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sqlite3.c
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2459 lines (2019 loc) · 66.3 KB
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Scott MacVicar <scottmac@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_sqlite3.h"
#include "php_sqlite3_structs.h"
#include "SAPI.h"
#include <sqlite3.h>
#include "zend_exceptions.h"
#include "sqlite3_arginfo.h"
ZEND_DECLARE_MODULE_GLOBALS(sqlite3)
static PHP_GINIT_FUNCTION(sqlite3);
static int php_sqlite3_authorizer(void *autharg, int action, const char *arg1, const char *arg2, const char *arg3, const char *arg4);
static void sqlite3_param_dtor(zval *data);
static int php_sqlite3_compare_stmt_free(php_sqlite3_stmt **stmt_obj_ptr, sqlite3_stmt *statement);
#define SQLITE3_CHECK_INITIALIZED(db_obj, member, class_name) \
if (!(db_obj) || !(member)) { \
zend_throw_error(NULL, "The " #class_name " object has not been correctly initialised or is already closed"); \
RETURN_THROWS(); \
}
#define SQLITE3_CHECK_INITIALIZED_FREE_TRAMPOLINE(db_obj, member, class_name, trampoline_fcc) \
if (!(db_obj) || !(member)) { \
zend_release_fcall_info_cache((trampoline_fcc)); \
zend_throw_error(NULL, "The " #class_name " object has not been correctly initialised or is already closed"); \
RETURN_THROWS(); \
}
#define SQLITE3_CHECK_INITIALIZED_STMT(member, class_name) \
if (!(member)) { \
zend_throw_error(NULL, "The " #class_name " object has not been correctly initialised or is already closed"); \
RETURN_THROWS(); \
}
/* {{{ PHP_INI */
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("sqlite3.extension_dir", NULL, PHP_INI_SYSTEM, OnUpdateString, extension_dir, zend_sqlite3_globals, sqlite3_globals)
#if SQLITE_VERSION_NUMBER >= 3026000
STD_PHP_INI_BOOLEAN("sqlite3.defensive", "1", PHP_INI_USER, OnUpdateBool, dbconfig_defensive, zend_sqlite3_globals, sqlite3_globals)
#endif
PHP_INI_END()
/* }}} */
/* Handlers */
static zend_object_handlers sqlite3_object_handlers;
static zend_object_handlers sqlite3_stmt_object_handlers;
static zend_object_handlers sqlite3_result_object_handlers;
/* Class entries */
static zend_class_entry *php_sqlite3_exception_ce;
static zend_class_entry *php_sqlite3_sc_entry;
static zend_class_entry *php_sqlite3_stmt_entry;
zend_class_entry *php_sqlite3_result_entry;
/* {{{ Error Handler */
static void php_sqlite3_error(php_sqlite3_db_object *db_obj, int errcode, const char *format, ...)
{
va_list arg;
char *message;
va_start(arg, format);
vspprintf(&message, 0, format, arg);
va_end(arg);
if (db_obj && db_obj->exception) {
zend_throw_exception(php_sqlite3_exception_ce, message, errcode);
} else {
php_error_docref(NULL, E_WARNING, "%s", message);
}
if (message) {
efree(message);
}
}
/* }}} */
/* {{{ Opens a SQLite 3 Database, if the build includes encryption then it will attempt to use the key. */
PHP_METHOD(SQLite3, open)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
char *filename, *encryption_key, *fullpath;
size_t filename_len, encryption_key_len = 0;
zend_long flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
int rc;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "p|ls", &filename, &filename_len, &flags, &encryption_key, &encryption_key_len)) {
RETURN_THROWS();
}
if (db_obj->initialised) {
zend_throw_exception(zend_ce_exception, "Already initialised DB Object", 0);
RETURN_THROWS();
}
if (filename_len != 0 && (filename_len != sizeof(":memory:")-1 ||
memcmp(filename, ":memory:", sizeof(":memory:")-1) != 0)) {
if (!(fullpath = expand_filepath(filename, NULL))) {
