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

   1 /* mhfree.c -- routines to free the data structures used to
   2  *          -- represent MIME messages
   3  *
   4  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   5  * COPYRIGHT file in the root directory of the nmh distribution for
   6  * complete copyright information.
   7  */
   8
   9 #include <h/mh.h>
  10 #include <h/utils.h>
  11 #include <h/mime.h>
  12 #include <h/mhparse.h>
  13 #include "sbr/m_mktemp.h"
  14 #include "mhfree.h"
  15
  16 /* The list of top-level contents to display */
  17 CT *cts = NULL;
  18
  19 /*
  20  * static prototypes
  21  */
  22 static void free_header (CT);
  23 static void free_text (CT);
  24 static void free_multi (CT);
  25 static void free_partial (CT);
  26 static void free_external (CT);
  27 static void free_pmlist (PM *);
  28
  29
  30 /*
  31  * Primary routine to free a MIME content structure
  32  */
  33
  34 void
  35 free_content (CT ct)
  36 {
  37     if (!ct)
  38         return;
  39
  40     /*
  41      * free all the header fields
  42      */
  43     free_header (ct);
  44
  45     free(ct->c_partno);
  46     free(ct->c_vrsn);
  47     free(ct->c_ctline);
  48     ct->c_partno = ct->c_vrsn = ct->c_ctline = NULL;
  49
  50     free_ctinfo (ct);
  51
  52     /*
  53      * some of the content types have extra
  54      * parts which need to be freed.
  55      */
  56     switch (ct->c_type) {
  57         case CT_MULTIPART:
  58             free_multi (ct);
  59             break;
  60
  61         case CT_MESSAGE:
  62             switch (ct->c_subtype) {
  63                 case MESSAGE_PARTIAL:
  64                     free_partial (ct);
  65                     break;
  66
  67                 case MESSAGE_EXTERNAL:
  68                     free_external (ct);
  69                     break;
  70             }
  71             break;
  72
  73         default:
  74             /* Assume that the ct is for text.  mhfixmsg(1) uses it for
  75                decoding application content. */
  76             free_text (ct);
  77             break;
  78     }
  79
  80     free(ct->c_showproc);
  81     free(ct->c_termproc);
  82     free(ct->c_storeproc);
  83     ct->c_showproc = ct->c_termproc = ct->c_storeproc = NULL;
  84
  85     free(ct->c_celine);
  86     ct->c_celine = NULL;
  87
  88     /* free structures for content encodings */
  89     free_encoding (ct, 1);
  90
  91     free(ct->c_id);
  92     free(ct->c_descr);
  93     free(ct->c_dispo);
  94     free(ct->c_dispo_type);
  95     ct->c_id = ct->c_descr = ct->c_dispo = ct->c_dispo_type = NULL;
  96     free_pmlist (&ct->c_dispo_first);
  97
  98     if (ct->c_file) {
  99         if (ct->c_unlink)
 100             (void) m_unlink (ct->c_file);
 101         free (ct->c_file);
 102         ct->c_file = NULL;
 103     }
 104     if (ct->c_fp) {
 105         fclose (ct->c_fp);
 106         ct->c_fp = NULL;
 107     }
 108
 109     free(ct->c_storage);
 110     free(ct->c_folder);
 111     ct->c_storage = ct->c_folder = NULL;
 112
 113     free (ct);
 114 }
 115
 116
 117 /*
 118  * Free the linked list of header fields
 119  * for this content.
 120  */
 121
 122 static void
 123 free_header (CT ct)
 124 {
 125     HF hp1, hp2;
 126
 127     hp1 = ct->c_first_hf;
 128     while (hp1) {
 129         hp2 = hp1->next;
 130
 131         free (hp1->name);
 132         free (hp1->value);
 133         free (hp1);
 134
 135         hp1 = hp2;
 136     }
 137
 138     ct->c_first_hf = NULL;
 139     ct->c_last_hf  = NULL;
 140 }
 141
 142
 143 void
 144 free_ctinfo (CT ct)
 145 {
 146     CI ci;
 147
 148     ci = &ct->c_ctinfo;
 149     free(ci->ci_type);
 150     free(ci->ci_subtype);
 151     ci->ci_type = ci->ci_subtype = NULL;
 152     free_pmlist(&ci->ci_first_pm);
 153     free(ci->ci_comment);
 154     free(ci->ci_magic);
 155     ci->ci_comment = ci->ci_magic = NULL;
 156 }
 157
 158
 159 static void
 160 free_text (CT ct)
 161 {
 162     struct text *t;
 163
 164     if (!(t = (struct text *) ct->c_ctparams))
 165         return;
 166
 167     free(t);
 168     ct->c_ctparams = NULL;
 169 }
 170
 171
 172 static void
 173 free_multi (CT ct)
 174 {
 175     struct multipart *m;
 176     struct part *part, *next;
 177
 178     if (!(m = (struct multipart *) ct->c_ctparams))
 179         return;
 180
 181     free(m->mp_start);
 182     free(m->mp_stop);
 183     free (m->mp_content_before);
 184     free (m->mp_content_after);
 185
 186     for (part = m->mp_parts; part; part = next) {
 187         next = part->mp_next;
 188         free_content (part->mp_part);
 189         free(part);
 190     }
 191     m->mp_parts = NULL;
 192
 193     free(m);
 194     ct->c_ctparams = NULL;
 195 }
 196
 197
 198 static void
 199 free_partial (CT ct)
 200 {
 201     struct partial *p;
 202
 203     if (!(p = (struct partial *) ct->c_ctparams))
 204         return;
 205
 206     free(p->pm_partid);
 207
 208     free(p);
 209     ct->c_ctparams = NULL;
 210 }
 211
 212
 213 static void
 214 free_external (CT ct)
 215 {
 216     struct exbody *e;
 217
 218     if (!(e = (struct exbody *) ct->c_ctparams))
 219         return;
 220
 221     free_content (e->eb_content);
 222     free(e->eb_body);
 223     free(e->eb_url);
 224     free(e);
 225     ct->c_ctparams = NULL;
 226 }
 227
 228
 229 static void
 230 free_pmlist (PM *p)
 231 {
 232     PM pm = *p, pm2;
 233
 234     while (pm != NULL) {
 235         free(pm->pm_name);
 236         free(pm->pm_value);
 237         free(pm->pm_charset);
 238         free(pm->pm_lang);
 239         pm2 = pm->pm_next;
 240         free(pm);
 241         pm = pm2;
 242     }
 243
 244     if (*p)
 245         *p = NULL;
 246 }
 247
 248
 249 /*
 250  * Free data structures related to encoding/decoding
 251  * Content-Transfer-Encodings.
 252  */
 253
 254 void
 255 free_encoding (CT ct, int toplevel)
 256 {
 257     CE ce = &ct->c_cefile;
 258
 259     if (ce->ce_fp) {
 260         fclose (ce->ce_fp);
 261         ce->ce_fp = NULL;
 262     }
 263
 264     if (ce->ce_file) {
 265         if (ce->ce_unlink)
 266             (void) m_unlink (ce->ce_file);
 267         free (ce->ce_file);
 268         ce->ce_file = NULL;
 269     }
 270
 271     if (! toplevel) {
 272         ct->c_ceopenfnx = NULL;
 273     }
 274 }
 275
 276
 277 void NORETURN
 278 freects_done (int status)
 279 {
 280     CT *ctp;
 281
 282     for (ctp = cts; ctp && *ctp; ctp++)
 283         free_content (*ctp);
 284
 285     free (cts);
 286
 287     exit (status);
 288 }