shithub: libtags

ref: 1848c04ac0e8c83bf21bc448e01caf0530f1bc19
dir: /tagspriv.h/

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "tags.h"

#define nil NULL
#define UTFmax 4
#define nelem(x) (int)(sizeof(x)/sizeof((x)[0]))

enum {
	Numgenre = 192,
};

extern const char *id3genres[Numgenre];

static inline uint32_t
beuint(const void *d_)
{
	const uint8_t *d = d_;
	return d[0]<<24 | d[1]<<16 | d[2]<<8 | d[3];
}

static inline uint32_t
leuint(const void *d_)
{
	const uint8_t *d = d_;
	return d[3]<<24 | d[2]<<16 | d[1]<<8 | d[0];
}

/*
 * Converts (to UTF-8) at most sz bytes of src and writes it to out buffer.
 * Returns the number of bytes converted.
 * You need sz*2+1 bytes for out buffer to be completely safe.
 */
int iso88591toutf8(uint8_t *out, int osz, const uint8_t *src, int sz);

/*
 * Converts (to UTF-8) at most sz bytes of src and writes it to out buffer.
 * Returns the number of bytes converted or < 0 in case of error.
 * You need sz*4+1 bytes for out buffer to be completely safe.
 * UTF-16 defaults to big endian if there is no BOM.
 */
int utf16to8(uint8_t *out, int osz, const uint8_t *src, int sz);

/*
 * Same as utf16to8, but CP437 to UTF-8.
 */
int cp437toutf8(uint8_t *o, int osz, const uint8_t *s, int sz);

/*
 * This one is common for both vorbis.c and flac.c
 * It maps a string k to tag type and executes the callback from ctx.
 * Returns 1 if callback was called, 0 otherwise.
 */
void cbvorbiscomment(Tagctx *ctx, char *k, char *v);

void tagscallcb(Tagctx *ctx, int type, const char *k, char *s, int offset, int size, Tagread f);

#define txtcb(ctx, type, k, s) tagscallcb(ctx, type, k, (char*)s, 0, 0, nil)

int tagflac(Tagctx *ctx);
int tagid3v1(Tagctx *ctx);
int tagid3v2(Tagctx *ctx);
int tagit(Tagctx *ctx);
int tagm4a(Tagctx *ctx);
int tagopus(Tagctx *ctx);
int tags3m(Tagctx *ctx);
int tagvorbis(Tagctx *ctx);
int tagwav(Tagctx *ctx);
int tagxm(Tagctx *ctx);
int tagmod(Tagctx *ctx);