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/*
+----------------------------------------------------------------------+
| See COPYING file for further copyright information |
+----------------------------------------------------------------------+
| Author: Oleg Grenrus <oleg.grenrus@dynamoid.com> |
| See CREDITS for contributors |
+----------------------------------------------------------------------+
*/
#ifndef IGBINARY_H
#define IGBINARY_H
#include <stdint.h>
/* Forward declarations. */
struct zval;
/* Constants and constant macros */
/** Binary protocol version of igbinary. */
#define IGBINARY_FORMAT_VERSION 0x00000002
#define PHP_IGBINARY_VERSION "3.2.15"
/* Macros */
#ifdef PHP_WIN32
# if defined(IGBINARY_EXPORTS) || (!defined(COMPILE_DL_IGBINARY))
# define IGBINARY_API __declspec(dllexport)
# elif defined(COMPILE_DL_IGBINARY)
# define IGBINARY_API __declspec(dllimport)
# else
# define IGBINARY_API /* nothing special */
# endif
#elif defined(__GNUC__) && __GNUC__ >= 4
# define IGBINARY_API __attribute__ ((visibility("default")))
#else
# define IGBINARY_API /* nothing special */
#endif
/** Struct that contains pointers to memory allocation and deallocation functions.
* @see igbinary_serialize_data
*/
struct igbinary_memory_manager {
void *(*alloc)(size_t size, void *context);
void *(*realloc)(void *ptr, size_t new_size, void *context);
void (*free)(void *ptr, void *context);
void *context;
};
/** Serialize zval.
* Return buffer is allocated by this function with emalloc.
* @param[out] ret Return buffer
* @param[out] ret_len Size of return buffer
* @param[in] z Variable to be serialized
* @return 0 on success, 1 elsewhere.
*/
IGBINARY_API int igbinary_serialize(uint8_t **ret, size_t *ret_len, zval *z);
/** Serialize zval.
* Return buffer is allocated by this function with emalloc.
* @param[out] ret Return buffer
* @param[out] ret_len Size of return buffer
* @param[in] z Variable to be serialized
* @param[in] memory_manager Pointer to the structure that contains memory allocation functions.
* @return 0 on success, 1 elsewhere.
*/
IGBINARY_API int igbinary_serialize_ex(uint8_t **ret, size_t *ret_len, zval *z, struct igbinary_memory_manager *memory_manager);
/** Unserialize to zval.
* @param[in] buf Buffer with serialized data.
* @param[in] buf_len Buffer length.
* @param[out] z Unserialized zval
* @return 0 on success, 1 elsewhere.
*/
IGBINARY_API int igbinary_unserialize(const uint8_t *buf, size_t buf_len, zval *z);
static zend_always_inline int _igbinary_has_valid_header(const uint8_t *buf, size_t buf_len) {
if (buf_len < 5) {
/* Must have 4 header bytes and at least one byte of data */
return 0;
}
/* Unserialize 32bit value the same way on big-endian and little-endian architectures.
* This compiles to a load+optional bswap when compiler optimizations are enabled. */
const uint32_t ret =
((uint32_t)(buf[0]) << 24) |
((uint32_t)(buf[1]) << 16) |
((uint32_t)(buf[2]) << 8) |
((uint32_t)(buf[3]));
return ret == 1 || ret == 2;
}
/** This is defined as a macro and a static C function
* to allow callers to use the macro from newer igbinary versions even with older igbinary installations. */
#define igbinary_has_valid_header(buf, buf_len) _igbinary_has_valid_header((buf), (buf_len))
#endif /* IGBINARY_H */
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