mpv/bstr.h

/*
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef MPLAYER_BSTR_H
#define MPLAYER_BSTR_H

#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <stdbool.h>

#include "talloc.h"

/* NOTE: 'len' is size_t, but most string-handling functions below assume
 * that input size has been sanity checked and len fits in an int.
 */
struct bstr {
    unsigned char *start;
    size_t len;
};

int bstrcmp(struct bstr str1, struct bstr str2);
int bstrcasecmp(struct bstr str1, struct bstr str2);
int bstrchr(struct bstr str, int c);
int bstrrchr(struct bstr str, int c);
int bstr_find(struct bstr haystack, struct bstr needle);
struct bstr *bstr_splitlines(void *talloc_ctx, struct bstr str);
struct bstr bstr_strip(struct bstr str);
struct bstr bstr_split(struct bstr str, char *sep, struct bstr *rest);
struct bstr bstr_splice(struct bstr str, int start, int end);
long long bstrtoll(struct bstr str, struct bstr *rest, int base);
void bstr_lower(struct bstr str);

static inline struct bstr bstr_cut(struct bstr str, int n)
{
    return (struct bstr){str.start + n, str.len - n};
}

static inline bool bstr_startswith(struct bstr str, struct bstr prefix)
{
    if (str.len < prefix.len)
        return false;
    return !memcmp(str.start, prefix.start, prefix.len);
}

// demux_rtp.cpp (live555) C++ compilation workaround
#ifndef __cplusplus
static inline char *bstrdup0(void *talloc_ctx, struct bstr str)
{
    return talloc_strndup(talloc_ctx, (char *)str.start, str.len);
}

static inline struct bstr bstrdup(void *talloc_ctx, struct bstr str)
{
    struct bstr r = { talloc_strndup(talloc_ctx, str.start, str.len), str.len };
    return r;
}

static inline struct bstr BSTR(const unsigned char *s)
{
    return (struct bstr){(unsigned char *)s, s ? strlen(s) : 0};
}

#endif

// create a pair (not single value!) for "%.*s" printf syntax
#define BSTR_P(bstr) (int)((bstr).len), (bstr).start

#define WHITESPACE " \f\n\r\t\v"

#endif /* MPLAYER_BSTR_H */