bsw@0
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169 while (1) {
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jbe/bsw@0
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170 if (errclass[i] == 0) {
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jbe/bsw@0
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171 if (errcode[i] == 0 || errcode[i] == '.') return 1;
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jbe/bsw@0
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172 else return 0;
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jbe/bsw@0
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173 }
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jbe/bsw@0
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174 if (errcode[i] != errclass[i]) return 0;
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jbe/bsw@0
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175 i++;
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jbe/bsw@0
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176 }
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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@23
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179 // 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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180 static void mondelefant_push_first_line(lua_State *L, const char *str) {
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jbe/bsw@0
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181 char *str2;
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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 str2 = strdup(str);
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jbe/bsw@0
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185 while (1) {
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jbe/bsw@0
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186 char c = str2[i];
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jbe/bsw@0
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187 if (c == '\n' || c == '\r' || c == 0) { str2[i] = 0; break; }
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jbe/bsw@0
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188 i++;
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jbe/bsw@0
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189 };
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jbe/bsw@0
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190 lua_pushstring(L, str2);
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jbe/bsw@0
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191 free(str2);
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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@23
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201 // if engine is anything but "postgresql", then raise error:
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jbe/bsw@0
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202 lua_settop(L, 1);
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jbe/bsw@0
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203 lua_getfield(L, 1, "engine"); // 2
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jbe/bsw@0
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204 if (!lua_toboolean(L, 2)) {
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jbe/bsw@0
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205 return luaL_error(L, "No database engine selected.");
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jbe/bsw@0
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206 }
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jbe/bsw@0
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207 lua_pushliteral(L, "postgresql"); // 3
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jbe/bsw@0
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208 if (!lua_rawequal(L, 2, 3)) {
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jbe/bsw@0
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209 return luaL_error(L,
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jbe/bsw@0
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210 "Only database engine 'postgresql' is supported."
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jbe/bsw@0
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211 );
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jbe/bsw@0
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212 }
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jbe@23
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213 // create 'conninfo' string for PQconnectdb function, which contains all
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jbe@23
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214 // options except "engine" option:
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jbe/bsw@0
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215 lua_settop(L, 1);
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jbe/bsw@0
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216 lua_pushnil(L); // slot for key at stack position 2
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jbe/bsw@0
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217 lua_pushnil(L); // slot for value at stack position 3
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jbe/bsw@0
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218 luaL_buffinit(L, &buf);
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jbe/bsw@0
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219 {
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jbe/bsw@0
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220 int need_seperator = 0;
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jbe/bsw@0
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221 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
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jbe/bsw@0
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222 lua_replace(L, 3);
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jbe/bsw@0
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223 lua_replace(L, 2);
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jbe/bsw@0
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224 // NOTE: numbers will be converted to strings automatically here,
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jbe/bsw@0
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225 // but perhaps this will change in future versions of lua
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jbe/bsw@0
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226 luaL_argcheck(L,
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jbe/bsw@0
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227 lua_isstring(L, 2) && lua_isstring(L, 3), 1, "non-string contained"
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jbe/bsw@0
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228 );
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jbe/bsw@0
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229 lua_pushvalue(L, 2);
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jbe/bsw@0
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230 lua_pushliteral(L, "engine");
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jbe/bsw@0
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231 if (!lua_rawequal(L, -2, -1)) {
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jbe/bsw@0
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232 const char *value;
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jbe/bsw@0
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233 size_t value_len;
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jbe/bsw@0
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234 size_t value_pos = 0;
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jbe/bsw@0
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235 lua_pop(L, 1);
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jbe/bsw@0
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236 if (need_seperator) luaL_addchar(&buf, ' ');
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jbe/bsw@0
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237 luaL_addvalue(&buf);
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jbe/bsw@0
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238 luaL_addchar(&buf, '=');
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jbe/bsw@0
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239 luaL_addchar(&buf, '\'');
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jbe/bsw@0
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240 value = lua_tolstring(L, 3, &value_len);
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jbe/bsw@0
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241 do {
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jbe/bsw@0
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242 char c;
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jbe/bsw@0
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243 c = value[value_pos++];
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jbe/bsw@0
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244 if (c == '\'') luaL_addchar(&buf, '\\');
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jbe/bsw@0
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245 luaL_addchar(&buf, c);
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jbe/bsw@0
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246 } while (value_pos < value_len);
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jbe/bsw@0
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247 luaL_addchar(&buf, '\'');
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jbe/bsw@0
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248 need_seperator = 1;
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jbe/bsw@0
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249 } else {
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jbe/bsw@0
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250 lua_pop(L, 1);
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jbe/bsw@0
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251 }
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jbe/bsw@0
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252 }
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jbe/bsw@0
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253 }
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jbe/bsw@0
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254 luaL_pushresult(&buf);
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jbe/bsw@0
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255 lua_replace(L, 2);
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jbe/bsw@0
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256 lua_settop(L, 2);
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jbe/bsw@0
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257 conninfo = lua_tostring(L, 2);
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jbe@23
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258 // call PQconnectdb function of libpq:
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jbe/bsw@0
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259 pgconn = PQconnectdb(conninfo);
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jbe@23
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260 // throw errors, if neccessary:
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jbe/bsw@0
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261 if (!pgconn) {
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jbe/bsw@0
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262 return luaL_error(L,
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jbe/bsw@0
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263 "Error in libpq while creating 'PGconn' structure."
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jbe/bsw@0
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264 );
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jbe/bsw@0
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265 }
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jbe/bsw@0
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266 if (PQstatus(pgconn) != CONNECTION_OK) {
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jbe/bsw@0
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267 const char *errmsg;
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jbe/bsw@0
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268 lua_pushnil(L);
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jbe/bsw@0
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269 errmsg = PQerrorMessage(pgconn);
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jbe/bsw@0
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270 if (errmsg) {
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jbe/bsw@0
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271 mondelefant_push_first_line(L, errmsg);
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jbe/bsw@0
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272 } else {
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jbe/bsw@0
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273 lua_pushliteral(L,
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jbe/bsw@0
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274 "Error while connecting to database, but no error message given."
|
jbe/bsw@0
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275 );
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jbe/bsw@0
|
276 }
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jbe/bsw@0
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277 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
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jbe/bsw@0
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278 PQfinish(pgconn);
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jbe/bsw@0
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279 return 3;
|
jbe/bsw@0
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280 }
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jbe@23
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281 // create userdata:
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jbe/bsw@0
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282 lua_settop(L, 0);
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jbe/bsw@0
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283 conn = lua_newuserdata(L, sizeof(*conn)); // 1