zend_throw_exception(zend_ce_exception, "Unable to expand filepath", 0);
RETURN_THROWS();
}
if (php_check_open_basedir(fullpath)) {
zend_throw_exception_ex(zend_ce_exception, 0, "open_basedir prohibits opening %s", fullpath);
efree(fullpath);
RETURN_THROWS();
}
} else {
/* filename equals "" or ":memory:" */
fullpath = filename;
}
rc = sqlite3_open_v2(fullpath, &(db_obj->db), flags, NULL);
if (rc != SQLITE_OK) {
zend_throw_exception_ex(zend_ce_exception, 0, "Unable to open database: %s",
#ifdef HAVE_SQLITE3_ERRSTR
db_obj->db ? sqlite3_errmsg(db_obj->db) : sqlite3_errstr(rc));
#else
db_obj->db ? sqlite3_errmsg(db_obj->db) : "");
#endif
sqlite3_close(db_obj->db);
if (fullpath != filename) {
efree(fullpath);
}
return;
}
#ifdef SQLITE_HAS_CODEC
if (encryption_key_len > 0) {
if (sqlite3_key(db_obj->db, encryption_key, encryption_key_len) != SQLITE_OK) {
zend_throw_exception_ex(zend_ce_exception, 0, "Unable to open database: %s", sqlite3_errmsg(db_obj->db));
sqlite3_close(db_obj->db);
RETURN_THROWS();
}
}
#endif
db_obj->initialised = true;
db_obj->authorizer_fcc = empty_fcall_info_cache;
sqlite3_set_authorizer(db_obj->db, php_sqlite3_authorizer, db_obj);
#if SQLITE_VERSION_NUMBER >= 3026000
if (SQLITE3G(dbconfig_defensive)) {
sqlite3_db_config(db_obj->db, SQLITE_DBCONFIG_DEFENSIVE, 1, NULL);
}
#endif
if (fullpath != filename) {
efree(fullpath);
}
}
/* }}} */
/* {{{ Close a SQLite 3 Database. */
PHP_METHOD(SQLite3, close)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
int errcode;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
if (db_obj->initialised) {
zend_llist_clean(&(db_obj->free_list));
if(db_obj->db) {
errcode = sqlite3_close(db_obj->db);
if (errcode != SQLITE_OK) {
php_sqlite3_error(db_obj, errcode, "Unable to close database: %s", sqlite3_errmsg(db_obj->db));
RETURN_FALSE;
}
}
db_obj->initialised = false;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ Executes a result-less query against a given database. */
PHP_METHOD(SQLite3, exec)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
int errcode;
zend_string *sql;
char *errtext = NULL;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "S", &sql)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
errcode = sqlite3_exec(db_obj->db, ZSTR_VAL(sql), NULL, NULL, &errtext);
if (errcode != SQLITE_OK) {
php_sqlite3_error(db_obj, errcode, "%s", errtext);
sqlite3_free(errtext);
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ Returns the SQLite3 Library version as a string constant and as a number. */
PHP_METHOD(SQLite3, version)
{
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
array_init(return_value);
add_assoc_string(return_value, "versionString", (char*)sqlite3_libversion());
add_assoc_long(return_value, "versionNumber", sqlite3_libversion_number());
return;
}
/* }}} */
/* {{{ Returns the rowid of the most recent INSERT into the database from the database connection. */
PHP_METHOD(SQLite3, lastInsertRowID)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
RETURN_LONG((zend_long) sqlite3_last_insert_rowid(db_obj->db));
}
/* }}} */
/* {{{ Returns the numeric result code of the most recent failed sqlite API call for the database connection. */
PHP_METHOD(SQLite3, lastErrorCode)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->db, SQLite3)
if (db_obj->initialised) {
RETURN_LONG(sqlite3_errcode(db_obj->db));
} else {
RETURN_LONG(0);
}
}
/* }}} */
/* {{{ Returns the numeric extended result code of the most recent failed sqlite API call for the database connection. */
