Unofficial mirror of Fabrice Bellard's quickjs
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

297 lines
7.2 KiB

/*
* C utilities
*
* Copyright (c) 2017 Fabrice Bellard
* Copyright (c) 2018 Charlie Gordon
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef CUTILS_H
#define CUTILS_H
#include <stdlib.h>
#include <inttypes.h>
/* set if CPU is big endian */
#undef WORDS_BIGENDIAN
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#define force_inline inline __attribute__((always_inline))
#define no_inline __attribute__((noinline))
#define __maybe_unused __attribute__((unused))
#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)
#define stringify(s) tostring(s)
#define tostring(s) #s
#ifndef offsetof
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
#ifndef countof
#define countof(x) (sizeof(x) / sizeof((x)[0]))
#endif
typedef int BOOL;
#ifndef FALSE
enum {
FALSE = 0,
TRUE = 1,
};
#endif
void pstrcpy(char *buf, int buf_size, const char *str);
char *pstrcat(char *buf, int buf_size, const char *s);
int strstart(const char *str, const char *val, const char **ptr);
int has_suffix(const char *str, const char *suffix);
static inline int max_int(int a, int b)
{
if (a > b)
return a;
else
return b;
}
static inline int min_int(int a, int b)
{
if (a < b)
return a;
else
return b;
}
static inline uint32_t max_uint32(uint32_t a, uint32_t b)
{
if (a > b)
return a;
else
return b;
}
static inline uint32_t min_uint32(uint32_t a, uint32_t b)
{
if (a < b)
return a;
else
return b;
}
static inline int64_t max_int64(int64_t a, int64_t b)
{
if (a > b)
return a;
else
return b;
}
static inline int64_t min_int64(int64_t a, int64_t b)
{
if (a < b)
return a;
else
return b;
}
/* WARNING: undefined if a = 0 */
static inline int clz32(unsigned int a)
{
return __builtin_clz(a);
}
/* WARNING: undefined if a = 0 */
static inline int clz64(uint64_t a)
{
return __builtin_clzll(a);
}
/* WARNING: undefined if a = 0 */
static inline int ctz32(unsigned int a)
{
return __builtin_ctz(a);
}
/* WARNING: undefined if a = 0 */
static inline int ctz64(uint64_t a)
{
return __builtin_ctzll(a);
}
struct __attribute__((packed)) packed_u64 {
uint64_t v;
};
struct __attribute__((packed)) packed_u32 {
uint32_t v;
};
struct __attribute__((packed)) packed_u16 {
uint16_t v;
};
static inline uint64_t get_u64(const uint8_t *tab)
{
return ((const struct packed_u64 *)tab)->v;
}
static inline int64_t get_i64(const uint8_t *tab)
{
return (int64_t)((const struct packed_u64 *)tab)->v;
}
static inline void put_u64(uint8_t *tab, uint64_t val)
{
((struct packed_u64 *)tab)->v = val;
}
static inline uint32_t get_u32(const uint8_t *tab)
{
return ((const struct packed_u32 *)tab)->v;
}
static inline int32_t get_i32(const uint8_t *tab)
{
return (int32_t)((const struct packed_u32 *)tab)->v;
}
static inline void put_u32(uint8_t *tab, uint32_t val)
{
((struct packed_u32 *)tab)->v = val;
}
static inline uint32_t get_u16(const uint8_t *tab)
{
return ((const struct packed_u16 *)tab)->v;
}
static inline int32_t get_i16(const uint8_t *tab)
{
return (int16_t)((const struct packed_u16 *)tab)->v;
}
static inline void put_u16(uint8_t *tab, uint16_t val)
{
((struct packed_u16 *)tab)->v = val;
}
static inline uint32_t get_u8(const uint8_t *tab)
{
return *tab;
}
static inline int32_t get_i8(const uint8_t *tab)
{
return (int8_t)*tab;
}
static inline void put_u8(uint8_t *tab, uint8_t val)
{
*tab = val;
}
static inline uint16_t bswap16(uint16_t x)
{
return (x >> 8) | (x << 8);
}
static inline uint32_t bswap32(uint32_t v)
{
return ((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >> 8) |
((v & 0x0000ff00) << 8) | ((v & 0x000000ff) << 24);
}
static inline uint64_t bswap64(uint64_t v)
{
return ((v & ((uint64_t)0xff << (7 * 8))) >> (7 * 8)) |
((v & ((uint64_t)0xff << (6 * 8))) >> (5 * 8)) |
((v & ((uint64_t)0xff << (5 * 8))) >> (3 * 8)) |
((v & ((uint64_t)0xff << (4 * 8))) >> (1 * 8)) |
((v & ((uint64_t)0xff << (3 * 8))) << (1 * 8)) |
((v & ((uint64_t)0xff << (2 * 8))) << (3 * 8)) |
((v & ((uint64_t)0xff << (1 * 8))) << (5 * 8)) |
((v & ((uint64_t)0xff << (0 * 8))) << (7 * 8));
}
/* XXX: should take an extra argument to pass slack information to the caller */
typedef void *DynBufReallocFunc(void *opaque, void *ptr, size_t size);
typedef struct DynBuf {
uint8_t *buf;
size_t size;
size_t allocated_size;
BOOL error; /* true if a memory allocation error occurred */
DynBufReallocFunc *realloc_func;
void *opaque; /* for realloc_func */
} DynBuf;
void dbuf_init(DynBuf *s);
void dbuf_init2(DynBuf *s, void *opaque, DynBufReallocFunc *realloc_func);
int dbuf_realloc(DynBuf *s, size_t new_size);
int dbuf_write(DynBuf *s, size_t offset, const uint8_t *data, size_t len);
int dbuf_put(DynBuf *s, const uint8_t *data, size_t len);
int dbuf_put_self(DynBuf *s, size_t offset, size_t len);
int dbuf_putc(DynBuf *s, uint8_t c);
int dbuf_putstr(DynBuf *s, const char *str);
static inline int dbuf_put_u16(DynBuf *s, uint16_t val)
{
return dbuf_put(s, (uint8_t *)&val, 2);
}
static inline int dbuf_put_u32(DynBuf *s, uint32_t val)
{
return dbuf_put(s, (uint8_t *)&val, 4);
}
static inline int dbuf_put_u64(DynBuf *s, uint64_t val)
{
return dbuf_put(s, (uint8_t *)&val, 8);
}
int __attribute__((format(printf, 2, 3))) dbuf_printf(DynBuf *s,
const char *fmt, ...);
void dbuf_free(DynBuf *s);
static inline BOOL dbuf_error(DynBuf *s) {
return s->error;
}
static inline void dbuf_set_error(DynBuf *s)
{
s->error = TRUE;
}
#define UTF8_CHAR_LEN_MAX 6
int unicode_to_utf8(uint8_t *buf, unsigned int c);
int unicode_from_utf8(const uint8_t *p, int max_len, const uint8_t **pp);
static inline int from_hex(int c)
{
if (c >= '0' && c <= '9')
return c - '0';
else if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
else if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
else
return -1;
}
void rqsort(void *base, size_t nmemb, size_t size,
int (*cmp)(const void *, const void *, void *),
void *arg);
#endif /* CUTILS_H */