git.m6w6.name Git - m6w6/ext-pq/blob - src/php_pq_misc.c

   1 /*
   2     +--------------------------------------------------------------------+
   3     | PECL :: pq                                                         |
   4     +--------------------------------------------------------------------+
   5     | Redistribution and use in source and binary forms, with or without |
   6     | modification, are permitted provided that the conditions mentioned |
   7     | in the accompanying LICENSE file are met.                          |
   8     +--------------------------------------------------------------------+
   9     | Copyright (c) 2013, Michael Wallner <mike@php.net>                 |
  10     +--------------------------------------------------------------------+
  11 */
  12
  13 #ifdef HAVE_CONFIG_H
  14 #       include "config.h"
  15 #endif
  16
  17 #include <php.h>
  18 #include <ext/date/php_date.h>
  19 #include <ext/standard/php_string.h>
  20
  21 #include <Zend/zend_interfaces.h>
  22
  23 #include <libpq/libpq-fs.h>
  24
  25 #include "php_pq.h"
  26 #include "php_pqexc.h"
  27 #include "php_pq_misc.h"
  28 #include "php_pqconn_event.h"
  29 #undef PHP_PQ_TYPE
  30 #include "php_pq_type.h"
  31
  32
  33 /* clear result object associated with a result handle */
  34 void php_pqres_clear(PGresult *r) {
  35         php_pq_object_t *o = PQresultInstanceData(r, php_pqconn_event);
  36
  37         if (o) {
  38                 php_pq_object_delref(o);
  39         } else {
  40                 PQclear(r);
  41         }
  42 }
  43
  44 /* clear any asynchronous results */
  45 void php_pqconn_clear(PGconn *conn) {
  46         PGresult *r;
  47         php_pqconn_event_data_t *evdata = PQinstanceData(conn, php_pqconn_event);
  48
  49         while ((r = PQgetResult(conn))) {
  50                 php_pqres_clear(r);
  51         }
  52
  53         if (evdata && evdata->obj) {
  54                 if (php_pq_callback_is_enabled(&evdata->obj->intern->onevent)) {
  55                         if (php_pq_callback_is_locked(&evdata->obj->intern->onevent)) {
  56                                 php_pq_callback_disable(&evdata->obj->intern->onevent);
  57                         } else {
  58                                 php_pq_callback_dtor(&evdata->obj->intern->onevent);
  59                         }
  60                 }
  61         }
  62 }
  63
  64 /* safe wrappers to clear any asynchronous wrappers before querying synchronously */
  65 PGresult *php_pq_exec(PGconn *conn, const char *query) {
  66         php_pqconn_clear(conn);
  67         return PQexec(conn, query);
  68 }
  69 PGresult *php_pq_exec_params(PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const * paramValues, const int *paramLengths, const int *paramFormats, int resultFormat) {
  70         php_pqconn_clear(conn);
  71         return PQexecParams(conn, command, nParams, paramTypes, paramValues, paramLengths, paramFormats, resultFormat);
  72 }
  73 PGresult *php_pq_prepare(PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes) {
  74         php_pqconn_clear(conn);
  75         return PQprepare(conn, stmtName, query, nParams, paramTypes);
  76 }
  77 PGresult *php_pq_exec_prepared(PGconn *conn, const char *stmtName, int nParams, const char *const * paramValues, const int *paramLengths, const int *paramFormats, int resultFormat) {
  78         php_pqconn_clear(conn);
  79         return PQexecPrepared(conn, stmtName, nParams, paramValues, paramLengths, paramFormats, resultFormat);
  80 }
  81
  82 char *php_pq_rtrim(char *e)
  83 {
  84         size_t l = strlen(e);
  85
  86         while (l-- > 0 && e[l] == '\n') {
  87                 e[l] = '\0';
  88         }
  89         return e;
  90 }
  91
  92 const char *php_pq_strmode(long mode)
  93 {
  94         switch (mode & (INV_READ|INV_WRITE)) {
  95         case INV_READ|INV_WRITE:
  96                 return "rw";
  97         case INV_READ:
  98                 return "r";
  99         case INV_WRITE:
 100                 return "w";
 101         default:
 102                 return "-";