PHP_METHOD(SQLite3, lastExtendedErrorCode)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->db, SQLite3)
if (db_obj->initialised) {
RETURN_LONG(sqlite3_extended_errcode(db_obj->db));
} else {
RETURN_LONG(0);
}
}
/* }}} */
/* {{{ Turns on or off the extended result codes feature of SQLite. */
PHP_METHOD(SQLite3, enableExtendedResultCodes)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
bool enable = 1;
db_obj = Z_SQLITE3_DB_P(object);
int ret;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|b", &enable) == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->db, SQLite3)
if (db_obj->initialised) {
ret = sqlite3_extended_result_codes(db_obj->db, enable ? 1 : 0);
if (ret == SQLITE_OK)
{
RETURN_TRUE;
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ Returns english text describing the most recent failed sqlite API call for the database connection. */
PHP_METHOD(SQLite3, lastErrorMsg)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->db, SQLite3)
if (db_obj->initialised) {
RETURN_STRING((char *)sqlite3_errmsg(db_obj->db));
} else {
RETURN_EMPTY_STRING();
}
}
/* }}} */
/* {{{ Sets a busy handler that will sleep until database is not locked or timeout is reached. Passing a value less than or equal to zero turns off all busy handlers. */
PHP_METHOD(SQLite3, busyTimeout)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
zend_long ms;
#ifdef SQLITE_ENABLE_API_ARMOR
int return_code;
#endif
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "l", &ms)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
#ifdef SQLITE_ENABLE_API_ARMOR
return_code = sqlite3_busy_timeout(db_obj->db, ms);
if (return_code != SQLITE_OK) {
php_sqlite3_error(db_obj, sqlite3_errcode(db_obj->db), "Unable to set busy timeout: %s", sqlite3_errmsg(db_obj->db));
RETURN_FALSE;
}
#else
php_ignore_value(sqlite3_busy_timeout(db_obj->db, ms));
#endif
RETURN_TRUE;
}
/* }}} */
#ifndef SQLITE_OMIT_LOAD_EXTENSION
/* {{{ Attempts to load an SQLite extension library. */
PHP_METHOD(SQLite3, loadExtension)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
char *extension, *lib_path, *extension_dir, *errtext = NULL;
char fullpath[MAXPATHLEN];
size_t extension_len, extension_dir_len;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "s", &extension, &extension_len)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
#ifdef ZTS
if ((strncmp(sapi_module.name, "cgi", 3) != 0) &&
(strcmp(sapi_module.name, "cli") != 0) &&
(strncmp(sapi_module.name, "embed", 5) != 0)
) { php_sqlite3_error(db_obj, 0, "Not supported in multithreaded Web servers");
RETURN_FALSE;
}
#endif
if (!SQLITE3G(extension_dir)) {
php_sqlite3_error(db_obj, 0, "SQLite Extensions are disabled");
RETURN_FALSE;
}
if (extension_len == 0) {
zend_argument_must_not_be_empty_error(1);
RETURN_THROWS();
}
extension_dir = SQLITE3G(extension_dir);
extension_dir_len = strlen(SQLITE3G(extension_dir));
if (IS_SLASH(extension_dir[extension_dir_len-1])) {
spprintf(&lib_path, 0, "%s%s", extension_dir, extension);
} else {
spprintf(&lib_path, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, extension);
}
if (!VCWD_REALPATH(lib_path, fullpath)) {
php_sqlite3_error(db_obj, 0, "Unable to load extension at '%s'", lib_path);
efree(lib_path);
RETURN_FALSE;
}
efree(lib_path);
if (strncmp(fullpath, extension_dir, extension_dir_len) != 0) {
php_sqlite3_error(db_obj, 0, "Unable to open extensions outside the defined directory");
RETURN_FALSE;
}
/* Extension loading should only be enabled for when we attempt to load */
sqlite3_enable_load_extension(db_obj->db, 1);