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jbe@23
|
284 // set 'pgconn' in C-struct of userdata:
|
jbe/bsw@0
|
285 conn->pgconn = pgconn;
|
jbe@23
|
286 // set 'server_encoding' in C-struct of userdata:
|
jbe/bsw@0
|
287 {
|
jbe/bsw@0
|
288 const char *charset;
|
jbe/bsw@0
|
289 charset = PQparameterStatus(pgconn, "server_encoding");
|
jbe/bsw@0
|
290 if (charset && !strcmp(charset, "UTF8")) {
|
jbe/bsw@0
|
291 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
|
jbe/bsw@0
|
292 } else {
|
jbe/bsw@0
|
293 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
|
jbe/bsw@0
|
294 }
|
jbe/bsw@0
|
295 }
|
jbe@23
|
296 // set meta-table of userdata:
|
jbe/bsw@0
|
297 luaL_getmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
|
jbe/bsw@0
|
298 lua_setmetatable(L, 1);
|
jbe@23
|
299 // create entry in table storing connection specific data and associate
|
jbe@23
|
300 // created userdata with it:
|
jbe/bsw@0
|
301 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 2
|
jbe/bsw@0
|
302 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
303 lua_newtable(L); // 4
|
jbe/bsw@0
|
304 lua_settable(L, 2);
|
jbe/bsw@0
|
305 lua_settop(L, 1);
|
jbe@23
|
306 // store key "engine" with value "postgresql" as connection specific data:
|
jbe/bsw@0
|
307 lua_pushliteral(L, "postgresql");
|
jbe/bsw@0
|
308 lua_setfield(L, 1, "engine");
|
jbe@23
|
309 // return userdata:
|
jbe/bsw@0
|
310 return 1;
|
jbe/bsw@0
|
311 }
|
jbe/bsw@0
|
312
|
jbe@23
|
313 // returns pointer to libpq handle 'pgconn' of userdata at given index
|
jbe@23
|
314 // (or throws error, if database connection has been closed):
|
jbe/bsw@0
|
315 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
|
jbe/bsw@0
|
316 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
317 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
|
jbe/bsw@0
|
318 if (!conn->pgconn) {
|
jbe/bsw@0
|
319 luaL_error(L, "PostgreSQL connection has been closed.");
|
jbe/bsw@0
|
320 return NULL;
|
jbe/bsw@0
|
321 }
|
jbe/bsw@0
|
322 return conn;
|
jbe/bsw@0
|
323 }
|
jbe/bsw@0
|
324
|
jbe@23
|
325 // meta-method "__index" of database handles (userdata):
|
jbe/bsw@0
|
326 static int mondelefant_conn_index(lua_State *L) {
|
jbe@23
|
327 // try table for connection specific data:
|
jbe/bsw@0
|
328 lua_settop(L, 2);
|
jbe/bsw@0
|
329 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 3
|
jbe/bsw@0
|
330 lua_pushvalue(L, 1); // 4
|
jbe/bsw@0
|
331 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
332 lua_remove(L, 3); // connection specific data-table at stack position 3
|
jbe/bsw@0
|
333 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
334 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
335 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
336 // try to use prototype stored in connection specific data:
|
jbe/bsw@0
|
337 lua_settop(L, 3);
|
jbe/bsw@0
|
338 lua_getfield(L, 3, "prototype"); // 4
|
jbe/bsw@0
|
339 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
340 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
341 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
342 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
343 }
|
jbe@23
|
344 // try to use "postgresql_connection_prototype" of library:
|
jbe/bsw@0
|
345 lua_settop(L, 2);
|
jbe/bsw@0
|
346 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
|
jbe/bsw@0
|
347 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
|
jbe/bsw@0
|
348 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
349 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
350 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
351 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
352 }
|
jbe@23
|
353 // try to use "connection_prototype" of library:
|
jbe/bsw@0
|
354 lua_settop(L, 3);
|
jbe/bsw@0
|
355 lua_getfield(L, 3, "connection_prototype"); // 4
|
jbe/bsw@0
|
356 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
357 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
358 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
359 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
360 }
|
jbe@23
|
361 // give up and return nothing:
|
jbe/bsw@0
|
362 return 0;
|
jbe/bsw@0
|
363 }
|
jbe/bsw@0
|
364
|
jbe@23
|
365 // meta-method "__newindex" of database handles (userdata):
|
jbe/bsw@0
|
366 static int mondelefant_conn_newindex(lua_State *L) {
|
jbe@23
|
367 // store key-value pair in table for connection specific data:
|
jbe/bsw@0
|
368 lua_settop(L, 3);
|
jbe/bsw@0
|
369 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY); // 4
|
jbe/bsw@0
|
370 lua_pushvalue(L, 1); // 5
|
jbe/bsw@0
|
371 lua_gettable(L, 4); // 5
|
jbe@23
|
372 lua_remove(L, 4); // connection specific data-table at stack position 4
|
jbe/bsw@0
|
373 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
374 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
375 lua_settable(L, 4);
|
jbe@23
|
376 // return nothing:
|
jbe/bsw@0
|
377 return 0;
|
jbe/bsw@0
|
378 }
|
jbe/bsw@0
|
379
|
jbe@23
|
380 // meta-method "__gc" of database handles:
|
jbe/bsw@0
|
381 static int mondelefant_conn_free(lua_State *L) {
|
jbe/bsw@0
|
382 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
383 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe/bsw@0
|
384 if (conn->pgconn) PQfinish(conn->pgconn);
|
jbe/bsw@0
|
385 conn->pgconn = NULL;
|
jbe/bsw@0
|
386 return 0;
|
jbe/bsw@0
|
387 }
|
jbe/bsw@0
|
388
|
jbe@23
|
389 // method "close" of database handles:
|
jbe/bsw@0
|
390 static int mondelefant_conn_close(lua_State *L) {
|
jbe/bsw@0
|
391 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
392 lua_settop(L, 1);
|
jbe/bsw@0
|
393 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
394 PQfinish(conn->pgconn);
|
jbe/bsw@0
|
395 conn->pgconn = NULL;
|
jbe/bsw@0
|
396 return 0;
|
jbe/bsw@0
|
397 }
|
jbe/bsw@0
|
398
|
jbe@23
|
399 // method "is_okay" of database handles:
|
jbe/bsw@0
|
400 static int mondelefant_conn_is_ok(lua_State *L) {
|
jbe/bsw@0
|
401 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
402 lua_settop(L, 1);
|
jbe/bsw@0
|
403 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
404 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
|
jbe/bsw@0
|
405 return 1;
|
jbe/bsw@0
|
406 }
|
jbe/bsw@0
|
407
|
jbe@23
|
408 // method "get_transaction_status" of database handles:
|
jbe/bsw@0
|
409 static int mondelefant_conn_get_transaction_status(lua_State *L) {
|
jbe/bsw@0
|
410 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
411 lua_settop(L, 1);
|
jbe/bsw@0
|
412 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
413 switch (PQtransactionStatus(conn->pgconn)) {
|
jbe/bsw@0
|
414 case PQTRANS_IDLE:
|
jbe/bsw@0
|
415 lua_pushliteral(L, "idle");
|
jbe/bsw@0
|
416 break;
|
jbe/bsw@0
|
417 case PQTRANS_ACTIVE:
|
jbe/bsw@0
|
418 lua_pushliteral(L, "active");
|
jbe/bsw@0
|
419 break;
|
jbe/bsw@0
|
420 case PQTRANS_INTRANS:
|
jbe/bsw@0
|
421 lua_pushliteral(L, "intrans");
|
jbe/bsw@0
|
422 break;
|
jbe/bsw@0
|
423 case PQTRANS_INERROR:
|
jbe/bsw@0
|
424 lua_pushliteral(L, "inerror");
|
jbe/bsw@0
|
425 break;
|
jbe/bsw@0
|
426 default:
|
jbe/bsw@0
|
427 lua_pushliteral(L, "unknown");
|
jbe/bsw@0
|
428 }
|
jbe/bsw@0
|
429 return 1;
|
jbe/bsw@0
|
430 }
|
jbe/bsw@0
|
431
|
jbe@23
|
432 // method "create_list" of database handles:
|
jbe/bsw@0
|
433 static int mondelefant_conn_create_list(lua_State *L) {
|
jbe@23
|
434 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
435 lua_settop(L, 2);
|
jbe/bsw@0
|
436 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
437 // if no second argument is given, use an empty table:
|
jbe/bsw@0
|
438 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
439 lua_newtable(L);
|
jbe/bsw@0
|
440 lua_replace(L, 2); // new result at stack position 2
|
jbe/bsw@0
|
441 }
|
jbe@23
|
442 // set meta-table for database result lists/objects:
|
jbe/bsw@0
|
443 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
|
jbe/bsw@0
|
444 lua_setmetatable(L, 2);
|
jbe@23
|
445 // set "_connection" attribute to self:
|
jbe/bsw@0
|
446 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
447 lua_setfield(L, 2, "_connection");
|
jbe@23
|
448 // set "_type" attribute to string "list":
|
jbe/bsw@0
|
449 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
450 lua_setfield(L, 2, "_type");
|
jbe@23
|
451 // return created database result list:
|
jbe/bsw@0
|
452 return 1;
|
jbe/bsw@0
|
453 }
|
jbe/bsw@0
|
454
|
jbe@23
|
455 // method "create_object" of database handles:
|
jbe/bsw@0
|
456 static int mondelefant_conn_create_object(lua_State *L) {
|
jbe@23
|
457 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
458 lua_settop(L, 2);
|
jbe/bsw@0
|
459 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
460 // if no second argument is given, use an empty table:
|
jbe/bsw@0
|
461 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
462 lua_newtable(L);
|
jbe/bsw@0
|
463 lua_replace(L, 2); // new result at stack position 2
|
jbe/bsw@0
|
464 }
|
jbe@23
|
465 // set meta-table for database result lists/objects:
|
jbe/bsw@0
|
466 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 3
|
jbe/bsw@0
|
467 lua_setmetatable(L, 2);
|
jbe@23
|
468 // set "_connection" attribute to self:
|
jbe/bsw@0
|
469 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
470 lua_setfield(L, 2, "_connection");
|
jbe@23
|
471 // set "_type" attribute to string "object":
|
jbe/bsw@0
|
472 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
473 lua_setfield(L, 2, "_type"); // "object" or "list"
|
jbe@23
|
474 // create empty tables for "_data", "_dirty" and "_ref" attributes:
|
jbe/bsw@0
|
475 lua_newtable(L); // 3
|
jbe/bsw@0
|
476 lua_setfield(L, 2, "_data");
|
jbe/bsw@0
|
477 lua_newtable(L); // 3
|
jbe/bsw@0
|
478 lua_setfield(L, 2, "_dirty");
|
jbe/bsw@0
|
479 lua_newtable(L); // 3
|
jbe/bsw@0
|
480 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
|
jbe@23
|
481 // return created database result object:
|
jbe/bsw@0
|
482 return 1;
|
jbe/bsw@0
|
483 }
|
jbe/bsw@0
|
484
|
jbe@23
|
485 // method "quote_string" of database handles:
|
jbe/bsw@0
|
486 static int mondelefant_conn_quote_string(lua_State *L) {
|
jbe/bsw@0
|
487 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
488 const char *input;
|
jbe/bsw@0
|
489 size_t input_len;
|
jbe/bsw@0
|
490 char *output;
|
jbe/bsw@0
|
491 size_t output_len;
|
jbe@23
|
492 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
493 lua_settop(L, 2);
|
jbe/bsw@0
|
494 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
495 // get second argument, which must be a string:
|
jbe/bsw@0
|
496 input = luaL_checklstring(L, 2, &input_len);
|
jbe@23
|
497 // throw error, if string is too long:
|
jbe/bsw@0
|
498 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
|
jbe/bsw@0
|
499 return luaL_error(L, "String to be escaped is too long.");
|
jbe/bsw@0
|
500 }
|
jbe@23
|
501 // allocate memory for quoted string:
|
jbe/bsw@0
|
502 output = malloc((2 * input_len + 3) * sizeof(char));
|
jbe/bsw@0
|
503 if (!output) {
|
jbe/bsw@0
|
504 return luaL_error(L, "Could not allocate memory for string quoting.");
|
jbe/bsw@0
|
505 }
|
jbe@23
|
506 // do escaping by calling PQescapeStringConn and enclosing result with
|
jbe@23
|
507 // single quotes:
|
jbe/bsw@0
|
508 output[0] = '\'';
|
jbe/bsw@0
|
509 output_len = PQescapeStringConn(
|
jbe/bsw@0
|
510 conn->pgconn, output + 1, input, input_len, NULL
|
jbe/bsw@0
|
511 );
|
jbe/bsw@0
|
512 output[output_len + 1] = '\'';
|
jbe/bsw@0
|
513 output[output_len + 2] = 0;
|
jbe@23
|
514 // create Lua string:
|
jbe/bsw@0
|
515 lua_pushlstring(L, output, output_len + 2);
|
jbe@23
|
516 // free allocated memory:
|
jbe/bsw@0
|
517 free(output);
|
jbe@23
|
518 // return Lua string:
|
jbe/bsw@0
|
519 return 1;
|
jbe/bsw@0
|
520 }
|
jbe/bsw@0
|
521
|
jbe@23
|
522 // method "quote_binary" of database handles:
|
jbe/bsw@0
|
523 static int mondelefant_conn_quote_binary(lua_State *L) {
|
jbe/bsw@0
|
524 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
525 const char *input;
|
jbe/bsw@0
|
526 size_t input_len;
|
jbe/bsw@0
|
527 char *output;
|
jbe/bsw@0
|
528 size_t output_len;
|
jbe/bsw@0
|
529 luaL_Buffer buf;
|
jbe@23
|
530 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
531 lua_settop(L, 2);
|
jbe/bsw@0
|
532 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
533 // get second argument, which must be a string:
|
jbe/bsw@0
|
534 input = luaL_checklstring(L, 2, &input_len);
|
jbe@23
|
535 // call PQescapeByteaConn, which allocates memory itself:
|
jbe/bsw@0
|
536 output = (char *)PQescapeByteaConn(
|
jbe/bsw@0
|
537 conn->pgconn, (const unsigned char *)input, input_len, &output_len
|
jbe/bsw@0
|
538 );
|
jbe@23
|
539 // if PQescapeByteaConn returned NULL, then throw error:
|
jbe/bsw@0
|
540 if (!output) {
|
jbe/bsw@0
|
541 return luaL_error(L, "Could not allocate memory for binary quoting.");
|
jbe/bsw@0
|
542 }
|
jbe@23
|
543 // create Lua string enclosed by single quotes:
|
jbe/bsw@0
|
544 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
545 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
546 luaL_addlstring(&buf, output, output_len - 1);
|
jbe/bsw@0
|
547 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
548 luaL_pushresult(&buf);
|
jbe@23
|
549 // free memory allocated by PQescapeByteaConn:
|
jbe/bsw@0
|
550 PQfreemem(output);
|
jbe@23
|
551 // return Lua string:
|
jbe/bsw@0
|
552 return 1;
|
jbe/bsw@0
|
553 }
|
jbe/bsw@0
|
554
|
jbe@23
|
555 // method "assemble_command" of database handles:
|
jbe/bsw@0
|
556 static int mondelefant_conn_assemble_command(lua_State *L) {
|
jbe/bsw@0
|
557 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
558 int paramidx = 2;
|
jbe/bsw@0
|
559 const char *template;
|
jbe/bsw@0
|
560 size_t template_pos = 0;
|
jbe/bsw@0
|
561 luaL_Buffer buf;
|
jbe@23
|
562 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
563 lua_settop(L, 2);
|
jbe/bsw@0
|
564 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
565 // if second argument is a string, return this string:
|
jbe/bsw@0
|
566 if (lua_isstring(L, 2)) {
|
jbe/bsw@0
|
567 lua_tostring(L, 2);
|
jbe/bsw@0
|
568 return 1;
|
jbe/bsw@0
|
569 }
|
jbe@23
|
570 // if second argument has __tostring meta-method,
|
jbe@23
|
571 // then use this method and return its result:
|
jbe/bsw@0
|
572 if (luaL_callmeta(L, 2, "__tostring")) return 1;
|
jbe@23
|
573 // otherwise, require that second argument is a table:
|
jbe/bsw@0
|
574 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@23
|
575 // get first element of table, which must be a string:
|
jbe/bsw@0
|
576 lua_rawgeti(L, 2, 1); // 3
|
jbe/bsw@0
|
577 luaL_argcheck(L,
|
jbe/bsw@0
|
578 lua_isstring(L, 3),
|
jbe/bsw@0
|
579 2,
|
jbe/bsw@0
|
580 "First entry of SQL command structure is not a string."
