-int mutt_extract_token (BUFFER * dest, BUFFER * tok, int flags)
-{
- char ch;
- char qc = 0; /* quote char */
- char *pc;
-
- /* reset the destination pointer to the beginning of the buffer */
- dest->dptr = dest->data;
-
- SKIPWS (tok->dptr);
- while ((ch = *tok->dptr)) {
- if (!qc) {
- if ((ISSPACE (ch) && !(flags & M_TOKEN_SPACE)) ||
- (ch == '#' && !(flags & M_TOKEN_COMMENT)) ||
- (ch == '=' && (flags & M_TOKEN_EQUAL)) ||
- (ch == ';' && !(flags & M_TOKEN_SEMICOLON)) ||
- ((flags & M_TOKEN_PATTERN) && strchr ("~!|", ch)))
- break;
- }
-
- tok->dptr++;
-
- if (ch == qc)
- qc = 0; /* end of quote */
- else if (!qc && (ch == '\'' || ch == '"') && !(flags & M_TOKEN_QUOTE))
- qc = ch;
- else if (ch == '\\' && qc != '\'') {
- if (!*tok->dptr)
- return -1; /* premature end of token */
- switch (ch = *tok->dptr++) {
- case 'c':
- case 'C':
- if (!*tok->dptr)
- return -1; /* premature end of token */
- mutt_buffer_addch (dest, (toupper ((unsigned char) *tok->dptr)
- - '@') & 0x7f);
- tok->dptr++;
- break;
- case 'r':
- mutt_buffer_addch (dest, '\r');
- break;
- case 'n':
- mutt_buffer_addch (dest, '\n');
- break;
- case 't':
- mutt_buffer_addch (dest, '\t');
- break;
- case 'f':
- mutt_buffer_addch (dest, '\f');
- break;
- case 'e':
- mutt_buffer_addch (dest, '\033');
- break;
- default:
- if (isdigit ((unsigned char) ch) &&
- isdigit ((unsigned char) *tok->dptr) &&
- isdigit ((unsigned char) *(tok->dptr + 1))) {
-
- mutt_buffer_addch (dest,
- (ch << 6) + (*tok->dptr << 3) + *(tok->dptr +
- 1) - 3504);
- tok->dptr += 2;
- }
- else
- mutt_buffer_addch (dest, ch);
- }
- }
- else if (ch == '^' && (flags & M_TOKEN_CONDENSE)) {
- if (!*tok->dptr)
- return -1; /* premature end of token */
- ch = *tok->dptr++;
- if (ch == '^')
- mutt_buffer_addch (dest, ch);
- else if (ch == '[')
- mutt_buffer_addch (dest, '\033');
- else if (isalpha ((unsigned char) ch))
- mutt_buffer_addch (dest, toupper ((unsigned char) ch) - '@');
- else {
- mutt_buffer_addch (dest, '^');
- mutt_buffer_addch (dest, ch);
- }
- }
- else if (ch == '`' && (!qc || qc == '"')) {
- FILE *fp;
- pid_t pid;
- char *cmd, *ptr;
- size_t expnlen;
- BUFFER expn;
- int line = 0;
-
- pc = tok->dptr;
- do {
- if ((pc = strpbrk (pc, "\\`"))) {
- /* skip any quoted chars */
- if (*pc == '\\')
- pc += 2;
- }
- } while (pc && *pc != '`');
- if (!pc) {
- debug_print (1, ("mismatched backtics\n"));
- return (-1);
- }
- cmd = str_substrdup (tok->dptr, pc);
- if ((pid = mutt_create_filter (cmd, NULL, &fp, NULL)) < 0) {
- debug_print (1, ("unable to fork command: %s\n", cmd));
- FREE (&cmd);
- return (-1);
- }
- FREE (&cmd);
-
- tok->dptr = pc + 1;
-
- /* read line */
- memset (&expn, 0, sizeof (expn));
- expn.data = mutt_read_line (NULL, &expn.dsize, fp, &line);
- fclose (fp);
- mutt_wait_filter (pid);
-
- /* if we got output, make a new string consiting of the shell ouptput
- plus whatever else was left on the original line */
- /* BUT: If this is inside a quoted string, directly add output to
- * the token */
- if (expn.data && qc) {
- mutt_buffer_addstr (dest, expn.data);
- FREE (&expn.data);
- }
- else if (expn.data) {
- expnlen = mutt_strlen (expn.data);
- tok->dsize = expnlen + mutt_strlen (tok->dptr) + 1;
- ptr = safe_malloc (tok->dsize);
- memcpy (ptr, expn.data, expnlen);
- strcpy (ptr + expnlen, tok->dptr); /* __STRCPY_CHECKED__ */
- if (tok->destroy)
- FREE (&tok->data);
- tok->data = ptr;
- tok->dptr = ptr;
- tok->destroy = 1; /* mark that the caller should destroy this data */
- ptr = NULL;
- FREE (&expn.data);
- }
- }
- else if (ch == '$' && (!qc || qc == '"')
- && (*tok->dptr == '{' || isalpha ((unsigned char) *tok->dptr))) {
- char *env = NULL, *var = NULL;
-
- if (*tok->dptr == '{') {
- tok->dptr++;
- if ((pc = strchr (tok->dptr, '}'))) {
- var = str_substrdup (tok->dptr, pc);
- tok->dptr = pc + 1;
- }
- }
- else {
- for (pc = tok->dptr; isalnum ((unsigned char) *pc) || *pc == '_';
- pc++);
- var = str_substrdup (tok->dptr, pc);
- tok->dptr = pc;
- }
- if (var && (env = getenv (var)))
- mutt_buffer_addstr (dest, env);
- FREE (&var);
- }
- else
- mutt_buffer_addch (dest, ch);
- }
- mutt_buffer_addch (dest, 0); /* terminate the string */
- SKIPWS (tok->dptr);
- return 0;