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php-src/ext/pdo/pdo_sql_parser.c

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/* Generated by re2c 0.9.3 on Sun Feb 6 01:46:44 2005 */
#line 1 "pdo_sql_parser.re"
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2004 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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: |
| http://www.php.net/license/3_0.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. |
+----------------------------------------------------------------------+
| Author: George Schlossnagle <george@omniti.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "php_pdo_driver.h"
#define PDO_PARSER_TEXT 1
#define PDO_PARSER_BIND 2
#define PDO_PARSER_BIND_POS 3
#define PDO_PARSER_EOI 4
#define RET(i) {s->cur = cursor; return i; }
#define YYCTYPE char
#define YYCURSOR cursor
#define YYLIMIT s->lim
#define YYMARKER s->ptr
#define YYFILL(n)
typedef struct Scanner {
char *lim, *ptr, *cur, *tok;
} Scanner;
static int scan(Scanner *s)
{
char *cursor = s->cur;
std:
s->tok = cursor;
#line 54 "pdo_sql_parser.re"
#line 7 "<stdout>"
{
YYCTYPE yych;
unsigned int yyaccept;
static unsigned char yybm[] = {
0, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 0, 168, 168, 168, 168, 192,
168, 168, 168, 168, 168, 168, 168, 168,
184, 184, 184, 184, 184, 184, 184, 184,
184, 184, 160, 168, 168, 168, 168, 160,
168, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 168, 8, 168, 168, 184,
168, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 184, 184, 184, 184, 184,
184, 184, 184, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
168, 168, 168, 168, 168, 168, 168, 168,
};
goto yy0;
yy1: ++YYCURSOR;
yy0:
if((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
yych = *YYCURSOR;
if(yybm[0+yych] & 8) goto yy8;
if(yych <= '\000') goto yy11;
if(yych <= '&') goto yy2;
if(yych <= '\'') goto yy4;
if(yych <= '>') goto yy5;
goto yy6;
yy2: yyaccept = 0;
yych = *(YYMARKER = ++YYCURSOR);
if(yych >= '\001') goto yy24;
goto yy3;
yy3:
#line 61 "pdo_sql_parser.re"
{ RET(PDO_PARSER_TEXT); }
#line 63 "<stdout>"
yy4: yyaccept = 0;
yych = *(YYMARKER = ++YYCURSOR);
if(yych <= '\000') goto yy3;
if(yych == '"') goto yy3;
goto yy17;
yy5: yych = *++YYCURSOR;
if(yybm[0+yych] & 16) goto yy13;
goto yy3;
yy6: ++YYCURSOR;
goto yy7;
yy7:
#line 60 "pdo_sql_parser.re"
{ RET(PDO_PARSER_BIND_POS); }
#line 77 "<stdout>"
yy8: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
goto yy9;
yy9: if(yybm[0+yych] & 8) goto yy8;
goto yy10;
yy10:
#line 62 "pdo_sql_parser.re"
{ RET(PDO_PARSER_TEXT); }
#line 88 "<stdout>"
yy11: ++YYCURSOR;
goto yy12;
yy12:
#line 63 "pdo_sql_parser.re"
{ RET(PDO_PARSER_EOI); }
#line 94 "<stdout>"
yy13: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
goto yy14;
yy14: if(yybm[0+yych] & 16) goto yy13;
goto yy15;
yy15:
#line 59 "pdo_sql_parser.re"
{ RET(PDO_PARSER_BIND); }
#line 105 "<stdout>"
yy16: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
goto yy17;
yy17: if(yybm[0+yych] & 32) goto yy16;
if(yych <= '&') goto yy18;
if(yych <= '\'') goto yy19;
goto yy22;
yy18: YYCURSOR = YYMARKER;
switch(yyaccept){
case 1: goto yy21;
case 0: goto yy3;
}
yy19: yyaccept = 1;
YYMARKER = ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
goto yy20;
yy20: if(yybm[0+yych] & 32) goto yy16;
if(yych <= '&') goto yy21;
if(yych <= '\'') goto yy19;
goto yy22;
yy21:
#line 58 "pdo_sql_parser.re"
{ RET(PDO_PARSER_TEXT); }
#line 132 "<stdout>"
yy22: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
if(yych == '\'') goto yy16;
goto yy18;
yy23: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
goto yy24;
yy24: if(yybm[0+yych] & 128) goto yy23;
if(yych <= '\000') goto yy18;
if(yych <= '[') goto yy26;
goto yy25;
yy25: ++YYCURSOR;
if(YYLIMIT == YYCURSOR) YYFILL(1);
