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jbe/bsw@0
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1 #include <lua.h>
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jbe/bsw@0
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2 #include <lauxlib.h>
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jbe/bsw@0
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3 #include <libpq-fe.h>
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jbe/bsw@0
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4 #include <postgres.h>
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jbe/bsw@0
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5 #include <catalog/pg_type.h>
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jbe/bsw@0
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6 #include <stdint.h>
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jbe@393
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7 #include <time.h>
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jbe/bsw@0
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8
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jbe@23
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9 // NOTE: Comments with format "// <number>" denote the Lua stack position
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jbe@23
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10
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jbe@23
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11 // prefix for all Lua registry entries of this library:
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jbe@402
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12 #define MONDELEFANT_REGKEY "mondelefant_"
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jbe/bsw@0
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13
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jbe@23
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14 // registry key of module "mondelefant_native":
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jbe@23
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15 #define MONDELEFANT_MODULE_REGKEY (MONDELEFANT_REGKEY "module")
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jbe@23
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16 // registry key of meta-table for database connections:
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jbe@23
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17 #define MONDELEFANT_CONN_MT_REGKEY (MONDELEFANT_REGKEY "connection")
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jbe@23
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18 // registry key of meta-table for database result lists and objects:
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jbe@23
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19 #define MONDELEFANT_RESULT_MT_REGKEY (MONDELEFANT_REGKEY "result")
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jbe@23
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20 // registry key of meta-table for database error objects:
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jbe@23
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21 #define MONDELEFANT_ERROROBJECT_MT_REGKEY (MONDELEFANT_REGKEY "errorobject")
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jbe@23
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22 // registry key of meta-table for models (named classes here):
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jbe@23
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23 #define MONDELEFANT_CLASS_MT_REGKEY (MONDELEFANT_REGKEY "class")
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jbe@23
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24 // registry key of default prototype for models/classes:
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jbe@23
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25 #define MONDELEFANT_CLASS_PROTO_REGKEY (MONDELEFANT_REGKEY "class_proto")
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jbe/bsw@0
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26
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jbe@23
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27 // C-structure for database connection userdata:
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jbe/bsw@0
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28 typedef struct {
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jbe/bsw@0
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29 PGconn *pgconn;
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jbe/bsw@0
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30 int server_encoding;
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jbe@408
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31 void *todo_PQfreemem;
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jbe@408
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32 PGresult *todo_PQclear;
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jbe/bsw@0
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33 } mondelefant_conn_t;
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jbe@23
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34 #define MONDELEFANT_SERVER_ENCODING_ASCII 0
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jbe@23
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35 #define MONDELEFANT_SERVER_ENCODING_UTF8 1
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jbe/bsw@0
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36
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jbe@23
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37 // transform codepoint-position to byte-position for a given UTF-8 string:
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jbe/bsw@0
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38 static size_t utf8_position_to_byte(const char *str, size_t utf8pos) {
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jbe/bsw@0
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39 size_t bytepos;
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jbe/bsw@0
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40 for (bytepos = 0; utf8pos > 0; bytepos++) {
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jbe/bsw@0
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41 uint8_t c;
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jbe/bsw@0
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42 c = ((const uint8_t *)str)[bytepos];
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jbe/bsw@0
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43 if (!c) break;
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jbe/bsw@0
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44 if (c <= 0x7f || c >= 0xc0) utf8pos--;
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jbe/bsw@0
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45 }
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jbe/bsw@0
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46 return bytepos;
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jbe/bsw@0
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47 }
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jbe/bsw@0
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48
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jbe@23
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49 // PostgreSQL's OID for binary data type (bytea):
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jbe/bsw@0
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50 #define MONDELEFANT_POSTGRESQL_BINARY_OID ((Oid)17)
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jbe/bsw@0
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51
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jbe@23
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52 // mapping a PostgreSQL type given by its OID to a string identifier:
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jbe/bsw@0
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53 static const char *mondelefant_oid_to_typestr(Oid oid) {
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jbe/bsw@0
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54 switch (oid) {
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jbe/bsw@0
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55 case 16: return "bool";
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jbe/bsw@0
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56 case 17: return "bytea";
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jbe/bsw@0
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57 case 18: return "char";
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jbe/bsw@0
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58 case 19: return "name";
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jbe/bsw@0
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59 case 20: return "int8";
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jbe/bsw@0
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60 case 21: return "int2";
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jbe/bsw@0
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61 case 23: return "int4";
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jbe/bsw@0
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62 case 25: return "text";
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jbe/bsw@0
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63 case 26: return "oid";
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jbe/bsw@0
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64 case 27: return "tid";
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jbe/bsw@0
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65 case 28: return "xid";
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jbe/bsw@0
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66 case 29: return "cid";
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jbe@176
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67 case 114: return "json";
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jbe/bsw@0
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68 case 600: return "point";
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jbe/bsw@0
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69 case 601: return "lseg";
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jbe/bsw@0
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70 case 602: return "path";
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jbe/bsw@0
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71 case 603: return "box";
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jbe/bsw@0
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72 case 604: return "polygon";
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jbe/bsw@0
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73 case 628: return "line";
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jbe/bsw@0
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74 case 700: return "float4";
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jbe/bsw@0
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75 case 701: return "float8";
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jbe/bsw@0
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76 case 705: return "unknown";
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jbe/bsw@0
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77 case 718: return "circle";
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jbe/bsw@0
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78 case 790: return "money";
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jbe/bsw@0
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79 case 829: return "macaddr";
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jbe/bsw@0
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80 case 869: return "inet";
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jbe/bsw@0
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81 case 650: return "cidr";
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jbe/bsw@0
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82 case 1042: return "bpchar";
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jbe/bsw@0
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83 case 1043: return "varchar";
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jbe/bsw@0
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84 case 1082: return "date";
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jbe/bsw@0
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85 case 1083: return "time";
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jbe/bsw@0
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86 case 1114: return "timestamp";
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jbe/bsw@0
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87 case 1184: return "timestamptz";
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jbe/bsw@0
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88 case 1186: return "interval";
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jbe/bsw@0
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89 case 1266: return "timetz";
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jbe/bsw@0
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90 case 1560: return "bit";
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jbe/bsw@0
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91 case 1562: return "varbit";
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jbe/bsw@0
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92 case 1700: return "numeric";
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jbe@176
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93 case 3802: return "jsonb";
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jbe/bsw@0
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94 default: return NULL;
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jbe/bsw@0
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95 }
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jbe/bsw@0
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96 }
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jbe/bsw@0
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97
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jbe@23
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98 // This library maps PostgreSQL's error codes to CamelCase string
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jbe@23
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99 // identifiers, which consist of CamelCase identifiers and are seperated
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jbe@23
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100 // by dots (".") (no leading or trailing dots).
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jbe@23
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101 // There are additional error identifiers which do not have a corresponding
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jbe@23
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102 // PostgreSQL error associated with it.
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jbe@23
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103
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jbe@23
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104 // matching start of local variable 'pgcode' against string 'incode',
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jbe@23
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105 // returning string 'outcode' on match:
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jbe/bsw@0
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106 #define mondelefant_errcode_item(incode, outcode) \
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jbe/bsw@0
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107 if (!strncmp(pgcode, (incode), strlen(incode))) return outcode; else
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jbe/bsw@0
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108
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jbe@23
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109 // additional error identifiers without corresponding PostgreSQL error:
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jbe/bsw@0
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110 #define MONDELEFANT_ERRCODE_UNKNOWN "unknown"
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jbe/bsw@0
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111 #define MONDELEFANT_ERRCODE_CONNECTION "ConnectionException"
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jbe/bsw@0
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112 #define MONDELEFANT_ERRCODE_RESULTCOUNT_LOW "WrongResultSetCount.ResultSetMissing"
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jbe/bsw@0
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113 #define MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH "WrongResultSetCount.TooManyResults"
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jbe/bsw@0
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114 #define MONDELEFANT_ERRCODE_QUERY1_NO_ROWS "NoData.OneRowExpected"
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jbe/bsw@0
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115 #define MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS "CardinalityViolation.OneRowExpected"
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jbe/bsw@0
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116
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jbe@23
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117 // mapping PostgreSQL error code to error code as returned by this library:
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jbe/bsw@0
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118 static const char *mondelefant_translate_errcode(const char *pgcode) {
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jbe/bsw@0
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119 if (!pgcode) abort(); // should not happen
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jbe/bsw@0
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120 mondelefant_errcode_item("02", "NoData")
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jbe/bsw@0
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121 mondelefant_errcode_item("03", "SqlStatementNotYetComplete")
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jbe/bsw@0
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122 mondelefant_errcode_item("08", "ConnectionException")
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jbe/bsw@0
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123 mondelefant_errcode_item("09", "TriggeredActionException")
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jbe/bsw@0
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124 mondelefant_errcode_item("0A", "FeatureNotSupported")
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jbe/bsw@0
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125 mondelefant_errcode_item("0B", "InvalidTransactionInitiation")
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jbe/bsw@0
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126 mondelefant_errcode_item("0F", "LocatorException")
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jbe/bsw@0
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127 mondelefant_errcode_item("0L", "InvalidGrantor")
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jbe/bsw@0
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128 mondelefant_errcode_item("0P", "InvalidRoleSpecification")
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jbe/bsw@0
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129 mondelefant_errcode_item("21", "CardinalityViolation")
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jbe/bsw@0
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130 mondelefant_errcode_item("22", "DataException")
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jbe/bsw@0
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131 mondelefant_errcode_item("23001", "IntegrityConstraintViolation.RestrictViolation")
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jbe/bsw@0
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132 mondelefant_errcode_item("23502", "IntegrityConstraintViolation.NotNullViolation")
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jbe/bsw@0
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133 mondelefant_errcode_item("23503", "IntegrityConstraintViolation.ForeignKeyViolation")
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jbe/bsw@0
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134 mondelefant_errcode_item("23505", "IntegrityConstraintViolation.UniqueViolation")
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jbe/bsw@0
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135 mondelefant_errcode_item("23514", "IntegrityConstraintViolation.CheckViolation")
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jbe/bsw@0
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136 mondelefant_errcode_item("23", "IntegrityConstraintViolation")
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jbe/bsw@0
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137 mondelefant_errcode_item("24", "InvalidCursorState")
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jbe/bsw@0
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138 mondelefant_errcode_item("25", "InvalidTransactionState")
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jbe/bsw@0
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139 mondelefant_errcode_item("26", "InvalidSqlStatementName")
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jbe/bsw@0
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140 mondelefant_errcode_item("27", "TriggeredDataChangeViolation")
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jbe/bsw@0
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141 mondelefant_errcode_item("28", "InvalidAuthorizationSpecification")
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jbe/bsw@0
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142 mondelefant_errcode_item("2B", "DependentPrivilegeDescriptorsStillExist")
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jbe/bsw@0
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143 mondelefant_errcode_item("2D", "InvalidTransactionTermination")
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jbe/bsw@0
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144 mondelefant_errcode_item("2F", "SqlRoutineException")
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jbe/bsw@0
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145 mondelefant_errcode_item("34", "InvalidCursorName")
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jbe/bsw@0
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146 mondelefant_errcode_item("38", "ExternalRoutineException")
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jbe/bsw@0
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147 mondelefant_errcode_item("39", "ExternalRoutineInvocationException")
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jbe/bsw@0
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148 mondelefant_errcode_item("3B", "SavepointException")
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jbe/bsw@0
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149 mondelefant_errcode_item("3D", "InvalidCatalogName")
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jbe/bsw@0
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150 mondelefant_errcode_item("3F", "InvalidSchemaName")
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jbe/bsw@0
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151 mondelefant_errcode_item("40", "TransactionRollback")
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jbe/bsw@0
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152 mondelefant_errcode_item("42", "SyntaxErrorOrAccessRuleViolation")
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jbe/bsw@0
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153 mondelefant_errcode_item("44", "WithCheckOptionViolation")
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jbe/bsw@0
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154 mondelefant_errcode_item("53", "InsufficientResources")
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jbe/bsw@0
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155 mondelefant_errcode_item("54", "ProgramLimitExceeded")
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jbe/bsw@0
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156 mondelefant_errcode_item("55", "ObjectNotInPrerequisiteState")
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jbe/bsw@0
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157 mondelefant_errcode_item("57", "OperatorIntervention")
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jbe/bsw@0
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158 mondelefant_errcode_item("58", "SystemError")
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jbe/bsw@0
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159 mondelefant_errcode_item("F0", "ConfigurationFileError")
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jbe/bsw@0
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160 mondelefant_errcode_item("P0", "PlpgsqlError")
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jbe/bsw@0
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161 mondelefant_errcode_item("XX", "InternalError")
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jbe/bsw@0
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162 return "unknown";
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jbe/bsw@0
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163 }
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jbe/bsw@0
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164
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jbe@23
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165 // C-function, checking if a given error code (as defined by this library)
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jbe@23
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166 // is belonging to a certain class of errors (strings are equal or error
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jbe@23
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167 // code begins with error class followed by a dot):
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jbe/bsw@0
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168 static int mondelefant_check_error_class(
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jbe/bsw@0
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169 const char *errcode, const char *errclass
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jbe/bsw@0
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170 ) {
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jbe/bsw@0
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171 size_t i = 0;
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jbe/bsw@0
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172 while (1) {
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jbe/bsw@0
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173 if (errclass[i] == 0) {
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jbe/bsw@0
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174 if (errcode[i] == 0 || errcode[i] == '.') return 1;
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jbe/bsw@0
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175 else return 0;
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jbe/bsw@0
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176 }
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jbe/bsw@0
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177 if (errcode[i] != errclass[i]) return 0;
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jbe/bsw@0
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178 i++;
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jbe/bsw@0
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179 }
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jbe/bsw@0
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180 }
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jbe/bsw@0
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181
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jbe@23
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182 // 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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183 static void mondelefant_push_first_line(lua_State *L, const char *str) {
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jbe/bsw@0
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184 size_t i = 0;
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jbe/bsw@0
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185 if (!str) abort(); // should not happen
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jbe/bsw@0
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186 while (1) {
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jbe@397
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187 char c = str[i];
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jbe@397
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188 if (c == '\n' || c == '\r' || c == 0) {
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jbe@397
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189 lua_pushlstring(L, str, i);
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jbe@397
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190 return;
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jbe@397
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191 }
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jbe/bsw@0
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192 i++;
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jbe@397
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193 }
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jbe/bsw@0
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194 }
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jbe/bsw@0
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195
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jbe@23
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196 // "connect" function of library, which establishes a database connection
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jbe@23
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197 // and returns a database connection handle:
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jbe/bsw@0
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198 static int mondelefant_connect(lua_State *L) {
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jbe@23
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199 const char *conninfo; // string for 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@402
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201 // check if string is given as first argument:
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jbe@402
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202 if (lua_type(L, 1) != LUA_TSTRING) {
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jbe@402
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203 // expect a table as first argument if no string is given:
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jbe@402
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204 luaL_checktype(L, 1, LUA_TTABLE);
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jbe@406
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205 // extract conninfo string for PQconnectdb if possible:
|
jbe@406
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206 lua_getfield(L, 1, "conninfo");
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jbe@406
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207 if (!lua_isnil(L, -1)) {
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jbe@402
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208 // if yes, use that value but check its type:
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jbe@406
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209 luaL_argcheck(L, lua_type(L, -1) == LUA_TSTRING, 1, "\"conninfo\" value is not a string");
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jbe@402
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210 } else {
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jbe@402
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211 // otherwise assemble conninfo string from the named options:
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jbe@402
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212 luaL_Buffer buf;
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jbe@40
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213 int need_seperator = 0;
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jbe@402
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214 const char *value;
|
jbe@402
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215 size_t value_len;
|
jbe@402
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216 size_t value_pos = 0;
|
jbe@402
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217 lua_settop(L, 1);
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jbe@402
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218 lua_pushnil(L); // slot for key at stack position 2
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jbe@402
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219 lua_pushnil(L); // slot for value at stack position 3
|
jbe@402
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220 luaL_buffinit(L, &buf);
|
jbe@40
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221 while (lua_pushvalue(L, 2), lua_next(L, 1)) {
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jbe@402
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222 luaL_argcheck(L, lua_isstring(L, -2), 1, "key in table is not a string");
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jbe@402
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223 luaL_argcheck(L, lua_isstring(L, -1), 1, "value in table is not a string");
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jbe@402
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224 value = lua_tolstring(L, -1, &value_len);
|
jbe@40
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225 lua_replace(L, 3);
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jbe@402
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226 lua_pop(L, 1);
|
jbe@40
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227 lua_replace(L, 2);
|
jbe@402
|
228 if (need_seperator) luaL_addchar(&buf, ' ');
|
jbe@40
|
229 // NOTE: numbers will be converted to strings automatically here,
|
jbe@40
|
230 // but perhaps this will change in future versions of lua
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jbe@40
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231 lua_pushvalue(L, 2);
|
jbe@402
|
232 luaL_addvalue(&buf);
|
jbe@402
|
233 luaL_addchar(&buf, '=');
|
jbe@402
|
234 luaL_addchar(&buf, '\'');
|
jbe@402
|
235 do {
|
jbe@402
|
236 char c;
|
jbe@402
|
237 c = value[value_pos++];
|
jbe@402
|
238 if (c == '\'') luaL_addchar(&buf, '\\');
|
jbe@402
|
239 luaL_addchar(&buf, c);
|
jbe@402
|
240 } while (value_pos < value_len);
|
jbe@402
|
241 luaL_addchar(&buf, '\'');
|
jbe@402
|
242 need_seperator = 1;
|
jbe/bsw@0
|
243 }
|
jbe@402
|
244 luaL_pushresult(&buf);
|
jbe/bsw@0
|
245 }
|
jbe@402
|
246 // ensure that string is on stack position 1 which is the top of stack:
|
jbe@402
|
247 lua_replace(L, 1);
|
jbe/bsw@0
|
248 }
|
jbe@402
|
249 // use conninfo string on stack position 1:
|
jbe@402
|
250 conninfo = lua_tostring(L, 1);
|
jbe@406
|
251 // create userdata on stack position 2:
|
jbe@406
|
252 lua_settop(L, 1);
|
jbe@406
|
253 conn = lua_newuserdata(L, sizeof(*conn)); // 2
|
jbe@23
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254 // call PQconnectdb function of libpq:
|
jbe@406
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255 conn->pgconn = PQconnectdb(conninfo);
|
jbe@406
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256 // try emergency garbage collection on first failure:
|
jbe@406
|
257 if (!conn->pgconn) {
|
jbe@406
|
258 lua_gc(L, LUA_GCCOLLECT, 0);
|
jbe@406
|
259 conn->pgconn = PQconnectdb(conninfo);
|
jbe@407
|
260 // throw error in case of (unexpected) error of PQconnectdb call:
|
jbe@407
|
261 if (!conn->pgconn) return luaL_error(L,
|
jbe@407
|
262 "Error in libpq while creating 'PGconn' structure."
