diff options
Diffstat (limited to 'foomaticrip.c')
-rw-r--r-- | foomaticrip.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/foomaticrip.c b/foomaticrip.c index aad3953..089e4ff 100644 --- a/foomaticrip.c +++ b/foomaticrip.c @@ -946,16 +946,22 @@ enum FileType { int guess_file_type(const char *begin, size_t len, int *startpos) { - const char * p; - - p = memchr(begin, '%', len); - if (!p) - return UNKNOWN_FILE; - *startpos = p - begin; - if (!memcmp(p, "%!", 2)) - return PS_FILE; - else if (!memcmp(p, "%PDF-1.", 7)) - return PDF_FILE; + const char * p, * end; + p = begin; + end = begin + len; + + while (p < end) + { + p = memchr(p, '%', end - p); + if (!p) + return UNKNOWN_FILE; + *startpos = p - begin; + if ((end - p) > 2 && !memcmp(p, "%!", 2)) + return PS_FILE; + else if ((end - p) > 7 && !memcmp(p, "%PDF-1.", 7)) + return PDF_FILE; + ++ p; + } *startpos = 0; return UNKNOWN_FILE; } |