+ return h1 == NULL && h2 == NULL;
+}
+
+
+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;
+
+ tok->dptr = vskipspaces(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))
+ || ((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) - 'A' + 1) & 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) - 'A' + 1);
+ } else {
+ mutt_buffer_addch(dest, '^');
+ mutt_buffer_addch(dest, ch);
+ }
+ } else
+ if (ch == '`' && (!qc || qc == '"')) {
+ FILE *fp;
+ pid_t pid;
+ char *cmd, *ptr;
+ ssize_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) {
+ return -1;
+ }
+
+ cmd = p_dupstr(tok->dptr, pc - tok->dptr);
+ if ((pid = mutt_create_filter(cmd, NULL, &fp, NULL)) < 0) {
+ p_delete(&cmd);
+ return -1;
+ }
+ p_delete(&cmd);
+
+ tok->dptr = pc + 1;
+
+ /* read line */
+ p_clear(&expn, 1);
+ expn.data = mutt_read_line(NULL, &expn.dsize, fp, &line);
+ m_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);
+ p_delete(&expn.data);
+ } else
+ if (expn.data) {
+ expnlen = m_strlen(expn.data);
+ tok->dsize = expnlen + m_strlen(tok->dptr) + 1;
+ ptr = xmalloc(tok->dsize);
+ memcpy(ptr, expn.data, expnlen);
+ m_strcpy(ptr + expnlen, tok->dsize - expnlen, tok->dptr);
+ if (tok->destroy)
+ p_delete(&tok->data);
+ tok->data = ptr;
+ tok->dptr = ptr;
+ tok->destroy = 1; /* mark that the caller should destroy this data */
+ ptr = NULL;
+ p_delete(&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 = p_dupstr(tok->dptr, pc - tok->dptr);
+ tok->dptr = pc + 1;
+ }
+ } else {
+ for (pc = tok->dptr; isalnum((unsigned char)*pc) || *pc == '_';
+ pc++);
+ var = p_dupstr(tok->dptr, pc - tok->dptr);
+ tok->dptr = pc;
+ }
+ if (var) {
+ char tmp[STRING];
+ if ((env = getenv (var))
+ || (mutt_option_value (var, tmp, sizeof (tmp)) && (env = tmp)))
+ {
+ mutt_buffer_addstr (dest, env);
+ }
+ }
+ p_delete(&var);
+ } else {
+ mutt_buffer_addch(dest, ch);
+ }
+ }
+ mutt_buffer_addch(dest, 0); /* terminate the string */
+ tok->dptr = vskipspaces(tok->dptr);
+ return 0;