|
jbe@407
|
263 );
|
jbe/bsw@0
|
264 }
|
jbe@406
|
265 // set metatable for userdata (ensure PQfinish on unexpected error below):
|
jbe@406
|
266 luaL_setmetatable(L, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@406
|
267 // check result of PQconnectdb call:
|
jbe@406
|
268 if (PQstatus(conn->pgconn) != CONNECTION_OK) {
|
jbe@406
|
269 lua_pushnil(L); // 3
|
jbe@406
|
270 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 4
|
jbe@406
|
271 lua_newtable(L); // 5
|
jbe@406
|
272 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
|
jbe/bsw@0
|
273 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe@406
|
274 lua_setfield(L, 5, "code");
|
jbe@406
|
275 lua_pushvalue(L, 4);
|
jbe@406
|
276 lua_setfield(L, 5, "message");
|
jbe@406
|
277 // manual PQfinish (do not wait until garbage collection):
|
jbe@406
|
278 PQfinish(conn->pgconn);
|
jbe@406
|
279 conn->pgconn = NULL;
|
jbe/bsw@0
|
280 return 3;
|
jbe/bsw@0
|
281 }
|
jbe@23
|
282 // set 'server_encoding' in C-struct of userdata:
|
jbe/bsw@0
|
283 {
|
jbe/bsw@0
|
284 const char *charset;
|
jbe@406
|
285 charset = PQparameterStatus(conn->pgconn, "server_encoding");
|
jbe/bsw@0
|
286 if (charset && !strcmp(charset, "UTF8")) {
|
jbe/bsw@0
|
287 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_UTF8;
|
jbe/bsw@0
|
288 } else {
|
jbe/bsw@0
|
289 conn->server_encoding = MONDELEFANT_SERVER_ENCODING_ASCII;
|
jbe/bsw@0
|
290 }
|
jbe/bsw@0
|
291 }
|
jbe@396
|
292 // create and associate userdata table:
|
jbe@396
|
293 lua_newtable(L);
|
jbe@406
|
294 lua_setuservalue(L, 2);
|
jbe@396
|
295 // store key "fd" with file descriptor of connection:
|
jbe@406
|
296 lua_pushinteger(L, PQsocket(conn->pgconn));
|
jbe@406
|
297 lua_setfield(L, 2, "fd");
|
jbe@23
|
298 // store key "engine" with value "postgresql" as connection specific data:
|
jbe/bsw@0
|
299 lua_pushliteral(L, "postgresql");
|
jbe@406
|
300 lua_setfield(L, 2, "engine");
|
jbe@23
|
301 // return userdata:
|
jbe/bsw@0
|
302 return 1;
|
jbe/bsw@0
|
303 }
|
jbe/bsw@0
|
304
|
jbe@23
|
305 // returns pointer to libpq handle 'pgconn' of userdata at given index
|
jbe@23
|
306 // (or throws error, if database connection has been closed):
|
jbe/bsw@0
|
307 static mondelefant_conn_t *mondelefant_get_conn(lua_State *L, int index) {
|
jbe/bsw@0
|
308 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
309 conn = luaL_checkudata(L, index, MONDELEFANT_CONN_MT_REGKEY);
|
jbe/bsw@0
|
310 if (!conn->pgconn) {
|
jbe/bsw@0
|
311 luaL_error(L, "PostgreSQL connection has been closed.");
|
jbe/bsw@0
|
312 return NULL;
|
jbe/bsw@0
|
313 }
|
jbe/bsw@0
|
314 return conn;
|
jbe/bsw@0
|
315 }
|
jbe/bsw@0
|
316
|
jbe@23
|
317 // meta-method "__index" of database handles (userdata):
|
jbe/bsw@0
|
318 static int mondelefant_conn_index(lua_State *L) {
|
jbe@23
|
319 // try table for connection specific data:
|
jbe/bsw@0
|
320 lua_settop(L, 2);
|
jbe@396
|
321 lua_getuservalue(L, 1); // 3
|
jbe/bsw@0
|
322 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
323 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
324 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
325 // try to use prototype stored in connection specific data:
|
jbe/bsw@0
|
326 lua_settop(L, 3);
|
jbe/bsw@0
|
327 lua_getfield(L, 3, "prototype"); // 4
|
jbe/bsw@0
|
328 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
329 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
330 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
331 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
332 }
|
jbe@23
|
333 // try to use "postgresql_connection_prototype" of library:
|
jbe/bsw@0
|
334 lua_settop(L, 2);
|
jbe/bsw@0
|
335 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY); // 3
|
jbe/bsw@0
|
336 lua_getfield(L, 3, "postgresql_connection_prototype"); // 4
|
jbe/bsw@0
|
337 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
338 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
339 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
340 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
341 }
|
jbe@23
|
342 // try to use "connection_prototype" of library:
|
jbe/bsw@0
|
343 lua_settop(L, 3);
|
jbe/bsw@0
|
344 lua_getfield(L, 3, "connection_prototype"); // 4
|
jbe/bsw@0
|
345 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
346 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
347 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
348 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
349 }
|
jbe@23
|
350 // give up and return nothing:
|
jbe/bsw@0
|
351 return 0;
|
jbe/bsw@0
|
352 }
|
jbe/bsw@0
|
353
|
jbe@23
|
354 // meta-method "__newindex" of database handles (userdata):
|
jbe/bsw@0
|
355 static int mondelefant_conn_newindex(lua_State *L) {
|
jbe@23
|
356 // store key-value pair in table for connection specific data:
|
jbe/bsw@0
|
357 lua_settop(L, 3);
|
jbe@396
|
358 lua_getuservalue(L, 1); // 4
|
jbe/bsw@0
|
359 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
360 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
361 lua_settable(L, 4);
|
jbe@23
|
362 // return nothing:
|
jbe/bsw@0
|
363 return 0;
|
jbe/bsw@0
|
364 }
|
jbe/bsw@0
|
365
|
jbe@23
|
366 // meta-method "__gc" of database handles:
|
jbe/bsw@0
|
367 static int mondelefant_conn_free(lua_State *L) {
|
jbe/bsw@0
|
368 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
369 conn = luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@410
|
370 if (conn->todo_PQfreemem) {
|
jbe@410
|
371 PQfreemem(conn->todo_PQfreemem);
|
jbe@410
|
372 conn->todo_PQfreemem = NULL;
|
jbe@410
|
373 }
|
jbe@410
|
374 if (conn->todo_PQclear) {
|
jbe@410
|
375 PQclear(conn->todo_PQclear);
|
jbe@410
|
376 conn->todo_PQclear = NULL;
|
jbe@410
|
377 }
|
jbe@410
|
378 if (conn->pgconn) {
|
jbe@410
|
379 PQfinish(conn->pgconn);
|
jbe@410
|
380 conn->pgconn = NULL;
|
jbe@410
|
381 }
|
jbe/bsw@0
|
382 return 0;
|
jbe/bsw@0
|
383 }
|
jbe/bsw@0
|
384
|
jbe@23
|
385 // method "close" of database handles:
|
jbe/bsw@0
|
386 static int mondelefant_conn_close(lua_State *L) {
|
jbe/bsw@0
|
387 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
388 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
389 PQfinish(conn->pgconn);
|
jbe/bsw@0
|
390 conn->pgconn = NULL;
|
jbe@397
|
391 lua_pushnil(L);
|
jbe@396
|
392 lua_setfield(L, 1, "fd"); // set "fd" attribute to nil
|
jbe/bsw@0
|
393 return 0;
|
jbe/bsw@0
|
394 }
|
jbe/bsw@0
|
395
|
jbe@23
|
396 // method "is_okay" of database handles:
|
jbe/bsw@0
|
397 static int mondelefant_conn_is_ok(lua_State *L) {
|
jbe/bsw@0
|
398 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
399 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
400 lua_pushboolean(L, PQstatus(conn->pgconn) == CONNECTION_OK);
|
jbe/bsw@0
|
401 return 1;
|
jbe/bsw@0
|
402 }
|
jbe/bsw@0
|
403
|
jbe@23
|
404 // method "get_transaction_status" of database handles:
|
jbe/bsw@0
|
405 static int mondelefant_conn_get_transaction_status(lua_State *L) {
|
jbe/bsw@0
|
406 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
407 conn = mondelefant_get_conn(L, 1);
|
jbe/bsw@0
|
408 switch (PQtransactionStatus(conn->pgconn)) {
|
jbe/bsw@0
|
409 case PQTRANS_IDLE:
|
jbe/bsw@0
|
410 lua_pushliteral(L, "idle");
|
jbe/bsw@0
|
411 break;
|
jbe/bsw@0
|
412 case PQTRANS_ACTIVE:
|
jbe/bsw@0
|
413 lua_pushliteral(L, "active");
|
jbe/bsw@0
|
414 break;
|
jbe/bsw@0
|
415 case PQTRANS_INTRANS:
|
jbe/bsw@0
|
416 lua_pushliteral(L, "intrans");
|
jbe/bsw@0
|
417 break;
|
jbe/bsw@0
|
418 case PQTRANS_INERROR:
|
jbe/bsw@0
|
419 lua_pushliteral(L, "inerror");
|
jbe/bsw@0
|
420 break;
|
jbe/bsw@0
|
421 default:
|
jbe/bsw@0
|
422 lua_pushliteral(L, "unknown");
|
jbe/bsw@0
|
423 }
|
jbe/bsw@0
|
424 return 1;
|
jbe/bsw@0
|
425 }
|
jbe/bsw@0
|
426
|
jbe@397
|
427 // method "try_wait" of database handles:
|
jbe@397
|
428 static int mondelefant_conn_try_wait(lua_State *L) {
|
jbe@393
|
429 mondelefant_conn_t *conn;
|
jbe@393
|
430 int infinite, nonblock = 0;
|
jbe@393
|
431 struct timespec wakeup;
|
jbe@393
|
432 int fd;
|
jbe@393
|
433 fd_set fds;
|
jbe@393
|
434 conn = mondelefant_get_conn(L, 1);
|
jbe@393
|
435 infinite = lua_isnoneornil(L, 2);
|
jbe@393
|
436 if (!infinite) {
|
jbe@393
|
437 lua_Number n;
|
jbe@393
|
438 int isnum;
|
jbe@393
|
439 n = lua_tonumberx(L, 2, &isnum);
|
jbe@393
|
440 if (isnum && n>0 && n<=86400*366) {
|
jbe@393
|
441 if (clock_gettime(CLOCK_MONOTONIC, &wakeup)) {
|
jbe@393
|
442 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
|
jbe@393
|
443 }
|
jbe@393
|
444 wakeup.tv_sec += n;
|
jbe@393
|
445 wakeup.tv_nsec += 1000000000 * (n - (time_t)n);
|
jbe@393
|
446 if (wakeup.tv_nsec >= 1000000000) {
|
jbe@393
|
447 wakeup.tv_sec += 1;
|
jbe@393
|
448 wakeup.tv_nsec -= 1000000000;
|
jbe@393
|
449 }
|
jbe@393
|
450 } else if (isnum && n==0) {
|
jbe@393
|
451 nonblock = 1;
|
jbe@393
|
452 } else {
|
jbe@393
|
453 luaL_argcheck(L, 0, 2, "not a valid timeout");
|
jbe@393
|
454 }
|
jbe@393
|
455 }
|
jbe@397
|
456 lua_settop(L, 1);
|
jbe@393
|
457 if (!nonblock) {
|
jbe@393
|
458 fd = PQsocket(conn->pgconn);
|
jbe@393
|
459 FD_ZERO(&fds);
|
jbe@393
|
460 FD_SET(fd, &fds);
|
jbe@393
|
461 }
|
jbe@393
|
462 while (true) {
|
jbe@393
|
463 {
|
jbe@393
|
464 PGnotify *notify;
|
jbe@393
|
465 if (!PQconsumeInput(conn->pgconn)) {
|
jbe@397
|
466 lua_newtable(L); // 2
|
jbe@406
|
467 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
|
jbe@397
|
468 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe@397
|
469 lua_setfield(L, 2, "code");
|
jbe@397
|
470 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn)); // 3
|
jbe@397
|
471 lua_setfield(L, 2, "message");
|
jbe@397
|
472 return 1;
|
jbe@393
|
473 }
|
jbe@393
|
474 notify = PQnotifies(conn->pgconn);
|
jbe@393
|
475 if (notify) {
|
jbe@397
|
476 lua_pushnil(L);
|
jbe@393
|
477 lua_pushstring(L, notify->relname);
|
jbe@393
|
478 lua_pushstring(L, notify->extra);
|
jbe@393
|
479 lua_pushinteger(L, notify->be_pid);
|
jbe@393
|
480 PQfreemem(notify);
|
jbe@397
|
481 return 4;
|
jbe@393
|
482 }
|
jbe@393
|
483 }
|
jbe@393
|
484 if (infinite) {
|
jbe@393
|
485 select(fd+1, &fds, NULL, NULL, NULL);
|
jbe@393
|
486 } else if (nonblock) {
|
jbe@393
|
487 break;
|
jbe@393
|
488 } else {
|
jbe@393
|
489 struct timespec tp;
|
jbe@393
|
490 struct timeval timeout = { 0, };
|
jbe@393
|
491 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
|
jbe@393
|
492 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
|
jbe@393
|
493 }
|
jbe@393
|
494 tp.tv_sec = wakeup.tv_sec - tp.tv_sec;
|
jbe@393
|
495 tp.tv_nsec = wakeup.tv_nsec - tp.tv_nsec;
|
jbe@393
|
496 if (tp.tv_nsec < 0) {
|
jbe@393
|
497 tp.tv_sec -= 1;
|
jbe@393
|
498 tp.tv_nsec += 1000000000;
|
jbe@393
|
499 }
|
jbe@393
|
500 timeout.tv_sec = tp.tv_sec;
|
jbe@393
|
501 timeout.tv_usec = (tp.tv_nsec + 500) / 1000;
|
jbe@393
|
502 if (
|
jbe@393
|
503 timeout.tv_sec < 0 ||
|
jbe@393
|
504 (timeout.tv_sec == 0 && timeout.tv_usec == 0)
|
jbe@393
|
505 ) break;
|
jbe@393
|
506 select(fd+1, &fds, NULL, NULL, &timeout);
|
jbe@393
|
507 }
|
jbe@393
|
508 }
|
jbe@397
|
509 lua_pushnil(L);
|
jbe@397
|
510 lua_pushnil(L);
|
jbe@393
|
511 return 2;
|
jbe@393
|
512 }
|
jbe@393
|
513
|
jbe@23
|
514 // method "create_list" of database handles:
|
jbe/bsw@0
|
515 static int mondelefant_conn_create_list(lua_State *L) {
|
jbe@23
|
516 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
517 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
518 // if no second argument is given, use an empty table:
