mirror of
https://git.notmuchmail.org/git/notmuch
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126 lines
2.3 KiB
C
126 lines
2.3 KiB
C
#include "notmuch-private.h"
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#include "string-util.h"
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/* Advance 'str' past any whitespace or RFC 822 comments. A comment is
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* a (potentially nested) parenthesized sequence with '\' used to
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* escape any character (including parentheses).
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*
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* If the sequence to be skipped continues to the end of the string,
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* then 'str' will be left pointing at the final terminating '\0'
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* character.
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*/
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static void
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skip_space_and_comments (const char **str)
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{
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const char *s;
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s = *str;
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while (*s && (isspace (*s) || *s == '(')) {
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while (*s && isspace (*s))
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s++;
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if (*s == '(') {
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int nesting = 1;
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s++;
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while (*s && nesting) {
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if (*s == '(') {
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nesting++;
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} else if (*s == ')') {
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nesting--;
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} else if (*s == '\\') {
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if (*(s+1))
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s++;
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}
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s++;
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}
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}
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}
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*str = s;
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}
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char *
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_notmuch_message_id_parse (void *ctx, const char *message_id, const char **next)
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{
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const char *s, *end;
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char *result;
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if (message_id == NULL || *message_id == '\0')
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return NULL;
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s = message_id;
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skip_space_and_comments (&s);
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/* Skip any unstructured text as well. */
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while (*s && *s != '<')
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s++;
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if (*s == '<') {
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s++;
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} else {
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if (next)
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*next = s;
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return NULL;
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}
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skip_space_and_comments (&s);
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end = s;
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while (*end && *end != '>')
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end++;
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if (next) {
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if (*end)
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*next = end + 1;
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else
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*next = end;
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}
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if (end > s && *end == '>')
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end--;
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if (end <= s)
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return NULL;
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result = talloc_strndup (ctx, s, end - s + 1);
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/* Finally, collapse any whitespace that is within the message-id
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* itself. */
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{
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char *r;
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int len;
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for (r = result, len = strlen (r); *r; r++, len--)
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if (*r == ' ' || *r == '\t')
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memmove (r, r+1, len);
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}
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return result;
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}
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char *
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_notmuch_message_id_parse_strict (void *ctx, const char *message_id)
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{
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const char *s, *end;
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if (message_id == NULL || *message_id == '\0')
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return NULL;
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s = skip_space (message_id);
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if (*s == '<')
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s++;
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else
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return NULL;
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for (end = s; *end && *end != '>'; end++)
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if (isspace (*end))
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return NULL;
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if (*end != '>')
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return NULL;
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else {
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const char *last = skip_space (end + 1);
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if (*last != '\0')
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return NULL;
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}
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return talloc_strndup (ctx, s, end - s);
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}
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