mdw@git.distorted.org.uk Git - mLib/blob - codec/url.h

   1 /* -*-c-*-
   2  *
   3  * Parsing and construction of url-encoded name/value pairs
   4  *
   5  * (c) 1999 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the mLib utilities library.
  11  *
  12  * mLib is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * mLib is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with mLib; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef MLIB_URL_H
  29 #define MLIB_URL_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #ifndef MLIB_DSTR_H
  38 #  include "dstr.h"
  39 #endif
  40
  41 /*----- Data structures ---------------------------------------------------*/
  42
  43 typedef struct url_ectx {
  44   unsigned f;
  45 } url_ectx;
  46
  47 typedef struct url_dctx {
  48   const char *p;
  49   unsigned f;
  50 } url_dctx;
  51
  52 #define URLF_SEP 1u
  53 #define URLF_STRICT 2u
  54 #define URLF_LAX 4u
  55 #define URLF_SEMI 8u
  56
  57 /*----- Functions provided ------------------------------------------------*/
  58
  59 /* --- @url_initenc@ --- *
  60  *
  61  * Arguments:   @url_ectx *ctx@ = pointer to context block
  62  *
  63  * Returns:     ---
  64  *
  65  * Use:         Initializes a URL encoding context.
  66  */
  67
  68 extern void url_initenc(url_ectx */*ctx*/);
  69
  70 /* --- @url_enc@ --- *
  71  *
  72  * Arguments:   @url_ectx *ctx@ = pointer to encoding context
  73  *              @dstr *d@ = pointer to output string
  74  *              @const char *name@ = pointer to name
  75  *              @const char *value@ = pointer to value
  76  *
  77  * Returns:     ---
  78  *
  79  * Use:         Writes an assignment between @name@ and @value@ to the
  80  *              output string, encoding the values properly.
  81  */
  82
  83 extern void url_enc(url_ectx */*ctx*/, dstr */*d*/,
  84                     const char */*name*/, const char */*value*/);
  85
  86 /* --- @url_initdec@ --- *
  87  *
  88  * Arguments:   @url_dctx *ctx@ = pointer to context block
  89  *              @const char *p@ = string to read data from
  90  *
  91  * Returns:     ---
  92  *
  93  * Use:         Initializes a URL decoding context.
  94  */
  95
  96 extern void url_initdec(url_dctx */*ctx*/, const char */*p*/);
  97
  98 /* --- @url_dec@ --- *
  99  *
 100  * Arguments:   @url_dctx *ctx@ = pointer to decode context
 101  *              @dstr *n@ = pointer to output string for name
 102  *              @dstr *v@ = pointer to output string for value
 103  *
 104  * Returns:     Nonzero if it read something, zero if there's nothing left
 105  *
 106  * Use:         Decodes the next name/value pair from a urlencoded string.
 107  */
 108
 109 extern int url_dec(url_dctx */*ctx*/, dstr */*n*/, dstr */*v*/);
 110
 111 /*----- That's all, folks -------------------------------------------------*/
 112
 113 #ifdef __cplusplus
 114   }
 115 #endif
 116
 117 #endif