 103         }
 104 }
 105
 106 int php_pq_compare_index(const void *lptr, const void *rptr)
 107 {
 108         zend_ulong l = ((const Bucket *) lptr)->h;
 109         zend_ulong r = ((const Bucket *) rptr)->h;
 110
 111         if (l < r) {
 112                 return -1;
 113         }
 114         if (l > r) {
 115                 return 1;
 116         }
 117         return 0;
 118 }
 119
 120 void php_pq_hash_ptr_dtor(zval *p)
 121 {
 122         efree(Z_PTR_P(p));
 123 }
 124
 125 zend_class_entry *php_pqdt_class_entry;
 126
 127 ZEND_BEGIN_ARG_INFO_EX(ai_pqdt_to_string, 0, 0, 0)
 128 ZEND_END_ARG_INFO();
 129 static PHP_METHOD(pqdt, __toString)
 130 {
 131         zval rv, tmp;
 132
 133         ZVAL_NULL(&rv);
 134         zend_call_method_with_1_params(getThis(), php_pqdt_class_entry, NULL, "format", &rv,
 135                         zend_read_property(php_pqdt_class_entry, getThis(), ZEND_STRL("format"), 0, &tmp));
 136         RETVAL_ZVAL(&rv, 1, 1);
 137 }
 138
 139 ZEND_BEGIN_ARG_INFO_EX(ai_pqdt_create_from_format, 0, 0, 2)
 140         ZEND_ARG_INFO(0, format)
 141         ZEND_ARG_INFO(0, datetime)
 142         ZEND_ARG_INFO(0, timezone)
 143 ZEND_END_ARG_INFO();
 144 static PHP_METHOD(pqdt, createFromFormat)
 145 {
 146         zend_error_handling zeh;
 147         char *fmt_str, *dt_str;
 148         size_t fmt_len, dt_len;
 149         zval *ztz = NULL;
 150         ZEND_RESULT_CODE rv;
 151
 152         zend_replace_error_handling(EH_THROW, exce(EX_INVALID_ARGUMENT), &zeh);
 153         rv = zend_parse_parameters(ZEND_NUM_ARGS(), "ss|O", &fmt_str, &fmt_len, &dt_str, &dt_len, &ztz, php_date_get_timezone_ce());
 154         zend_restore_error_handling(&zeh);
 155
 156         if (SUCCESS == rv) {
 157                 php_pqdt_from_string(return_value, fmt_str, dt_str, dt_len, "Y-m-d H:i:s.uO", ztz);
 158         }
 159 }
 160
 161 static zend_function_entry php_pqdt_methods[] = {
 162         PHP_ME(pqdt, createFromFormat, ai_pqdt_create_from_format, ZEND_ACC_PUBLIC|ZEND_ACC_STATIC)
 163         PHP_ME(pqdt, __toString, ai_pqdt_to_string, ZEND_ACC_PUBLIC)
 164         PHP_MALIAS(pqdt, jsonSerialize, __toString, ai_pqdt_to_string, ZEND_ACC_PUBLIC)
 165         {0}
 166 };
 167
 168 zval *php_pqdt_from_string(zval *zv, char *input_fmt, char *dt_str, size_t dt_len, char *output_fmt, zval *ztimezone)
 169 {
 170         php_date_obj *dobj;
 171
 172         php_date_instantiate(php_pqdt_class_entry, zv);
 173         dobj = php_date_obj_from_obj(Z_OBJ_P(zv));
 174         if (!php_date_initialize(dobj, dt_str, dt_len, input_fmt, ztimezone, 1)) {
 175                 zval_dtor(zv);
 176                 ZVAL_NULL(zv);
 177         } else if (output_fmt) {
 178                 zend_update_property_string(php_pqdt_class_entry, zv, ZEND_STRL("format"), output_fmt);
 179         }
 180
 181         return zv;
 182 }
 183
 184 zend_string *php_pqdt_to_string(zval *zdt, const char *format)
 185 {
 186         zval rv;
 187
 188         ZVAL_NULL(&rv);
 189
 190         if (Z_OBJ_HT_P(zdt)->cast_object
 191         &&      SUCCESS == Z_OBJ_HT_P(zdt)->cast_object(zdt, &rv, IS_STRING)
 192         ) {
 193                 return Z_STR(rv);
 194         } else if (instanceof_function(Z_OBJCE_P(zdt), php_date_get_date_ce())) {
 195                 zval rv, zfmt;
 196
 197                 ZVAL_NULL(&rv);
 198                 ZVAL_STRING(&zfmt, format);
 199                 zend_call_method_with_1_params(zdt, Z_OBJCE_P(zdt), NULL, "format", &rv, &zfmt);
 200                 zval_ptr_dtor(&zfmt);
 201
 202                 if (Z_TYPE(rv) == IS_STRING) {
 203                         return Z_STR(rv);
 204                 }
 205                 zval_ptr_dtor(&rv);
 206         }
 207
 208         return NULL;
 209 }
 210
 211 zend_class_entry *php_pqconv_class_entry;
 212
 213 ZEND_BEGIN_ARG_INFO_EX(ai_pqconv_convert_types, 0, 0, 0)
 214 ZEND_END_ARG_INFO();
 215
 216 ZEND_BEGIN_ARG_INFO_EX(ai_pqconv_convert_from_string, 0, 0, 2)
 217         ZEND_ARG_INFO(0, data)
 218         ZEND_ARG_INFO(0, type)
 219 ZEND_END_ARG_INFO();