|
jbe@397
|
519 if (lua_isnoneornil(L, 2)) {
|
jbe@397
|
520 lua_settop(L, 1);
|
jbe@397
|
521 lua_newtable(L); // 2
|
jbe@397
|
522 } else {
|
jbe@397
|
523 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
524 lua_settop(L, 2);
|
jbe/bsw@0
|
525 }
|
jbe@23
|
526 // set meta-table for database result lists/objects:
|
jbe@406
|
527 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
|
jbe@23
|
528 // set "_connection" attribute to self:
|
jbe/bsw@0
|
529 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
530 lua_setfield(L, 2, "_connection");
|
jbe@23
|
531 // set "_type" attribute to string "list":
|
jbe/bsw@0
|
532 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
533 lua_setfield(L, 2, "_type");
|
jbe@23
|
534 // return created database result list:
|
jbe/bsw@0
|
535 return 1;
|
jbe/bsw@0
|
536 }
|
jbe/bsw@0
|
537
|
jbe@23
|
538 // method "create_object" of database handles:
|
jbe/bsw@0
|
539 static int mondelefant_conn_create_object(lua_State *L) {
|
jbe@23
|
540 // ensure that first argument is a database connection:
|
jbe/bsw@0
|
541 luaL_checkudata(L, 1, MONDELEFANT_CONN_MT_REGKEY);
|
jbe@23
|
542 // if no second argument is given, use an empty table:
|
jbe@397
|
543 if (lua_isnoneornil(L, 2)) {
|
jbe@397
|
544 lua_settop(L, 1);
|
jbe@397
|
545 lua_newtable(L); // 2
|
jbe@397
|
546 } else {
|
jbe@397
|
547 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
548 lua_settop(L, 2);
|
jbe/bsw@0
|
549 }
|
jbe@397
|
550 // set meta-table for database result lists/objects:
|
jbe@406
|
551 luaL_setmetatable(L, MONDELEFANT_RESULT_MT_REGKEY);
|
jbe@23
|
552 // set "_connection" attribute to self:
|
jbe/bsw@0
|
553 lua_pushvalue(L, 1); // 3
|
jbe/bsw@0
|
554 lua_setfield(L, 2, "_connection");
|
jbe@23
|
555 // set "_type" attribute to string "object":
|
jbe/bsw@0
|
556 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
557 lua_setfield(L, 2, "_type"); // "object" or "list"
|
jbe@23
|
558 // create empty tables for "_data", "_dirty" and "_ref" attributes:
|
jbe/bsw@0
|
559 lua_newtable(L); // 3
|
jbe/bsw@0
|
560 lua_setfield(L, 2, "_data");
|
jbe/bsw@0
|
561 lua_newtable(L); // 3
|
jbe/bsw@0
|
562 lua_setfield(L, 2, "_dirty");
|
jbe/bsw@0
|
563 lua_newtable(L); // 3
|
jbe/bsw@0
|
564 lua_setfield(L, 2, "_ref"); // nil=no info, false=nil, else table
|
jbe@23
|
565 // return created database result object:
|
jbe/bsw@0
|
566 return 1;
|
jbe/bsw@0
|
567 }
|
jbe/bsw@0
|
568
|
jbe@23
|
569 // method "quote_string" of database handles:
|
jbe/bsw@0
|
570 static int mondelefant_conn_quote_string(lua_State *L) {
|
jbe/bsw@0
|
571 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
572 const char *input;
|
jbe/bsw@0
|
573 size_t input_len;
|
jbe@407
|
574 luaL_Buffer buf;
|
jbe/bsw@0
|
575 char *output;
|
jbe/bsw@0
|
576 size_t output_len;
|
jbe@407
|
577 // get database connection object:
|
jbe/bsw@0
|
578 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
579 // get second argument, which must be a string:
|
jbe/bsw@0
|
580 input = luaL_checklstring(L, 2, &input_len);
|
jbe@23
|
581 // throw error, if string is too long:
|
jbe/bsw@0
|
582 if (input_len > (SIZE_MAX / sizeof(char) - 3) / 2) {
|
jbe/bsw@0
|
583 return luaL_error(L, "String to be escaped is too long.");
|
jbe/bsw@0
|
584 }
|
jbe@23
|
585 // allocate memory for quoted string:
|
jbe@407
|
586 output = luaL_buffinitsize(L, &buf, (2 * input_len + 3) * sizeof(char));
|
jbe@23
|
587 // do escaping by calling PQescapeStringConn and enclosing result with
|
jbe@23
|
588 // single quotes:
|
jbe/bsw@0
|
589 output[0] = '\'';
|
jbe/bsw@0
|
590 output_len = PQescapeStringConn(
|
jbe/bsw@0
|
591 conn->pgconn, output + 1, input, input_len, NULL
|
jbe/bsw@0
|
592 );
|
jbe/bsw@0
|
593 output[output_len + 1] = '\'';
|
jbe/bsw@0
|
594 output[output_len + 2] = 0;
|
jbe@23
|
595 // create Lua string:
|
jbe@407
|
596 luaL_addsize(&buf, output_len + 2);
|
jbe@23
|
597 // return Lua string:
|
jbe/bsw@0
|
598 return 1;
|
jbe/bsw@0
|
599 }
|
jbe/bsw@0
|
600
|
jbe@23
|
601 // method "quote_binary" of database handles:
|
jbe/bsw@0
|
602 static int mondelefant_conn_quote_binary(lua_State *L) {
|
jbe/bsw@0
|
603 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
604 const char *input;
|
jbe/bsw@0
|
605 size_t input_len;
|
jbe/bsw@0
|
606 char *output;
|
jbe/bsw@0
|
607 size_t output_len;
|
jbe/bsw@0
|
608 luaL_Buffer buf;
|
jbe@407
|
609 // get database connection object:
|
jbe/bsw@0
|
610 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
611 // get second argument, which must be a string:
|
jbe/bsw@0
|
612 input = luaL_checklstring(L, 2, &input_len);
|
jbe@408
|
613 // avoid cumulating memory leaks in case of previous out-of-memory errors:
|
jbe@410
|
614 if (conn->todo_PQfreemem) {
|
jbe@410
|
615 PQfreemem(conn->todo_PQfreemem);
|
jbe@410
|
616 conn->todo_PQfreemem = NULL;
|
jbe@410
|
617 }
|
jbe@23
|
618 // call PQescapeByteaConn, which allocates memory itself:
|
jbe/bsw@0
|
619 output = (char *)PQescapeByteaConn(
|
jbe/bsw@0
|
620 conn->pgconn, (const unsigned char *)input, input_len, &output_len
|
jbe/bsw@0
|
621 );
|
jbe/bsw@0
|
622 if (!output) {
|
jbe@408
|
623 lua_gc(L, LUA_GCCOLLECT, 0);
|
jbe@408
|
624 output = (char *)PQescapeByteaConn(
|
jbe@408
|
625 conn->pgconn, (const unsigned char *)input, input_len, &output_len
|
jbe@408
|
626 );
|
jbe@408
|
627 if (!output) {
|
jbe@408
|
628 return luaL_error(L, "Could not allocate memory for binary quoting.");
|
jbe@408
|
629 }
|
jbe/bsw@0
|
630 }
|
jbe@410
|
631 // ensure call of PQfreemem in case of repeated out-of-memory errors:
|
jbe@408
|
632 conn->todo_PQfreemem = output;
|
jbe@23
|
633 // create Lua string enclosed by single quotes:
|
jbe/bsw@0
|
634 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
635 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
636 luaL_addlstring(&buf, output, output_len - 1);
|
jbe/bsw@0
|
637 luaL_addchar(&buf, '\'');
|
jbe/bsw@0
|
638 luaL_pushresult(&buf);
|
jbe@23
|
639 // free memory allocated by PQescapeByteaConn:
|
jbe/bsw@0
|
640 PQfreemem(output);
|
jbe@408
|
641 // avoid double call of PQfreemem later:
|
jbe@408
|
642 conn->todo_PQfreemem = NULL;
|
jbe@23
|
643 // return Lua string:
|
jbe/bsw@0
|
644 return 1;
|
jbe/bsw@0
|
645 }
|
jbe/bsw@0
|
646
|
jbe@23
|
647 // method "assemble_command" of database handles:
|
jbe/bsw@0
|
648 static int mondelefant_conn_assemble_command(lua_State *L) {
|
jbe/bsw@0
|
649 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
650 int paramidx = 2;
|
jbe/bsw@0
|
651 const char *template;
|
jbe/bsw@0
|
652 size_t template_pos = 0;
|
jbe/bsw@0
|
653 luaL_Buffer buf;
|
jbe@407
|
654 // get database connection object:
|
jbe/bsw@0
|
655 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
656 // if second argument is a string, return this string:
|
jbe@397
|
657 if (lua_type(L, 2) == LUA_TSTRING) {
|
jbe@397
|
658 lua_settop(L, 2);
|
jbe/bsw@0
|
659 return 1;
|
jbe/bsw@0
|
660 }
|
jbe@23
|
661 // if second argument has __tostring meta-method,
|
jbe@23
|
662 // then use this method and return its result:
|
jbe/bsw@0
|
663 if (luaL_callmeta(L, 2, "__tostring")) return 1;
|
jbe@23
|
664 // otherwise, require that second argument is a table:
|
jbe/bsw@0
|
665 luaL_checktype(L, 2, LUA_TTABLE);
|
jbe@397
|
666 // set stack top:
|
jbe@397
|
667 lua_settop(L, 2);
|
jbe@23
|
668 // get first element of table, which must be a string:
|
jbe/bsw@0
|
669 lua_rawgeti(L, 2, 1); // 3
|
jbe/bsw@0
|
670 luaL_argcheck(L,
|
jbe/bsw@0
|
671 lua_isstring(L, 3),
|
jbe/bsw@0
|
672 2,
|
jbe/bsw@0
|
673 "First entry of SQL command structure is not a string."
|
jbe/bsw@0
|
674 );
|
jbe/bsw@0
|
675 template = lua_tostring(L, 3);
|
jbe@23
|
676 // get value of "input_converter" attribute of database connection:
|
jbe/bsw@0
|
677 lua_pushliteral(L, "input_converter"); // 4
|
jbe/bsw@0
|
678 lua_gettable(L, 1); // input_converter at stack position 4
|
jbe@23
|
679 // reserve space on Lua stack:
|
jbe/bsw@0
|
680 lua_pushnil(L); // free space at stack position 5
|
jbe/bsw@0
|
681 lua_pushnil(L); // free space at stack position 6
|
jbe@23
|
682 // initialize Lua buffer for result string:
|
jbe/bsw@0
|
683 luaL_buffinit(L, &buf);
|
jbe@23
|
684 // fill buffer in loop:
|
jbe/bsw@0
|
685 while (1) {
|
jbe@23
|
686 // variable declaration:
|
jbe/bsw@0
|
687 char c;
|
jbe@23
|
688 // get next character:
|
jbe/bsw@0
|
689 c = template[template_pos++];
|
jbe@23
|
690 // break, when character is NULL byte:
|
jbe/bsw@0
|
691 if (!c) break;
|
jbe@23
|
692 // question-mark and dollar-sign are special characters:
|
jbe@23
|
693 if (c == '?' || c == '$') { // special character found
|
jbe@23
|
694 // check, if same character follows:
|
jbe@23
|
695 if (template[template_pos] == c) { // special character is escaped
|
jbe@23
|
696 // consume two characters of input and add one character to buffer:
|
jbe/bsw@0
|
697 template_pos++;
|
jbe/bsw@0
|
698 luaL_addchar(&buf, c);
|
jbe@23
|
699 } else { // special character is not escaped
|
jbe/bsw@0
|
700 luaL_Buffer keybuf;
|
jbe/bsw@0
|
701 int subcmd;
|
jbe@23
|
702 // set 'subcmd' = true, if special character was a dollar-sign,
|
jbe@23
|
703 // set 'subcmd' = false, if special character was a question-mark:
|
jbe/bsw@0
|
704 subcmd = (c == '$');
|
jbe@23
|
705 // read any number of alpha numeric chars or underscores
|
jbe@23
|
706 // and store them on Lua stack:
|
jbe/bsw@0
|
707 luaL_buffinit(L, &keybuf);
|
jbe/bsw@0
|
708 while (1) {
|
jbe/bsw@0
|
709 c = template[template_pos];
|
jbe/bsw@0
|
710 if (
|
jbe/bsw@0
|
711 (c < 'A' || c > 'Z') &&
|
jbe/bsw@0
|
712 (c < 'a' || c > 'z') &&
|
jbe/bsw@0
|
713 (c < '0' || c > '9') &&
|
jbe/bsw@0
|
714 (c != '_')
|
jbe/bsw@0
|
715 ) break;
|
jbe/bsw@0
|
716 luaL_addchar(&keybuf, c);
|
jbe/bsw@0
|
717 template_pos++;
|
jbe/bsw@0
|
718 }
|
jbe/bsw@0
|
719 luaL_pushresult(&keybuf);
|
jbe@23
|
720 // check, if any characters matched:
|
jbe@64
|
721 if (lua_rawlen(L, -1)) {
|
jbe@23
|
722 // if any alpha numeric chars or underscores were found,
|
jbe@23
|
723 // push them on stack as a Lua string and use them to lookup
|
jbe@23
|
724 // value from second argument:
|
jbe/bsw@0
|
725 lua_pushvalue(L, -1); // save key on stack
|
jbe@23
|
726 lua_gettable(L, 2); // fetch value (raw-value)
|
jbe/bsw@0
|
727 } else {
|
jbe@23
|
728 // otherwise push nil and use numeric lookup based on 'paramidx':
|
jbe/bsw@0
|
729 lua_pop(L, 1);
|
jbe/bsw@0
|
730 lua_pushnil(L); // put nil on key position
|
jbe@23
|
731 lua_rawgeti(L, 2, paramidx++); // fetch value (raw-value)
|
jbe/bsw@0
|
732 }
|
jbe@23
|
733 // Lua stack contains: ..., <buffer>, key, raw-value
|
jbe@23
|
734 // branch according to type of special character ("?" or "$"):
|
jbe@23
|
735 if (subcmd) { // dollar-sign
|
jbe/bsw@0
|
736 size_t i;
|
jbe/bsw@0
|
737 size_t count;
|
jbe@23
|
738 // store fetched value (which is supposed to be sub-structure)
|
jbe@23
|
739 // on Lua stack position 5 and drop key:
|
jbe@23
|
740 lua_replace(L, 5);
|
jbe@23
|
741 lua_pop(L, 1);
|
jbe@23
|
742 // Lua stack contains: ..., <buffer>
|
jbe@23
|
743 // check, if fetched value is really a sub-structure:
|
jbe/bsw@0
|
744 luaL_argcheck(L,
|
jbe/bsw@0
|
745 !lua_isnil(L, 5),
|
jbe/bsw@0
|
746 2,
|
jbe/bsw@0
|
747 "SQL sub-structure not found."
|
jbe/bsw@0
|
748 );
|
jbe/bsw@0
|
749 luaL_argcheck(L,
|
jbe/bsw@0
|
750 lua_type(L, 5) == LUA_TTABLE,
|
jbe/bsw@0
|
751 2,
|
jbe/bsw@0
|
752 "SQL sub-structure must be a table."