yych = *YYCURSOR;
if(yych == '"') goto yy23;
goto yy18;
yy26: ++YYCURSOR;
goto yy27;
yy27:
#line 57 "pdo_sql_parser.re"
{ RET(PDO_PARSER_TEXT); }
#line 159 "<stdout>"
}
#line 64 "pdo_sql_parser.re"
}
struct placeholder {
char *pos;
int len;
int bindno;
int qlen; /* quoted length of value */
char *quoted; /* quoted value */
int freeq;
struct placeholder *next;
};
PDO_API int pdo_parse_params(pdo_stmt_t *stmt, char *inquery, int inquery_len,
char **outquery, int *outquery_len TSRMLS_DC)
{
Scanner s;
char *ptr, *newbuffer;
int t;
int bindno = 0;
int ret = 0;
int newbuffer_len;
int padding;
HashTable *params;
struct pdo_bound_param_data *param;
int query_type = PDO_PLACEHOLDER_NONE;
struct placeholder *placeholders = NULL, *placetail = NULL, *plc = NULL;
ptr = *outquery;
s.cur = inquery;
s.lim = inquery + inquery_len;
/* phase 1: look for args */
while((t = scan(&s)) != PDO_PARSER_EOI) {
if (t == PDO_PARSER_BIND || t == PDO_PARSER_BIND_POS) {
if (t == PDO_PARSER_BIND) {
query_type |= PDO_PLACEHOLDER_NAMED;
} else {
query_type |= PDO_PLACEHOLDER_POSITIONAL;
}
plc = emalloc(sizeof(*plc));
memset(plc, 0, sizeof(*plc));
plc->next = NULL;
plc->pos = s.tok;
plc->len = s.cur - s.tok;
plc->bindno = bindno++;
if (placetail) {
placetail->next = plc;
} else {
placeholders = plc;
}
placetail = plc;
}
}
if (bindno == 0) {
/* nothing to do; good! */
return 0;
}
/* did the query make sense to me? */
if (query_type == (PDO_PLACEHOLDER_NAMED|PDO_PLACEHOLDER_POSITIONAL)) {
/* they mixed both types; punt */
strcpy(stmt->error_code, "HY093"); /* invalid parameter number */
return -1;
}
if (stmt->supports_placeholders == query_type) {
/* query matches native syntax */
ret = 0;
goto clean_up;
}
params = stmt->bound_params;
/* Do we have placeholders but no bound params */
if (bindno && !params) {
strcpy(stmt->error_code, "HY093"); /* invalid parameter number */
ret = -1;
goto clean_up;
}
/* what are we going to do ? */
if (stmt->supports_placeholders == PDO_PLACEHOLDER_NONE) {
/* query generation */
newbuffer_len = inquery_len;
/* let's quote all the values */
for (plc = placeholders; plc; plc = plc->next) {
if (query_type == PDO_PLACEHOLDER_POSITIONAL) {
ret = zend_hash_index_find(params, plc->bindno, (void**) &param);
} else {
ret = zend_hash_find(params, plc->pos, plc->len, (void**) &param);
}
if (ret == FAILURE) {
/* parameter was not defined */
ret = -1;
strcpy(stmt->error_code, "HY093"); /* invalid parameter number */
goto clean_up;
}
if (stmt->dbh->methods->quoter) {
if (!stmt->dbh->methods->quoter(stmt->dbh, Z_STRVAL_P(param->parameter),
Z_STRLEN_P(param->parameter), &plc->quoted, &plc->qlen,
param->param_type TSRMLS_CC)) {
/* bork */
ret = -1;
strcpy(stmt->error_code, stmt->dbh->error_code);
goto clean_up;
}
plc->freeq = 1;
} else {
plc->quoted = Z_STRVAL_P(param->parameter);
plc->qlen = Z_STRLEN_P(param->parameter);
}
newbuffer_len += plc->qlen;
}
rewrite:
/* allocate output buffer */
newbuffer = emalloc(newbuffer_len + 1);
*outquery = newbuffer;
/* and build the query */
plc = placeholders;
ptr = inquery;
do {
t = plc->pos - ptr;
if (t) {
memcpy(newbuffer, ptr, t);
newbuffer += t;
}
memcpy(newbuffer, plc->quoted, plc->qlen);
newbuffer += plc->qlen;
ptr = plc->pos + plc->len;
plc = plc->next;
} while (plc);
t = (inquery + inquery_len) - ptr;
if (t) {
memcpy(newbuffer, ptr, t);
newbuffer += t;
}
*newbuffer = '\0';
*outquery_len = newbuffer - *outquery;
ret = 1;
goto clean_up;
} else if (query_type == PDO_PLACEHOLDER_POSITIONAL) {
/* rewrite ? to :pdoX */
char idxbuf[32];
newbuffer_len = inquery_len;
for (plc = placeholders; plc; plc = plc->next) {
snprintf(idxbuf, sizeof(idxbuf), ":pdo%d", plc->bindno);
plc->quoted = estrdup(idxbuf);
plc->qlen = strlen(plc->quoted);
plc->freeq = 1;
newbuffer_len += plc->qlen;
}
goto rewrite;
} else {