if (sqlite3_load_extension(db_obj->db, fullpath, 0, &errtext) != SQLITE_OK) {
php_sqlite3_error(db_obj, 0, "%s", errtext);
sqlite3_free(errtext);
sqlite3_enable_load_extension(db_obj->db, 0);
RETURN_FALSE;
}
sqlite3_enable_load_extension(db_obj->db, 0);
RETURN_TRUE;
}
/* }}} */
#endif
/* {{{ Returns the number of database rows that were changed (or inserted or deleted) by the most recent SQL statement. */
PHP_METHOD(SQLite3, changes)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters_none() == FAILURE) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
RETURN_LONG(sqlite3_changes(db_obj->db));
}
/* }}} */
/* {{{ Returns a string that has been properly escaped. */
PHP_METHOD(SQLite3, escapeString)
{
zend_string *sql;
char *ret;
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "S", &sql)) {
RETURN_THROWS();
}
if (ZSTR_LEN(sql)) {
ret = sqlite3_mprintf("%q", ZSTR_VAL(sql));
if (ret) {
RETVAL_STRING(ret);
sqlite3_free(ret);
}
} else {
RETURN_EMPTY_STRING();
}
}
/* }}} */
/* {{{ Returns a prepared SQL statement for execution. */
PHP_METHOD(SQLite3, prepare)
{
php_sqlite3_db_object *db_obj;
php_sqlite3_stmt *stmt_obj;
zval *object = ZEND_THIS;
zend_string *sql;
int errcode;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "S", &sql)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
if (!ZSTR_LEN(sql)) {
RETURN_FALSE;
}
object_init_ex(return_value, php_sqlite3_stmt_entry);
stmt_obj = Z_SQLITE3_STMT_P(return_value);
stmt_obj->db_obj = db_obj;
Z_ADDREF_P(object);
errcode = sqlite3_prepare_v2(db_obj->db, ZSTR_VAL(sql), ZSTR_LEN(sql), &(stmt_obj->stmt), NULL);
if (errcode != SQLITE_OK) {
php_sqlite3_error(db_obj, errcode, "Unable to prepare statement: %s", sqlite3_errmsg(db_obj->db));
zval_ptr_dtor(return_value);
RETURN_FALSE;
}
stmt_obj->initialised = true;
zend_llist_add_element(&(db_obj->free_list), &stmt_obj);
}
/* }}} */
/* {{{ Returns true or false, for queries that return data it will return a SQLite3Result object. */
PHP_METHOD(SQLite3, query)
{
php_sqlite3_db_object *db_obj;
php_sqlite3_result *result;
php_sqlite3_stmt *stmt_obj;
zval *object = ZEND_THIS;
zval stmt;
zend_string *sql;
char *errtext = NULL;
int return_code;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "S", &sql)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
if (!ZSTR_LEN(sql)) {
RETURN_FALSE;
}
/* If there was no return value then just execute the query */
if (!USED_RET()) {
int errcode;
errcode = sqlite3_exec(db_obj->db, ZSTR_VAL(sql), NULL, NULL, &errtext);
if (errcode != SQLITE_OK) {
php_sqlite3_error(db_obj, errcode, "%s", errtext);
sqlite3_free(errtext);
}
RETURN_FALSE;
}
object_init_ex(&stmt, php_sqlite3_stmt_entry);
stmt_obj = Z_SQLITE3_STMT_P(&stmt);
stmt_obj->db_obj = db_obj;
Z_ADDREF_P(object);
return_code = sqlite3_prepare_v2(db_obj->db, ZSTR_VAL(sql), ZSTR_LEN(sql), &(stmt_obj->stmt), NULL);
if (return_code != SQLITE_OK) {
php_sqlite3_error(db_obj, return_code, "Unable to prepare statement: %s", sqlite3_errmsg(db_obj->db));
zval_ptr_dtor(&stmt);
RETURN_FALSE;
}
stmt_obj->initialised = true;
object_init_ex(return_value, php_sqlite3_result_entry);
result = Z_SQLITE3_RESULT_P(return_value);
result->db_obj = db_obj;
result->stmt_obj = stmt_obj;
result->column_names = NULL;
result->column_count = -1;
return_code = sqlite3_step(result->stmt_obj->stmt);
switch (return_code) {
case SQLITE_ROW: /* Valid Row */
case SQLITE_DONE: /* Valid but no results */
{
zend_llist_add_element(&(db_obj->free_list), &stmt_obj);
sqlite3_reset(result->stmt_obj->stmt);
break;
}
