diplodocus.org Git - nmh/blob - uip/mhfree.c

   1
   2 /*
   3  * mhfree.c -- routines to free the data structures used to
   4  *          -- represent MIME messages
   5  *
   6  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   7  * COPYRIGHT file in the root directory of the nmh distribution for
   8  * complete copyright information.
   9  */
  10
  11 #include <h/mh.h>
  12 #include <h/mime.h>
  13 #include <h/mhparse.h>
  14
  15 /* The list of top-level contents to display */
  16 CT *cts = NULL;
  17
  18 /*
  19  * prototypes
  20  */
  21 void free_header (CT);
  22 void free_ctinfo (CT);
  23 void free_encoding (CT, int);
  24 void freects_done (int);
  25
  26 /*
  27  * static prototypes
  28  */
  29 static void free_text (CT);
  30 static void free_multi (CT);
  31 static void free_partial (CT);
  32 static void free_external (CT);
  33
  34
  35 /*
  36  * Primary routine to free a MIME content structure
  37  */
  38
  39 void
  40 free_content (CT ct)
  41 {
  42     if (!ct)
  43         return;
  44
  45     /*
  46      * free all the header fields
  47      */
  48     free_header (ct);
  49
  50     if (ct->c_partno)
  51         free (ct->c_partno);
  52
  53     if (ct->c_vrsn)
  54         free (ct->c_vrsn);
  55
  56     if (ct->c_ctline)
  57         free (ct->c_ctline);
  58
  59     free_ctinfo (ct);
  60
  61     /*
  62      * some of the content types have extra
  63      * parts which need to be freed.
  64      */
  65     switch (ct->c_type) {
  66         case CT_MULTIPART:
  67             free_multi (ct);
  68             break;
  69
  70         case CT_MESSAGE:
  71             switch (ct->c_subtype) {
  72                 case MESSAGE_PARTIAL:
  73                     free_partial (ct);
  74                     break;
  75
  76                 case MESSAGE_EXTERNAL:
  77                     free_external (ct);
  78                     break;
  79             }
  80             break;
  81
  82         case CT_TEXT:
  83             free_text (ct);
  84             break;
  85     }
  86
  87     if (ct->c_showproc)
  88         free (ct->c_showproc);
  89     if (ct->c_termproc)
  90         free (ct->c_termproc);
  91     if (ct->c_storeproc)
  92         free (ct->c_storeproc);
  93
  94     if (ct->c_celine)
  95         free (ct->c_celine);
  96
  97     /* free structures for content encodings */
  98     free_encoding (ct, 1);
  99
 100     if (ct->c_id)
 101         free (ct->c_id);
 102     if (ct->c_descr)
 103         free (ct->c_descr);
 104     if (ct->c_dispo)
 105         free (ct->c_dispo);
 106
 107     if (ct->c_file) {
 108         if (ct->c_unlink)
 109             unlink (ct->c_file);
 110         free (ct->c_file);
 111     }
 112     if (ct->c_fp)
 113         fclose (ct->c_fp);
 114
 115     if (ct->c_storage)
 116         free (ct->c_storage);
 117     if (ct->c_folder)
 118         free (ct->c_folder);
 119
 120     free (ct);
 121 }
 122
 123
 124 /*
 125  * Free the linked list of header fields
 126  * for this content.
 127  */
 128
 129 void
 130 free_header (CT ct)
 131 {
 132     HF hp1, hp2;
 133
 134     hp1 = ct->c_first_hf;
 135     while (hp1) {
 136         hp2 = hp1->next;
 137
 138         free (hp1->name);
 139         free (hp1->value);
 140         free (hp1);
 141
 142         hp1 = hp2;
 143     }
 144
 145     ct->c_first_hf = NULL;
 146     ct->c_last_hf  = NULL;
 147 }
 148
 149
 150 void
 151 free_ctinfo (CT ct)
 152 {
 153     char **ap;
 154     CI ci;
 155
 156     ci = &ct->c_ctinfo;
 157     if (ci->ci_type) {
 158         free (ci->ci_type);
 159         ci->ci_type = NULL;
 160     }
 161     if (ci->ci_subtype) {
 162         free (ci->ci_subtype);
 163         ci->ci_subtype = NULL;
 164     }
 165     for (ap = ci->ci_attrs; *ap; ap++) {
 166         free (*ap);
 167         *ap = NULL;
 168     }
 169     if (ci->ci_comment) {
 170         free (ci->ci_comment);
 171         ci->ci_comment = NULL;
 172     }
 173     if (ci->ci_magic) {
 174         free (ci->ci_magic);
 175         ci->ci_magic = NULL;
 176     }
 177 }
 178
 179
 180 static void
 181 free_text (CT ct)
 182 {
 183     struct text *t;
 184
 185     if (!(t = (struct text *) ct->c_ctparams))
 186         return;
 187
 188     free ((char *) t);
 189     ct->c_ctparams = NULL;
 190 }
 191
 192
 193 static void
 194 free_multi (CT ct)
 195 {
 196     struct multipart *m;
 197     struct part *part, *next;
 198
 199     if (!(m = (struct multipart *) ct->c_ctparams))
 200         return;
 201
 202     if (m->mp_start)
 203         free (m->mp_start);
 204     if (m->mp_stop)
 205         free (m->mp_stop);
 206     free (m->mp_content_before);
 207     free (m->mp_content_after);
 208
 209     for (part = m->mp_parts; part; part = next) {
 210         next = part->mp_next;
 211         free_content (part->mp_part);
 212         free ((char *) part);
 213     }
 214     m->mp_parts = NULL;
 215
 216     free ((char *) m);
 217     ct->c_ctparams = NULL;
 218 }
 219
 220
 221 static void
 222 free_partial (CT ct)
 223 {
 224     struct partial *p;
 225
 226     if (!(p = (struct partial *) ct->c_ctparams))
 227         return;
 228
 229     if (p->pm_partid)
 230         free (p->pm_partid);
 231
 232     free ((char *) p);
 233     ct->c_ctparams = NULL;
 234 }
 235
 236
 237 static void
 238 free_external (CT ct)
 239 {
 240     struct exbody *e;
 241
 242     if (!(e = (struct exbody *) ct->c_ctparams))
 243         return;
 244
 245     free_content (e->eb_content);
 246     if (e->eb_body)
 247         free (e->eb_body);
 248     if (e->eb_url)
 249         free (e->eb_url);
 250
 251     free ((char *) e);
 252     ct->c_ctparams = NULL;
 253 }
 254
 255
 256 /*
 257  * Free data structures related to encoding/decoding
 258  * Content-Transfer-Encodings.
 259  */
 260
 261 void
 262 free_encoding (CT ct, int toplevel)
 263 {
 264     CE ce = &ct->c_cefile;
 265
 266     if (ce->ce_fp) {
 267         fclose (ce->ce_fp);
 268         ce->ce_fp = NULL;
 269     }
 270
 271     if (ce->ce_file) {
 272         if (ce->ce_unlink)
 273             unlink (ce->ce_file);
 274         free (ce->ce_file);
 275         ce->ce_file = NULL;
 276     }
 277
 278     if (! toplevel) {
 279         ct->c_ceopenfnx = NULL;
 280     }
 281 }
 282
 283
 284 void
 285 freects_done (int status)
 286 {
 287     CT *ctp;
 288
 289     if ((ctp = cts))
 290         for (; *ctp; ctp++)
 291             free_content (*ctp);
 292
 293     exit (status);
 294 }