|
jbe/bsw@0
|
581 );
|
jbe/bsw@0
|
582 template = lua_tostring(L, 3);
|
jbe@23
|
583 // get value of "input_converter" attribute of database connection:
|
jbe/bsw@0
|
584 lua_pushliteral(L, "input_converter"); // 4
|
jbe/bsw@0
|
585 lua_gettable(L, 1); // input_converter at stack position 4
|
jbe@23
|
586 // reserve space on Lua stack:
|
jbe/bsw@0
|
587 lua_pushnil(L); // free space at stack position 5
|
jbe/bsw@0
|
588 lua_pushnil(L); // free space at stack position 6
|
jbe@23
|
589 // initialize Lua buffer for result string:
|
jbe/bsw@0
|
590 luaL_buffinit(L, &buf);
|
jbe@23
|
591 // fill buffer in loop:
|
jbe/bsw@0
|
592 while (1) {
|
jbe@23
|
593 // variable declaration:
|
jbe/bsw@0
|
594 char c;
|
jbe@23
|
595 // get next character:
|
jbe/bsw@0
|
596 c = template[template_pos++];
|
jbe@23
|
597 // break, when character is NULL byte:
|
jbe/bsw@0
|
598 if (!c) break;
|
jbe@23
|
599 // question-mark and dollar-sign are special characters:
|
jbe@23
|
600 if (c == '?' || c == '$') { // special character found
|
jbe@23
|
601 // check, if same character follows:
|
jbe@23
|
602 if (template[template_pos] == c) { // special character is escaped
|
jbe@23
|
603 // consume two characters of input and add one character to buffer:
|
jbe/bsw@0
|
604 template_pos++;
|
jbe/bsw@0
|
605 luaL_addchar(&buf, c);
|
jbe@23
|
606 } else { // special character is not escaped
|
jbe/bsw@0
|
607 luaL_Buffer keybuf;
|
jbe/bsw@0
|
608 int subcmd;
|
jbe@23
|
609 // set 'subcmd' = true, if special character was a dollar-sign,
|
jbe@23
|
610 // set 'subcmd' = false, if special character was a question-mark:
|
jbe/bsw@0
|
611 subcmd = (c == '$');
|
jbe@23
|
612 // read any number of alpha numeric chars or underscores
|
jbe@23
|
613 // and store them on Lua stack:
|
jbe/bsw@0
|
614 luaL_buffinit(L, &keybuf);
|
jbe/bsw@0
|
615 while (1) {
|
jbe/bsw@0
|
616 c = template[template_pos];
|
jbe/bsw@0
|
617 if (
|
jbe/bsw@0
|
618 (c < 'A' || c > 'Z') &&
|
jbe/bsw@0
|
619 (c < 'a' || c > 'z') &&
|
jbe/bsw@0
|
620 (c < '0' || c > '9') &&
|
jbe/bsw@0
|
621 (c != '_')
|
jbe/bsw@0
|
622 ) break;
|
jbe/bsw@0
|
623 luaL_addchar(&keybuf, c);
|
jbe/bsw@0
|
624 template_pos++;
|
jbe/bsw@0
|
625 }
|
jbe/bsw@0
|
626 luaL_pushresult(&keybuf);
|
jbe@23
|
627 // check, if any characters matched:
|
jbe/bsw@0
|
628 if (lua_objlen(L, -1)) {
|
jbe@23
|
629 // if any alpha numeric chars or underscores were found,
|
jbe@23
|
630 // push them on stack as a Lua string and use them to lookup
|
jbe@23
|
631 // value from second argument:
|
jbe/bsw@0
|
632 lua_pushvalue(L, -1); // save key on stack
|
jbe@23
|
633 lua_gettable(L, 2); // fetch value (raw-value)
|
jbe/bsw@0
|
634 } else {
|
jbe@23
|
635 // otherwise push nil and use numeric lookup based on 'paramidx':
|
jbe/bsw@0
|
636 lua_pop(L, 1);
|
jbe/bsw@0
|
637 lua_pushnil(L); // put nil on key position
|
jbe@23
|
638 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
|
jbe/bsw@0
|
639 }
|
jbe@23
|
640 // Lua stack contains: ..., <buffer>, key, raw-value
|
jbe@23
|
641 // branch according to type of special character ("?" or "$"):
|
jbe@23
|
642 if (subcmd) { // dollar-sign
|
jbe/bsw@0
|
643 size_t i;
|
jbe/bsw@0
|
644 size_t count;
|
jbe@23
|
645 // store fetched value (which is supposed to be sub-structure)
|
jbe@23
|
646 // on Lua stack position 5 and drop key:
|
jbe@23
|
647 lua_replace(L, 5);
|
jbe@23
|
648 lua_pop(L, 1);
|
jbe@23
|
649 // Lua stack contains: ..., <buffer>
|
jbe@23
|
650 // check, if fetched value is really a sub-structure:
|
jbe/bsw@0
|
651 luaL_argcheck(L,
|
jbe/bsw@0
|
652 !lua_isnil(L, 5),
|
jbe/bsw@0
|
653 2,
|
jbe/bsw@0
|
654 "SQL sub-structure not found."
|
jbe/bsw@0
|
655 );
|
jbe/bsw@0
|
656 luaL_argcheck(L,
|
jbe/bsw@0
|
657 lua_type(L, 5) == LUA_TTABLE,
|
jbe/bsw@0
|
658 2,
|
jbe/bsw@0
|
659 "SQL sub-structure must be a table."
|
jbe/bsw@0
|
660 );
|
jbe@23
|
661 // Lua stack contains: ..., <buffer>
|
jbe@23
|
662 // get value of "sep" attribute of sub-structure,
|
jbe@23
|
663 // and place it on Lua stack position 6:
|
jbe/bsw@0
|
664 lua_getfield(L, 5, "sep");
|
jbe@23
|
665 lua_replace(L, 6);
|
jbe@23
|
666 // if seperator is nil, then use ", " as default,
|
jbe@23
|
667 // if seperator is neither nil nor a string, then throw error:
|
jbe/bsw@0
|
668 if (lua_isnil(L, 6)) {
|
jbe/bsw@0
|
669 lua_pushstring(L, ", ");
|
jbe/bsw@0
|
670 lua_replace(L, 6);
|
jbe/bsw@0
|
671 } else {
|
jbe/bsw@0
|
672 luaL_argcheck(L,
|
jbe/bsw@0
|
673 lua_isstring(L, 6),
|
jbe/bsw@0
|
674 2,
|
jbe/bsw@0
|
675 "Seperator of SQL sub-structure has to be a string."
|
jbe/bsw@0
|
676 );
|
jbe/bsw@0
|
677 }
|
jbe@23
|
678 // iterate over items of sub-structure:
|
jbe/bsw@0
|
679 count = lua_objlen(L, 5);
|
jbe/bsw@0
|
680 for (i = 0; i < count; i++) {
|
jbe@23
|
681 // add seperator, unless this is the first run:
|
jbe/bsw@0
|
682 if (i) {
|
jbe/bsw@0
|
683 lua_pushvalue(L, 6);
|
jbe/bsw@0
|
684 luaL_addvalue(&buf);
|
jbe/bsw@0
|
685 }
|
jbe@23
|
686 // recursivly apply assemble function and add results to buffer:
|
jbe/bsw@0
|
687 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
688 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
689 lua_rawgeti(L, 5, i+1);
|
jbe/bsw@0
|
690 lua_call(L, 2, 1);
|
jbe/bsw@0
|
691 luaL_addvalue(&buf);
|
jbe/bsw@0
|
692 }
|
jbe@23
|
693 } else { // question-mark
|
jbe/bsw@0
|
694 if (lua_toboolean(L, 4)) {
|
jbe@23
|
695 // call input_converter with connection handle, raw-value and
|
jbe@23
|
696 // an info-table which contains a "field_name" entry with the
|
jbe@23
|
697 // used key:
|
jbe/bsw@0
|
698 lua_pushvalue(L, 4);
|
jbe/bsw@0
|
699 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
700 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
701 lua_newtable(L);
|
jbe/bsw@0
|
702 lua_pushvalue(L, -6);
|
jbe/bsw@0
|
703 lua_setfield(L, -2, "field_name");
|
jbe/bsw@0
|
704 lua_call(L, 3, 1);
|
jbe@23
|
705 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
|
jbe@23
|
706 // remove key and raw-value:
|
jbe/bsw@0
|
707 lua_remove(L, -2);
|
jbe/bsw@0
|
708 lua_remove(L, -2);
|
jbe@23
|
709 // Lua stack contains: ..., <buffer>, final-value
|
jbe@23
|
710 // throw error, if final-value is not a string:
|
jbe/bsw@0
|
711 if (!lua_isstring(L, -1)) {
|
jbe/bsw@0
|
712 return luaL_error(L, "input_converter returned non-string.");
|
jbe/bsw@0
|
713 }
|
jbe/bsw@0
|
714 } else {
|
jbe@23
|
715 // remove key from stack:
|
jbe/bsw@0
|
716 lua_remove(L, -2);
|
jbe@23
|
717 // Lua stack contains: ..., <buffer>, raw-value
|
jbe@23
|
718 // branch according to type of value:
|
jbe@23
|
719 if (lua_isnil(L, -1)) { // value is nil
|
jbe@23
|
720 // push string "NULL" to stack:
|
jbe/bsw@0
|
721 lua_pushliteral(L, "NULL");
|
jbe@23
|
722 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
|
jbe@23
|
723 // push strings "TRUE" or "FALSE" to stack:
|
jbe/bsw@0
|
724 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
|
jbe@23
|
725 } else if (lua_isstring(L, -1)) { // value is string or number
|
jbe/bsw@0
|
726 // NOTE: In this version of lua a number will be converted
|
jbe@23
|
727 // push output of "quote_string" method of database
|
jbe@23
|
728 // connection to stack:
|
jbe/bsw@0
|
729 lua_tostring(L, -1);
|
jbe/bsw@0
|
730 lua_pushcfunction(L, mondelefant_conn_quote_string);
|
jbe/bsw@0
|
731 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
732 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
733 lua_call(L, 2, 1);
|
jbe@23
|
734 } else { // value is of other type
|
jbe@23
|
735 // throw error:
|
jbe/bsw@0
|
736 return luaL_error(L,
|
jbe/bsw@0
|
737 "Unable to convert SQL value due to unknown type "
|
jbe/bsw@0
|
738 "or missing input_converter."
|
jbe/bsw@0
|
739 );
|
jbe/bsw@0
|
740 }
|
jbe@23
|
741 // Lua stack contains: ..., <buffer>, raw-value, final-value
|
jbe@23
|
742 // remove raw-value:
|
jbe/bsw@0
|
743 lua_remove(L, -2);
|
jbe@23
|
744 // Lua stack contains: ..., <buffer>, final-value
|
jbe/bsw@0
|
745 }
|
jbe@23
|
746 // append final-value to buffer:
|
jbe/bsw@0
|
747 luaL_addvalue(&buf);
|
jbe/bsw@0
|
748 }
|
jbe/bsw@0
|
749 }
|
jbe@23
|
750 } else { // character is not special
|
jbe@23
|
751 // just copy character:
|
jbe/bsw@0
|
752 luaL_addchar(&buf, c);
|
jbe/bsw@0
|
753 }
|
jbe/bsw@0
|
754 }
|
jbe@23
|
755 // return string in buffer:
|
jbe/bsw@0
|
756 luaL_pushresult(&buf);
|
jbe/bsw@0
|
757 return 1;
|
jbe/bsw@0
|
758 }
|
jbe/bsw@0
|
759
|
jbe@23
|
760 // max number of SQL statements executed by one "query" method call:
|
jbe/bsw@0
|
761 #define MONDELEFANT_MAX_COMMAND_COUNT 64
|
jbe@23
|
762 // max number of columns in a database result:
|
jbe/bsw@0
|
763 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
|
jbe@23
|
764 // enum values for 'modes' array in C-function below:
|
jbe/bsw@0
|
765 #define MONDELEFANT_QUERY_MODE_LIST 1
|
jbe/bsw@0
|
766 #define MONDELEFANT_QUERY_MODE_OBJECT 2
|
jbe/bsw@0
|
767 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
|
jbe/bsw@0
|
768
|
jbe@23
|
769 // method "try_query" of database handles:
|
jbe/bsw@0
|
770 static int mondelefant_conn_try_query(lua_State *L) {
|
jbe/bsw@0
|
771 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
772 int command_count;
|
jbe/bsw@0
|
773 int command_idx;
|
jbe/bsw@0
|
774 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
|
jbe/bsw@0
|
775 luaL_Buffer buf;
|
jbe/bsw@0
|
776 int sent_success;
|
jbe/bsw@0
|
777 PGresult *res;
|
jbe/bsw@0
|
778 int rows, cols, row, col;
|
jbe@23
|
779 // get 'conn' attribute of C-struct of database connection:
|
jbe/bsw@0
|
780 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
781 // calculate number of commands (2 arguments for one command):
|
jbe/bsw@0
|
782 command_count = lua_gettop(L) / 2;
|
jbe@23
|
783 // push nil on stack, which is needed, if last mode was ommitted:
|
jbe@23
|
784 lua_pushnil(L);
|
jbe@23
|
785 // throw error, if number of commands is too high:
|
jbe/bsw@0
|
786 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
|
jbe/bsw@0
|
787 return luaL_error(L, "Exceeded maximum command count in one query.");
|
jbe/bsw@0
|
788 }
|
jbe@23
|
789 // create SQL string, store query modes and push SQL string on stack:
|
jbe/bsw@0
|
790 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
791 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
792 int mode;
|
jbe/bsw@0
|
793 int mode_idx; // stack index of mode string
|
jbe/bsw@0
|
794 if (command_idx) luaL_addchar(&buf, ' ');
|
jbe/bsw@0
|
795 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
796 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
797 lua_pushvalue(L, 2 + 2 * command_idx);
|
jbe/bsw@0
|
798 lua_call(L, 2, 1);
|
jbe/bsw@0
|
799 luaL_addvalue(&buf);
|
jbe/bsw@0
|
800 luaL_addchar(&buf, ';');
|
jbe/bsw@0
|
801 mode_idx = 3 + 2 * command_idx;
|
jbe/bsw@0
|
802 if (lua_isnil(L, mode_idx)) {
|
jbe/bsw@0
|
803 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
804 } else {
|
jbe/bsw@0
|
805 const char *modestr;
|
jbe/bsw@0
|
806 modestr = luaL_checkstring(L, mode_idx);
|
jbe/bsw@0
|
807 if (!strcmp(modestr, "list")) {
|
jbe/bsw@0
|
808 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
809 } else if (!strcmp(modestr, "object")) {
|
jbe/bsw@0
|
810 mode = MONDELEFANT_QUERY_MODE_OBJECT;
|
jbe/bsw@0
|
811 } else if (!strcmp(modestr, "opt_object")) {
|
jbe/bsw@0
|
812 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
|
jbe/bsw@0
|
813 } else {
|
jbe/bsw@0
|
814 return luaL_error(L, "Unknown query mode specified.");
|
jbe/bsw@0
|
815 }
|
jbe/bsw@0
|
816 }
|
jbe/bsw@0
|
817 modes[command_idx] = mode;
|
jbe/bsw@0
|
818 }
|
jbe/bsw@0
|
819 luaL_pushresult(&buf); // stack position unknown
|
jbe/bsw@0
|
820 lua_replace(L, 2); // SQL command string to stack position 2
|
jbe@23
|
821 // call sql_tracer, if set:
|
jbe/bsw@0
|
822 lua_settop(L, 2);
|
jbe/bsw@0
|
823 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
|
jbe/bsw@0
|
824 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
825 lua_pushvalue(L, 1); // 4
|
jbe/bsw@0
|
826 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
827 lua_call(L, 2, 1); // trace callback at stack position 3
|
jbe/bsw@0
|
828 }
|
jbe@23
|
829 // NOTE: If no tracer was found, then nil or false is stored at stack
|
jbe@23
|
830 // position 3.