default:
if (!EG(exception)) {
php_sqlite3_error(db_obj, sqlite3_errcode(db_obj->db), "Unable to execute statement: %s", sqlite3_errmsg(db_obj->db));
}
sqlite3_finalize(stmt_obj->stmt);
stmt_obj->initialised = false;
zval_ptr_dtor(return_value);
RETURN_FALSE;
}
}
/* }}} */
static void sqlite_value_to_zval(sqlite3_stmt *stmt, int column, zval *data) /* {{{ */
{
sqlite3_int64 val;
switch (sqlite3_column_type(stmt, column)) {
case SQLITE_INTEGER:
val = sqlite3_column_int64(stmt, column);
#if LONG_MAX <= 2147483647
if (val > ZEND_LONG_MAX || val < ZEND_LONG_MIN) {
ZVAL_STRINGL(data, (char *)sqlite3_column_text(stmt, column), sqlite3_column_bytes(stmt, column));
} else {
#endif
ZVAL_LONG(data, (zend_long) val);
#if LONG_MAX <= 2147483647
}
#endif
break;
case SQLITE_FLOAT:
ZVAL_DOUBLE(data, sqlite3_column_double(stmt, column));
break;
case SQLITE_NULL:
ZVAL_NULL(data);
break;
case SQLITE3_TEXT:
ZVAL_STRING(data, (char*)sqlite3_column_text(stmt, column));
break;
case SQLITE_BLOB:
default:
ZVAL_STRINGL(data, (char*)sqlite3_column_blob(stmt, column), sqlite3_column_bytes(stmt, column));
}
}
/* }}} */
/* {{{ Returns a string of the first column, or an array of the entire row. */
PHP_METHOD(SQLite3, querySingle)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
zend_string *sql;
char *errtext = NULL;
int return_code;
bool entire_row = 0;
sqlite3_stmt *stmt;
db_obj = Z_SQLITE3_DB_P(object);
if (FAILURE == zend_parse_parameters(ZEND_NUM_ARGS(), "S|b", &sql, &entire_row)) {
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED(db_obj, db_obj->initialised, SQLite3)
if (!ZSTR_LEN(sql)) {
RETURN_FALSE;
}
/* If there was no return value then just execute the query */
if (!USED_RET()) {
int errcode;
errcode = sqlite3_exec(db_obj->db, ZSTR_VAL(sql), NULL, NULL, &errtext);
if (errcode != SQLITE_OK) {
php_sqlite3_error(db_obj, errcode, "%s", errtext);
sqlite3_free(errtext);
}
RETURN_FALSE;
}
return_code = sqlite3_prepare_v2(db_obj->db, ZSTR_VAL(sql), ZSTR_LEN(sql), &stmt, NULL);
if (return_code != SQLITE_OK) {
php_sqlite3_error(db_obj, return_code, "Unable to prepare statement: %s", sqlite3_errmsg(db_obj->db));
RETURN_FALSE;
}
return_code = sqlite3_step(stmt);
switch (return_code) {
case SQLITE_ROW: /* Valid Row */
{
if (!entire_row) {
sqlite_value_to_zval(stmt, 0, return_value);
} else {
int i = 0;
array_init(return_value);
for (i = 0; i < sqlite3_data_count(stmt); i++) {
zval data;
sqlite_value_to_zval(stmt, i, &data);
add_assoc_zval(return_value, (char*)sqlite3_column_name(stmt, i), &data);
}
}
break;
}
case SQLITE_DONE: /* Valid but no results */
{
if (!entire_row) {
RETVAL_NULL();
} else {
RETVAL_EMPTY_ARRAY();
}
break;
}
default:
if (!EG(exception)) {
php_sqlite3_error(db_obj, sqlite3_errcode(db_obj->db), "Unable to execute statement: %s", sqlite3_errmsg(db_obj->db));
}
RETVAL_FALSE;
}
sqlite3_finalize(stmt);
}
/* }}} */
static int sqlite3_do_callback(zend_fcall_info_cache *fcc, uint32_t argc, sqlite3_value **argv, sqlite3_context *context, int is_agg) /* {{{ */
{
zval *zargs = NULL;
zval retval;
uint32_t i;
uint32_t fake_argc;
zend_result ret = SUCCESS;
php_sqlite3_agg_context *agg_context = NULL;
if (is_agg) {
is_agg = 2;
}
fake_argc = argc + is_agg;
/* build up the params */
if (fake_argc) {
zargs = (zval *)safe_emalloc(fake_argc, sizeof(zval), 0);
}
if (is_agg) {
/* summon the aggregation context */
agg_context = (php_sqlite3_agg_context *)sqlite3_aggregate_context(context, sizeof(php_sqlite3_agg_context));
if (Z_ISUNDEF(agg_context->zval_context)) {
ZVAL_NULL(&agg_context->zval_context);
