xml.c

   1 /* $Id: xml.c,v 1.23 2008/12/10 10:43:57 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the
   7  * above copyright notice and this permission notice appear in all
   8  * copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
  11  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  12  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
  13  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  14  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  15  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  16  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19 #include <assert.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "private.h"
  24 #include "ml.h"
  25
  26
  27 static  int             xml_alloc(void **);
  28 static  void            xml_free(void *);
  29 static  ssize_t         xml_endtag(struct md_mbuf *, void *,
  30                                 const struct md_args *,
  31                                 enum md_ns, int);
  32 static  ssize_t         xml_begintag(struct md_mbuf *, void *,
  33                                 const struct md_args *,
  34                                 enum md_ns, int,
  35                                 const int *, const char **);
  36 static  ssize_t         xml_beginstring(struct md_mbuf *,
  37                                 const struct md_args *,
  38                                 const char *, size_t);
  39 static  ssize_t         xml_endstring(struct md_mbuf *,
  40                                 const struct md_args *,
  41                                 const char *, size_t);
  42 static  int             xml_begin(struct md_mbuf *,
  43                                 const struct md_args *,
  44                                 const struct tm *,
  45                                 const char *, const char *,
  46                                 enum roffmsec, enum roffvol);
  47 static  int             xml_end(struct md_mbuf *,
  48                                 const struct md_args *);
  49 static  ssize_t         xml_printtagname(struct md_mbuf *,
  50                                 enum md_ns, int);
  51 static  ssize_t         xml_printtagargs(struct md_mbuf *,
  52                                 const int *, const char **);
  53
  54
  55 static ssize_t
  56 xml_printtagargs(struct md_mbuf *mbuf, const int *argc,
  57                 const char **argv)
  58 {
  59         int              i, c;
  60         size_t           res;
  61
  62         if (NULL == argc || NULL == argv)
  63                 return(0);
  64         assert(argc && argv);
  65
  66         /* LINTED */
  67         for (res = 0, i = 0; ROFF_ARGMAX != (c = argc[i]); i++) {
  68                 if ( ! ml_nputs(mbuf, " ", 1, &res))
  69                         return(-1);
  70
  71                 /* FIXME: should puke on some, no? */
  72
  73                 if ( ! ml_puts(mbuf, tokargnames[c], &res))
  74                         return(-1);
  75                 if ( ! ml_nputs(mbuf, "=\"", 2, &res))
  76                         return(-1);
  77                 if (argv[i]) {
  78                         if ( ! ml_putstring(mbuf, argv[i], &res))
  79                                 return(-1);
  80                 } else if ( ! ml_nputs(mbuf, "true", 4, &res))
  81                         return(-1);
  82                 if ( ! ml_nputs(mbuf, "\"", 1, &res))
  83                         return(-1);
  84         }
  85
  86         return((ssize_t)res);
  87 }
  88
  89
  90 static ssize_t
  91 xml_printtagname(struct md_mbuf *mbuf, enum md_ns ns, int tok)
  92 {
  93         size_t           res;
  94
  95         res = 0;
  96         switch (ns) {
  97         case (MD_NS_BLOCK):
  98                 if ( ! ml_nputs(mbuf, "block:", 6, &res))
  99                         return(-1);
 100                 break;