|
jbe@23
|
831 // call PQsendQuery function and store result in 'sent_success' variable:
|
jbe/bsw@0
|
832 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
|
jbe@23
|
833 // create preliminary result table:
|
jbe/bsw@0
|
834 lua_newtable(L); // results in table at stack position 4
|
jbe@23
|
835 // iterate over results using function PQgetResult to fill result table:
|
jbe/bsw@0
|
836 for (command_idx = 0; ; command_idx++) {
|
jbe/bsw@0
|
837 int mode;
|
jbe/bsw@0
|
838 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
|
jbe/bsw@0
|
839 ExecStatusType pgstatus;
|
jbe@23
|
840 // fetch mode which was given for the command:
|
jbe/bsw@0
|
841 mode = modes[command_idx];
|
jbe@23
|
842 // if PQsendQuery call was successful, then fetch result data:
|
jbe/bsw@0
|
843 if (sent_success) {
|
jbe@23
|
844 // NOTE: PQgetResult called one extra time. Break only, if all
|
jbe@23
|
845 // queries have been processed and PQgetResult returned NULL.
|
jbe/bsw@0
|
846 res = PQgetResult(conn->pgconn);
|
jbe/bsw@0
|
847 if (command_idx >= command_count && !res) break;
|
jbe/bsw@0
|
848 if (res) {
|
jbe/bsw@0
|
849 pgstatus = PQresultStatus(res);
|
jbe/bsw@0
|
850 rows = PQntuples(res);
|
jbe/bsw@0
|
851 cols = PQnfields(res);
|
jbe/bsw@0
|
852 }
|
jbe/bsw@0
|
853 }
|
jbe@23
|
854 // handle errors:
|
jbe/bsw@0
|
855 if (
|
jbe/bsw@0
|
856 !sent_success || command_idx >= command_count || !res ||
|
jbe/bsw@0
|
857 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
|
jbe/bsw@0
|
858 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
|
jbe/bsw@0
|
859 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
|
jbe/bsw@0
|
860 ) {
|
jbe/bsw@0
|
861 const char *command;
|
jbe/bsw@0
|
862 command = lua_tostring(L, 2);
|
jbe/bsw@0
|
863 lua_newtable(L); // 5
|
jbe/bsw@0
|
864 lua_getfield(L,
|
jbe/bsw@0
|
865 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
866 MONDELEFANT_ERROROBJECT_MT_REGKEY
|
jbe/bsw@0
|
867 );
|
jbe/bsw@0
|
868 lua_setmetatable(L, 5);
|
jbe/bsw@0
|
869 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
870 lua_setfield(L, 5, "connection");
|
jbe/bsw@0
|
871 lua_pushinteger(L, command_idx + 1);
|
jbe/bsw@0
|
872 lua_setfield(L, 5, "command_number");
|
jbe/bsw@0
|
873 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
874 lua_setfield(L, 5, "sql_command");
|
jbe/bsw@0
|
875 if (!res) {
|
jbe/bsw@0
|
876 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
|
jbe/bsw@0
|
877 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
878 lua_pushliteral(L, "Received too few database result sets.");
|
jbe/bsw@0
|
879 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
880 } else if (command_idx >= command_count) {
|
jbe/bsw@0
|
881 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
|
jbe/bsw@0
|
882 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
883 lua_pushliteral(L, "Received too many database result sets.");
|
jbe/bsw@0
|
884 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
885 } else if (
|
jbe/bsw@0
|
886 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
|
jbe/bsw@0
|
887 ) {
|
jbe/bsw@0
|
888 const char *sqlstate;
|
jbe/bsw@0
|
889 const char *errmsg;
|
jbe/bsw@0
|
890 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
|
jbe/bsw@0
|
891 lua_setfield(L, 5, "pg_severity");
|
jbe/bsw@0
|
892 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
|
jbe/bsw@0
|
893 if (sqlstate) {
|
jbe/bsw@0
|
894 lua_pushstring(L, sqlstate);
|
jbe/bsw@0
|
895 lua_setfield(L, 5, "pg_sqlstate");
|
jbe/bsw@0
|
896 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
|
jbe/bsw@0
|
897 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
898 } else {
|
jbe/bsw@0
|
899 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
|
jbe/bsw@0
|
900 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
901 }
|
jbe/bsw@0
|
902 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
|
jbe/bsw@0
|
903 if (errmsg) {
|
jbe/bsw@0
|
904 mondelefant_push_first_line(L, errmsg);
|
jbe/bsw@0
|
905 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
906 lua_pushstring(L, errmsg);
|
jbe/bsw@0
|
907 lua_setfield(L, 5, "pg_message_primary");
|
jbe/bsw@0
|
908 } else {
|
jbe/bsw@0
|
909 lua_pushliteral(L,
|
jbe/bsw@0
|
910 "Error while fetching result, but no error message given."
|
jbe/bsw@0
|
911 );
|
jbe/bsw@0
|
912 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
913 }
|
jbe/bsw@0
|
914 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
|
jbe/bsw@0
|
915 lua_setfield(L, 5, "pg_message_detail");
|
jbe/bsw@0
|
916 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
|
jbe/bsw@0
|
917 lua_setfield(L, 5, "pg_message_hint");
|
jbe/bsw@0
|
918 // NOTE: "position" and "pg_internal_position" are recalculated to
|
jbe/bsw@0
|
919 // byte offsets, as Lua 5.1 is not Unicode aware.
|
jbe/bsw@0
|
920 {
|
jbe/bsw@0
|
921 char *tmp;
|
jbe/bsw@0
|
922 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
|
jbe/bsw@0
|
923 if (tmp) {
|
jbe/bsw@0
|
924 int pos;
|
jbe/bsw@0
|
925 pos = atoi(tmp) - 1;
|
jbe/bsw@0
|
926 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe/bsw@0
|
927 pos = utf8_position_to_byte(command, pos);
|
jbe/bsw@0
|
928 }
|
jbe/bsw@0
|
929 lua_pushinteger(L, pos + 1);
|
jbe/bsw@0
|
930 lua_setfield(L, 5, "position");
|
jbe/bsw@0
|
931 }
|
jbe/bsw@0
|
932 }
|
jbe/bsw@0
|
933 {
|
jbe/bsw@0
|
934 const char *internal_query;
|
jbe/bsw@0
|
935 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
|
jbe/bsw@0
|
936 lua_pushstring(L, internal_query);
|
jbe/bsw@0
|
937 lua_setfield(L, 5, "pg_internal_query");
|
jbe/bsw@0
|
938 char *tmp;
|
jbe/bsw@0
|
939 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
|
jbe/bsw@0
|
940 if (tmp) {
|
jbe/bsw@0
|
941 int pos;
|
jbe/bsw@0
|
942 pos = atoi(tmp) - 1;
|
jbe/bsw@0
|
943 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe/bsw@0
|
944 pos = utf8_position_to_byte(internal_query, pos);
|
jbe/bsw@0
|
945 }
|
jbe/bsw@0
|
946 lua_pushinteger(L, pos + 1);
|
jbe/bsw@0
|
947 lua_setfield(L, 5, "pg_internal_position");
|
jbe/bsw@0
|
948 }
|
jbe/bsw@0
|
949 }
|
jbe/bsw@0
|
950 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
|
jbe/bsw@0
|
951 lua_setfield(L, 5, "pg_context");
|
jbe/bsw@0
|
952 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
|
jbe/bsw@0
|
953 lua_setfield(L, 5, "pg_source_file");
|
jbe/bsw@0
|
954 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
|
jbe/bsw@0
|
955 lua_setfield(L, 5, "pg_source_line");
|
jbe/bsw@0
|
956 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
|
jbe/bsw@0
|
957 lua_setfield(L, 5, "pg_source_function");
|
jbe/bsw@0
|
958 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
|
jbe/bsw@0
|
959 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
|
jbe/bsw@0
|
960 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
961 lua_pushliteral(L, "Expected one row, but got empty set.");
|
jbe/bsw@0
|
962 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
963 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
964 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
|
jbe/bsw@0
|
965 lua_setfield(L, 5, "code");
|
jbe/bsw@0
|
966 lua_pushliteral(L, "Got more than one result row.");
|
jbe/bsw@0
|
967 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
968 } else {
|
jbe/bsw@0
|
969 // should not happen
|
jbe/bsw@0
|
970 abort();
|
jbe/bsw@0
|
971 }
|
jbe/bsw@0
|
972 if (res) {
|
jbe/bsw@0
|
973 PQclear(res);
|
jbe/bsw@0
|
974 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
|
jbe/bsw@0
|
975 }
|
jbe/bsw@0
|
976 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
977 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
978 lua_pushvalue(L, 5);
|
jbe/bsw@0
|
979 lua_call(L, 1, 0);
|
jbe/bsw@0
|
980 }
|
jbe/bsw@0
|
981 return 1;
|
jbe/bsw@0
|
982 }
|
jbe@23
|
983 // call "create_list" or "create_object" method of database handle,
|
jbe@23
|
984 // result will be at stack position 5:
|
jbe/bsw@0
|
985 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
986 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
|
jbe/bsw@0
|
987 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
988 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
989 } else {
|
jbe/bsw@0
|
990 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
|
jbe/bsw@0
|
991 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
992 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
993 }
|
jbe@23
|
994 // set "_column_info":
|
jbe@23
|
995 lua_newtable(L); // 6
|
jbe/bsw@0
|
996 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
997 lua_newtable(L); // 7
|
jbe/bsw@0
|
998 lua_pushstring(L, PQfname(res, col));
|
jbe/bsw@0
|
999 lua_setfield(L, 7, "field_name");
|
jbe/bsw@0
|
1000 {
|
jbe/bsw@0
|
1001 Oid tmp;
|
jbe/bsw@0
|
1002 tmp = PQftable(res, col);
|
jbe/bsw@0
|
1003 if (tmp == InvalidOid) lua_pushnil(L);
|
jbe/bsw@0
|
1004 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1005 lua_setfield(L, 7, "table_oid");
|
jbe/bsw@0
|
1006 }
|
jbe/bsw@0
|
1007 {
|
jbe/bsw@0
|
1008 int tmp;
|
jbe/bsw@0
|
1009 tmp = PQftablecol(res, col);
|
jbe/bsw@0
|
1010 if (tmp == 0) lua_pushnil(L);
|
jbe/bsw@0
|
1011 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1012 lua_setfield(L, 7, "table_column_number");
|
jbe/bsw@0
|
1013 }
|
jbe/bsw@0
|
1014 {
|
jbe/bsw@0
|
1015 Oid tmp;
|
jbe/bsw@0
|
1016 tmp = PQftype(res, col);
|
jbe/bsw@0
|
