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/*
* Copyright (C) Dmitry Volyntsev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NJS_UTILS_H_INCLUDED_
#define _NJS_UTILS_H_INCLUDED_
typedef union {
float f;
uint32_t u;
} njs_conv_f32_t;
typedef union {
double f;
uint64_t u;
} njs_conv_f64_t;
struct NJS_PACKED njs_packed_u16_t {
uint16_t v;
};
struct NJS_PACKED njs_packed_u32_t {
uint32_t v;
};
struct NJS_PACKED njs_packed_u64_t {
uint64_t v;
};
typedef int (*njs_sort_cmp_t)(const void *, const void *, void *ctx);
void njs_qsort(void *base, size_t n, size_t size, njs_sort_cmp_t cmp,
void *ctx);
const char *njs_errno_string(int errnum);
njs_inline void
njs_swap_u8(void *a, void *b, size_t size)
{
uint8_t u, *au, *bu;
au = (uint8_t *) a;
bu = (uint8_t *) b;
u = au[0];
au[0] = bu[0];
bu[0] = u;
}
njs_inline void
njs_swap_u16(void *a, void *b, size_t size)
{
uint16_t u, *au, *bu;
au = (uint16_t *) a;
bu = (uint16_t *) b;
u = au[0];
au[0] = bu[0];
bu[0] = u;
}
njs_inline void
njs_swap_u32(void *a, void *b, size_t size)
{
uint32_t u, *au, *bu;
au = (uint32_t *) a;
bu = (uint32_t *) b;
u = au[0];
au[0] = bu[0];
bu[0] = u;
}
njs_inline void
njs_swap_u64(void *a, void *b, size_t size)
{
uint64_t u, *au, *bu;
au = (uint64_t *) a;
bu = (uint64_t *) b;
u = au[0];
au[0] = bu[0];
bu[0] = u;
}
njs_inline uint16_t
njs_bswap_u16(uint16_t u16)
{
return (u16 >> 8)
| (u16 << 8);
}
njs_inline uint32_t
njs_bswap_u32(uint32_t u32)
{
return ((u32 & 0xff000000) >> 24)
| ((u32 & 0x00ff0000) >> 8)
| ((u32 & 0x0000ff00) << 8)
| ((u32 & 0x000000ff) << 24);
}
njs_inline uint64_t
njs_bswap_u64(uint64_t u64)
{
return ((u64 & 0xff00000000000000ULL) >> 56)
| ((u64 & 0x00ff000000000000ULL) >> 40)
| ((u64 & 0x0000ff0000000000ULL) >> 24)
| ((u64 & 0x000000ff00000000ULL) >> 8)
| ((u64 & 0x00000000ff000000ULL) << 8)
| ((u64 & 0x0000000000ff0000ULL) << 24)
| ((u64 & 0x000000000000ff00ULL) << 40)
| ((u64 & 0x00000000000000ffULL) << 56);
}
njs_inline uint16_t
njs_get_u16(const uint8_t *p)
{
return ((const struct njs_packed_u16_t *) p)->v;
}
njs_inline uint32_t
njs_get_u32(const uint8_t *p)
{
return ((const struct njs_packed_u32_t *) p)->v;
}
njs_inline uint64_t
njs_get_u64(const uint8_t *p)
{
return ((const struct njs_packed_u64_t *) p)->v;
}
njs_inline void
njs_set_u16(uint8_t *p, uint16_t val)
{
((struct njs_packed_u16_t *) p)->v = val;
}
njs_inline void
njs_set_u32(uint8_t *p, uint32_t val)
{
((struct njs_packed_u32_t *) p)->v = val;
}
njs_inline void
njs_set_u64(uint8_t *p, uint64_t val)
{
((struct njs_packed_u64_t *) p)->v = val;
}
#endif /* _NJS_UTILS_H_INCLUDED_ */
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