quickjs/cutils.h

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/*
* C utilities
*
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* 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 <string.h>
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#include <inttypes.h>
#if defined(_MSC_VER)
#include <windows.h>
#include <winsock2.h>
#include <malloc.h>
#define alloca _alloca
#define ssize_t ptrdiff_t
#endif
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#if defined(__APPLE__)
#include <malloc/malloc.h>
#elif defined(__ANDROID__)
#include <dlmalloc.h>
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#elif defined(__linux__) || defined(__CYGWIN__)
#include <malloc.h>
#elif defined(__FreeBSD__)
#include <malloc_np.h>
#endif
#if defined(_MSC_VER) && !defined(__clang__)
# define likely(x) (x)
# define unlikely(x) (x)
# define force_inline __forceinline
# define no_inline __declspec(noinline)
# define __maybe_unused
# define __attribute__(x)
# define __attribute(x)
# include <intrin.h>
static void *__builtin_frame_address(unsigned int level) {
return (void *)((char*)_AddressOfReturnAddress() - sizeof(int *) - level * sizeof(int *));
}
#else
# 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))
#endif
// https://stackoverflow.com/a/6849629
#undef FORMAT_STRING
#if _MSC_VER >= 1400
# include <sal.h>
# if _MSC_VER > 1400
# define FORMAT_STRING(p) _Printf_format_string_ p
# else
# define FORMAT_STRING(p) __format_string p
# endif /* FORMAT_STRING */
#else
# define FORMAT_STRING(p) p
#endif /* _MSC_VER */
#if defined(_MSC_VER) && !defined(__clang__)
#include <math.h>
#define INF INFINITY
#define NEG_INF -INFINITY
#else
#define INF (1.0/0.0)
#define NEG_INF (-1.0/0.0)
#endif
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#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]))
#ifndef endof
#define endof(x) ((x) + countof(x))
#endif
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#endif
#ifndef container_of
/* return the pointer of type 'type *' containing 'ptr' as field 'member' */
#define container_of(ptr, type, member) ((type *)((uint8_t *)(ptr) - offsetof(type, member)))
#endif
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#if !defined(_MSC_VER) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define minimum_length(n) static n
#else
#define minimum_length(n) n
#endif
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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)
{
#if defined(_MSC_VER) && !defined(__clang__)
unsigned long index;
_BitScanReverse(&index, a);
return 31 - index;
#else
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return __builtin_clz(a);
#endif
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}
/* WARNING: undefined if a = 0 */
static inline int clz64(uint64_t a)
{
#if defined(_MSC_VER) && !defined(__clang__)
unsigned long index;
_BitScanReverse64(&index, a);
return 63 - index;
#else
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return __builtin_clzll(a);
#endif
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}
/* WARNING: undefined if a = 0 */
static inline int ctz32(unsigned int a)
{
#if defined(_MSC_VER) && !defined(__clang__)
unsigned long index;
_BitScanForward(&index, a);
return index;
#else
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return __builtin_ctz(a);
#endif
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}
/* WARNING: undefined if a = 0 */
static inline int ctz64(uint64_t a)
{
#if defined(_MSC_VER) && !defined(__clang__)
unsigned long index;
_BitScanForward64(&index, a);
return index;
#else
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return __builtin_ctzll(a);
#endif
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}
static inline uint64_t get_u64(const uint8_t *tab)
{
uint64_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline int64_t get_i64(const uint8_t *tab)
{
int64_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline void put_u64(uint8_t *tab, uint64_t val)
{
memcpy(tab, &val, sizeof(val));
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}
static inline uint32_t get_u32(const uint8_t *tab)
{
uint32_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline int32_t get_i32(const uint8_t *tab)
{
int32_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline void put_u32(uint8_t *tab, uint32_t val)
{
memcpy(tab, &val, sizeof(val));
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}
static inline uint32_t get_u16(const uint8_t *tab)
{
uint16_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline int32_t get_i16(const uint8_t *tab)
{
int16_t v;
memcpy(&v, tab, sizeof(v));
return v;
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}
static inline void put_u16(uint8_t *tab, uint16_t val)
{
memcpy(tab, &val, sizeof(val));
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}
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;
}
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#ifndef bswap16
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static inline uint16_t bswap16(uint16_t x)
{
return (x >> 8) | (x << 8);
}
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#endif
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#ifndef bswap32
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static inline uint32_t bswap32(uint32_t v)
{
return ((v & 0xff000000) >> 24) | ((v & 0x00ff0000) >> 8) |
((v & 0x0000ff00) << 8) | ((v & 0x000000ff) << 24);
}
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#endif
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#ifndef bswap64
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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)) |
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((v & ((uint64_t)0xff << (0 * 8))) << (7 * 8));
}
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#endif
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static inline void inplace_bswap16(uint8_t *tab) {
put_u16(tab, bswap16(get_u16(tab)));
}
static inline void inplace_bswap32(uint8_t *tab) {
put_u32(tab, bswap32(get_u32(tab)));
}
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/* 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 void *data, size_t len);
int dbuf_put(DynBuf *s, const void *data, size_t len);
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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,
FORMAT_STRING(const char *fmt), ...);
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void dbuf_free(DynBuf *s);
static inline BOOL dbuf_error(DynBuf *s) {
return s->error;
}
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static inline void dbuf_set_error(DynBuf *s)
{
s->error = TRUE;
}
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#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);
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static inline BOOL is_hi_surrogate(uint32_t c)
{
return 54 == (c >> 10); // 0xD800-0xDBFF
}
static inline BOOL is_lo_surrogate(uint32_t c)
{
return 55 == (c >> 10); // 0xDC00-0xDFFF
}
static inline uint32_t from_surrogate(uint32_t hi, uint32_t lo)
{
return 65536 + 1024 * (hi & 1023) + (lo & 1023);
}
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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);
int64_t js__gettimeofday_us(void);
uint64_t js__hrtime_ns(void);
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static inline size_t js__malloc_usable_size(const void *ptr)
{
#if defined(__APPLE__)
return malloc_size(ptr);
#elif defined(_WIN32)
return _msize((void *)ptr);
#elif defined(__ANDROID__)
return dlmalloc_usable_size((void *)ptr);
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#elif defined(__linux__) || defined(__FreeBSD__)
return malloc_usable_size((void *)ptr);
#else
return 0;
#endif
}
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#endif /* CUTILS_H */