|
jbe/bsw@0
|
753 );
|
jbe@23
|
754 // Lua stack contains: ..., <buffer>
|
jbe@23
|
755 // get value of "sep" attribute of sub-structure,
|
jbe@23
|
756 // and place it on Lua stack position 6:
|
jbe/bsw@0
|
757 lua_getfield(L, 5, "sep");
|
jbe@23
|
758 lua_replace(L, 6);
|
jbe@23
|
759 // if seperator is nil, then use ", " as default,
|
jbe@23
|
760 // if seperator is neither nil nor a string, then throw error:
|
jbe/bsw@0
|
761 if (lua_isnil(L, 6)) {
|
jbe/bsw@0
|
762 lua_pushstring(L, ", ");
|
jbe/bsw@0
|
763 lua_replace(L, 6);
|
jbe/bsw@0
|
764 } else {
|
jbe/bsw@0
|
765 luaL_argcheck(L,
|
jbe/bsw@0
|
766 lua_isstring(L, 6),
|
jbe/bsw@0
|
767 2,
|
jbe/bsw@0
|
768 "Seperator of SQL sub-structure has to be a string."
|
jbe/bsw@0
|
769 );
|
jbe/bsw@0
|
770 }
|
jbe@23
|
771 // iterate over items of sub-structure:
|
jbe@64
|
772 count = lua_rawlen(L, 5);
|
jbe/bsw@0
|
773 for (i = 0; i < count; i++) {
|
jbe@23
|
774 // add seperator, unless this is the first run:
|
jbe/bsw@0
|
775 if (i) {
|
jbe/bsw@0
|
776 lua_pushvalue(L, 6);
|
jbe/bsw@0
|
777 luaL_addvalue(&buf);
|
jbe/bsw@0
|
778 }
|
jbe@23
|
779 // recursivly apply assemble function and add results to buffer:
|
jbe/bsw@0
|
780 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
781 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
782 lua_rawgeti(L, 5, i+1);
|
jbe/bsw@0
|
783 lua_call(L, 2, 1);
|
jbe/bsw@0
|
784 luaL_addvalue(&buf);
|
jbe/bsw@0
|
785 }
|
jbe@23
|
786 } else { // question-mark
|
jbe/bsw@0
|
787 if (lua_toboolean(L, 4)) {
|
jbe@23
|
788 // call input_converter with connection handle, raw-value and
|
jbe@23
|
789 // an info-table which contains a "field_name" entry with the
|
jbe@23
|
790 // used key:
|
jbe/bsw@0
|
791 lua_pushvalue(L, 4);
|
jbe/bsw@0
|
792 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
793 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
794 lua_newtable(L);
|
jbe/bsw@0
|
795 lua_pushvalue(L, -6);
|
jbe/bsw@0
|
796 lua_setfield(L, -2, "field_name");
|
jbe/bsw@0
|
797 lua_call(L, 3, 1);
|
jbe@23
|
798 // Lua stack contains: ..., <buffer>, key, raw-value, final-value
|
jbe@23
|
799 // remove key and raw-value:
|
jbe/bsw@0
|
800 lua_remove(L, -2);
|
jbe/bsw@0
|
801 lua_remove(L, -2);
|
jbe@23
|
802 // Lua stack contains: ..., <buffer>, final-value
|
jbe@23
|
803 // throw error, if final-value is not a string:
|
jbe/bsw@0
|
804 if (!lua_isstring(L, -1)) {
|
jbe/bsw@0
|
805 return luaL_error(L, "input_converter returned non-string.");
|
jbe/bsw@0
|
806 }
|
jbe/bsw@0
|
807 } else {
|
jbe@23
|
808 // remove key from stack:
|
jbe/bsw@0
|
809 lua_remove(L, -2);
|
jbe@23
|
810 // Lua stack contains: ..., <buffer>, raw-value
|
jbe@23
|
811 // branch according to type of value:
|
jbe@408
|
812 // NOTE: Lua automatically converts numbers to strings
|
jbe@23
|
813 if (lua_isnil(L, -1)) { // value is nil
|
jbe@23
|
814 // push string "NULL" to stack:
|
jbe/bsw@0
|
815 lua_pushliteral(L, "NULL");
|
jbe@23
|
816 } else if (lua_type(L, -1) == LUA_TBOOLEAN) { // value is boolean
|
jbe@23
|
817 // push strings "TRUE" or "FALSE" to stack:
|
jbe/bsw@0
|
818 lua_pushstring(L, lua_toboolean(L, -1) ? "TRUE" : "FALSE");
|
jbe@23
|
819 } else if (lua_isstring(L, -1)) { // value is string or number
|
jbe@408
|
820 // push output of "quote_string" method of database connection
|
jbe@408
|
821 // to stack:
|
jbe/bsw@0
|
822 lua_tostring(L, -1);
|
jbe/bsw@0
|
823 lua_pushcfunction(L, mondelefant_conn_quote_string);
|
jbe/bsw@0
|
824 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
825 lua_pushvalue(L, -3);
|
jbe/bsw@0
|
826 lua_call(L, 2, 1);
|
jbe@23
|
827 } else { // value is of other type
|
jbe@23
|
828 // throw error:
|
jbe/bsw@0
|
829 return luaL_error(L,
|
jbe/bsw@0
|
830 "Unable to convert SQL value due to unknown type "
|
jbe/bsw@0
|
831 "or missing input_converter."
|
jbe/bsw@0
|
832 );
|
jbe/bsw@0
|
833 }
|
jbe@23
|
834 // Lua stack contains: ..., <buffer>, raw-value, final-value
|
jbe@23
|
835 // remove raw-value:
|
jbe/bsw@0
|
836 lua_remove(L, -2);
|
jbe@23
|
837 // Lua stack contains: ..., <buffer>, final-value
|
jbe/bsw@0
|
838 }
|
jbe@23
|
839 // append final-value to buffer:
|
jbe/bsw@0
|
840 luaL_addvalue(&buf);
|
jbe/bsw@0
|
841 }
|
jbe/bsw@0
|
842 }
|
jbe@23
|
843 } else { // character is not special
|
jbe@23
|
844 // just copy character:
|
jbe/bsw@0
|
845 luaL_addchar(&buf, c);
|
jbe/bsw@0
|
846 }
|
jbe/bsw@0
|
847 }
|
jbe@23
|
848 // return string in buffer:
|
jbe/bsw@0
|
849 luaL_pushresult(&buf);
|
jbe/bsw@0
|
850 return 1;
|
jbe/bsw@0
|
851 }
|
jbe/bsw@0
|
852
|
jbe@23
|
853 // max number of SQL statements executed by one "query" method call:
|
jbe/bsw@0
|
854 #define MONDELEFANT_MAX_COMMAND_COUNT 64
|
jbe@23
|
855 // max number of columns in a database result:
|
jbe/bsw@0
|
856 #define MONDELEFANT_MAX_COLUMN_COUNT 1024
|
jbe@23
|
857 // enum values for 'modes' array in C-function below:
|
jbe/bsw@0
|
858 #define MONDELEFANT_QUERY_MODE_LIST 1
|
jbe/bsw@0
|
859 #define MONDELEFANT_QUERY_MODE_OBJECT 2
|
jbe/bsw@0
|
860 #define MONDELEFANT_QUERY_MODE_OPT_OBJECT 3
|
jbe/bsw@0
|
861
|
jbe@23
|
862 // method "try_query" of database handles:
|
jbe/bsw@0
|
863 static int mondelefant_conn_try_query(lua_State *L) {
|
jbe/bsw@0
|
864 mondelefant_conn_t *conn;
|
jbe/bsw@0
|
865 int command_count;
|
jbe/bsw@0
|
866 int command_idx;
|
jbe/bsw@0
|
867 int modes[MONDELEFANT_MAX_COMMAND_COUNT];
|
jbe/bsw@0
|
868 luaL_Buffer buf;
|
jbe/bsw@0
|
869 int sent_success;
|
jbe/bsw@0
|
870 PGresult *res;
|
jbe/bsw@0
|
871 int rows, cols, row, col;
|
jbe@407
|
872 // get database connection object:
|
jbe/bsw@0
|
873 conn = mondelefant_get_conn(L, 1);
|
jbe@23
|
874 // calculate number of commands (2 arguments for one command):
|
jbe/bsw@0
|
875 command_count = lua_gettop(L) / 2;
|
jbe@23
|
876 // push nil on stack, which is needed, if last mode was ommitted:
|
jbe@23
|
877 lua_pushnil(L);
|
jbe@23
|
878 // throw error, if number of commands is too high:
|
jbe/bsw@0
|
879 if (command_count > MONDELEFANT_MAX_COMMAND_COUNT) {
|
jbe/bsw@0
|
880 return luaL_error(L, "Exceeded maximum command count in one query.");
|
jbe/bsw@0
|
881 }
|
jbe@23
|
882 // create SQL string, store query modes and push SQL string on stack:
|
jbe/bsw@0
|
883 luaL_buffinit(L, &buf);
|
jbe/bsw@0
|
884 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
885 int mode;
|
jbe/bsw@0
|
886 int mode_idx; // stack index of mode string
|
jbe/bsw@0
|
887 if (command_idx) luaL_addchar(&buf, ' ');
|
jbe/bsw@0
|
888 lua_pushcfunction(L, mondelefant_conn_assemble_command);
|
jbe/bsw@0
|
889 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
890 lua_pushvalue(L, 2 + 2 * command_idx);
|
jbe/bsw@0
|
891 lua_call(L, 2, 1);
|
jbe/bsw@0
|
892 luaL_addvalue(&buf);
|
jbe/bsw@0
|
893 luaL_addchar(&buf, ';');
|
jbe/bsw@0
|
894 mode_idx = 3 + 2 * command_idx;
|
jbe/bsw@0
|
895 if (lua_isnil(L, mode_idx)) {
|
jbe/bsw@0
|
896 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
897 } else {
|
jbe/bsw@0
|
898 const char *modestr;
|
jbe/bsw@0
|
899 modestr = luaL_checkstring(L, mode_idx);
|
jbe/bsw@0
|
900 if (!strcmp(modestr, "list")) {
|
jbe/bsw@0
|
901 mode = MONDELEFANT_QUERY_MODE_LIST;
|
jbe/bsw@0
|
902 } else if (!strcmp(modestr, "object")) {
|
jbe/bsw@0
|
903 mode = MONDELEFANT_QUERY_MODE_OBJECT;
|
jbe/bsw@0
|
904 } else if (!strcmp(modestr, "opt_object")) {
|
jbe/bsw@0
|
905 mode = MONDELEFANT_QUERY_MODE_OPT_OBJECT;
|
jbe/bsw@0
|
906 } else {
|
jbe@397
|
907 return luaL_argerror(L, mode_idx, "unknown query mode");
|
jbe/bsw@0
|
908 }
|
jbe/bsw@0
|
909 }
|
jbe/bsw@0
|
910 modes[command_idx] = mode;
|
jbe/bsw@0
|
911 }
|
jbe/bsw@0
|
912 luaL_pushresult(&buf); // stack position unknown
|
jbe/bsw@0
|
913 lua_replace(L, 2); // SQL command string to stack position 2
|
jbe@23
|
914 // call sql_tracer, if set:
|
jbe/bsw@0
|
915 lua_settop(L, 2);
|
jbe/bsw@0
|
916 lua_getfield(L, 1, "sql_tracer"); // tracer at stack position 3
|
jbe/bsw@0
|
917 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
918 lua_pushvalue(L, 1); // 4
|
jbe/bsw@0
|
919 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
920 lua_call(L, 2, 1); // trace callback at stack position 3
|
jbe/bsw@0
|
921 }
|
jbe@23
|
922 // NOTE: If no tracer was found, then nil or false is stored at stack
|
jbe@23
|
923 // position 3.
|
jbe@23
|
924 // call PQsendQuery function and store result in 'sent_success' variable:
|
jbe/bsw@0
|
925 sent_success = PQsendQuery(conn->pgconn, lua_tostring(L, 2));
|
jbe@23
|
926 // create preliminary result table:
|
jbe/bsw@0
|
927 lua_newtable(L); // results in table at stack position 4
|
jbe@23
|
928 // iterate over results using function PQgetResult to fill result table:
|
jbe/bsw@0
|
929 for (command_idx = 0; ; command_idx++) {
|
jbe/bsw@0
|
930 int mode;
|
jbe/bsw@0
|
931 char binary[MONDELEFANT_MAX_COLUMN_COUNT];
|
jbe/bsw@0
|
932 ExecStatusType pgstatus;
|
jbe@23
|
933 // fetch mode which was given for the command:
|
jbe/bsw@0
|
934 mode = modes[command_idx];
|
jbe@23
|
935 // if PQsendQuery call was successful, then fetch result data:
|
jbe/bsw@0
|
936 if (sent_success) {
|
jbe@408
|
937 // avoid cumulating memory leaks in case of previous out-of-memory errors:
|
jbe@410
|
938 if (conn->todo_PQclear) {
|
jbe@410
|
939 PQclear(conn->todo_PQclear);
|
jbe@410
|
940 conn->todo_PQclear = NULL;
|
jbe@410
|
941 }
|
jbe@23
|
942 // NOTE: PQgetResult called one extra time. Break only, if all
|
jbe@23
|
943 // queries have been processed and PQgetResult returned NULL.
|
jbe/bsw@0
|
944 res = PQgetResult(conn->pgconn);
|
jbe/bsw@0
|
945 if (command_idx >= command_count && !res) break;
|
jbe/bsw@0
|
946 if (res) {
|
jbe/bsw@0
|
947 pgstatus = PQresultStatus(res);
|
jbe/bsw@0
|
948 rows = PQntuples(res);
|
jbe/bsw@0
|
949 cols = PQnfields(res);
|
jbe@410
|
950 // ensure call of PQclear in case of repeated Lua errors:
|
jbe@408
|
951 conn->todo_PQclear = res;
|
jbe/bsw@0
|
952 }
|
jbe/bsw@0
|
953 }
|
jbe@23
|
954 // handle errors:
|
jbe/bsw@0
|
955 if (
|
jbe/bsw@0
|
956 !sent_success || command_idx >= command_count || !res ||
|
jbe/bsw@0
|
957 (pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK) ||
|
jbe/bsw@0
|
958 (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) ||
|
jbe/bsw@0
|
959 (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST)
|
jbe/bsw@0
|
960 ) {
|
jbe/bsw@0
|
961 const char *command;
|
jbe/bsw@0
|
962 command = lua_tostring(L, 2);
|
jbe/bsw@0
|
963 lua_newtable(L); // 5
|
jbe@406
|
964 luaL_setmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY);
|
jbe/bsw@0
|
965 lua_pushvalue(L, 1);
|
jbe/bsw@0
|
966 lua_setfield(L, 5, "connection");
|
jbe/bsw@0
|
967 lua_pushvalue(L, 2);
|
jbe/bsw@0
|
968 lua_setfield(L, 5, "sql_command");
|
jbe@397
|
969 if (!sent_success) {
|
jbe@397
|
970 lua_pushliteral(L, MONDELEFANT_ERRCODE_CONNECTION);
|
jbe/bsw@0
|
971 lua_setfield(L, 5, "code");
|
jbe@397
|
972 mondelefant_push_first_line(L, PQerrorMessage(conn->pgconn));
|
jbe/bsw@0
|
973 lua_setfield(L, 5, "message");
|
jbe/bsw@0
|
974 } else {
|
jbe@397
|
975 lua_pushinteger(L, command_idx + 1);
|
jbe@397
|
976 lua_setfield(L, 5, "command_number");
|
jbe@397
|
977 if (!res) {
|
jbe@397
|
978 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_LOW);
|
jbe@397
|
979 lua_setfield(L, 5, "code");
|
jbe@397
|
980 lua_pushliteral(L, "Received too few database result sets.");
|
jbe@397
|
981 lua_setfield(L, 5, "message");
|
jbe@397
|
982 } else if (command_idx >= command_count) {
|
jbe@397
|
983 lua_pushliteral(L, MONDELEFANT_ERRCODE_RESULTCOUNT_HIGH);
|
jbe@397
|
984 lua_setfield(L, 5, "code");
|
jbe@397
|
985 lua_pushliteral(L, "Received too many database result sets.");
|
jbe@397
|
986 lua_setfield(L, 5, "message");
|
jbe@397
|
987 } else if (
|
jbe@397
|
988 pgstatus != PGRES_TUPLES_OK && pgstatus != PGRES_COMMAND_OK
|
jbe@397
|
989 ) {
|
jbe@397
|
990 const char *sqlstate;
|
jbe@397
|
991 const char *errmsg;
|
jbe@397
|
992 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SEVERITY));
|
jbe@397
|
993 lua_setfield(L, 5, "pg_severity");
|
jbe@397
|
994 sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
|
jbe@397
|
995 if (sqlstate) {
|
jbe@397
|
996 lua_pushstring(L, sqlstate);
|
jbe@397
|
997 lua_setfield(L, 5, "pg_sqlstate");
|
jbe@397
|
998 lua_pushstring(L, mondelefant_translate_errcode(sqlstate));
|
jbe@397
|
999 lua_setfield(L, 5, "code");
|
jbe@397
|
1000 } else {
|
jbe@397
|
1001 lua_pushliteral(L, MONDELEFANT_ERRCODE_UNKNOWN);
|
jbe@397
|
1002 lua_setfield(L, 5, "code");
|
jbe@397
|
1003 }
|
jbe@397
|
1004 errmsg = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
|
jbe@397
|
1005 if (errmsg) {
|
jbe@397
|
1006 mondelefant_push_first_line(L, errmsg);
|
jbe@397
|
1007 lua_setfield(L, 5, "message");
|
jbe@397
|
1008 lua_pushstring(L, errmsg);
|
jbe@397
|
1009 lua_setfield(L, 5, "pg_message_primary");
|
jbe@397
|
1010 } else {
|
jbe@397
|
1011 lua_pushliteral(L,
|
jbe@397
|
1012 "Error while fetching result, but no error message given."