}
ZVAL_COPY(&zargs[0], &agg_context->zval_context);
ZVAL_LONG(&zargs[1], agg_context->row_count);
}
for (i = 0; i < argc; i++) {
switch (sqlite3_value_type(argv[i])) {
case SQLITE_INTEGER:
#if ZEND_LONG_MAX > 2147483647
ZVAL_LONG(&zargs[i + is_agg], sqlite3_value_int64(argv[i]));
#else
ZVAL_LONG(&zargs[i + is_agg], sqlite3_value_int(argv[i]));
#endif
break;
case SQLITE_FLOAT:
ZVAL_DOUBLE(&zargs[i + is_agg], sqlite3_value_double(argv[i]));
break;
case SQLITE_NULL:
ZVAL_NULL(&zargs[i + is_agg]);
break;
case SQLITE_BLOB:
case SQLITE3_TEXT:
default:
ZVAL_STRINGL(&zargs[i + is_agg], (char*)sqlite3_value_text(argv[i]), sqlite3_value_bytes(argv[i]));
break;
}
}
zend_call_known_fcc(fcc, &retval, fake_argc, zargs, /* named_params */ NULL);
/* clean up the params */
if (is_agg) {
zval_ptr_dtor(&zargs[0]);
zval_ptr_dtor(&zargs[1]);
}
if (fake_argc) {
for (i = is_agg; i < argc + is_agg; i++) {
zval_ptr_dtor(&zargs[i]);
}
efree(zargs);
}
if (!is_agg || !argv) {
/* only set the sqlite return value if we are a scalar function,
* or if we are finalizing an aggregate */
if (!Z_ISUNDEF(retval)) {
switch (Z_TYPE(retval)) {
case IS_LONG:
#if ZEND_LONG_MAX > 2147483647
sqlite3_result_int64(context, Z_LVAL(retval));
#else
sqlite3_result_int(context, Z_LVAL(retval));
#endif
break;
case IS_NULL:
sqlite3_result_null(context);
break;
case IS_DOUBLE:
sqlite3_result_double(context, Z_DVAL(retval));
break;
default: {
zend_string *tmp;
zend_string *str = zval_try_get_tmp_string(&retval, &tmp);
if (UNEXPECTED(!str)) {
ret = FAILURE;
break;
}
sqlite3_result_text(context, ZSTR_VAL(str), ZSTR_LEN(str), SQLITE_TRANSIENT);
zend_tmp_string_release(tmp);
break;
}
}
} else {
sqlite3_result_error(context, "failed to invoke callback", 0);
}
if (agg_context && !Z_ISUNDEF(agg_context->zval_context)) {
zval_ptr_dtor(&agg_context->zval_context);
}
} else {
/* we're stepping in an aggregate; the return value goes into
* the context */
if (agg_context && !Z_ISUNDEF(agg_context->zval_context)) {
zval_ptr_dtor(&agg_context->zval_context);
}
ZVAL_COPY_VALUE(&agg_context->zval_context, &retval);
ZVAL_UNDEF(&retval);
}
if (!Z_ISUNDEF(retval)) {
zval_ptr_dtor(&retval);
}
return ret;
}
/* }}}*/
static void php_sqlite3_callback_func(sqlite3_context *context, int argc, sqlite3_value **argv) /* {{{ */
{
php_sqlite3_func *func = (php_sqlite3_func *)sqlite3_user_data(context);
sqlite3_do_callback(&func->func, argc, argv, context, 0);
}
/* }}}*/
static void php_sqlite3_callback_step(sqlite3_context *context, int argc, sqlite3_value **argv) /* {{{ */
{
php_sqlite3_func *func = (php_sqlite3_func *)sqlite3_user_data(context);
php_sqlite3_agg_context *agg_context = (php_sqlite3_agg_context *)sqlite3_aggregate_context(context, sizeof(php_sqlite3_agg_context));
agg_context->row_count++;
sqlite3_do_callback(&func->step, argc, argv, context, 1);
}
/* }}} */
static void php_sqlite3_callback_final(sqlite3_context *context) /* {{{ */
{
php_sqlite3_func *func = (php_sqlite3_func *)sqlite3_user_data(context);
php_sqlite3_agg_context *agg_context = (php_sqlite3_agg_context *)sqlite3_aggregate_context(context, sizeof(php_sqlite3_agg_context));
agg_context->row_count = 0;
sqlite3_do_callback(&func->fini, 0, NULL, context, 1);
}
/* }}} */
static int php_sqlite3_callback_compare(void *coll, int a_len, const void *a, int b_len, const void* b) /* {{{ */
{
php_sqlite3_collation *collation = (php_sqlite3_collation*)coll;
zval zargs[2];
zval retval;
int ret = 0;
// Exception occurred on previous callback. Don't attempt to call function.
