src/opr/fmt.h

   1 /*
   2  * Copyright 2014, Nathaniel Wesley Filardo.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to permit
   9  * persons to whom the Software is furnished to do so, subject to the
  10  * following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  18  * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef _OPR_FMT_H_
  25 #define _OPR_FMT_H_
  26
  27 typedef struct opr_fmt_ctx_priv_s opr_fmt_ctx_priv;
  28 typedef struct opr_fmt_ctx_s opr_fmt_ctx;
  29
  30 typedef int (*opr_fmtr)(opr_fmt_ctx *, char, va_list);
  31
  32 struct opr_fmt_ctx_s {
  33     opr_fmtr *fmtrs;         /* Byte-wise dispatch table; 256 entries */
  34     void *user;              /* User-controlled private data */
  35     void (*put)(opr_fmt_ctx *, char); /* Write a character to the buffer */
  36
  37     opr_fmt_ctx_priv *priv;  /* Private for internals of opr_fmt */
  38 };
  39
  40 int opr_fmt(opr_fmtr *fmtrs, void *user, char *out, int n, const char *fstr, ...);
  41
  42 #endif