|
jbe@397
|
1013 );
|
jbe@397
|
1014 lua_setfield(L, 5, "message");
|
jbe@397
|
1015 }
|
jbe@397
|
1016 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL));
|
jbe@397
|
1017 lua_setfield(L, 5, "pg_message_detail");
|
jbe@397
|
1018 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_MESSAGE_HINT));
|
jbe@397
|
1019 lua_setfield(L, 5, "pg_message_hint");
|
jbe@397
|
1020 // NOTE: "position" and "pg_internal_position" are recalculated to
|
jbe@397
|
1021 // byte offsets, as Lua 5.2 is not Unicode aware.
|
jbe@397
|
1022 {
|
jbe@397
|
1023 char *tmp;
|
jbe@397
|
1024 tmp = PQresultErrorField(res, PG_DIAG_STATEMENT_POSITION);
|
jbe@397
|
1025 if (tmp) {
|
jbe@397
|
1026 int pos;
|
jbe@397
|
1027 pos = atoi(tmp) - 1;
|
jbe@397
|
1028 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe@397
|
1029 pos = utf8_position_to_byte(command, pos);
|
jbe@397
|
1030 }
|
jbe@397
|
1031 lua_pushinteger(L, pos + 1);
|
jbe@397
|
1032 lua_setfield(L, 5, "position");
|
jbe@397
|
1033 }
|
jbe@397
|
1034 }
|
jbe@397
|
1035 {
|
jbe@397
|
1036 const char *internal_query;
|
jbe@397
|
1037 internal_query = PQresultErrorField(res, PG_DIAG_INTERNAL_QUERY);
|
jbe@397
|
1038 lua_pushstring(L, internal_query);
|
jbe@397
|
1039 lua_setfield(L, 5, "pg_internal_query");
|
jbe@397
|
1040 char *tmp;
|
jbe@397
|
1041 tmp = PQresultErrorField(res, PG_DIAG_INTERNAL_POSITION);
|
jbe@397
|
1042 if (tmp) {
|
jbe@397
|
1043 int pos;
|
jbe@397
|
1044 pos = atoi(tmp) - 1;
|
jbe@397
|
1045 if (conn->server_encoding == MONDELEFANT_SERVER_ENCODING_UTF8) {
|
jbe@397
|
1046 pos = utf8_position_to_byte(internal_query, pos);
|
jbe@397
|
1047 }
|
jbe@397
|
1048 lua_pushinteger(L, pos + 1);
|
jbe@397
|
1049 lua_setfield(L, 5, "pg_internal_position");
|
jbe@397
|
1050 }
|
jbe@397
|
1051 }
|
jbe@397
|
1052 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_CONTEXT));
|
jbe@397
|
1053 lua_setfield(L, 5, "pg_context");
|
jbe@397
|
1054 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FILE));
|
jbe@397
|
1055 lua_setfield(L, 5, "pg_source_file");
|
jbe@397
|
1056 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_LINE));
|
jbe@397
|
1057 lua_setfield(L, 5, "pg_source_line");
|
jbe@397
|
1058 lua_pushstring(L, PQresultErrorField(res, PG_DIAG_SOURCE_FUNCTION));
|
jbe@397
|
1059 lua_setfield(L, 5, "pg_source_function");
|
jbe@397
|
1060 } else if (rows < 1 && mode == MONDELEFANT_QUERY_MODE_OBJECT) {
|
jbe@397
|
1061 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_NO_ROWS);
|
jbe@397
|
1062 lua_setfield(L, 5, "code");
|
jbe@397
|
1063 lua_pushliteral(L, "Expected one row, but got empty set.");
|
jbe@397
|
1064 lua_setfield(L, 5, "message");
|
jbe@397
|
1065 } else if (rows > 1 && mode != MONDELEFANT_QUERY_MODE_LIST) {
|
jbe@397
|
1066 lua_pushliteral(L, MONDELEFANT_ERRCODE_QUERY1_MULTIPLE_ROWS);
|
jbe@397
|
1067 lua_setfield(L, 5, "code");
|
jbe@397
|
1068 lua_pushliteral(L, "Got more than one result row.");
|
jbe@397
|
1069 lua_setfield(L, 5, "message");
|
jbe@397
|
1070 } else {
|
jbe@397
|
1071 // should not happen
|
jbe@397
|
1072 abort();
|
jbe@397
|
1073 }
|
jbe@397
|
1074 if (res) {
|
jbe@397
|
1075 PQclear(res);
|
jbe@397
|
1076 while ((res = PQgetResult(conn->pgconn))) PQclear(res);
|
jbe@408
|
1077 // avoid double call of PQclear later:
|
jbe@408
|
1078 conn->todo_PQclear = NULL;
|
jbe@397
|
1079 }
|
jbe/bsw@0
|
1080 }
|
jbe/bsw@0
|
1081 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1082 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
1083 lua_pushvalue(L, 5);
|
jbe/bsw@0
|
1084 lua_call(L, 1, 0);
|
jbe/bsw@0
|
1085 }
|
jbe/bsw@0
|
1086 return 1;
|
jbe/bsw@0
|
1087 }
|
jbe@23
|
1088 // call "create_list" or "create_object" method of database handle,
|
jbe@23
|
1089 // result will be at stack position 5:
|
jbe/bsw@0
|
1090 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1091 lua_pushcfunction(L, mondelefant_conn_create_list); // 5
|
jbe/bsw@0
|
1092 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
1093 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
1094 } else {
|
jbe/bsw@0
|
1095 lua_pushcfunction(L, mondelefant_conn_create_object); // 5
|
jbe/bsw@0
|
1096 lua_pushvalue(L, 1); // 6
|
jbe/bsw@0
|
1097 lua_call(L, 1, 1); // 5
|
jbe/bsw@0
|
1098 }
|
jbe@23
|
1099 // set "_column_info":
|
jbe@23
|
1100 lua_newtable(L); // 6
|
jbe/bsw@0
|
1101 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1102 lua_newtable(L); // 7
|
jbe@380
|
1103 lua_pushstring(L, PQfname(res, col)); // 8
|
jbe@380
|
1104 lua_pushvalue(L, 8); // 9
|
jbe@380
|
1105 lua_pushvalue(L, 7); // 10
|
jbe@380
|
1106 lua_rawset(L, 6);
|
jbe/bsw@0
|
1107 lua_setfield(L, 7, "field_name");
|
jbe@380
|
1108 // _column_info entry (for current column) on stack position 7
|
jbe/bsw@0
|
1109 {
|
jbe/bsw@0
|
1110 Oid tmp;
|
jbe/bsw@0
|
1111 tmp = PQftable(res, col);
|
jbe/bsw@0
|
1112 if (tmp == InvalidOid) lua_pushnil(L);
|
jbe/bsw@0
|
1113 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1114 lua_setfield(L, 7, "table_oid");
|
jbe/bsw@0
|
1115 }
|
jbe/bsw@0
|
1116 {
|
jbe/bsw@0
|
1117 int tmp;
|
jbe/bsw@0
|
1118 tmp = PQftablecol(res, col);
|
jbe/bsw@0
|
1119 if (tmp == 0) lua_pushnil(L);
|
jbe/bsw@0
|
1120 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1121 lua_setfield(L, 7, "table_column_number");
|
jbe/bsw@0
|
1122 }
|
jbe/bsw@0
|
1123 {
|
jbe/bsw@0
|
1124 Oid tmp;
|
jbe/bsw@0
|
1125 tmp = PQftype(res, col);
|
jbe/bsw@0
|
1126 binary[col] = (tmp == MONDELEFANT_POSTGRESQL_BINARY_OID);
|
jbe/bsw@0
|
1127 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1128 lua_setfield(L, 7, "type_oid");
|
jbe/bsw@0
|
1129 lua_pushstring(L, mondelefant_oid_to_typestr(tmp));
|
jbe/bsw@0
|
1130 lua_setfield(L, 7, "type");
|
jbe/bsw@0
|
1131 }
|
jbe/bsw@0
|
1132 {
|
jbe/bsw@0
|
1133 int tmp;
|
jbe/bsw@0
|
1134 tmp = PQfmod(res, col);
|
jbe/bsw@0
|
1135 if (tmp == -1) lua_pushnil(L);
|
jbe/bsw@0
|
1136 else lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1137 lua_setfield(L, 7, "type_modifier");
|
jbe/bsw@0
|
1138 }
|
jbe/bsw@0
|
1139 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1140 }
|
jbe@23
|
1141 lua_setfield(L, 5, "_column_info");
|
jbe@23
|
1142 // set "_rows_affected":
|
jbe/bsw@0
|
1143 {
|
jbe/bsw@0
|
1144 char *tmp;
|
jbe/bsw@0
|
1145 tmp = PQcmdTuples(res);
|
jbe/bsw@0
|
1146 if (tmp[0]) {
|
jbe/bsw@0
|
1147 lua_pushinteger(L, atoi(tmp));
|
jbe/bsw@0
|
1148 lua_setfield(L, 5, "_rows_affected");
|
jbe/bsw@0
|
1149 }
|
jbe/bsw@0
|
1150 }
|
jbe@23
|
1151 // set "_oid":
|
jbe/bsw@0
|
1152 {
|
jbe/bsw@0
|
1153 Oid tmp;
|
jbe/bsw@0
|
1154 tmp = PQoidValue(res);
|
jbe/bsw@0
|
1155 if (tmp != InvalidOid) {
|
jbe/bsw@0
|
1156 lua_pushinteger(L, tmp);
|
jbe/bsw@0
|
1157 lua_setfield(L, 5, "_oid");
|
jbe/bsw@0
|
1158 }
|
jbe/bsw@0
|
1159 }
|
jbe@23
|
1160 // copy data as strings or nil, while performing binary unescaping
|
jbe@23
|
1161 // automatically:
|
jbe/bsw@0
|
1162 if (modes[command_idx] == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe/bsw@0
|
1163 for (row = 0; row < rows; row++) {
|
jbe/bsw@0
|
1164 lua_pushcfunction(L, mondelefant_conn_create_object); // 6
|
jbe/bsw@0
|
1165 lua_pushvalue(L, 1); // 7
|
jbe/bsw@0
|
1166 lua_call(L, 1, 1); // 6
|
jbe/bsw@0
|
1167 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1168 if (PQgetisnull(res, row, col)) {
|
jbe/bsw@0
|
1169 lua_pushnil(L);
|
jbe/bsw@0
|
1170 } else if (binary[col]) {
|
jbe/bsw@0
|
1171 size_t binlen;
|
jbe/bsw@0
|
1172 char *binval;
|
jbe/bsw@0
|
1173 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1174 (unsigned char *)PQgetvalue(res, row, col), &binlen
|
jbe/bsw@0
|
1175 );
|
jbe/bsw@0
|
1176 if (!binval) {
|
jbe/bsw@0
|
1177 return luaL_error(L,
|
jbe/bsw@0
|
1178 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1179 );
|
jbe/bsw@0
|
1180 }
|
jbe/bsw@0
|
1181 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1182 PQfreemem(binval);
|
jbe/bsw@0
|
1183 } else {
|
jbe/bsw@0
|
1184 lua_pushstring(L, PQgetvalue(res, row, col));
|
jbe/bsw@0
|
1185 }
|
jbe/bsw@0
|
1186 lua_rawseti(L, 6, col+1);
|
jbe/bsw@0
|
1187 }
|
jbe/bsw@0
|
1188 lua_rawseti(L, 5, row+1);
|
jbe/bsw@0
|
1189 }
|
jbe/bsw@0
|
1190 } else if (rows == 1) {
|
jbe/bsw@0
|
1191 for (col = 0; col < cols; col++) {
|
jbe/bsw@0
|
1192 if (PQgetisnull(res, 0, col)) {
|
jbe/bsw@0
|
1193 lua_pushnil(L);
|
jbe/bsw@0
|
1194 } else if (binary[col]) {
|
jbe/bsw@0
|
1195 size_t binlen;
|
jbe/bsw@0
|
1196 char *binval;
|
jbe/bsw@0
|
1197 binval = (char *)PQunescapeBytea(
|
jbe/bsw@0
|
1198 (unsigned char *)PQgetvalue(res, 0, col), &binlen
|
jbe/bsw@0
|
1199 );
|
jbe/bsw@0
|
1200 if (!binval) {
|
jbe/bsw@0
|
1201 return luaL_error(L,
|
jbe/bsw@0
|
1202 "Could not allocate memory for binary unescaping."
|
jbe/bsw@0
|
1203 );
|
jbe/bsw@0
|
1204 }
|
jbe/bsw@0
|
1205 lua_pushlstring(L, binval, binlen);
|
jbe/bsw@0
|
1206 PQfreemem(binval);
|
jbe/bsw@0
|
1207 } else {
|
jbe/bsw@0
|
1208 lua_pushstring(L, PQgetvalue(res, 0, col));
|
jbe/bsw@0
|
1209 }
|
jbe/bsw@0
|
1210 lua_rawseti(L, 5, col+1);
|
jbe/bsw@0
|
1211 }
|
jbe/bsw@0
|
1212 } else {
|
jbe/bsw@0
|
1213 // no row in optrow mode
|
jbe/bsw@0
|
1214 lua_pop(L, 1);
|
jbe/bsw@0
|
1215 lua_pushnil(L);
|
jbe/bsw@0
|
1216 }
|
jbe@23
|
1217 // save result in result list:
|
jbe/bsw@0
|
1218 lua_rawseti(L, 4, command_idx+1);
|
jbe@23
|
1219 // extra assertion:
|
jbe/bsw@0
|
1220 if (lua_gettop(L) != 4) abort(); // should not happen
|
jbe@23
|
1221 // free memory acquired by libpq:
|
jbe/bsw@0
|
1222 PQclear(res);
|
jbe@408
|
1223 // avoid double call of PQclear later:
|
jbe@408
|
1224 conn->todo_PQclear = NULL;
|
jbe/bsw@0
|
1225 }
|
jbe/bsw@0
|
1226 // trace callback at stack position 3
|
jbe/bsw@0
|
1227 // result at stack position 4 (top of stack)
|
jbe@23
|
1228 // if a trace callback is existent, then call:
|
jbe/bsw@0
|
1229 if (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1230 lua_pushvalue(L, 3);
|
jbe/bsw@0
|
1231 lua_call(L, 0, 0);
|
jbe/bsw@0
|
1232 }
|
jbe@23
|
1233 // put result at stack position 3:
|
jbe@23
|
1234 lua_replace(L, 3);
|
jbe@23
|
1235 // get output converter to stack position 4:
|
jbe@23
|
1236 lua_getfield(L, 1, "output_converter");
|
jbe@374
|
1237 // get mutability state saver to stack position 5:
|
jbe@375
|
1238 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
|
jbe@375
|
1239 lua_getfield(L, -1, "save_mutability_state");
|
jbe@375
|
1240 lua_replace(L, -2);
|
jbe@23
|
1241 // apply output converters and fill "_data" table according to column names:
|
jbe/bsw@0
|
1242 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1243 int mode;
|
jbe/bsw@0
|
1244 mode = modes[command_idx];
|
jbe@374
|
1245 lua_rawgeti(L, 3, command_idx+1); // raw result at stack position 6
|
jbe@374
|
1246 if (lua_toboolean(L, 6)) {
|
jbe@374
|
1247 lua_getfield(L, 6, "_column_info"); // column_info list at position 7
|
jbe@374
|
1248 cols = lua_rawlen(L, 7);
|
jbe/bsw@0
|
1249 if (mode == MONDELEFANT_QUERY_MODE_LIST) {
|
jbe@374
|
1250 rows = lua_rawlen(L, 6);
|
jbe/bsw@0
|
1251 for (row = 0; row < rows; row++) {
|
jbe@374
|
1252 lua_rawgeti(L, 6, row+1); // row at stack position 8
|
jbe@374
|
1253 lua_getfield(L, 8, "_data"); // _data table at stack position 9
|
jbe@375
|
1254 lua_getfield(L, 8, "_dirty"); // _dirty table at stack position 10
|
jbe/bsw@0
|
1255 for (col = 0; col < cols; col++) {
|
jbe@375
|
1256 lua_rawgeti(L, 7, col+1); // this column info at position 11
|
jbe@375
|
1257 lua_getfield(L, 11, "field_name"); // 12
|
jbe/bsw@0
|
1258 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1259 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1260 lua_pushvalue(L, 1); // connection
|
jbe@374
|
1261 lua_rawgeti(L, 8, col+1); // raw-value
|
jbe@375
|
1262 lua_pushvalue(L, 11); // this column info
|
jbe@375
|
1263 lua_call(L, 3, 1); // converted value at position 13
|
jbe/bsw@0
|
1264 } else {
|
jbe@375
|
1265 lua_rawgeti(L, 8, col+1); // raw-value at position 13
|
jbe/bsw@0
|
1266 }
|
jbe@375
|
1267 if (lua_toboolean(L, 5)) { // handle mutable values?