if (EG(exception)) {
return 0;
}
ZVAL_STRINGL(&zargs[0], a, a_len);
ZVAL_STRINGL(&zargs[1], b, b_len);
zend_call_known_fcc(&collation->cmp_func, &retval, /* argc */ 2, zargs, /* named_params */ NULL);
zval_ptr_dtor(&zargs[0]);
zval_ptr_dtor(&zargs[1]);
if (EG(exception)) {
ret = 0;
} else if (Z_TYPE(retval) != IS_LONG){
//retval ought to contain a ZVAL_LONG by now
// (the result of a comparison, i.e. most likely -1, 0, or 1)
//I suppose we could accept any scalar return type, though.
php_sqlite3_error(NULL, 0, "An error occurred while invoking the compare callback (invalid return type). Collation behaviour is undefined.");
} else {
ret = Z_LVAL(retval);
}
zval_ptr_dtor(&retval);
return ret;
}
/* }}} */
/* {{{ Allows registration of a PHP function as a SQLite UDF that can be called within SQL statements. */
PHP_METHOD(SQLite3, createFunction)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
php_sqlite3_func *func;
zend_string *sql_func;
zend_fcall_info fci = empty_fcall_info;
zend_fcall_info_cache fcc = empty_fcall_info_cache;
zend_long sql_func_num_args = -1;
zend_long flags = 0;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters(ZEND_NUM_ARGS(), "SF|ll", &sql_func, &fci, &fcc, &sql_func_num_args, &flags) == FAILURE) {
zend_release_fcall_info_cache(&fcc);
RETURN_THROWS();
}
SQLITE3_CHECK_INITIALIZED_FREE_TRAMPOLINE(db_obj, db_obj->initialised, SQLite3, &fcc);
if (!ZSTR_LEN(sql_func)) {
/* TODO Add warning/ValueError that name cannot be empty? */
zend_release_fcall_info_cache(&fcc);
RETURN_FALSE;
}
func = (php_sqlite3_func *)ecalloc(1, sizeof(*func));
if (sqlite3_create_function(db_obj->db, ZSTR_VAL(sql_func), sql_func_num_args, flags | SQLITE_UTF8, func, php_sqlite3_callback_func, NULL, NULL) == SQLITE_OK) {
func->func_name = zend_string_copy(sql_func);
zend_fcc_dup(&func->func, &fcc);
func->argc = sql_func_num_args;
func->next = db_obj->funcs;
db_obj->funcs = func;
RETURN_TRUE;
}
efree(func);
zend_release_fcall_info_cache(&fcc);
RETURN_FALSE;
}
/* }}} */
/* {{{ Allows registration of a PHP function for use as an aggregate. */
PHP_METHOD(SQLite3, createAggregate)
{
php_sqlite3_db_object *db_obj;
zval *object = ZEND_THIS;
php_sqlite3_func *func;
zend_string *sql_func;
zend_fcall_info step_fci = empty_fcall_info;
zend_fcall_info_cache step_fcc = empty_fcall_info_cache;
zend_fcall_info fini_fci = empty_fcall_info;
zend_fcall_info_cache fini_fcc = empty_fcall_info_cache;
zend_long sql_func_num_args = -1;
db_obj = Z_SQLITE3_DB_P(object);
if (zend_parse_parameters(ZEND_NUM_ARGS(), "SFF|l", &sql_func, &step_fci, &step_fcc, &fini_fci, &fini_fcc, &sql_func_num_args) == FAILURE) {
goto error;
}
/* Cannot use SQLITE3_CHECK_INITIALIZED_FREE_TRAMPOLINE() as we have 2 FCCs */
if (!db_obj || !db_obj->initialised) {
zend_throw_error(NULL, "The SQLite3 object has not been correctly initialised or is already closed");
goto error;
}
if (!ZSTR_LEN(sql_func)) {
/* TODO Add warning/ValueError that name cannot be empty? */
goto error;
}