1017 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
|
jbe/bsw@0
|
1018 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1019 lua_setfield(L, 7, "type_oid");
|
jbe/bsw@0
|
1020 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
|
jbe/bsw@0
|
1021 lua_setfield(L, 7, "type");
|
jbe/bsw@0
|
1022 }
|
jbe/bsw@0
|
1023 {
|
jbe/bsw@0
|
1024 int tmp;
|
jbe/bsw@0
|
1025 tmp = PQfmod(res, col);
|
jbe/bsw@0
|
1026 if (tmp == -1) lua_pushnil(L);
|
jbe/bsw@0
|
1027 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1028 lua_setfield(L, 7, "type_modifier");
|
jbe/bsw@0
|
1029 }
|
jbe/bsw@0
|
1030 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1031 }
|
jbe@23
|
1032 lua_setfield(L, 5, "_column_info");
|
jbe@23
|
1033 // set "_rows_affected":
|
jbe/bsw@0
|
1034 {
|
jbe/bsw@0
|
1035 char *tmp;
|
jbe/bsw@0
|
1036 tmp = PQcmdTuples(res);
|
jbe/bsw@0
|
1037 if (tmp[0]) {
|
jbe/bsw@0
|
1038 lua_pushinteger(L, atoi(tmp));
|
jbe/bsw@0
|
1039 lua_setfield(L, 5, "_rows_affected");
|
jbe/bsw@0
|
1040 }
|
jbe/bsw@0
|
1041 }
|
jbe@23
|
1042 // set "_oid":
|
jbe/bsw@0
|
1043 {
|
jbe/bsw@0
|
1044 Oid tmp;
|
jbe/bsw@0
|
1045 tmp = PQoidValue(res);
|
jbe/bsw@0
|
1046 if (tmp != InvalidOid) {
|
jbe/bsw@0
|
1047 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1048 lua_setfield(L, 5, "_oid");
|
jbe/bsw@0
|
1049 }
|
jbe/bsw@0
|
1050 }
|
jbe@23
|
1051 // copy data as strings or nil, while performing binary unescaping
|
jbe@23
|
1052 // automatically:
|
jbe/bsw@0
|
1053 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1054 for (row = 0; row < rows; row++) {
|
jbe/bsw@0
|
1055 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
|
jbe/bsw@0
|
1056 lua_pushvalue(L, 1); // 7
|
jbe/bsw@0
|
1057 lua_call(L, 1, 1); // 6
|
jbe/bsw@0
|
1058 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1059 if (PQgetisnull(res, row, col)) {
|
jbe/bsw@0
|
1060 lua_pushnil(L);
|
jbe/bsw@0
|
1061 } else if (binary[col]) {
|
jbe/bsw@0
|
1062 size_t binlen;
|
jbe/bsw@0
|
1063 char *binval;
|
jbe/bsw@0
|
1064 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1065 (unsigned char *)PQgetvalue(res, row, col), &binlen
|
jbe/bsw@0
|
1066 );
|
jbe/bsw@0
|
1067 if (!binval) {
|
jbe/bsw@0
|
1068 return luaL_error(L,
|
jbe/bsw@0
|
1069 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1070 );
|
jbe/bsw@0
|
1071 }
|
jbe/bsw@0
|
1072 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1073 PQfreemem(binval);
|
jbe/bsw@0
|
1074 } else {
|
jbe/bsw@0
|
1075 lua_pushstring(L, PQgetvalue(res, row, col));
|
jbe/bsw@0
|
1076 }
|
jbe/bsw@0
|
1077 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1078 }
|
jbe/bsw@0
|
1079 lua_rawseti(L, 5, row+1);
|
jbe/bsw@0
|
1080 }
|
jbe/bsw@0
|
1081 } else if (rows == 1) {
|
jbe/bsw@0
|
1082 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1083 if (PQgetisnull(res, 0, col)) {
|
jbe/bsw@0
|
1084 lua_pushnil(L);
|
jbe/bsw@0
|
1085 } else if (binary[col]) {
|
jbe/bsw@0
|
1086 size_t binlen;
|
jbe/bsw@0
|
1087 char *binval;
|
jbe/bsw@0
|
1088 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1089 (unsigned char *)PQgetvalue(res, 0, col), &binlen
|
jbe/bsw@0
|
1090 );
|
jbe/bsw@0
|
1091 if (!binval) {
|
jbe/bsw@0
|
1092 return luaL_error(L,
|
jbe/bsw@0
|
1093 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1094 );
|
jbe/bsw@0
|
1095 }
|
jbe/bsw@0
|
1096 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1097 PQfreemem(binval);
|
jbe/bsw@0
|
1098 } else {
|
jbe/bsw@0
|
1099 lua_pushstring(L, PQgetvalue(res, 0, col));
|
jbe/bsw@0
|
1100 }
|
jbe/bsw@0
|
1101 lua_rawseti(L, 5, col+1);
|
jbe/bsw@0
|
1102 }
|
jbe/bsw@0
|
1103 } else {
|
jbe/bsw@0
|
1104 // no row in optrow mode
|
jbe/bsw@0
|
1105 lua_pop(L, 1);
|
jbe/bsw@0
|
1106 lua_pushnil(L);
|
jbe/bsw@0
|
1107 }
|
jbe@23
|
1108 // save result in result list:
|
jbe/bsw@0
|
1109 lua_rawseti(L, 4, command_idx+1);
|
jbe@23
|
1110 // extra assertion:
|
jbe/bsw@0
|
1111 if (lua_gettop(L) != 4) abort(); // should not happen
|
jbe@23
|
1112 // free memory acquired by libpq:
|
jbe/bsw@0
|
1113 PQclear(res);
|
jbe/bsw@0
|
1114 }
|
jbe/bsw@0
|
1115 // trace callback at stack position 3
|
jbe/bsw@0
|
1116 // result at stack position 4 (top of stack)
|
jbe@23
|
1117 // if a trace callback is existent, then call:
|
jbe/bsw@0
|
1118 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1119 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
1120 lua_call(L, 0, 0);
|
jbe/bsw@0
|
1121 }
|
jbe@23
|
1122 // put result at stack position 3:
|
jbe@23
|
1123 lua_replace(L, 3);
|
jbe@23
|
1124 // get output converter to stack position 4:
|
jbe@23
|
1125 lua_getfield(L, 1, "output_converter");
|
jbe@23
|
1126 // apply output converters and fill "_data" table according to column names:
|
jbe/bsw@0
|
1127 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1128 int mode;
|
jbe/bsw@0
|
1129 mode = modes[command_idx];
|
jbe/bsw@0
|
1130 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 5
|
jbe/bsw@0
|
1131 if (lua_toboolean(L, 5)) {
|
jbe/bsw@0
|
1132 lua_getfield(L, 5, "_column_info"); // column_info list at position 6
|
jbe/bsw@0
|
1133 cols = lua_objlen(L, 6);
|
jbe/bsw@0
|
1134 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1135 rows = lua_objlen(L, 5);
|
jbe/bsw@0
|
1136 for (row = 0; row < rows; row++) {
|
jbe/bsw@0
|
1137 lua_rawgeti(L, 5, row+1); // row at stack position 7
|
jbe/bsw@0
|
1138 lua_getfield(L, 7, "_data"); // _data table at stack position 8
|
jbe/bsw@0
|
1139 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1140 lua_rawgeti(L, 6, col+1); // this column info at position 9
|
jbe/bsw@0
|
1141 lua_getfield(L, 9, "field_name"); // 10
|
jbe/bsw@0
|
1142 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1143 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1144 lua_pushvalue(L, 1); // connection
|
jbe/bsw@0
|
1145 lua_rawgeti(L, 7, col+1); // raw-value
|
jbe/bsw@0
|
1146 lua_pushvalue(L, 9); // this column info
|
jbe/bsw@0
|
1147 lua_call(L, 3, 1); // converted value at position 11
|
jbe/bsw@0
|
1148 } else {
|
jbe/bsw@0
|
1149 lua_rawgeti(L, 7, col+1); // raw-value at position 11
|
jbe/bsw@0
|
1150 }
|
jbe/bsw@0
|
1151 lua_pushvalue(L, 11); // 12
|
jbe/bsw@0
|
1152 lua_rawseti(L, 7, col+1);
|
jbe/bsw@0
|
1153 lua_rawset(L, 8);
|
jbe/bsw@0
|
1154 lua_settop(L, 8);
|
jbe/bsw@0
|
1155 }
|
jbe/bsw@0
|
1156 lua_settop(L, 6);
|
jbe/bsw@0
|
1157 }
|
jbe/bsw@0
|
1158 } else {
|
jbe/bsw@0
|
1159 lua_getfield(L, 5, "_data"); // _data table at stack position 7
|
jbe/bsw@0
|
1160 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1161 lua_rawgeti(L, 6, col+1); // this column info at position 8
|
jbe/bsw@0
|
1162 lua_getfield(L, 8, "field_name"); // 9
|
jbe/bsw@0
|
1163 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1164 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1165 lua_pushvalue(L, 1); // connection
|
jbe/bsw@0
|
1166 lua_rawgeti(L, 5, col+1); // raw-value
|
jbe/bsw@0
|
1167 lua_pushvalue(L, 8); // this column info
|
jbe/bsw@0
|
1168 lua_call(L, 3, 1); // converted value at position 10
|
jbe/bsw@0
|
1169 } else {
|
jbe/bsw@0
|
1170 lua_rawgeti(L, 5, col+1); // raw-value at position 10
|
jbe/bsw@0
|
1171 }
|
jbe/bsw@0
|
1172 lua_pushvalue(L, 10); // 11
|
jbe/bsw@0
|
1173 lua_rawseti(L, 5, col+1);
|
jbe/bsw@0
|
1174 lua_rawset(L, 7);
|
jbe/bsw@0
|
1175 lua_settop(L, 7);
|
jbe/bsw@0
|
1176 }
|
jbe/bsw@0
|
1177 }
|
jbe/bsw@0
|
1178 }
|
jbe/bsw@0
|
1179 lua_settop(L, 4);
|
jbe/bsw@0
|
1180 }
|
jbe@23
|
1181 // return nil as first result value, followed by result lists/objects:
|
jbe/bsw@0
|
1182 lua_settop(L, 3);
|
jbe/bsw@0
|
1183 lua_pushnil(L);
|
jbe/bsw@0
|
1184 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1185 lua_rawgeti(L, 3, command_idx+1);
|
jbe/bsw@0
|
1186 }
|
jbe/bsw@0
|
1187 return command_count+1;
|
jbe/bsw@0
|
1188 }
|
jbe/bsw@0
|
1189
|
jbe@23
|
1190 // method "escalate" of error objects:
|
jbe/bsw@0
|
1191 static int mondelefant_errorobject_escalate(lua_State *L) {
|
jbe@23
|
1192 // check, if we may throw an error object instead of an error string:
|
jbe/bsw@0
|
1193 lua_settop(L, 1);
|
jbe/bsw@0
|
1194 lua_getfield(L, 1, "connection"); // 2
|
jbe/bsw@0
|
1195 lua_getfield(L, 2, "error_objects"); // 3
|
jbe/bsw@0
|
1196 if (lua_toboolean(L, 3)) {
|
jbe@23
|
1197 // throw error object:
|
jbe/bsw@0
|
1198 lua_settop(L, 1);
|
jbe/bsw@0
|
1199 return lua_error(L);
|
jbe/bsw@0
|
1200 } else {
|
jbe@23
|
1201 // throw error string:
|
jbe/bsw@0
|
1202 lua_getfield(L, 1, "message"); // 4
|
jbe/bsw@0
|
1203 if (lua_isnil(L, 4)) {
|
jbe/bsw@0
|
1204 return luaL_error(L, "No error message given for escalation.");
|
jbe/bsw@0
|
1205 }
|
jbe/bsw@0
|
1206 return lua_error(L);
|
jbe/bsw@0
|
1207 }
|
jbe/bsw@0
|
1208 }
|
jbe/bsw@0
|
1209
|
jbe@23
|
1210 // method "is_kind_of" of error objects:
|
jbe/bsw@0
|
1211 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
|
jbe/bsw@0
|
1212 lua_settop(L, 2);
|
jbe/bsw@0
|
1213 lua_getfield(L, 1, "code"); // 3
|
jbe/bsw@0
|
1214 if (lua_isstring(L, 3)) {
|
jbe/bsw@0
|
1215 lua_pushboolean(L,
|
jbe/bsw@0
|
1216 mondelefant_check_error_class(
|
jbe/bsw@0
|
1217 lua_tostring(L, 3), luaL_checkstring(L, 2)
|
jbe/bsw@0
|
1218 )
|
jbe/bsw@0
|
1219 );
|
jbe/bsw@0
|
1220 } else {
|
jbe/bsw@0
|
1221 // only happens for errors where code is not set
|
jbe/bsw@0
|
1222 lua_pushboolean(L, 0);
|