|
jbe@375
|
1268 lua_pushvalue(L, 12); // copy of field name
|
jbe@375
|
1269 lua_pushvalue(L, 5); // mutability state saver function
|
jbe@375
|
1270 lua_pushvalue(L, 13); // copy of value
|
jbe@375
|
1271 lua_call(L, 1, 1); // calculated mutability state of value
|
jbe@375
|
1272 lua_rawset(L, 10); // store mutability state in _dirty table
|
jbe@375
|
1273 }
|
jbe@375
|
1274 lua_pushvalue(L, 13); // 14
|
jbe@374
|
1275 lua_rawseti(L, 8, col+1);
|
jbe@374
|
1276 lua_rawset(L, 9);
|
jbe@399
|
1277 lua_settop(L, 10);
|
jbe/bsw@0
|
1278 }
|
jbe@374
|
1279 lua_settop(L, 7);
|
jbe/bsw@0
|
1280 }
|
jbe/bsw@0
|
1281 } else {
|
jbe@374
|
1282 lua_getfield(L, 6, "_data"); // _data table at stack position 8
|
jbe@375
|
1283 lua_getfield(L, 6, "_dirty"); // _dirty table at stack position 9
|
jbe/bsw@0
|
1284 for (col = 0; col < cols; col++) {
|
jbe@375
|
1285 lua_rawgeti(L, 7, col+1); // this column info at position 10
|
jbe@375
|
1286 lua_getfield(L, 10, "field_name"); // 11
|
jbe/bsw@0
|
1287 if (lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1288 lua_pushvalue(L, 4); // output-converter
|
jbe/bsw@0
|
1289 lua_pushvalue(L, 1); // connection
|
jbe@374
|
1290 lua_rawgeti(L, 6, col+1); // raw-value
|
jbe@375
|
1291 lua_pushvalue(L, 10); // this column info
|
jbe@375
|
1292 lua_call(L, 3, 1); // converted value at position 12
|
jbe/bsw@0
|
1293 } else {
|
jbe@375
|
1294 lua_rawgeti(L, 6, col+1); // raw-value at position 12
|
jbe/bsw@0
|
1295 }
|
jbe@375
|
1296 if (lua_toboolean(L, 5)) { // handle mutable values?
|
jbe@375
|
1297 lua_pushvalue(L, 11); // copy of field name
|
jbe@375
|
1298 lua_pushvalue(L, 5); // mutability state saver function
|
jbe@375
|
1299 lua_pushvalue(L, 12); // copy of value
|
jbe@375
|
1300 lua_call(L, 1, 1); // calculated mutability state of value
|
jbe@375
|
1301 lua_rawset(L, 9); // store mutability state in _dirty table
|
jbe@375
|
1302 }
|
jbe@375
|
1303 lua_pushvalue(L, 12); // 13
|
jbe@374
|
1304 lua_rawseti(L, 6, col+1);
|
jbe@374
|
1305 lua_rawset(L, 8);
|
jbe@399
|
1306 lua_settop(L, 9);
|
jbe/bsw@0
|
1307 }
|
jbe/bsw@0
|
1308 }
|
jbe/bsw@0
|
1309 }
|
jbe@374
|
1310 lua_settop(L, 5);
|
jbe/bsw@0
|
1311 }
|
jbe@23
|
1312 // return nil as first result value, followed by result lists/objects:
|
jbe/bsw@0
|
1313 lua_settop(L, 3);
|
jbe/bsw@0
|
1314 lua_pushnil(L);
|
jbe/bsw@0
|
1315 for (command_idx = 0; command_idx < command_count; command_idx++) {
|
jbe/bsw@0
|
1316 lua_rawgeti(L, 3, command_idx+1);
|
jbe/bsw@0
|
1317 }
|
jbe/bsw@0
|
1318 return command_count+1;
|
jbe/bsw@0
|
1319 }
|
jbe/bsw@0
|
1320
|
jbe@397
|
1321 // method "is_kind_of" of error objects:
|
jbe@397
|
1322 static int mondelefant_errorobject_is_kind_of(lua_State *L) {
|
jbe@397
|
1323 const char *errclass;
|
jbe@397
|
1324 luaL_checktype(L, 1, LUA_TTABLE);
|
jbe@397
|
1325 errclass = luaL_checkstring(L, 2);
|
jbe@397
|
1326 lua_settop(L, 2);
|
jbe@397
|
1327 lua_getfield(L, 1, "code"); // 3
|
jbe@397
|
1328 luaL_argcheck(L,
|
jbe@397
|
1329 lua_type(L, 3) == LUA_TSTRING,
|
jbe@397
|
1330 1,
|
jbe@397
|
1331 "field 'code' of error object is not a string"
|
jbe@397
|
1332 );
|
jbe@397
|
1333 lua_pushboolean(L,
|
jbe@397
|
1334 mondelefant_check_error_class(lua_tostring(L, 3), errclass)
|
jbe@397
|
1335 );
|
jbe@397
|
1336 return 1;
|
jbe@397
|
1337 }
|
jbe@397
|
1338
|
jbe@397
|
1339 // method "wait" of database handles:
|
jbe@397
|
1340 static int mondelefant_conn_wait(lua_State *L) {
|
jbe@397
|
1341 int argc;
|
jbe@397
|
1342 // count number of arguments:
|
jbe@397
|
1343 argc = lua_gettop(L);
|
jbe@397
|
1344 // insert "try_wait" function/method at stack position 1:
|
jbe@397
|
1345 lua_pushcfunction(L, mondelefant_conn_try_wait);
|
jbe@397
|
1346 lua_insert(L, 1);
|
jbe@397
|
1347 // call "try_wait" method:
|
jbe@397
|
1348 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
|
jbe@397
|
1349 // check, if error occurred:
|
jbe@397
|
1350 if (lua_toboolean(L, 1)) {
|
jbe@397
|
1351 // raise error
|
jbe/bsw@0
|
1352 lua_settop(L, 1);
|
jbe/bsw@0
|
1353 return lua_error(L);
|
jbe/bsw@0
|
1354 } else {
|
jbe@397
|
1355 // return everything but nil error object:
|
jbe@397
|
1356 return lua_gettop(L) - 1;
|
jbe/bsw@0
|
1357 }
|
jbe/bsw@0
|
1358 }
|
jbe/bsw@0
|
1359
|
jbe@23
|
1360 // method "query" of database handles:
|
jbe/bsw@0
|
1361 static int mondelefant_conn_query(lua_State *L) {
|
jbe/bsw@0
|
1362 int argc;
|
jbe@23
|
1363 // count number of arguments:
|
jbe/bsw@0
|
1364 argc = lua_gettop(L);
|
jbe@23
|
1365 // insert "try_query" function/method at stack position 1:
|
jbe/bsw@0
|
1366 lua_pushcfunction(L, mondelefant_conn_try_query);
|
jbe@23
|
1367 lua_insert(L, 1);
|
jbe@23
|
1368 // call "try_query" method:
|
jbe@23
|
1369 lua_call(L, argc, LUA_MULTRET); // results (with error) starting at index 1
|
jbe@23
|
1370 // check, if error occurred:
|
jbe@23
|
1371 if (lua_toboolean(L, 1)) {
|
jbe@397
|
1372 // raise error
|
jbe@397
|
1373 lua_settop(L, 1);
|
jbe@397
|
1374 return lua_error(L);
|
jbe/bsw@0
|
1375 } else {
|
jbe@23
|
1376 // return everything but nil error object:
|
jbe@23
|
1377 return lua_gettop(L) - 1;
|
jbe/bsw@0
|
1378 }
|
jbe/bsw@0
|
1379 }
|
jbe/bsw@0
|
1380
|
jbe@23
|
1381 // library function "set_class":
|
jbe/bsw@0
|
1382 static int mondelefant_set_class(lua_State *L) {
|
jbe@23
|
1383 // ensure that first argument is a database result list/object:
|
jbe/bsw@0
|
1384 lua_settop(L, 2);
|
jbe/bsw@0
|
1385 lua_getmetatable(L, 1); // 3
|
jbe/bsw@0
|
1386 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_RESULT_MT_REGKEY); // 4
|
jbe@64
|
1387 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 1, "not a database result");
|
jbe@23
|
1388 // ensure that second argument is a database class (model):
|
jbe/bsw@0
|
1389 lua_settop(L, 2);
|
jbe/bsw@0
|
1390 lua_getmetatable(L, 2); // 3
|
jbe/bsw@0
|
1391 lua_getfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_MT_REGKEY); // 4
|
jbe@64
|
1392 luaL_argcheck(L, lua_compare(L, 3, 4, LUA_OPEQ), 2, "not a database class");
|
jbe@23
|
1393 // set attribute "_class" of result list/object to given class:
|
jbe/bsw@0
|
1394 lua_settop(L, 2);
|
jbe/bsw@0
|
1395 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1396 lua_setfield(L, 1, "_class");
|
jbe@23
|
1397 // test, if database result is a list (and not a single object):
|
jbe/bsw@0
|
1398 lua_getfield(L, 1, "_type"); // 3
|
jbe/bsw@0
|
1399 lua_pushliteral(L, "list"); // 4
|
jbe/bsw@0
|
1400 if (lua_rawequal(L, 3, 4)) {
|
jbe/bsw@0
|
1401 int i;
|
jbe@23
|
1402 // set attribute "_class" of all elements to given class:
|
jbe@64
|
1403 for (i=0; i < lua_rawlen(L, 1); i++) {
|
jbe/bsw@0
|
1404 lua_settop(L, 2);
|
jbe/bsw@0
|
1405 lua_rawgeti(L, 1, i+1); // 3
|
jbe/bsw@0
|
1406 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1407 lua_setfield(L, 3, "_class");
|
jbe/bsw@0
|
1408 }
|
jbe/bsw@0
|
1409 }
|
jbe@23
|
1410 // return first argument:
|
jbe/bsw@0
|
1411 lua_settop(L, 1);
|
jbe/bsw@0
|
1412 return 1;
|
jbe/bsw@0
|
1413 }
|
jbe/bsw@0
|
1414
|
jbe@23
|
1415 // library function "new_class":
|
jbe/bsw@0
|
1416 static int mondelefant_new_class(lua_State *L) {
|
jbe@397
|
1417 // if no argument is given, use an empty table:
|
jbe@397
|
1418 if (lua_isnoneornil(L, 1)) {
|
jbe/bsw@0
|
1419 lua_settop(L, 0);
|
jbe/bsw@0
|
1420 lua_newtable(L); // 1
|
jbe@397
|
1421 } else {
|
jbe@397
|
1422 luaL_checktype(L, 1, LUA_TTABLE);
|
jbe@397
|
1423 lua_settop(L, 1);
|
jbe/bsw@0
|
1424 }
|
jbe@23
|
1425 // set meta-table for database classes (models):
|
jbe@406
|
1426 luaL_setmetatable(L, MONDELEFANT_CLASS_MT_REGKEY);
|
jbe@23
|
1427 // check, if "prototype" attribute is not set:
|
jbe/bsw@0
|
1428 lua_pushliteral(L, "prototype"); // 2
|
jbe/bsw@0
|
1429 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1430 if (!lua_toboolean(L, 2)) {
|
jbe@23
|
1431 // set "prototype" attribute to default prototype:
|
jbe/bsw@0
|
1432 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1433 lua_getfield(L,
|
jbe/bsw@0
|
1434 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1435 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1436 ); // 4
|
jbe/bsw@0
|
1437 lua_rawset(L, 1);
|
jbe/bsw@0
|
1438 }
|
jbe@23
|
1439 // set "object" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1440 lua_settop(L, 1);
|
jbe/bsw@0
|
1441 lua_pushliteral(L, "object"); // 2
|
jbe/bsw@0
|
1442 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1443 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1444 lua_pushliteral(L, "object"); // 3
|
jbe/bsw@0
|
1445 lua_newtable(L); // 4
|
jbe/bsw@0
|
1446 lua_rawset(L, 1);
|
jbe/bsw@0
|
1447 }
|
jbe@23
|
1448 // set "object_get" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1449 lua_settop(L, 1);
|
jbe/bsw@0
|
1450 lua_pushliteral(L, "object_get"); // 2
|
jbe/bsw@0
|
1451 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1452 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1453 lua_pushliteral(L, "object_get"); // 3
|
jbe/bsw@0
|
1454 lua_newtable(L); // 4
|
jbe/bsw@0
|
1455 lua_rawset(L, 1);
|
jbe/bsw@0
|
1456 }
|
jbe@23
|
1457 // set "object_set" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1458 lua_settop(L, 1);
|
jbe/bsw@0
|
1459 lua_pushliteral(L, "object_set"); // 2
|
jbe/bsw@0
|
1460 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1461 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1462 lua_pushliteral(L, "object_set"); // 3
|
jbe/bsw@0
|
1463 lua_newtable(L); // 4
|
jbe/bsw@0
|
1464 lua_rawset(L, 1);
|
jbe/bsw@0
|
1465 }
|
jbe@23
|
1466 // set "list" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1467 lua_settop(L, 1);
|
jbe/bsw@0
|
1468 lua_pushliteral(L, "list"); // 2
|
jbe/bsw@0
|
1469 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1470 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1471 lua_pushliteral(L, "list"); // 3
|
jbe/bsw@0
|
1472 lua_newtable(L); // 4
|
jbe/bsw@0
|
1473 lua_rawset(L, 1);
|
jbe/bsw@0
|
1474 }
|
jbe@23
|
1475 // set "references" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1476 lua_settop(L, 1);
|
jbe/bsw@0
|
1477 lua_pushliteral(L, "references"); // 2
|
jbe/bsw@0
|
1478 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1479 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1480 lua_pushliteral(L, "references"); // 3
|
jbe/bsw@0
|
1481 lua_newtable(L); // 4
|
jbe/bsw@0
|
1482 lua_rawset(L, 1);
|
jbe/bsw@0
|
1483 }
|
jbe@23
|
1484 // set "foreign_keys" attribute to empty table, unless it is already set:
|
jbe/bsw@0
|
1485 lua_settop(L, 1);
|
jbe/bsw@0
|
1486 lua_pushliteral(L, "foreign_keys"); // 2
|
jbe/bsw@0
|
1487 lua_rawget(L, 1); // 2
|
jbe/bsw@0
|
1488 if (!lua_toboolean(L, 2)) {
|
jbe/bsw@0
|
1489 lua_pushliteral(L, "foreign_keys"); // 3
|
jbe/bsw@0
|
1490 lua_newtable(L); // 4
|
jbe/bsw@0
|
1491 lua_rawset(L, 1);
|
jbe/bsw@0
|
1492 }
|
jbe@23
|
1493 // return table:
|
jbe/bsw@0
|
1494 lua_settop(L, 1);
|
jbe/bsw@0
|
1495 return 1;
|
jbe/bsw@0
|
1496 }
|
jbe/bsw@0
|
1497
|
jbe@23
|
1498 // method "get_reference" of classes (models):
