src/sds.h

   1 /* SDSLib, A C dynamic strings library
   2  *
   3  * Copyright (c) 2006-2010, Salvatore Sanfilippo <antirez at gmail dot com>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   * Redistributions of source code must retain the above copyright notice,
  10  *     this list of conditions and the following disclaimer.
  11  *   * Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *   * Neither the name of Redis nor the names of its contributors may be used
  15  *     to endorse or promote products derived from this software without
  16  *     specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef __SDS_H
  32 #define __SDS_H
  33
  34 #define SDS_MAX_PREALLOC (1024*1024)
  35
  36 #include <sys/types.h>
  37 #include <stdarg.h>
  38
  39 typedef char *sds;
  40
  41 struct sdshdr {
  42     int len;
  43     int free;
  44     char buf[];
  45 };
  46
  47 static inline size_t sdslen(const sds s) {
  48     struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
  49     return sh->len;
  50 }
  51
  52 static inline size_t sdsavail(const sds s) {
  53     struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
  54     return sh->free;
  55 }
  56
  57 sds sdsnewlen(const void *init, size_t initlen);
  58 sds sdsnew(const char *init);
  59 sds sdsempty();
  60 size_t sdslen(const sds s);
  61 sds sdsdup(const sds s);
  62 void sdsfree(sds s);
  63 size_t sdsavail(sds s);
  64 sds sdsgrowzero(sds s, size_t len);
  65 sds sdscatlen(sds s, void *t, size_t len);
  66 sds sdscat(sds s, char *t);
  67 sds sdscatsds(sds s, sds t);
  68 sds sdscpylen(sds s, char *t, size_t len);
  69 sds sdscpy(sds s, char *t);
  70
  71 sds sdscatvprintf(sds s, const char *fmt, va_list ap);
  72 #ifdef __GNUC__
  73 sds sdscatprintf(sds s, const char *fmt, ...)
  74     __attribute__((format(printf, 2, 3)));
  75 #else
  76 sds sdscatprintf(sds s, const char *fmt, ...);
  77 #endif
  78
  79 sds sdstrim(sds s, const char *cset);
  80 sds sdsrange(sds s, int start, int end);
  81 void sdsupdatelen(sds s);
  82 void sdsclear(sds s);
  83 int sdscmp(sds s1, sds s2);
  84 sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count);
  85 void sdsfreesplitres(sds *tokens, int count);
  86 void sdstolower(sds s);
  87 void sdstoupper(sds s);
  88 sds sdsfromlonglong(long long value);
  89 sds sdscatrepr(sds s, char *p, size_t len);
  90 sds *sdssplitargs(char *line, int *argc);
  91 void sdssplitargs_free(sds *argv, int argc);
  92 sds sdsmapchars(sds s, char *from, char *to, size_t setlen);
  93
  94 /* Low level functions exposed to the user API */
  95 sds sdsMakeRoomFor(sds s, size_t addlen);
  96 void sdsIncrLen(sds s, int incr);
  97 sds sdsRemoveFreeSpace(sds s);
  98 size_t sdsAllocSize(sds s);
  99
 100 #endif