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override.c
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override.c
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/standard/php_string.h"
#include "php_verdep.h"
#include "php_override.h"
ZEND_FUNCTION(override_function);
ZEND_BEGIN_ARG_INFO_EX(arginfo_override_function, 0, 0, 3)
ZEND_ARG_INFO(0, name)
ZEND_ARG_INFO(0, args)
ZEND_ARG_INFO(0, code)
ZEND_ARG_INFO(0, origin)
ZEND_END_ARG_INFO()
static const zend_function_entry override_functions[] = {
ZEND_FE(override_function, arginfo_override_function)
ZEND_FE_END
};
ZEND_MINFO_FUNCTION(override)
{
php_info_print_table_start();
php_info_print_table_row(2, "Override support", "enabled");
php_info_print_table_row(2, "Extension Version", OVERRIDE_EXT_VERSION);
php_info_print_table_end();
}
zend_module_entry override_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
"override",
override_functions,
NULL,
NULL,
NULL,
NULL,
ZEND_MINFO(override),
#if ZEND_MODULE_API_NO >= 20010901
OVERRIDE_EXT_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};
#ifdef COMPILE_DL_OVERRIDE
ZEND_GET_MODULE(override)
#endif
#define OVERRIDE_FUNCTION_INSPECT 0
#define OVERRIDE_FUNCTION_REMOVE 1
#define OVERRIDE_FUNCTION_RENAME 2
static int
override_fetch_function(char *fname, long fname_len,
zend_function **pfe, int flag TSRMLS_DC)
{
zend_function *fe;
php_strtolower(fname, strlen(fname));
if (zend_hash_find(EG(function_table), fname, fname_len+1,
(void **)&fe) == FAILURE) {
zend_error(E_WARNING, "%s not found", fname);
return FAILURE;
}
if (fe->type != ZEND_USER_FUNCTION && fe->type != ZEND_INTERNAL_FUNCTION) {
zend_error(E_WARNING, "%s is not a user or internal function", fname);
return FAILURE;
}
if (pfe) {
*pfe = fe;
}
return SUCCESS;
}
ZEND_FUNCTION(override_function)
{
char *fname, *fargs, *fcode, *forigin = NULL;
long fname_len, fargs_len, fcode_len, forigin_len = 0;
char *eval_code, *eval;
zend_function *fe, func;
int retval, ftype = OVERRIDE_FUNCTION_INSPECT;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC,
"sss|s", &fname, &fname_len,
&fargs, &fargs_len, &fcode, &fcode_len,
&forigin, &forigin_len) == FAILURE) {
RETURN_FALSE;
}
if (forigin && forigin_len > 0) {
ftype = OVERRIDE_FUNCTION_RENAME;
}
if (override_fetch_function(fname, fname_len, &fe,
ftype TSRMLS_CC) != SUCCESS) {
RETURN_FALSE;
}
func = *fe;
if (fe->type == ZEND_USER_FUNCTION && ftype == OVERRIDE_FUNCTION_RENAME) {
function_add_ref(&func);
}
if (zend_hash_del(EG(function_table), fname, fname_len+1) == FAILURE) {
zend_error(E_WARNING, "Error removing reference to function name %s()",
fname);
zend_function_dtor(&func);
RETURN_FALSE;
}
if (ftype == OVERRIDE_FUNCTION_RENAME) {
if (func.type == ZEND_USER_FUNCTION) {
efree((char *)func.common.function_name);
func.common.function_name = estrndup(forigin, forigin_len);
}
if (zend_hash_add(EG(function_table), forigin, forigin_len+1,
&func, sizeof(zend_function), NULL) == FAILURE) {
zend_error(E_WARNING, "Unable to rename function %s()", forigin);
zend_function_dtor(fe);
RETURN_FALSE;
}
}
spprintf(&eval_code, 0, "function %s(%s){%s}", fname, fargs, fcode);
if (!eval_code) {
RETURN_FALSE;
}
eval = zend_make_compiled_string_description(
"runtime created function" TSRMLS_CC);
retval = zend_eval_string(eval_code, NULL, eval TSRMLS_CC);
efree(eval_code);
efree(eval);
if (retval == SUCCESS) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}