|
jbe/bsw@0
|
1499 static int mondelefant_class_get_reference(lua_State *L) {
|
jbe/bsw@0
|
1500 lua_settop(L, 2);
|
jbe/bsw@0
|
1501 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1502 // get "references" table:
|
jbe/bsw@0
|
1503 lua_getfield(L, 1, "references"); // 3
|
jbe@23
|
1504 // perform lookup:
|
jbe/bsw@0
|
1505 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1506 lua_gettable(L, 3); // 4
|
jbe@23
|
1507 // return result, if lookup was successful:
|
jbe/bsw@0
|
1508 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1509 // replace current table by its prototype:
|
jbe/bsw@0
|
1510 lua_settop(L, 2);
|
jbe/bsw@0
|
1511 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1512 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1513 lua_replace(L, 1);
|
jbe/bsw@0
|
1514 }
|
jbe@23
|
1515 // return nothing:
|
jbe/bsw@0
|
1516 return 0;
|
jbe/bsw@0
|
1517 }
|
jbe/bsw@0
|
1518
|
jbe@23
|
1519 // method "iterate_over_references" of classes (models):
|
jbe/bsw@0
|
1520 static int mondelefant_class_iterate_over_references(lua_State *L) {
|
jbe/bsw@0
|
1521 return luaL_error(L, "Reference iterator not implemented yet."); // TODO
|
jbe/bsw@0
|
1522 }
|
jbe/bsw@0
|
1523
|
jbe@23
|
1524 // method "get_foreign_key_reference_name" of classes (models):
|
jbe/bsw@0
|
1525 static int mondelefant_class_get_foreign_key_reference_name(lua_State *L) {
|
jbe/bsw@0
|
1526 lua_settop(L, 2);
|
jbe/bsw@0
|
1527 while (lua_toboolean(L, 1)) {
|
jbe@23
|
1528 // get "foreign_keys" table:
|
jbe/bsw@0
|
1529 lua_getfield(L, 1, "foreign_keys"); // 3
|
jbe@23
|
1530 // perform lookup:
|
jbe/bsw@0
|
1531 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1532 lua_gettable(L, 3); // 4
|
jbe@23
|
1533 // return result, if lookup was successful:
|
jbe/bsw@0
|
1534 if (!lua_isnil(L, 4)) return 1;
|
jbe@23
|
1535 // replace current table by its prototype:
|
jbe/bsw@0
|
1536 lua_settop(L, 2);
|
jbe/bsw@0
|
1537 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1538 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1539 lua_replace(L, 1);
|
jbe/bsw@0
|
1540 }
|
jbe@23
|
1541 // return nothing:
|
jbe/bsw@0
|
1542 return 0;
|
jbe/bsw@0
|
1543 }
|
jbe/bsw@0
|
1544
|
jbe@23
|
1545 // meta-method "__index" of database result lists and objects:
|
jbe/bsw@0
|
1546 static int mondelefant_result_index(lua_State *L) {
|
jbe/bsw@0
|
1547 const char *result_type;
|
jbe@23
|
1548 // only lookup, when key is a string not beginning with an underscore:
|
jbe/bsw@0
|
1549 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe@23
|
1550 return 0;
|
jbe/bsw@0
|
1551 }
|
jbe@384
|
1552 // value of "_class" attribute or default class on stack position 3:
|
jbe@23
|
1553 lua_settop(L, 2);
|
jbe/bsw@0
|
1554 lua_getfield(L, 1, "_class"); // 3
|
jbe/bsw@0
|
1555 if (!lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1556 lua_settop(L, 2);
|
jbe/bsw@0
|
1557 lua_getfield(L,
|
jbe/bsw@0
|
1558 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1559 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1560 ); // 3
|
jbe/bsw@0
|
1561 }
|
jbe@23
|
1562 // get value of "_type" attribute:
|
jbe/bsw@0
|
1563 lua_getfield(L, 1, "_type"); // 4
|
jbe/bsw@0
|
1564 result_type = lua_tostring(L, 4);
|
jbe@23
|
1565 // different lookup for lists and objects:
|
jbe@23
|
1566 if (result_type && !strcmp(result_type, "object")) { // object
|
jbe/bsw@0
|
1567 lua_settop(L, 3);
|
jbe@384
|
1568 // try inherited attributes, methods or getter functions:
|
jbe@383
|
1569 lua_pushvalue(L, 3); // 4
|
jbe@383
|
1570 while (lua_toboolean(L, 4)) {
|
jbe@383
|
1571 lua_getfield(L, 4, "object"); // 5
|
jbe@383
|
1572 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1573 lua_gettable(L, 5); // 6
|
jbe@383
|
1574 if (!lua_isnil(L, 6)) return 1;
|
jbe@383
|
1575 lua_settop(L, 4);
|
jbe@383
|
1576 lua_getfield(L, 4, "object_get"); // 5
|
jbe@383
|
1577 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1578 lua_gettable(L, 5); // 6
|
jbe@383
|
1579 if (lua_toboolean(L, 6)) {
|
jbe@383
|
1580 lua_pushvalue(L, 1); // 7
|
jbe@383
|
1581 lua_call(L, 1, 1); // 6
|
jbe/bsw@0
|
1582 return 1;
|
jbe/bsw@0
|
1583 }
|
jbe@383
|
1584 lua_settop(L, 4);
|
jbe@383
|
1585 lua_pushliteral(L, "prototype"); // 5
|
jbe@383
|
1586 lua_rawget(L, 4); // 5
|
jbe@383
|
1587 lua_replace(L, 4);
|
jbe/bsw@0
|
1588 }
|
jbe@383
|
1589 lua_settop(L, 3);
|
jbe/bsw@0
|
1590 // try primary keys of referenced objects:
|
jbe/bsw@0
|
1591 lua_pushcfunction(L,
|
jbe/bsw@0
|
1592 mondelefant_class_get_foreign_key_reference_name
|
jbe@383
|
1593 ); // 4
|
jbe@383
|
1594 lua_pushvalue(L, 3); // 5
|
jbe@383
|
1595 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1596 lua_call(L, 2, 1); // 4
|
jbe@383
|
1597 if (!lua_isnil(L, 4)) {
|
jbe@383
|
1598 // reference name at stack position 4
|
jbe@383
|
1599 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
|
jbe@382
|
1600 lua_pushvalue(L, 3); // 6
|
jbe@383
|
1601 lua_pushvalue(L, 4); // 7
|
jbe@383
|
1602 lua_call(L, 2, 1); // reference info at stack position 5
|
jbe@383
|
1603 lua_getfield(L, 1, "_ref"); // 6
|
jbe@383
|
1604 lua_getfield(L, 5, "ref"); // 7
|
jbe@383
|
1605 lua_gettable(L, 6); // 7
|
jbe@383
|
1606 if (!lua_isnil(L, 7)) {
|
jbe@383
|
1607 if (lua_toboolean(L, 7)) {
|
jbe@383
|
1608 lua_getfield(L, 5, "that_key"); // 8
|
jbe@383
|
1609 if (lua_isnil(L, 8)) {
|
jbe/bsw@0
|
1610 return luaL_error(L, "Missing 'that_key' entry in model reference.");
|
jbe/bsw@0
|
1611 }
|
jbe@383
|
1612 lua_gettable(L, 7); // 8
|
jbe/bsw@0
|
1613 } else {
|
jbe/bsw@0
|
1614 lua_pushnil(L);
|
jbe/bsw@0
|
1615 }
|
jbe/bsw@0
|
1616 return 1;
|
jbe/bsw@0
|
1617 }
|
jbe/bsw@0
|
1618 }
|
jbe@383
|
1619 lua_settop(L, 3);
|
jbe@383
|
1620 lua_getfield(L, 1, "_data"); // _data table on stack position 4
|
jbe/bsw@0
|
1621 // try normal data field info:
|
jbe@383
|
1622 lua_pushvalue(L, 2); // 5
|
jbe@383
|
1623 lua_gettable(L, 4); // 5
|
jbe@383
|
1624 if (!lua_isnil(L, 5)) return 1;
|
jbe@383
|
1625 lua_settop(L, 4); // keep _data table on stack
|
jbe/bsw@0
|
1626 // try cached referenced object (or cached NULL reference):
|
jbe@383
|
1627 lua_getfield(L, 1, "_ref"); // 5
|
jbe@383
|
1628 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1629 lua_gettable(L, 5); // 6
|
jbe@383
|
1630 if (lua_isboolean(L, 6) && !lua_toboolean(L, 6)) {
|
jbe/bsw@0
|
1631 lua_pushnil(L);
|
jbe/bsw@0
|
1632 return 1;
|
jbe@383
|
1633 } else if (!lua_isnil(L, 6)) {
|
jbe/bsw@0
|
1634 return 1;
|
jbe/bsw@0
|
1635 }
|
jbe@383
|
1636 lua_settop(L, 4);
|
jbe/bsw@0
|
1637 // try to load a referenced object:
|
jbe@383
|
1638 lua_pushcfunction(L, mondelefant_class_get_reference); // 5
|
jbe@383
|
1639 lua_pushvalue(L, 3); // 6
|
jbe@383
|
1640 lua_pushvalue(L, 2); // 7
|
jbe@383
|
1641 lua_call(L, 2, 1); // 5
|
jbe@383
|
1642 if (!lua_isnil(L, 5)) {
|
jbe/bsw@0
|
1643 lua_settop(L, 2);
|
jbe/bsw@0
|
1644 lua_getfield(L, 1, "load"); // 3
|
jbe/bsw@0
|
1645 lua_pushvalue(L, 1); // 4 (self)
|
jbe/bsw@0
|
1646 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1647 lua_call(L, 2, 0);
|
jbe/bsw@0
|
1648 lua_settop(L, 2);
|
jbe/bsw@0
|
1649 lua_getfield(L, 1, "_ref"); // 3
|
jbe/bsw@0
|
1650 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1651 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1652 if (lua_isboolean(L, 4) && !lua_toboolean(L, 4)) lua_pushnil(L); // TODO: use special object instead of false
|
jbe/bsw@0
|
1653 return 1;
|
jbe/bsw@0
|
1654 }
|
jbe@383
|
1655 lua_settop(L, 4);
|
jbe@383
|
1656 // try proxy access to document in special column:
|
jbe@383
|
1657 lua_getfield(L, 3, "document_column"); // 5
|
jbe@383
|
1658 if (lua_toboolean(L, 5)) {
|
jbe@383
|
1659 lua_gettable(L, 4); // 5
|
jbe@383
|
1660 if (!lua_isnil(L, 5)) {
|
jbe@383
|
1661 lua_pushvalue(L, 2); // 6
|
jbe@383
|
1662 lua_gettable(L, 5); // 6
|
jbe@383
|
1663 if (!lua_isnil(L, 6)) return 1;
|
jbe@383
|
1664 }
|
jbe@383
|
1665 }
|
jbe/bsw@0
|
1666 return 0;
|
jbe@23
|
1667 } else if (result_type && !strcmp(result_type, "list")) { // list
|
jbe/bsw@0
|
1668 lua_settop(L, 3);
|
jbe/bsw@0
|
1669 // try inherited list attributes or methods:
|
jbe/bsw@0
|
1670 while (lua_toboolean(L, 3)) {
|
jbe/bsw@0
|
1671 lua_getfield(L, 3, "list"); // 4
|
jbe/bsw@0
|
1672 lua_pushvalue(L, 2); // 5
|
jbe/bsw@0
|
1673 lua_gettable(L, 4); // 5
|
jbe/bsw@0
|
1674 if (!lua_isnil(L, 5)) return 1;
|
jbe/bsw@0
|
1675 lua_settop(L, 3);
|
jbe/bsw@0
|
1676 lua_pushliteral(L, "prototype"); // 4
|
jbe/bsw@0
|
1677 lua_rawget(L, 3); // 4
|
jbe/bsw@0
|
1678 lua_replace(L, 3);
|
jbe/bsw@0
|
1679 }
|
jbe/bsw@0
|
1680 }
|
jbe@23
|
1681 // return nothing:
|
jbe/bsw@0
|
1682 return 0;
|
jbe/bsw@0
|
1683 }
|
jbe/bsw@0
|
1684
|
jbe@23
|
1685 // meta-method "__newindex" of database result lists and objects:
|
jbe/bsw@0
|
1686 static int mondelefant_result_newindex(lua_State *L) {
|
jbe/bsw@0
|
1687 const char *result_type;
|
jbe@23
|
1688 // perform rawset, unless key is a string not starting with underscore:
|
jbe/bsw@0
|
1689 lua_settop(L, 3);
|
jbe/bsw@0
|
1690 if (lua_type(L, 2) != LUA_TSTRING || lua_tostring(L, 2)[0] == '_') {
|
jbe/bsw@0
|
1691 lua_rawset(L, 1);
|
jbe/bsw@0
|
1692 return 1;
|
jbe/bsw@0
|
1693 }
|
jbe@384
|
1694 // value of "_class" attribute or default class on stack position 4:
|
jbe@384
|
1695 lua_settop(L, 3);
|
jbe/bsw@0
|
1696 lua_getfield(L, 1, "_class"); // 4
|
jbe/bsw@0
|
1697 if (!lua_toboolean(L, 4)) {
|
jbe/bsw@0
|
1698 lua_settop(L, 3);
|
jbe/bsw@0
|
1699 lua_getfield(L,
|
jbe/bsw@0
|
1700 LUA_REGISTRYINDEX,
|
jbe/bsw@0
|
1701 MONDELEFANT_CLASS_PROTO_REGKEY
|
jbe/bsw@0
|
1702 ); // 4
|
jbe/bsw@0
|
1703 }
|
jbe@23
|
1704 // get value of "_type" attribute:
|
jbe/bsw@0
|
1705 lua_getfield(L, 1, "_type"); // 5
|
jbe/bsw@0
|
1706 result_type = lua_tostring(L, 5);
|
jbe@378
|
1707 // distinguish between lists and objects:
|
jbe@378
|
1708 if (result_type && !strcmp(result_type, "object")) { // objects
|
jbe@378
|
1709 lua_settop(L, 4);
|
jbe@378
|
1710 // try object setter functions:
|
jbe@384
|
1711 lua_pushvalue(L, 4); // 5
|
jbe@384
|
1712 while (lua_toboolean(L, 5)) {
|
jbe@384
|
1713 lua_getfield(L, 5, "object_set"); // 6
|
jbe@384
|
1714 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1715 lua_gettable(L, 6); // 7
|
jbe@384
|
1716 if (lua_toboolean(L, 7)) {
|
jbe@384
|
1717 lua_pushvalue(L, 1); // 8
|
jbe@384
|
1718 lua_pushvalue(L, 3); // 9
|
jbe@378
|
1719 lua_call(L, 2, 0);
|
jbe@378
|
1720 return 0;
|
jbe@378
|
1721 }
|
jbe@384
|
1722 lua_settop(L, 5);
|
jbe@384
|
1723 lua_pushliteral(L, "prototype"); // 6
|
jbe@384
|
1724 lua_rawget(L, 5); // 6
|
jbe@384
|
1725 lua_replace(L, 5);
|
jbe@378
|
1726 }
|
jbe@384
|
1727 lua_settop(L, 4);
|
jbe@384
|
1728 lua_getfield(L, 1, "_data"); // _data table on stack position 5
|
jbe/bsw@0
|
1729 // check, if a object reference is changed:
|
jbe@384
|
1730 lua_pushcfunction(L, mondelefant_class_get_reference); // 6
|
jbe@384
|
1731 lua_pushvalue(L, 4); // 7
|
jbe@384
|
