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/utils.h>
  13 #include <h/mime.h>
  14 #include <h/mhparse.h>
  15
  16 /* The list of top-level contents to display */
  17 CT *cts = NULL;
  18
  19 /*
  20  * prototypes
  21  */
  22 void free_header (CT);
  23 void free_ctinfo (CT);
  24 void free_encoding (CT, int);
  25 void freects_done (int);
  26
  27 /*
  28  * static prototypes
  29  */
  30 static void free_text (CT);
  31 static void free_multi (CT);
  32 static void free_partial (CT);
  33 static void free_external (CT);
  34 static void free_pmlist (PM *);
  35
  36
  37 /*
  38  * Primary routine to free a MIME content structure
  39  */
  40
  41 void
  42 free_content (CT ct)
  43 {
  44     if (!ct)
  45         return;
  46
  47     /*
  48      * free all the header fields
  49      */
  50     free_header (ct);
  51
  52     mh_xfree(ct->c_partno);
  53     mh_xfree(ct->c_vrsn);
  54     mh_xfree(ct->c_ctline);
  55     ct->c_partno = ct->c_vrsn = ct->c_ctline = NULL;
  56
  57     free_ctinfo (ct);
  58
  59     /*
  60      * some of the content types have extra
  61      * parts which need to be freed.
  62      */
  63     switch (ct->c_type) {
  64         case CT_MULTIPART:
  65             free_multi (ct);
  66             break;
  67
  68         case CT_MESSAGE:
  69             switch (ct->c_subtype) {
  70                 case MESSAGE_PARTIAL:
  71                     free_partial (ct);
  72                     break;
  73
  74                 case MESSAGE_EXTERNAL:
  75                     free_external (ct);
  76                     break;
  77             }
  78             break;
  79
  80         case CT_TEXT:
  81             free_text (ct);
  82             break;
  83     }
  84
  85     mh_xfree(ct->c_showproc);
  86     mh_xfree(ct->c_termproc);
  87     mh_xfree(ct->c_storeproc);
  88     ct->c_showproc = ct->c_termproc = ct->c_storeproc = NULL;
  89
  90     mh_xfree(ct->c_celine);
  91     ct->c_celine = NULL;
  92
  93     /* free structures for content encodings */
  94     free_encoding (ct, 1);
  95
  96     mh_xfree(ct->c_id);
  97     mh_xfree(ct->c_descr);
  98     mh_xfree(ct->c_dispo);
  99     mh_xfree(ct->c_dispo_type);
 100     ct->c_id = ct->c_descr = ct->c_dispo = ct->c_dispo_type = NULL;
 101     free_pmlist (&ct->c_dispo_first);
 102
 103     if (ct->c_file) {
 104         if (ct->c_unlink)
 105             (void) m_unlink (ct->c_file);
 106         free (ct->c_file);
 107         ct->c_file = NULL;
 108     }
 109     if (ct->c_fp) {
 110         fclose (ct->c_fp);
 111         ct->c_fp = NULL;
 112     }
 113
 114     mh_xfree(ct->c_storage);
 115     mh_xfree(ct->c_folder);
 116     ct->c_storage = ct->c_folder = NULL;
 117
 118     free (ct);
 119 }
 120
 121
 122 /*
 123  * Free the linked list of header fields
 124  * for this content.
 125  */
 126
 127 void
 128 free_header (CT ct)
 129 {
 130     HF hp1, hp2;
 131
 132     hp1 = ct->c_first_hf;
 133     while (hp1) {
 134         hp2 = hp1->next;
 135
 136         free (hp1->name);
 137         free (hp1->value);
 138         free (hp1);
 139
 140         hp1 = hp2;
 141     }
 142
 143     ct->c_first_hf = NULL;
 144     ct->c_last_hf  = NULL;
 145 }
 146
 147
 148 void
 149 free_ctinfo (CT ct)
 150 {
 151     CI ci;
 152
 153     ci = &ct->c_ctinfo;
 154     mh_xfree(ci->ci_type);
 155     mh_xfree(ci->ci_subtype);
 156     ci->ci_type = ci->ci_subtype = NULL;
 157     free_pmlist(&ci->ci_first_pm);
 158     mh_xfree(ci->ci_comment);
 159     mh_xfree(ci->ci_magic);
 160     ci->ci_comment = ci->ci_magic = NULL;
 161 }
 162
 163
 164 static void
 165 free_text (CT ct)
 166 {
 167     struct text *t;
 168
 169     if (!(t = (struct text *) ct->c_ctparams))
 170         return;
 171
 172     free(t);
 173     ct->c_ctparams = NULL;
 174 }
 175
 176
 177 static void
 178 free_multi (CT ct)
 179 {
 180     struct multipart *m;
 181     struct part *part, *next;
 182
 183     if (!(m = (struct multipart *) ct->c_ctparams))
 184         return;
 185
 186     mh_xfree(m->mp_start);
 187     mh_xfree(m->mp_stop);
 188     free (m->mp_content_before);
 189     free (m->mp_content_after);
 190
 191     for (part = m->mp_parts; part; part = next) {
 192         next = part->mp_next;
 193         free_content (part->mp_part);
 194         free(part);
 195     }
 196     m->mp_parts = NULL;
 197
 198     free(m);
 199     ct->c_ctparams = NULL;
 200 }
 201
 202
 203 static void
 204 free_partial (CT ct)
 205 {
 206     struct partial *p;
 207
 208     if (!(p = (struct partial *) ct->c_ctparams))
 209         return;
 210
 211     mh_xfree(p->pm_partid);
 212
 213     free(p);
 214     ct->c_ctparams = NULL;
 215 }
 216
 217
 218 static void
 219 free_external (CT ct)
 220 {
 221     struct exbody *e;
 222
 223     if (!(e = (struct exbody *) ct->c_ctparams))
 224         return;
 225
 226     free_content (e->eb_content);
 227     mh_xfree(e->eb_body);
 228     mh_xfree(e->eb_url);
 229     free(e);
 230     ct->c_ctparams = NULL;
 231 }
 232
 233
 234 static void
 235 free_pmlist (PM *p)
 236 {
 237     PM pm = *p, pm2;
 238
 239     while (pm != NULL) {
 240         mh_xfree(pm->pm_name);
 241         mh_xfree(pm->pm_value);
 242         mh_xfree(pm->pm_charset);
 243         mh_xfree(pm->pm_lang);
 244         pm2 = pm->pm_next;
 245         free(pm);
 246         pm = pm2;
 247     }
 248
 249     if (*p)
 250         *p = NULL;
 251 }
 252
 253
 254 /*
 255  * Free data structures related to encoding/decoding
 256  * Content-Transfer-Encodings.
 257  */
 258
 259 void
 260 free_encoding (CT ct, int toplevel)
 261 {
 262     CE ce = &ct->c_cefile;
 263
 264     if (ce->ce_fp) {
 265         fclose (ce->ce_fp);
 266         ce->ce_fp = NULL;
 267     }
 268
 269     if (ce->ce_file) {
 270         if (ce->ce_unlink)
 271             (void) m_unlink (ce->ce_file);
 272         free (ce->ce_file);
 273         ce->ce_file = NULL;
 274     }
 275
 276     if (! toplevel) {
 277         ct->c_ceopenfnx = NULL;
 278     }
 279 }
 280
 281
 282 void
 283 freects_done (int status)
 284 {
 285     CT *ctp;
 286
 287     for (ctp = cts; ctp && *ctp; ctp++)
 288         free_content (*ctp);
 289
 290     free (cts);
 291
 292     exit (status);
 293 }