-static int
-convert_codeset (CT ct, char *dest_codeset, int *message_mods) {
- char *src_codeset = content_codeset (ct);
- int status = OK;
-
- /* norm_charmap() is case sensitive. */
- char *src_codeset_u = upcase (src_codeset);
- char *dest_codeset_u = upcase (dest_codeset);
- int different_codesets =
- strcmp (norm_charmap (src_codeset), norm_charmap (dest_codeset));
-
- free (dest_codeset_u);
- free (src_codeset_u);
-
- if (different_codesets) {
-#ifdef HAVE_ICONV
- iconv_t conv_desc = NULL;
- char *dest;
- int fd = -1;
- char **file = NULL;
- FILE **fp = NULL;
- size_t begin;
- size_t end;
- int opened_input_file = 0;
- char src_buffer[BUFSIZ];
- HF hf;
- char *tempfile;
-
- if ((conv_desc = iconv_open (dest_codeset, src_codeset)) ==
- (iconv_t) -1) {
- advise (NULL, "Can't convert %s to %s", src_codeset, dest_codeset);
- return -1;
- }
-
- if ((tempfile = m_mktemp2 (NULL, invo_name, &fd, NULL)) == NULL) {
- adios (NULL, "unable to create temporary file in %s",
- get_temp_dir());
- }
- dest = add (tempfile, NULL);
-
- if (ct->c_cefile.ce_file) {
- file = &ct->c_cefile.ce_file;
- fp = &ct->c_cefile.ce_fp;
- begin = end = 0;
- } else if (ct->c_file) {
- file = &ct->c_file;
- fp = &ct->c_fp;
- begin = (size_t) ct->c_begin;
- end = (size_t) ct->c_end;
- } /* else no input file: shouldn't happen */
-
- if (file && *file && fp) {
- if (! *fp) {
- if ((*fp = fopen (*file, "r")) == NULL) {
- advise (*file, "unable to open for reading");
- status = NOTOK;
- } else {
- opened_input_file = 1;
- }
- }
- }
-
- if (fp && *fp) {
- size_t inbytes;
- size_t bytes_to_read =
- end > 0 && end > begin ? end - begin : sizeof src_buffer;
-
- fseeko (*fp, begin, SEEK_SET);
- while ((inbytes = fread (src_buffer, 1,
- min (bytes_to_read, sizeof src_buffer),
- *fp)) > 0) {
- char dest_buffer[BUFSIZ];
- ICONV_CONST char *ib = src_buffer;
- char *ob = dest_buffer;
- size_t outbytes = sizeof dest_buffer;
- size_t outbytes_before = outbytes;
-
- if (end > 0) bytes_to_read -= inbytes;
-
- if (iconv (conv_desc, &ib, &inbytes, &ob, &outbytes) ==
- (size_t) -1) {
- status = NOTOK;
- break;
- } else {
- write (fd, dest_buffer, outbytes_before - outbytes);
- }
- }
-
- if (opened_input_file) {
- fclose (*fp);
- *fp = NULL;
- }
- }
-
- iconv_close (conv_desc);
- close (fd);
-
- if (status == OK) {
- /* Replace the decoded file with the converted one. */
- if (ct->c_cefile.ce_file) {
- if (ct->c_cefile.ce_unlink) {
- (void) m_unlink (ct->c_cefile.ce_file);
- }
- free (ct->c_cefile.ce_file);
- }
- ct->c_cefile.ce_file = dest;
- ct->c_cefile.ce_unlink = 1;
-
- ++*message_mods;
- if (verbosw) {
- report (ct->c_partno, ct->c_file, "convert %s to %s",
- src_codeset, dest_codeset);
- }
-
- /* Update ci_attrs. */
- src_codeset = dest_codeset;
-
- /* Update ct->c_ctline. */
- if (ct->c_ctline) {
- char *ctline =
- update_attr (ct->c_ctline, "charset=", dest_codeset);
-
- free (ct->c_ctline);
- ct->c_ctline = ctline;
- } /* else no CT line, which is odd */
-
- /* Update Content-Type header field. */
- for (hf = ct->c_first_hf; hf; hf = hf->next) {
- if (! strcasecmp (TYPE_FIELD, hf->name)) {
- char *ctline_less_newline =
- update_attr (hf->value, "charset=", dest_codeset);
- char *ctline = concat (ctline_less_newline, "\n", NULL);
- free (ctline_less_newline);
-
- free (hf->value);
- hf->value = ctline;
- break;
- }
- }
- } else {
- (void) m_unlink (dest);
- }
-#else /* ! HAVE_ICONV */
- NMH_UNUSED (message_mods);
-
- advise (NULL, "Can't convert %s to %s without iconv", src_codeset,
- dest_codeset);
- status = NOTOK;
-#endif /* ! HAVE_ICONV */
- }
-
- return status;
-}
-
-
projects / nmh / commitdiff