1732 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1733 lua_call(L, 2, 1); // 6
|
jbe@384
|
1734 if (!lua_isnil(L, 6)) {
|
jbe/bsw@0
|
1735 // store object in _ref table (use false for nil): // TODO: use special object instead of false
|
jbe@384
|
1736 lua_getfield(L, 1, "_ref"); // 7
|
jbe@384
|
1737 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1738 if (lua_isnil(L, 3)) lua_pushboolean(L, 0); // 9
|
jbe@384
|
1739 else lua_pushvalue(L, 3); // 9
|
jbe@384
|
1740 lua_settable(L, 7);
|
jbe@384
|
1741 lua_settop(L, 6);
|
jbe/bsw@0
|
1742 // delete referencing key from _data table:
|
jbe@384
|
1743 lua_getfield(L, 6, "this_key"); // 7
|
jbe@384
|
1744 if (lua_isnil(L, 7)) {
|
jbe/bsw@0
|
1745 return luaL_error(L, "Missing 'this_key' entry in model reference.");
|
jbe/bsw@0
|
1746 }
|
jbe@384
|
1747 lua_pushvalue(L, 7); // 8
|
jbe@384
|
1748 lua_pushnil(L); // 9
|
jbe@384
|
1749 lua_settable(L, 5);
|
jbe@384
|
1750 lua_getfield(L, 1, "_dirty"); // 8
|
jbe@384
|
1751 lua_pushvalue(L, 7); // 9
|
jbe@384
|
1752 lua_pushboolean(L, 1); // 10
|
jbe@384
|
1753 lua_settable(L, 8);
|
jbe@384
|
1754 return 0;
|
jbe@384
|
1755 }
|
jbe@384
|
1756 lua_settop(L, 5);
|
jbe@384
|
1757 // check proxy access to document in special column:
|
jbe@384
|
1758 lua_getfield(L, 4, "document_column"); // 6
|
jbe@384
|
1759 if (lua_toboolean(L, 6)) {
|
jbe@384
|
1760 lua_getfield(L, 1, "_column_info"); // 7
|
jbe@401
|
1761 if (!lua_isnil(L, 7)) { // TODO: quick fix to avoid problems on document creation
|
jbe@384
|
1762 lua_pushvalue(L, 2); // 8
|
jbe@384
|
1763 lua_gettable(L, 7); // 8
|
jbe@400
|
1764 if (!lua_toboolean(L, 8)) {
|
jbe@384
|
1765 lua_settop(L, 6);
|
jbe@384
|
1766 lua_gettable(L, 5); // 6
|
jbe@384
|
1767 if (lua_isnil(L, 6)) {
|
jbe@384
|
1768 return luaL_error(L, "Cannot write to document column: document is nil");
|
jbe@384
|
1769 }
|
jbe@384
|
1770 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1771 lua_pushvalue(L, 3); // 8
|
jbe@384
|
1772 lua_settable(L, 6);
|
jbe@384
|
1773 return 0;
|
jbe@384
|
1774 }
|
jbe@401
|
1775 } // TODO: quick fix to avoid problems on document creation
|
jbe@384
|
1776 }
|
jbe@384
|
1777 lua_settop(L, 5);
|
jbe@384
|
1778 // store value in data field info:
|
jbe@384
|
1779 lua_pushvalue(L, 2); // 6
|
jbe@384
|
1780 lua_pushvalue(L, 3); // 7
|
jbe@384
|
1781 lua_settable(L, 5);
|
jbe@384
|
1782 lua_settop(L, 4);
|
jbe@384
|
1783 // mark field as dirty (needs to be UPDATEd on save):
|
jbe@384
|
1784 lua_getfield(L, 1, "_dirty"); // 5
|
jbe@384
|
1785 lua_pushvalue(L, 2); // 6
|
jbe@384
|
1786 lua_pushboolean(L, 1); // 7
|
jbe@384
|
1787 lua_settable(L, 5);
|
jbe@384
|
1788 lua_settop(L, 4);
|
jbe@384
|
1789 // reset reference cache, if neccessary:
|
jbe@384
|
1790 lua_pushcfunction(L,
|
jbe@384
|
1791 mondelefant_class_get_foreign_key_reference_name
|
jbe@384
|
1792 ); // 5
|
jbe@384
|
1793 lua_pushvalue(L, 4); // 6
|
jbe@384
|
1794 lua_pushvalue(L, 2); // 7
|
jbe@384
|
1795 lua_call(L, 2, 1); // 5
|
jbe@384
|
1796 if (!lua_isnil(L, 5)) {
|
jbe@384
|
1797 lua_getfield(L, 1, "_ref"); // 6
|
jbe@382
|
1798 lua_pushvalue(L, 5); // 7
|
jbe@382
|
1799 lua_pushnil(L); // 8
|
jbe@382
|
1800 lua_settable(L, 6);
|
jbe/bsw@0
|
1801 }
|
jbe/bsw@0
|
1802 return 0;
|
jbe@23
|
1803 } else { // non-objects (i.e. lists)
|
jbe@23
|
1804 // perform rawset:
|
jbe/bsw@0
|
1805 lua_settop(L, 3);
|
jbe/bsw@0
|
1806 lua_rawset(L, 1);
|
jbe/bsw@0
|
1807 return 0;
|
jbe/bsw@0
|
1808 }
|
jbe/bsw@0
|
1809 }
|
jbe/bsw@0
|
1810
|
jbe@23
|
1811 // meta-method "__index" of classes (models):
|
jbe/bsw@0
|
1812 static int mondelefant_class_index(lua_State *L) {
|
jbe@23
|
1813 // perform lookup in prototype:
|
jbe/bsw@0
|
1814 lua_settop(L, 2);
|
jbe/bsw@0
|
1815 lua_pushliteral(L, "prototype"); // 3
|
jbe/bsw@0
|
1816 lua_rawget(L, 1); // 3
|
jbe/bsw@0
|
1817 lua_pushvalue(L, 2); // 4
|
jbe/bsw@0
|
1818 lua_gettable(L, 3); // 4
|
jbe/bsw@0
|
1819 return 1;
|
jbe/bsw@0
|
1820 }
|
jbe/bsw@0
|
1821
|
jbe@23
|
1822 // registration information for functions of library:
|
jbe/bsw@0
|
1823 static const struct luaL_Reg mondelefant_module_functions[] = {
|
jbe/bsw@0
|
1824 {"connect", mondelefant_connect},
|
jbe/bsw@0
|
1825 {"set_class", mondelefant_set_class},
|
jbe/bsw@0
|
1826 {"new_class", mondelefant_new_class},
|
jbe/bsw@0
|
1827 {NULL, NULL}
|
jbe/bsw@0
|
1828 };
|
jbe/bsw@0
|
1829
|
jbe@23
|
1830 // registration information for meta-methods of database connections:
|
jbe/bsw@0
|
1831 static const struct luaL_Reg mondelefant_conn_mt_functions[] = {
|
jbe/bsw@0
|
1832 {"__gc", mondelefant_conn_free},
|
jbe/bsw@0
|
1833 {"__index", mondelefant_conn_index},
|
jbe/bsw@0
|
1834 {"__newindex", mondelefant_conn_newindex},
|
jbe/bsw@0
|
1835 {NULL, NULL}
|
jbe/bsw@0
|
1836 };
|
jbe/bsw@0
|
1837
|
jbe@23
|
1838 // registration information for methods of database connections:
|
jbe/bsw@0
|
1839 static const struct luaL_Reg mondelefant_conn_methods[] = {
|
jbe/bsw@0
|
1840 {"close", mondelefant_conn_close},
|
jbe/bsw@0
|
1841 {"is_ok", mondelefant_conn_is_ok},
|
jbe/bsw@0
|
1842 {"get_transaction_status", mondelefant_conn_get_transaction_status},
|
jbe@397
|
1843 {"try_wait", mondelefant_conn_try_wait},
|
jbe@393
|
1844 {"wait", mondelefant_conn_wait},
|
jbe/bsw@0
|
1845 {"create_list", mondelefant_conn_create_list},
|
jbe/bsw@0
|
1846 {"create_object", mondelefant_conn_create_object},
|
jbe/bsw@0
|
1847 {"quote_string", mondelefant_conn_quote_string},
|
jbe/bsw@0
|
1848 {"quote_binary", mondelefant_conn_quote_binary},
|
jbe/bsw@0
|
1849 {"assemble_command", mondelefant_conn_assemble_command},
|
jbe/bsw@0
|
1850 {"try_query", mondelefant_conn_try_query},
|
jbe/bsw@0
|
1851 {"query", mondelefant_conn_query},
|
jbe/bsw@0
|
1852 {NULL, NULL}
|
jbe/bsw@0
|
1853 };
|
jbe/bsw@0
|
1854
|
jbe@23
|
1855 // registration information for meta-methods of error objects:
|
jbe/bsw@0
|
1856 static const struct luaL_Reg mondelefant_errorobject_mt_functions[] = {
|
jbe/bsw@0
|
1857 {NULL, NULL}
|
jbe/bsw@0
|
1858 };
|
jbe/bsw@0
|
1859
|
jbe@23
|
1860 // registration information for methods of error objects:
|
jbe/bsw@0
|
1861 static const struct luaL_Reg mondelefant_errorobject_methods[] = {
|
jbe@397
|
1862 {"escalate", lua_error},
|
jbe/bsw@0
|
1863 {"is_kind_of", mondelefant_errorobject_is_kind_of},
|
jbe/bsw@0
|
1864 {NULL, NULL}
|
jbe/bsw@0
|
1865 };
|
jbe/bsw@0
|
1866
|
jbe@23
|
1867 // registration information for meta-methods of database result lists/objects:
|
jbe/bsw@0
|
1868 static const struct luaL_Reg mondelefant_result_mt_functions[] = {
|
jbe/bsw@0
|
1869 {"__index", mondelefant_result_index},
|
jbe/bsw@0
|
1870 {"__newindex", mondelefant_result_newindex},
|
jbe/bsw@0
|
1871 {NULL, NULL}
|
jbe/bsw@0
|
1872 };
|
jbe/bsw@0
|
1873
|
jbe@23
|
1874 // registration information for methods of database result lists/objects:
|
jbe/bsw@0
|
1875 static const struct luaL_Reg mondelefant_class_mt_functions[] = {
|
jbe/bsw@0
|
1876 {"__index", mondelefant_class_index},
|
jbe/bsw@0
|
1877 {NULL, NULL}
|
jbe/bsw@0
|
1878 };
|
jbe/bsw@0
|
1879
|
jbe@23
|
1880 // registration information for methods of classes (models):
|
jbe/bsw@0
|
1881 static const struct luaL_Reg mondelefant_class_methods[] = {
|
jbe/bsw@0
|
1882 {"get_reference", mondelefant_class_get_reference},
|
jbe/bsw@0
|
1883 {"iterate_over_references", mondelefant_class_iterate_over_references},
|
jbe/bsw@0
|
1884 {"get_foreign_key_reference_name",
|
jbe/bsw@0
|
1885 mondelefant_class_get_foreign_key_reference_name},
|
jbe/bsw@0
|
1886 {NULL, NULL}
|
jbe/bsw@0
|
1887 };
|
jbe/bsw@0
|
1888
|
jbe@23
|
1889 // registration information for methods of database result objects (not lists!):
|
jbe/bsw@0
|
1890 static const struct luaL_Reg mondelefant_object_methods[] = {
|
jbe/bsw@0
|
1891 {NULL, NULL}
|
jbe/bsw@0
|
1892 };
|
jbe/bsw@0
|
1893
|
jbe@23
|
1894 // registration information for methods of database result lists (not single objects!):
|
jbe/bsw@0
|
1895 static const struct luaL_Reg mondelefant_list_methods[] = {
|
jbe/bsw@0
|
1896 {NULL, NULL}
|
jbe/bsw@0
|
1897 };
|
jbe/bsw@0
|
1898
|
jbe@23
|
1899 // luaopen function to initialize/register library:
|
jbe/bsw@0
|
1900 int luaopen_mondelefant_native(lua_State *L) {
|
jbe/bsw@0
|
1901 lua_settop(L, 0);
|
jbe/bsw@0
|
1902 lua_newtable(L); // module at stack position 1
|
jbe@64
|
1903 luaL_setfuncs(L, mondelefant_module_functions, 0);
|
jbe/bsw@0
|
1904
|
jbe/bsw@0
|
1905 lua_pushvalue(L, 1); // 2
|
jbe/bsw@0
|
1906 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_MODULE_REGKEY);
|
jbe/bsw@0
|
1907
|
jbe/bsw@0
|
1908 lua_newtable(L); // 2
|
jbe/bsw@0
|
1909 // NOTE: only PostgreSQL is supported yet:
|
jbe@64
|
1910 luaL_setfuncs(L, mondelefant_conn_methods, 0);
|
jbe/bsw@0
|
1911 lua_setfield(L, 1, "postgresql_connection_prototype");
|
jbe/bsw@0
|
1912 lua_newtable(L); // 2
|
jbe/bsw@0
|
1913 lua_setfield(L, 1, "connection_prototype");
|
jbe/bsw@0
|
1914
|
jbe/bsw@0
|
1915 luaL_newmetatable(L, MONDELEFANT_CONN_MT_REGKEY); // 2
|
jbe@64
|
1916 luaL_setfuncs(L, mondelefant_conn_mt_functions, 0);
|
jbe/bsw@0
|
1917 lua_settop(L, 1);
|
jbe/bsw@0
|
1918 luaL_newmetatable(L, MONDELEFANT_RESULT_MT_REGKEY); // 2
|
jbe@64
|
1919 luaL_setfuncs(L, mondelefant_result_mt_functions, 0);
|
jbe/bsw@0
|
1920 lua_setfield(L, 1, "result_metatable");
|
jbe/bsw@0
|
1921 luaL_newmetatable(L, MONDELEFANT_CLASS_MT_REGKEY); // 2
|
jbe@64
|
1922 luaL_setfuncs(L, mondelefant_class_mt_functions, 0);
|
jbe/bsw@0
|
1923 lua_setfield(L, 1, "class_metatable");
|
jbe/bsw@0
|
1924
|
jbe/bsw@0
|
1925 lua_newtable(L); // 2
|
jbe@272
|
1926 luaL_setfuncs(L, mondelefant_class_methods, 0);
|
jbe/bsw@0
|
1927 lua_newtable(L); // 3
|
jbe@64
|
1928 luaL_setfuncs(L, mondelefant_object_methods, 0);
|
jbe/bsw@0
|
1929 lua_setfield(L, 2, "object");
|
jbe/bsw@0
|
1930 lua_newtable(L); // 3
|
jbe/bsw@0
|
1931 lua_setfield(L, 2, "object_get");
|
jbe/bsw@0
|
1932 lua_newtable(L); // 3
|
jbe/bsw@0
|
1933 lua_setfield(L, 2, "object_set");
|
jbe/bsw@0
|
1934 lua_newtable(L); // 3
|
jbe@64
|
1935 luaL_setfuncs(L, mondelefant_list_methods, 0);
|
jbe/bsw@0
|
1936 lua_setfield(L, 2, "list");
|
jbe/bsw@0
|
1937 lua_newtable(L); // 3
|
jbe/bsw@0
|
1938 lua_setfield(L, 2, "references");
|
jbe/bsw@0
|
1939 lua_newtable(L); // 3
|
jbe/bsw@0
|
1940 lua_setfield(L, 2, "foreign_keys");
|
jbe/bsw@0
|
1941 lua_pushvalue(L, 2); // 3
|
jbe/bsw@0
|
1942 lua_setfield(L, LUA_REGISTRYINDEX, MONDELEFANT_CLASS_PROTO_REGKEY);
|
jbe/bsw@0
|
1943 lua_setfield(L, 1, "class_prototype");
|
jbe/bsw@0
|
1944
|
jbe/bsw@0
|
1945 luaL_newmetatable(L, MONDELEFANT_ERROROBJECT_MT_REGKEY); // 2
|
jbe@64
|
1946 luaL_setfuncs(L, mondelefant_errorobject_mt_functions, 0);
|
jbe/bsw@0
|
1947 lua_newtable(L); // 3
|
jbe@64
|
1948 luaL_setfuncs(L, mondelefant_errorobject_methods, 0);
|
jbe/bsw@0
|
1949 lua_setfield(L, 2, "__index");
|
jbe/bsw@0
|
1950 lua_setfield(L, 1, "errorobject_metatable");
|
jbe/bsw@0
|
1951
|
jbe/bsw@0
|
1952 return 1;
|
jbe/bsw@0
|
1953 }
|