 101         case (MD_NS_INLINE):
 102                 if ( ! ml_nputs(mbuf, "inline:", 7, &res))
 103                         return(-1);
 104                 break;
 105         case (MD_NS_BODY):
 106                 if ( ! ml_nputs(mbuf, "body:", 5, &res))
 107                         return(-1);
 108                 break;
 109         case (MD_NS_HEAD):
 110                 if ( ! ml_nputs(mbuf, "head:", 5, &res))
 111                         return(-1);
 112                 break;
 113         default:
 114                 break;
 115         }
 116
 117         if ( ! ml_puts(mbuf, toknames[tok], &res))
 118                 return(-1);
 119         return((ssize_t)res);
 120 }
 121
 122
 123 /* ARGSUSED */
 124 static int
 125 xml_begin(struct md_mbuf *mbuf, const struct md_args *args,
 126                 const struct tm *tm, const char *os,
 127                 const char *title, enum roffmsec sec, enum roffvol vol)
 128 {
 129
 130         if ( ! ml_puts(mbuf, "<?xml version=\"1.0\" "
 131                                 "encoding=\"UTF-8\"?>\n", NULL))
 132                 return(0);
 133         return(ml_puts(mbuf, "<mdoc xmlns:block=\"block\" "
 134                                 "xmlns:body=\"body\" "
 135                                 "xmlns:head=\"head\" "
 136                                 "xmlns:inline=\"inline\">", NULL));
 137 }
 138
 139
 140 /* ARGSUSED */
 141 static int
 142 xml_end(struct md_mbuf *mbuf, const struct md_args *args)
 143 {
 144
 145         return(ml_puts(mbuf, "</mdoc>", NULL));
 146 }
 147
 148
 149 /* ARGSUSED */
 150 static ssize_t
 151 xml_beginstring(struct md_mbuf *mbuf,
 152                 const struct md_args *args,
 153                 const char *buf, size_t sz)
 154 {
 155
 156         return(0);
 157 }
 158
 159
 160 /* ARGSUSED */
 161 static ssize_t
 162 xml_endstring(struct md_mbuf *mbuf,
 163                 const struct md_args *args,
 164                 const char *buf, size_t sz)
 165 {
 166
 167         return(0);
 168 }
 169
 170
 171 /* ARGSUSED */
 172 static ssize_t
 173 xml_begintag(struct md_mbuf *mbuf, void *data,
 174                 const struct md_args *args, enum md_ns ns,
 175                 int tok, const int *argc, const char **argv)
 176 {
 177         ssize_t          res, sz;
 178
 179         if (-1 == (res = xml_printtagname(mbuf, ns, tok)))
 180                 return(-1);
 181         if (-1 == (sz = xml_printtagargs(mbuf, argc, argv)))
 182                 return(-1);
 183         return(res + sz);
 184 }
 185
 186
 187 /* ARGSUSED */
 188 static ssize_t
 189 xml_endtag(struct md_mbuf *mbuf, void *data,
 190                 const struct md_args *args, enum md_ns ns, int tok)
 191 {
 192
 193         return(xml_printtagname(mbuf, ns, tok));
 194 }
 195
 196
 197 /* ARGSUSED */
 198 int
 199 xml_alloc(void **p)
 200 {
 201
 202         *p = NULL;
 203         return(1);
 204 }
 205
 206
 207 /* ARGSUSED */
 208 void
 209 xml_free(void *p)
 210 {
 211
 212         /* Do nothing. */
 213 }
 214
 215
 216 int
 217 md_line_xml(void *data, char *buf)
 218 {
 219
 220         return(mlg_line((struct md_mlg *)data, buf));
 221 }
 222
 223
 224 int
 225 md_exit_xml(void *data, int flush)
 226 {
 227
 228         return(mlg_exit((struct md_mlg *)data, flush));
 229 }
 230
 231
 232 void *
 233 md_init_xml(const struct md_args *args,
 234                 struct md_mbuf *mbuf, const struct md_rbuf *rbuf)
 235 {
 236         struct ml_cbs    cbs;
 237
 238         cbs.ml_alloc = xml_alloc;
 239         cbs.ml_free = xml_free;
 240         cbs.ml_begintag = xml_begintag;
 241         cbs.ml_endtag = xml_endtag;
 242         cbs.ml_begin = xml_begin;
 243         cbs.ml_end = xml_end;
 244         cbs.ml_beginstring = xml_beginstring;
 245         cbs.ml_endstring = xml_endstring;
 246
 247         return(mlg_alloc(args, rbuf, mbuf, &cbs));
 248 }
 249