 220
 221 ZEND_BEGIN_ARG_INFO_EX(ai_pqconv_convert_to_string, 0, 0, 2)
 222         ZEND_ARG_INFO(0, data)
 223         ZEND_ARG_INFO(0, type)
 224 ZEND_END_ARG_INFO();
 225
 226 zend_function_entry php_pqconv_methods[] = {
 227         PHP_ABSTRACT_ME(pqconv, convertTypes, ai_pqconv_convert_types)
 228         PHP_ABSTRACT_ME(pqconv, convertFromString, ai_pqconv_convert_from_string)
 229         PHP_ABSTRACT_ME(pqconv, convertToString, ai_pqconv_convert_to_string)
 230         {0}
 231 };
 232
 233
 234 PHP_MINIT_FUNCTION(pq_misc)
 235 {
 236         zend_class_entry *json, ce = {0};
 237
 238         INIT_NS_CLASS_ENTRY(ce, "pq", "Converter", php_pqconv_methods);
 239         php_pqconv_class_entry = zend_register_internal_interface(&ce);
 240
 241         memset(&ce, 0, sizeof(ce));
 242         INIT_NS_CLASS_ENTRY(ce ,"pq", "DateTime", php_pqdt_methods);
 243         php_pqdt_class_entry = zend_register_internal_class_ex(&ce, php_date_get_date_ce());
 244
 245         zend_declare_property_stringl(php_pqdt_class_entry, ZEND_STRL("format"), ZEND_STRL("Y-m-d H:i:s.uO"), ZEND_ACC_PUBLIC);
 246
 247         /* stop reading this file right here! */
 248         if ((json = zend_hash_str_find_ptr(CG(class_table), ZEND_STRL("jsonserializable")))) {
 249                 zend_class_implements(php_pqdt_class_entry, 1, json);
 250         }
 251
 252         return SUCCESS;
 253 }
 254
 255 typedef struct _HashTableList {
 256         zval arr;
 257         struct _HashTableList *parent;
 258 } HashTableList;
 259
 260 typedef struct _ArrayParserState {
 261         const char *ptr, *end;
 262         HashTableList *list;
 263         php_pqres_t *res;
 264         Oid typ;
 265         unsigned quotes:1;
 266         unsigned escaped:1;
 267 } ArrayParserState;
 268
 269 static char caa(ArrayParserState *a, const char *any, unsigned advance)
 270 {
 271         const char *p = any;
 272
 273         do {
 274                 if (*p == *a->ptr) {
 275                         a->ptr += advance;
 276                         return *p;
 277                 }
 278         } while (*++p);
 279
 280         php_error_docref(NULL, E_WARNING, "Failed to parse array: expected one of '%s', got '%c'", any, *a->ptr); \
 281         return 0;
 282 }
 283
 284 static ZEND_RESULT_CODE add_element(ArrayParserState *a, const char *start)
 285 {
 286         zval zelem;
 287         zend_string *zstr = zend_string_init(start, a->ptr - start, 0);
 288
 289         if (a->quotes) {
 290                 php_stripslashes(zstr);
 291                 ZVAL_STR(&zelem, zstr);
 292         } else if (!zend_string_equals_literal(zstr, "NULL")) {
 293                 ZVAL_STR(&zelem, zstr);
 294         } else {
 295                 zend_string_release(zstr);
 296                 ZVAL_NULL(&zelem);
 297         }
 298
 299         if (!ZVAL_IS_NULL(&zelem)) {
 300                 php_pqres_typed_zval(a->res, a->typ, &zelem);
 301         }
 302
 303         add_next_index_zval(&a->list->arr, &zelem);
 304         return SUCCESS;
 305 }
 306
 307 static ZEND_RESULT_CODE parse_array(ArrayParserState *a);
 308
 309 static ZEND_RESULT_CODE parse_element(ArrayParserState *a, char delim)
 310 {
 311         const char *el;
 312
 313         switch (*a->ptr) {
 314         case '{':
 315                 return parse_array(a);
 316
 317         case '"':
 318                 a->quotes = 1;
 319                 ++a->ptr;
 320                 break;
 321         }
 322
 323         for (el = a->ptr; a->ptr < a->end; ++a->ptr) {
 324                 switch (*a->ptr) {
 325                 case '\\':
 326                         a->escaped = !a->escaped;
 327                         break;
 328
 329                 case '"':
 330                         if (a->escaped) {
 331                                 a->escaped = 0;
 332                         } else if (a->quotes) {
 333                                 if (SUCCESS != add_element(a, el)) {
 334                                         return FAILURE;
 335                                 }
 336                                 a->quotes = 0;