/* rewrite :name to ? */
/* HARD!. We need to remember the mapping and bind those positions. */
strcpy(stmt->error_code, "IM001"); /* Driver does not support this function */
ret = -1;
}
clean_up:
while (placeholders) {
plc = placeholders;
placeholders = plc->next;
if (plc->freeq) {
efree(plc->quoted);
}
efree(plc);
}
return ret;
}
#if 0
int old_pdo_parse_params(pdo_stmt_t *stmt, char *inquery, int inquery_len, char **outquery,
int *outquery_len TSRMLS_DC)
{
Scanner s;
char *ptr;
int t;
int bindno = 0;
int newbuffer_len;
int padding;
HashTable *params = stmt->bound_params;
struct pdo_bound_param_data *param;
/* allocate buffer for query with expanded binds, ptr is our writing pointer */
newbuffer_len = inquery_len;
/* calculate the possible padding factor due to quoting */
if(stmt->dbh->max_escaped_char_length) {
padding = stmt->dbh->max_escaped_char_length;
} else {
padding = 3;
}
if(params) {
zend_hash_internal_pointer_reset(params);
while (SUCCESS == zend_hash_get_current_data(params, (void**)&param)) {
if(param->parameter) {
convert_to_string(param->parameter);
/* accomodate a string that needs to be fully quoted
bind placeholders are at least 2 characters, so
the accomodate their own "'s
*/
newbuffer_len += padding * Z_STRLEN_P(param->parameter);
}
zend_hash_move_forward(params);
}
}
*outquery = (char *) emalloc(newbuffer_len + 1);
*outquery_len = 0;
ptr = *outquery;
s.cur = inquery;
s.lim = inquery + inquery_len;
while((t = scan(&s)) != PDO_PARSER_EOI) {
if(t == PDO_PARSER_TEXT) {
memcpy(ptr, s.tok, s.cur - s.tok);
ptr += (s.cur - s.tok);
*outquery_len += (s.cur - s.tok);
}
else if(t == PDO_PARSER_BIND) {
if(!params) {
/* error */
efree(*outquery);
*outquery = NULL;
return (int) (s.cur - inquery);
}
/* lookup bind first via hash and then index */
/* stupid keys need to be null-terminated, even though we know their length */
if((SUCCESS == zend_hash_find(params, s.tok, s.cur-s.tok,(void **)&param))
||
(SUCCESS == zend_hash_index_find(params, bindno, (void **)&param)))
{
char *quotedstr;
int quotedstrlen;
/* restore the in-string key, doesn't need null-termination here */
/* currently everything is a string here */
/* quote the bind value if necessary */
if(stmt->dbh->methods->quoter(stmt->dbh, Z_STRVAL_P(param->parameter),
Z_STRLEN_P(param->parameter), &quotedstr, &quotedstrlen TSRMLS_CC))
{
memcpy(ptr, quotedstr, quotedstrlen);
ptr += quotedstrlen;
*outquery_len += quotedstrlen;
efree(quotedstr);
} else {
memcpy(ptr, Z_STRVAL_P(param->parameter), Z_STRLEN_P(param->parameter));
ptr += Z_STRLEN_P(param->parameter);
*outquery_len += (Z_STRLEN_P(param->parameter));
}
}
else {
/* error and cleanup */
efree(*outquery);
*outquery = NULL;
return (int) (s.cur - inquery);
}
bindno++;
}
else if(t == PDO_PARSER_BIND_POS) {
if(!params) {
/* error */
efree(*outquery);
*outquery = NULL;
return (int) (s.cur - inquery);
}
/* lookup bind by index */
if(SUCCESS == zend_hash_index_find(params, bindno, (void **)&param))
{
char *quotedstr;
int quotedstrlen;
/* currently everything is a string here */
/* quote the bind value if necessary */
if(stmt->dbh->methods->quoter(stmt->dbh, Z_STRVAL_P(param->parameter),
Z_STRLEN_P(param->parameter), &quotedstr, &quotedstrlen TSRMLS_CC))
{
memcpy(ptr, quotedstr, quotedstrlen);
ptr += quotedstrlen;
*outquery_len += quotedstrlen;
efree(quotedstr);
} else {
memcpy(ptr, Z_STRVAL_P(param->parameter), Z_STRLEN_P(param->parameter));
ptr += Z_STRLEN_P(param->parameter);
*outquery_len += (Z_STRLEN_P(param->parameter));
}
}
else {
/* error and cleanup */
efree(*outquery);
*outquery = NULL;
return (int) (s.cur - inquery);
}
bindno++;
}
}
*ptr = '\0';
return 0;
}
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker ft=c
* vim<600: noet sw=4 ts=4
*/
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