jbe/bsw@0
|
1223 }
|
jbe/bsw@0
|
1224 return 1;
|
jbe/bsw@0
|
1225 }
|
jbe/bsw@0
|
1226
|
jbe@23
|
1227 // method "query" of database handles:
|
jbe/bsw@0
|
1228 static int mondelefant_conn_query(lua_State *L) {
|
jbe/bsw@0
|
1229 int argc;
|
jbe@23
|
1230 // count number of arguments:
|
jbe/bsw@0
|
1231 argc = lua_gettop(L);
|
jbe@23
|
1232 // insert "try_query" function/method at stack position 1:
|
jbe/bsw@0
|
1233 lua_pushcfunction(L, mondelefant_conn_try_query);
|
jbe@23
|
1234 lua_insert(L, 1);
|
jbe@23
|
1235 // call "try_query" method:
|
jbe@23
|
1236 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
|
jbe@23
|
1237 // check, if error occurred:
|
jbe@23
|
1238 if (lua_toboolean(L, 1)) {
|
jbe@23
|
1239 // invoke escalate method of error object:
|
jbe/bsw@0
|
1240 lua_pushcfunction(L, mondelefant_errorobject_escalate);
|
jbe@23
|
1241 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
1242 lua_call(L, 1, 0); // will raise an error
|
jbe/bsw@0
|
1243 return 0; // should not be executed
|
jbe/bsw@0
|
1244 } else {
|
jbe@23
|
1245 // return everything but nil error object:
|
jbe@23
|
1246 return lua_gettop(L) - 1;
|
jbe/bsw@0
|
1247 }
|
jbe/bsw@0
|
1248 }
|
jbe/bsw@0
|
1249
|
jbe@23
|
1250 // library function "set_class":
|
jbe/bsw@0
|
1251 static int mondelefant_set_class(lua_State *L) {
|
jbe@23
|
1252 // ensure that first argument is a database result list/object:
|
jbe/bsw@0
|
1253 lua_settop(L, 2);
|
jbe/bsw@0
|
1254 lua_getmetatable(L, 1); // 3
|
jbe/bsw@0
|
1255 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
|
jbe/bsw@0
|
1256 luaL_argcheck(L, lua_equal(L, 3, 4), 1, "not a database result");
|
jbe@23
|
1257 // ensure that second argument is a database class (model):
|
jbe/bsw@0
|
1258 lua_settop(L, 2);
|
jbe/bsw@0
|
1259 lua_getmetatable(L, 2); // 3
|
jbe/bsw@0
|
1260 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
|
jbe/bsw@0
|
1261 luaL_argcheck(L, lua_equal(L, 3, 4), 2, "not a database class");
|
jbe@23
|
1262 // set attribute "_class" of result list/object to given class:
|
jbe/bsw@0
|
1263 lua_settop(L, 2);
|
jbe/bsw@0
|
1264 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1265 lua_setfield(L, 1, "_class");
|
jbe@23
|
1266 // test, if database result is a list (and not a single object):
|
jbe/bsw@0
|
1267 lua_getfield(L, 1, "_type"); // 3
|
jbe/bsw@0
|
1268 lua_pushliteral(L, "list"); // 4
|
jbe/bsw@0
|
1269 if (lua_rawequal(L, 3, 4)) {
|
jbe/bsw@0
|
1270 int i;
|
jbe@23
|
1271 // set attribute "_class" of all elements to given class:
|
jbe/bsw@0
|
1272 for (i=0; i < lua_objlen(L, 1); i++) {
|
jbe/bsw@0
|
1273 lua_settop(L, 2);
|
jbe/bsw@0
|
1274 lua_rawgeti(L, 1, i+1); // 3
|
jbe/bsw@0
|
1275 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1276 lua_setfield(L, 3, "_class");
|
jbe/bsw@0
|
1277 }
|
jbe/bsw@0
|
1278 }
|
jbe@23
|
1279 // return first argument:
|
jbe/bsw@0
|
1280 lua_settop(L, 1);
|
jbe/bsw@0
|
1281 return 1;
|
jbe/bsw@0
|
1282 }
|
jbe/bsw@0
|
1283
|
jbe@23
|
1284 // library function "new_class":
|
jbe/bsw@0
|
1285 static int mondelefant_new_class(lua_State *L) {
|
jbe@23
|
1286 // use first argument as template or create new table:
|
jbe/bsw@0
|
1287 lua_settop(L, 1);
|
jbe/bsw@0
|
1288 if (!lua_toboolean(L, 1)) {
|
jbe/bsw@0
|
1289 lua_settop(L, 0);
|
jbe/bsw@0
|
1290 lua_newtable(L); // 1
|
jbe/bsw@0
|
1291 }
|
jbe@23
|
1292 // set meta-table for database classes (models):
|
jbe/bsw@0
|
1293 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 2
|
jbe/bsw@0
|
1294 lua_setmetatable(L, 1);
|
jbe@23
|
1295 // check, if "prototype" attribute is not set:
|
jbe/bsw@0
|
1296 lua_pushliteral(L, "prototype"); // 2
|
jbe/bsw@0
|
1297 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1298 if (!lua_toboolean(L, 2)) {
|
jbe@23
|
1299 // set "prototype" attribute to default prototype:
|
jbe/bsw@0
|
1300 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1301 lua_getfield(L,
|
jbe/bsw@0
|
1302 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1303 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1304 ); // 4
|
jbe/bsw@0
|
1305 lua_rawset(L, 1);
|
jbe/bsw@0
|
1306 }
|
jbe@23
|
1307 // set "object" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1308 lua_settop(L, 1);
|
jbe/bsw@0
|
1309 lua_pushliteral(L, "object"); // 2
|
jbe/bsw@0
|
1310 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1311 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1312 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
1313 lua_newtable(L); // 4
|
jbe/bsw@0
|
1314 lua_rawset(L, 1);
|
jbe/bsw@0
|
1315 }
|
jbe@23
|
1316 // set "object_get" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1317 lua_settop(L, 1);
|
jbe/bsw@0
|
1318 lua_pushliteral(L, "object_get"); // 2
|
jbe/bsw@0
|
1319 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1320 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1321 lua_pushliteral(L, "object_get"); // 3
|
jbe/bsw@0
|
1322 lua_newtable(L); // 4
|
jbe/bsw@0
|
1323 lua_rawset(L, 1);
|
jbe/bsw@0
|
1324 }
|
jbe@23
|
1325 // set "object_set" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1326 lua_settop(L, 1);
|
jbe/bsw@0
|
1327 lua_pushliteral(L, "object_set"); // 2
|
jbe/bsw@0
|
1328 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1329 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1330 lua_pushliteral(L, "object_set"); // 3
|
jbe/bsw@0
|
1331 lua_newtable(L); // 4
|
jbe/bsw@0
|
1332 lua_rawset(L, 1);
|
jbe/bsw@0
|
1333 }
|
jbe@23
|
1334 // set "list" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1335 lua_settop(L, 1);
|
jbe/bsw@0
|
1336 lua_pushliteral(L, "list"); // 2
|
jbe/bsw@0
|
1337 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1338 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1339 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
1340 lua_newtable(L); // 4
|
jbe/bsw@0
|
1341 lua_rawset(L, 1);
|
jbe/bsw@0
|
1342 }
|
jbe@23
|
1343 // set "references" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1344 lua_settop(L, 1);
|
jbe/bsw@0
|
1345 lua_pushliteral(L, "references"); // 2
|
jbe/bsw@0
|
1346 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1347 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1348 lua_pushliteral(L, "references"); // 3
|
jbe/bsw@0
|
1349 lua_newtable(L); // 4
|
jbe/bsw@0
|
1350 lua_rawset(L, 1);
|
jbe/bsw@0
|
1351 }
|
jbe@23
|
1352 // set "foreign_keys" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1353 lua_settop(L, 1);
|
jbe/bsw@0
|
1354 lua_pushliteral(L, "foreign_keys"); // 2
|
jbe/bsw@0
|
1355 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1356 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1357 lua_pushliteral(L, "foreign_keys"); // 3
|
jbe/bsw@0
|
1358 lua_newtable(L); // 4
|
jbe/bsw@0
|
1359 lua_rawset(L, 1);
|
jbe/bsw@0
|
1360 }
|
jbe@23
|
1361 // return table:
|
jbe/bsw@0
|
1362 lua_settop(L, 1);
|
jbe/bsw@0
|
1363 return 1;
|
jbe/bsw@0
|
1364 }
|
jbe/bsw@0
|
1365
|
jbe@23
|
1366 // method "get_reference" of classes (models):
|
jbe/bsw@0
|
1367 static int mondelefant_class_get_reference(lua_State *L) {
|
jbe/bsw@0
|
1368 lua_settop(L, 2);
|
jbe/bsw@0
|
1369 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1370 // get "references" table:
|
jbe/bsw@0
|
1371 lua_getfield(L, 1, "references"); // 3
|
jbe@23
|
1372 // perform lookup:
|
jbe/bsw@0
|
1373 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1374 lua_gettable(L, 3); // 4
|
jbe@23
|
1375 // return result, if lookup was successful:
|
jbe/bsw@0
|
1376 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1377 // replace current table by its prototype:
|
jbe/bsw@0
|
1378 lua_settop(L, 2);
|
jbe/bsw@0
|
1379 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1380 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1381 lua_replace(L, 1);
|
jbe/bsw@0
|
1382 }
|
jbe@23
|
1383 // return nothing:
|
jbe/bsw@0
|
1384 return 0;
|
jbe/bsw@0
|
1385 }
|
jbe/bsw@0
|
1386
|
jbe@23
|
1387 // method "iterate_over_references" of classes (models):
|
jbe/bsw@0
|
1388 static int mondelefant_class_iterate_over_references(lua_State *L) {
|
jbe/bsw@0
|
1389 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
|
jbe/bsw@0
|
1390 }
|
jbe/bsw@0
|
1391
|
jbe@23
|
1392 // method "get_foreign_key_reference_name" of classes (models):
|
jbe/bsw@0
|
1393 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
|
jbe/bsw@0
|
1394 lua_settop(L, 2);
|
jbe/bsw@0
|
1395 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1396 // get "foreign_keys" table:
|
jbe/bsw@0
|
1397 lua_getfield(L, 1, "foreign_keys"); // 3
|
jbe@23
|
1398 // perform lookup:
|
jbe/bsw@0
|
1399 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1400 lua_gettable(L, 3); // 4
|
jbe@23
|
1401 // return result, if lookup was successful:
|
jbe/bsw@0
|
1402 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1403 // replace current table by its prototype:
|
jbe/bsw@0
|
1404 lua_settop(L, 2);
|
jbe/bsw@0
|
1405 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1406 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1407 lua_replace(L, 1);
|
jbe/bsw@0
|
1408 }
|
jbe@23
|
1409 // return nothing:
|
jbe/bsw@0
|
1410 return 0;
|
jbe/bsw@0
|
1411 }
|
jbe/bsw@0
|
1412
|
jbe@23
|
1413 // meta-method "__index" of database result lists and objects:
|
jbe/bsw@0
|
1414 static int mondelefant_result_index(lua_State *L) {
|