 337                                 ++a->ptr;
 338                                 return SUCCESS;
 339                         } else {
 340                                 php_error_docref(NULL, E_WARNING, "Failed to parse element, unexpected quote: '%.*s'", (int) (a->ptr - el), el);
 341                                 return FAILURE;
 342                         }
 343                         break;
 344
 345                 default:
 346                         if (delim != *a->ptr) {
 347                                 a->escaped = 0;
 348                                 break;
 349                         }
 350                         /* no break */
 351                 case '}':
 352                         if (!a->quotes) {
 353                                 return add_element(a, el);
 354                         }
 355                         break;
 356
 357                 }
 358         }
 359
 360         php_error_docref(NULL, E_WARNING, "Failed to parse element, reached end of input");
 361         return FAILURE;
 362 }
 363
 364 static ZEND_RESULT_CODE parse_elements(ArrayParserState *a)
 365 {
 366         char delims[] = {'}', PHP_PQ_DELIM_OF_ARRAY(a->typ), 0};
 367
 368         while (SUCCESS == parse_element(a, delims[1])) {
 369                 switch (caa(a, delims, 0)) {
 370                 case 0:
 371                         return FAILURE;
 372
 373                 case '}':
 374                         return SUCCESS;
 375
 376                 default:
 377                         if (!*++a->ptr) {
 378                                 php_error_docref(NULL, E_WARNING, "Failed to parse elements, reached end of input");
 379                                 return FAILURE;
 380                         }
 381                         break;
 382                 }
 383         }
 384
 385         return FAILURE;
 386 }
 387
 388 static ZEND_RESULT_CODE parse_array(ArrayParserState *a)
 389 {
 390         HashTableList *list;
 391
 392         if (!caa(a, "{", 1)) {
 393                 return FAILURE;
 394         }
 395
 396         list = ecalloc(1, sizeof(*list));
 397         array_init(&list->arr);
 398
 399         if (a->list) {
 400                 add_next_index_zval(&a->list->arr, &list->arr);
 401                 list->parent = a->list;
 402         }
 403         a->list = list;
 404
 405         if (SUCCESS != parse_elements(a)) {
 406                 return FAILURE;
 407         }
 408
 409         if (!caa(a, "}", 1)) {
 410                 return FAILURE;
 411         }
 412
 413         /* step one level back up */
 414         if (a->list->parent) {
 415                 HashTableList *l = a->list->parent;
 416
 417                 efree(a->list);
 418                 a->list = l;
 419         }
 420
 421         return SUCCESS;
 422 }
 423
 424 HashTable *php_pq_parse_array(php_pqres_t *res, const char *val_str, size_t val_len, Oid typ)
 425 {
 426         HashTable *ht = NULL;
 427         ArrayParserState a = {0};
 428
 429         a.typ = typ;
 430         a.ptr = val_str;
 431         a.end = val_str + val_len;
 432         a.res = res;
 433
 434         if (SUCCESS != parse_array(&a)) {
 435                 while (a.list) {
 436                         HashTableList *l = a.list->parent;
 437
 438                         zval_dtor(&a.list->arr);
 439                         efree(a.list);
 440                         a.list = l;
 441                 }
 442                 return ht;
 443         }
 444
 445         if (*a.ptr) {
 446                 php_error_docref(NULL, E_NOTICE, "Trailing input: '%s'", a.ptr);
 447         }
 448
 449         while (a.list) {
 450                 HashTableList *l = a.list->parent;
 451
 452                 ht = Z_ARRVAL(a.list->arr);
 453                 efree(a.list);
 454                 a.list = l;
 455         }
 456
 457         return ht;
 458 }
 459
 460
 461 /*
 462  * Local variables:
 463  * tab-width: 4
 464  * c-basic-offset: 4
 465  * End:
 466  * vim600: noet sw=4 ts=4 fdm=marker
 467  * vim<600: noet sw=4 ts=4
 468  */