164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
/*
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* Copyright (c) 2013 Hugh Bailey <obs.jim@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#pragma once
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#include "c99defs.h"
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/*
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* General programmable serialization functions. (A shared interface to
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* various reading/writing to/from different inputs/outputs)
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum serialize_seek_type {
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SERIALIZE_SEEK_START,
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SERIALIZE_SEEK_CURRENT,
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SERIALIZE_SEEK_END
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};
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struct serializer {
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void *data;
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size_t (*read)(void *, void *, size_t);
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size_t (*write)(void *, const void *, size_t);
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int64_t (*seek)(void *, int64_t, enum serialize_seek_type);
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int64_t (*get_pos)(void *);
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};
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static inline size_t s_read(struct serializer *s, void *data, size_t size)
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{
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if (s && s->read && data && size)
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return s->read(s->data, (void*)data, size);
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return 0;
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}
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static inline size_t s_write(struct serializer *s, const void *data,
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size_t size)
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{
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if (s && s->write && data && size)
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return s->write(s->data, (void*)data, size);
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return 0;
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}
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static inline size_t serialize(struct serializer *s, void *data, size_t len)
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{
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if (s) {
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if (s->write)
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return s->write(s->data, data, len);
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else if (s->read)
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return s->read(s->data, data, len);
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}
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return 0;
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}
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static inline int64_t serializer_seek(struct serializer *s, int64_t offset,
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enum serialize_seek_type seek_type)
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{
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if (s && s->seek)
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return s->seek(s->data, offset, seek_type);
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return -1;
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}
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static inline int64_t serializer_get_pos(struct serializer *s)
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{
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if (s && s->get_pos)
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return s->get_pos(s->data);
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return -1;
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}
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/* formatted this to be similar to the AVIO layout that ffmpeg uses */
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static inline void s_w8(struct serializer *s, uint8_t u8)
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{
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s_write(s, &u8, sizeof(uint8_t));
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}
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static inline void s_wl16(struct serializer *s, uint16_t u16)
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{
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s_w8(s, (uint8_t)u16);
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s_w8(s, u16 >> 8);
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}
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static inline void s_wl24(struct serializer *s, uint32_t u24)
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{
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s_w8 (s, (uint8_t)u24);
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s_wl16(s, (uint16_t)(u24 >> 8));
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}
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static inline void s_wl32(struct serializer *s, uint32_t u32)
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{
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s_wl16(s, (uint16_t)u32);
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s_wl16(s, (uint16_t)(u32 >> 16));
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}
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static inline void s_wl64(struct serializer *s, uint64_t u64)
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{
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s_wl32(s, (uint32_t)u64);
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s_wl32(s, (uint32_t)(u64 >> 32));
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}
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static inline void s_wlf(struct serializer *s, float f)
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{
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s_wl32(s, *(uint32_t*)&f);
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}
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static inline void s_wld(struct serializer *s, double d)
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{
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s_wl64(s, *(uint64_t*)&d);
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}
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static inline void s_wb16(struct serializer *s, uint16_t u16)
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{
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s_w8(s, u16 >> 8);
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s_w8(s, (uint8_t)u16);
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}
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static inline void s_wb24(struct serializer *s, uint32_t u24)
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{
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s_wb16(s, (uint16_t)(u24 >> 8));
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s_w8 (s, (uint8_t)u24);
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}
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static inline void s_wb32(struct serializer *s, uint32_t u32)
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{
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s_wb16(s, (uint16_t)(u32 >> 16));
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s_wb16(s, (uint16_t)u32);
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}
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static inline void s_wb64(struct serializer *s, uint64_t u64)
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{
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s_wb32(s, (uint32_t)(u64 >> 32));
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s_wb32(s, (uint32_t)u64);
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}
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static inline void s_wbf(struct serializer *s, float f)
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{
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s_wb32(s, *(uint32_t*)&f);
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}
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static inline void s_wbd(struct serializer *s, double d)
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{
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s_wb64(s, *(uint64_t*)&d);
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}
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#ifdef __cplusplus
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}
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#endif
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