jbe/bsw@0
|
1415 const char *result_type;
|
jbe@23
|
1416 // only lookup, when key is a string not beginning with an underscore:
|
jbe/bsw@0
|
1417 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe@23
|
1418 return 0;
|
jbe/bsw@0
|
1419 }
|
jbe@23
|
1420 // get value of "_class" attribute, or default class, when unset:
|
jbe@23
|
1421 lua_settop(L, 2);
|
jbe/bsw@0
|
1422 lua_getfield(L, 1, "_class"); // 3
|
jbe/bsw@0
|
1423 if (!lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1424 lua_settop(L, 2);
|
jbe/bsw@0
|
1425 lua_getfield(L,
|
jbe/bsw@0
|
1426 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1427 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1428 ); // 3
|
jbe/bsw@0
|
1429 }
|
jbe@23
|
1430 // get value of "_type" attribute:
|
jbe/bsw@0
|
1431 lua_getfield(L, 1, "_type"); // 4
|
jbe/bsw@0
|
1432 result_type = lua_tostring(L, 4);
|
jbe@23
|
1433 // different lookup for lists and objects:
|
jbe@23
|
1434 if (result_type && !strcmp(result_type, "object")) { // object
|
jbe/bsw@0
|
1435 lua_settop(L, 3);
|
jbe/bsw@0
|
1436 // try inherited attributes, methods or getter functions:
|
jbe/bsw@0
|
1437 while (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1438 lua_getfield(L, 3, "object"); // 4
|
jbe/bsw@0
|
1439 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1440 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
1441 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
1442 lua_settop(L, 3);
|
jbe/bsw@0
|
1443 lua_getfield(L, 3, "object_get"); // 4
|
jbe/bsw@0
|
1444 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1445 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
1446 if (lua_toboolean(L, 5)) {
|
jbe/bsw@0
|
1447 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
1448 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
1449 return 1;
|
jbe/bsw@0
|
1450 }
|
jbe/bsw@0
|
1451 lua_settop(L, 3);
|
jbe/bsw@0
|
1452 lua_pushliteral(L, "prototype"); // 4
|
jbe/bsw@0
|
1453 lua_rawget(L, 3); // 4
|
jbe/bsw@0
|
1454 lua_replace(L, 3);
|
jbe/bsw@0
|
1455 }
|
jbe/bsw@0
|
1456 lua_settop(L, 2);
|
jbe/bsw@0
|
1457 // try primary keys of referenced objects:
|
jbe/bsw@0
|
1458 lua_pushcfunction(L,
|
jbe/bsw@0
|
1459 mondelefant_class_get_foreign_key_reference_name
|
jbe/bsw@0
|
1460 ); // 3
|
jbe/bsw@0
|
1461 lua_getfield(L, 1, "_class"); // 4
|
jbe/bsw@0
|
1462 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1463 lua_call(L, 2, 1); // 3
|
jbe/bsw@0
|
1464 if (!lua_isnil(L, 3)) {
|
jbe/bsw@0
|
1465 // reference name at stack position 3
|
jbe/bsw@0
|
1466 lua_pushcfunction(L, mondelefant_class_get_reference); // 4
|
jbe/bsw@0
|
1467 lua_getfield(L, 1, "_class"); // 5
|
jbe/bsw@0
|
1468 lua_pushvalue(L, 3); // 6
|
jbe/bsw@0
|
1469 lua_call(L, 2, 1); // reference info at stack position 4
|
jbe/bsw@0
|
1470 lua_getfield(L, 1, "_ref"); // 5
|
jbe/bsw@0
|
1471 lua_getfield(L, 4, "ref"); // 6
|
jbe/bsw@0
|
1472 lua_gettable(L, 5); // 6
|
jbe/bsw@0
|
1473 if (!lua_isnil(L, 6)) {
|
jbe/bsw@0
|
1474 if (lua_toboolean(L, 6)) {
|
jbe/bsw@0
|
1475 lua_getfield(L, 4, "that_key"); // 7
|
jbe/bsw@0
|
1476 if (lua_isnil(L, 7)) {
|
jbe/bsw@0
|
1477 return luaL_error(L, "Missing 'that_key' entry in model reference.");
|
jbe/bsw@0
|
1478 }
|
jbe/bsw@0
|
1479 lua_gettable(L, 6); // 7
|
jbe/bsw@0
|
1480 } else {
|
jbe/bsw@0
|
1481 lua_pushnil(L);
|
jbe/bsw@0
|
1482 }
|
jbe/bsw@0
|
1483 return 1;
|
jbe/bsw@0
|
1484 }
|
jbe/bsw@0
|
1485 }
|
jbe/bsw@0
|
1486 lua_settop(L, 2);
|
jbe/bsw@0
|
1487 // try normal data field info:
|
jbe/bsw@0
|
1488 lua_getfield(L, 1, "_data"); // 3
|
jbe/bsw@0
|
1489 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1490 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1491 if (!lua_isnil(L, 4)) return 1;
|
jbe/bsw@0
|
1492 lua_settop(L, 2);
|
jbe/bsw@0
|
1493 // try cached referenced object (or cached NULL reference):
|
jbe/bsw@0
|
1494 lua_getfield(L, 1, "_ref"); // 3
|
jbe/bsw@0
|
1495 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1496 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1497 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1498 lua_pushnil(L);
|
jbe/bsw@0
|
1499 return 1;
|
jbe/bsw@0
|
1500 } else if (!lua_isnil(L, 4)) {
|
jbe/bsw@0
|
1501 return 1;
|
jbe/bsw@0
|
1502 }
|
jbe/bsw@0
|
1503 lua_settop(L, 2);
|
jbe/bsw@0
|
1504 // try to load a referenced object:
|
jbe/bsw@0
|
1505 lua_pushcfunction(L, mondelefant_class_get_reference); // 3
|
jbe/bsw@0
|
1506 lua_getfield(L, 1, "_class"); // 4
|
jbe/bsw@0
|
1507 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1508 lua_call(L, 2, 1); // 3
|
jbe/bsw@0
|
1509 if (!lua_isnil(L, 3)) {
|
jbe/bsw@0
|
1510 lua_settop(L, 2);
|
jbe/bsw@0
|
1511 lua_getfield(L, 1, "load"); // 3
|
jbe/bsw@0
|
1512 lua_pushvalue(L, 1); // 4 (self)
|
jbe/bsw@0
|
1513 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1514 lua_call(L, 2, 0);
|
jbe/bsw@0
|
1515 lua_settop(L, 2);
|
jbe/bsw@0
|
1516 lua_getfield(L, 1, "_ref"); // 3
|
jbe/bsw@0
|
1517 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1518 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1519 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
|
jbe/bsw@0
|
1520 return 1;
|
jbe/bsw@0
|
1521 }
|
jbe/bsw@0
|
1522 return 0;
|
jbe@23
|
1523 } else if (result_type && !strcmp(result_type, "list")) { // list
|
jbe/bsw@0
|
1524 lua_settop(L, 3);
|
jbe/bsw@0
|
1525 // try inherited list attributes or methods:
|
jbe/bsw@0
|
1526 while (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1527 lua_getfield(L, 3, "list"); // 4
|
jbe/bsw@0
|
1528 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1529 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
1530 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
1531 lua_settop(L, 3);
|
jbe/bsw@0
|
1532 lua_pushliteral(L, "prototype"); // 4
|
jbe/bsw@0
|
1533 lua_rawget(L, 3); // 4
|
jbe/bsw@0
|
1534 lua_replace(L, 3);
|
jbe/bsw@0
|
1535 }
|
jbe/bsw@0
|
1536 }
|
jbe@23
|
1537 // return nothing:
|
jbe/bsw@0
|
1538 return 0;
|
jbe/bsw@0
|
1539 }
|
jbe/bsw@0
|
1540
|
jbe@23
|
1541 // meta-method "__newindex" of database result lists and objects:
|
jbe/bsw@0
|
1542 static int mondelefant_result_newindex(lua_State *L) {
|
jbe/bsw@0
|
1543 const char *result_type;
|
jbe@23
|
1544 // perform rawset, unless key is a string not starting with underscore:
|
jbe/bsw@0
|
1545 lua_settop(L, 3);
|
jbe/bsw@0
|
1546 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe/bsw@0
|
1547 lua_rawset(L, 1);
|
jbe/bsw@0
|
1548 return 1;
|
jbe/bsw@0
|
1549 }
|
jbe@23
|
1550 // get value of "_class" attribute, or default class, when unset:
|
jbe/bsw@0
|
1551 lua_getfield(L, 1, "_class"); // 4
|
jbe/bsw@0
|
1552 if (!lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1553 lua_settop(L, 3);
|
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 ); // 4
|
jbe/bsw@0
|
1558 }
|
jbe@23
|
1559 // get value of "_type" attribute:
|
jbe/bsw@0
|
1560 lua_getfield(L, 1, "_type"); // 5
|
jbe/bsw@0
|
1561 result_type = lua_tostring(L, 5);
|
jbe@23
|
1562 // distinguish between lists and objects:
|
jbe@23
|
1563 if (result_type && !strcmp(result_type, "object")) { // objects
|
jbe/bsw@0
|
1564 lua_settop(L, 4);
|
jbe/bsw@0
|
1565 // try object setter functions:
|
jbe/bsw@0
|
1566 while (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1567 lua_getfield(L, 4, "object_set"); // 5
|
jbe/bsw@0
|
1568 lua_pushvalue(L, 2); // 6
|
jbe/bsw@0
|
1569 lua_gettable(L, 5); // 6
|
jbe/bsw@0
|
1570 if (lua_toboolean(L, 6)) {
|
jbe/bsw@0
|
1571 lua_pushvalue(L, 1); // 7
|
jbe/bsw@0
|
1572 lua_pushvalue(L, 3); // 8
|
jbe/bsw@0
|
1573 lua_call(L, 2, 0);
|
jbe/bsw@0
|
1574 return 0;
|
jbe/bsw@0
|
1575 }
|
jbe/bsw@0
|
1576 lua_settop(L, 4);
|
jbe/bsw@0
|
1577 lua_pushliteral(L, "prototype"); // 5
|
jbe/bsw@0
|
1578 lua_rawget(L, 4); // 5
|
jbe/bsw@0
|
1579 lua_replace(L, 4);
|
jbe/bsw@0
|
1580 }
|
jbe/bsw@0
|
1581 lua_settop(L, 3);
|
jbe/bsw@0
|
1582 // check, if a object reference is changed:
|
jbe/bsw@0
|
1583 lua_pushcfunction(L, mondelefant_class_get_reference); // 4
|
jbe/bsw@0
|
1584 lua_getfield(L, 1, "_class"); // 5
|
jbe/bsw@0
|
1585 lua_pushvalue(L, 2); // 6
|
jbe/bsw@0
|
1586 lua_call(L, 2, 1); // 4
|
jbe/bsw@0
|
1587 if (!lua_isnil(L, 4)) {
|
jbe/bsw@0
|
1588 // store object in _ref table (use false for nil): // TODO: use special object instead of false
|
jbe/bsw@0
|
1589 lua_getfield(L, 1, "_ref"); // 5
|
jbe/bsw@0
|
1590 lua_pushvalue(L, 2); // 6
|
jbe/bsw@0
|
1591 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 7
|
jbe/bsw@0
|
1592 else lua_pushvalue(L, 3); // 7
|
jbe/bsw@0
|
1593 lua_settable(L, 5);
|
jbe/bsw@0
|
1594 lua_settop(L, 4);
|
jbe/bsw@0
|
1595 // delete referencing key from _data table:
|
jbe/bsw@0
|
1596 lua_getfield(L, 4, "this_key"); // 5
|
jbe/bsw@0
|
1597 if (lua_isnil(L, 5)) {
|
jbe/bsw@0
|
1598 return luaL_error(L, "Missing 'this_key' entry in model reference.");
|
jbe/bsw@0
|
1599 }
|
jbe/bsw@0
|
1600 lua_getfield(L, 1, "_data"); // 6
|
jbe/bsw@0
|
1601 lua_pushvalue(L, 5); // 7
|
jbe/bsw@0
|
1602 lua_pushnil(L); // 8
|
jbe/bsw@0
|
1603 lua_settable(L, 6);
|
jbe/bsw@0
|
1604 lua_settop(L, 5);
|
jbe/bsw@0
|
1605 lua_getfield(L, 1, "_dirty"); // 6
|
jbe/bsw@0
|
1606 lua_pushvalue(L, 5); // 7
|
jbe/bsw@0
|
1607 lua_pushboolean(L, 1); // 8
|
jbe/bsw@0
|
1608 lua_settable(L, 6);
|
jbe/bsw@0
|
1609 return 0;
|
jbe/bsw@0
|
1610 }
|
jbe/bsw@0
|
1611 lua_settop(L, 3);
|
jbe/bsw@0
|
1612 // store value in data field info:
|
jbe/bsw@0
|
1613 lua_getfield(L, 1, "_data"); // 4
|
jbe/bsw@0
|
1614 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1615 lua_pushvalue(L, 3); // 6
|
jbe/bsw@0
|
1616 lua_settable(L, 4);
|
jbe/bsw@0
|
1617 lua_settop(L, 3);
|
jbe/bsw@0
|
1618 // mark field as dirty (needs to be UPDATEd on save):
|
jbe/bsw@0
|
1619 lua_getfield(L, 1, "_dirty"); // 4
|
jbe/bsw@0
|
1620 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1621 lua_pushboolean(L, 1); // 6
|
jbe/bsw@0
|
1622 lua_settable(L, 4);
|
jbe/bsw@0
|
1623 lua_settop(L, 3);
|
jbe/bsw@0
|
1624 // reset reference cache, if neccessary:
|
jbe/bsw@0
|
1625 lua_pushcfunction(L,
|
jbe/bsw@0
|
1626 mondelefant_class_get_foreign_key_reference_name
|
jbe/bsw@0
|
1627 ); // 4
|
jbe/bsw@0
|
1628 lua_getfield(L, 1, "_class"); // 5
|
jbe/bsw@0
|
1629 lua_pushvalue(L, 2); // 6
|
jbe/bsw@0
|
1630 lua_call(L, 2, 1); // 4
|
jbe/bsw@0
|
1631 if (!lua_isnil(L, 4)) {
|
jbe/bsw@0
|
1632 lua_getfield(L, 1, "_ref"); // 5
|
jbe/bsw@0
|
1633 lua_pushvalue(L, 4); // 6
|
jbe/bsw@0
|
1634 lua_pushnil(L); // 7
|
jbe/bsw@0
|
1635 lua_settable(L, 5);
|
jbe/bsw@0
|
1636 }
|
jbe/bsw@0
|
1637 return 0;
|
jbe@23
|
1638 } else { // non-objects (i.e. lists)
|
jbe@23
|
1639 // perform rawset:
|
jbe/bsw@0
|
1640 lua_settop(L, 3);
|
jbe/bsw@0
|
1641 lua_rawset(L, 1);
|
jbe/bsw@0
|
1642 return 0;
|
jbe/bsw@0
|
1643 }
|
jbe/bsw@0
|
1644 }
|
jbe/bsw@0
|
1645
|
jbe@23
|
1646 // meta-method "__index" of classes (models):
|
jbe/bsw@0
|
1647 static int mondelefant_class_index(lua_State *L) {
|
jbe@23
|
1648 // perform lookup in prototype:
|
jbe/bsw@0
|
1649 lua_settop(L, 2);
|
jbe/bsw@0
|
1650 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1651 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1652 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1653 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1654 return 1;
|
jbe/bsw@0
|
1655 }
|
jbe/bsw@0
|
1656
|
jbe@23
|
1657 // registration information for functions of library:
|
jbe/bsw@0
|
1658 static const struct luaL_Reg mondelefant_module_functions[] = {
|
jbe/bsw@0
|
1659 {"connect", mondelefant_connect},
|
jbe/bsw@0
|
1660 {"set_class", mondelefant_set_class},
|
jbe/bsw@0
|
1661 {"new_class", mondelefant_new_class},
|
jbe/bsw@0
|
1662 {NULL, NULL}
|
jbe/bsw@0
|
1663 };
|
jbe/bsw@0
|
1664
|
jbe@23
|
1665 // registration information for meta-methods of database connections:
|
jbe/bsw@0
|
1666 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
|
jbe/bsw@0
|
1667 {"__gc", mondelefant_conn_free},
|
jbe/bsw@0
|
1668 {"__index", mondelefant_conn_index},
|
jbe/bsw@0
|
1669 {"__newindex", mondelefant_conn_newindex},
|
jbe/bsw@0
|
1670 {NULL, NULL}
|
jbe/bsw@0
|
1671 };
|
jbe/bsw@0
|
1672
|
jbe@23
|
1673 // registration information for methods of database connections:
|
jbe/bsw@0
|
1674 static const struct luaL_Reg mondelefant_conn_methods[] = {
|
jbe/bsw@0
|
1675 {"close", mondelefant_conn_close},
|
jbe/bsw@0
|
1676 {"is_ok", mondelefant_conn_is_ok},
|
jbe/bsw@0
|
1677 {"get_transaction_status", mondelefant_conn_get_transaction_status},
|
jbe/bsw@0
|
1678 {"create_list", mondelefant_conn_create_list},
|
jbe/bsw@0
|
1679 {"create_object", mondelefant_conn_create_object},
|
jbe/bsw@0
|
1680 {"quote_string", mondelefant_conn_quote_string},
|
jbe/bsw@0
|
1681 {"quote_binary", mondelefant_conn_quote_binary},
|
jbe/bsw@0
|
1682 {"assemble_command", mondelefant_conn_assemble_command},
|
jbe/bsw@0
|
1683 {"try_query", mondelefant_conn_try_query},
|
jbe/bsw@0
|
1684 {"query", mondelefant_conn_query},
|
jbe/bsw@0
|
1685 {NULL, NULL}
|
jbe/bsw@0
|
1686 };
|
jbe/bsw@0
|
1687
|
jbe@23
|
1688 // registration information for meta-methods of error objects:
|
jbe/bsw@0
|
1689 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
|
jbe/bsw@0
|
1690 {NULL, NULL}
|
jbe/bsw@0
|
1691 };
|
jbe/bsw@0
|
1692
|
jbe@23
|
1693 // registration information for methods of error objects:
|
jbe/bsw@0
|
1694 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
|
jbe/bsw@0
|
1695 {"escalate", mondelefant_errorobject_escalate},
|
jbe/bsw@0
|
1696 {"is_kind_of", mondelefant_errorobject_is_kind_of},
|
jbe/bsw@0
|
1697 {NULL, NULL}
|
jbe/bsw@0
|
1698 };
|
jbe/bsw@0
|
1699
|
jbe@23
|
1700 // registration information for meta-methods of database result lists/objects:
|
jbe/bsw@0
|
1701 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
|
jbe/bsw@0
|
1702 {"__index", mondelefant_result_index},
|
jbe/bsw@0
|
1703 {"__newindex", mondelefant_result_newindex},
|
jbe/bsw@0
|
1704 {NULL, NULL}
|
jbe/bsw@0
|
1705 };
|
jbe/bsw@0
|
1706
|
jbe@23
|
1707 // registration information for methods of database result lists/objects:
|
jbe/bsw@0
|
1708 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
|
jbe/bsw@0
|
1709 {"__index", mondelefant_class_index},
|
jbe/bsw@0
|
1710 {NULL, NULL}
|
jbe/bsw@0
|
1711 };
|
jbe/bsw@0
|
1712
|
jbe@23
|
1713 // registration information for methods of classes (models):
|
jbe/bsw@0
|
1714 static const struct luaL_Reg mondelefant_class_methods[] = {
|
jbe/bsw@0
|
1715 {"get_reference", mondelefant_class_get_reference},
|
jbe/bsw@0
|
1716 {"iterate_over_references", mondelefant_class_iterate_over_references},
|
jbe/bsw@0
|
1717 {"get_foreign_key_reference_name",
|
jbe/bsw@0
|
1718 mondelefant_class_get_foreign_key_reference_name},
|
jbe/bsw@0
|
1719 {NULL, NULL}
|
jbe/bsw@0
|
1720 };
|
jbe/bsw@0
|
1721
|
jbe@23
|
1722 // registration information for methods of database result objects (not lists!):
|
jbe/bsw@0
|
1723 static const struct luaL_Reg mondelefant_object_methods[] = {
|
jbe/bsw@0
|
1724 {NULL, NULL}
|
jbe/bsw@0
|
1725 };
|
jbe/bsw@0
|
1726
|
jbe@23
|
1727 // registration information for methods of database result lists (not single objects!):
|
jbe/bsw@0
|
1728 static const struct luaL_Reg mondelefant_list_methods[] = {
|
jbe/bsw@0
|
1729 {NULL, NULL}
|
jbe/bsw@0
|
1730 };
|
jbe/bsw@0
|
1731
|
jbe@23
|
1732 // luaopen function to initialize/register library:
|
jbe/bsw@0
|
1733 int luaopen_mondelefant_native(lua_State *L) {
|
jbe/bsw@0
|
1734 lua_settop(L, 0);
|
jbe/bsw@0
|
1735 lua_newtable(L); // module at stack position 1
|
jbe/bsw@0
|
1736 luaL_register(L, NULL, mondelefant_module_functions);
|
jbe/bsw@0
|
1737
|
jbe/bsw@0
|
1738 lua_pushvalue(L, 1); // 2
|
jbe/bsw@0
|
1739 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
|
jbe/bsw@0
|
1740
|
jbe/bsw@0
|
1741 lua_newtable(L); // 2
|
jbe/bsw@0
|
1742 // NOTE: only PostgreSQL is supported yet:
|
jbe/bsw@0
|
1743 luaL_register(L, NULL, mondelefant_conn_methods);
|
jbe/bsw@0
|
1744 lua_setfield(L, 1, "postgresql_connection_prototype");
|
jbe/bsw@0
|
1745 lua_newtable(L); // 2
|
jbe/bsw@0
|
1746 lua_setfield(L, 1, "connection_prototype");
|
jbe/bsw@0
|
1747
|
jbe/bsw@0
|
1748 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
|
jbe/bsw@0
|
1749 luaL_register(L, NULL, mondelefant_conn_mt_functions);
|
jbe/bsw@0
|
1750 lua_settop(L, 1);
|
jbe/bsw@0
|
1751 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
|
jbe/bsw@0
|
1752 luaL_register(L, NULL, mondelefant_result_mt_functions);
|
jbe/bsw@0
|
1753 lua_setfield(L, 1, "result_metatable");
|
jbe/bsw@0
|
1754 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
|
jbe/bsw@0
|
1755 luaL_register(L, NULL, mondelefant_class_mt_functions);
|
jbe/bsw@0
|
1756 lua_setfield(L, 1, "class_metatable");
|
jbe/bsw@0
|
1757
|
jbe/bsw@0
|
1758 lua_newtable(L); // 2
|
jbe/bsw@0
|
1759 lua_newtable(L); // 3
|
jbe/bsw@0
|
1760 luaL_register(L, NULL, mondelefant_object_methods);
|
jbe/bsw@0
|
1761 lua_setfield(L, 2, "object");
|
jbe/bsw@0
|
1762 lua_newtable(L); // 3
|
jbe/bsw@0
|
1763 lua_setfield(L, 2, "object_get");
|
jbe/bsw@0
|
1764 lua_newtable(L); // 3
|
jbe/bsw@0
|
1765 lua_setfield(L, 2, "object_set");
|
jbe/bsw@0
|
1766 lua_newtable(L); // 3
|
jbe/bsw@0
|
1767 luaL_register(L, NULL, mondelefant_list_methods);
|
jbe/bsw@0
|
1768 lua_setfield(L, 2, "list");
|
jbe/bsw@0
|
1769 lua_newtable(L); // 3
|
jbe/bsw@0
|
1770 lua_setfield(L, 2, "references");
|
jbe/bsw@0
|
1771 lua_newtable(L); // 3
|
jbe/bsw@0
|
1772 lua_setfield(L, 2, "foreign_keys");
|
jbe/bsw@0
|
1773 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1774 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
|
jbe/bsw@0
|
1775 lua_setfield(L, 1, "class_prototype");
|
jbe/bsw@0
|
1776
|
jbe/bsw@0
|
1777 lua_newtable(L); // 2
|
jbe/bsw@0
|
1778 lua_pushliteral(L, "k"); // 3
|
jbe/bsw@0
|
1779 lua_setfield(L, 2, "__mode");
|
jbe/bsw@0
|
1780 lua_newtable(L); // 3
|
jbe/bsw@0
|
1781 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1782 lua_setmetatable(L, 3);
|
jbe/bsw@0
|
1783 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CONN_DATA_REGKEY);
|
jbe/bsw@0
|
1784 lua_settop(L, 1);
|
jbe/bsw@0
|
1785
|
jbe/bsw@0
|
1786 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
|
jbe/bsw@0
|
1787 luaL_register(L, NULL, mondelefant_errorobject_mt_functions);
|
jbe/bsw@0
|
1788 lua_newtable(L); // 3
|
jbe/bsw@0
|
1789 luaL_register(L, NULL, mondelefant_errorobject_methods);
|
jbe/bsw@0
|
1790 lua_setfield(L, 2, "__index");
|
jbe/bsw@0
|
1791 lua_setfield(L, 1, "errorobject_metatable");
|
jbe/bsw@0
|
1792
|
jbe/bsw@0
|
1793 return 1;
|
jbe/bsw@0
|
1794 }
|