1 #include "buffer.h"
2 #include "etag.h"
3
4 #if defined HAVE_STDINT_H
5 # include <stdint.h>
6 #elif defined HAVE_INTTYPES_H
7 # include <inttypes.h>
8 #endif
9
10 #include <string.h>
11
etag_is_equal(buffer * etag,const char * matches)12 int etag_is_equal(buffer *etag, const char *matches) {
13 if (etag && !buffer_is_empty(etag) && 0 == strcmp(etag->ptr, matches)) return 1;
14 return 0;
15 }
16
etag_create(buffer * etag,struct stat * st,etag_flags_t flags)17 int etag_create(buffer *etag, struct stat *st,etag_flags_t flags) {
18 if (0 == flags) return 0;
19
20 buffer_reset(etag);
21
22 if (flags & ETAG_USE_INODE) {
23 buffer_append_off_t(etag, st->st_ino);
24 buffer_append_string_len(etag, CONST_STR_LEN("-"));
25 }
26
27 if (flags & ETAG_USE_SIZE) {
28 buffer_append_off_t(etag, st->st_size);
29 buffer_append_string_len(etag, CONST_STR_LEN("-"));
30 }
31
32 if (flags & ETAG_USE_MTIME) {
33 buffer_append_long(etag, st->st_mtime);
34 }
35
36 return 0;
37 }
38
etag_mutate(buffer * mut,buffer * etag)39 int etag_mutate(buffer *mut, buffer *etag) {
40 size_t i;
41 uint32_t h;
42
43 for (h=0, i=0; i < etag->used-1; ++i) h = (h<<5)^(h>>27)^(etag->ptr[i]);
44
45 buffer_reset(mut);
46 buffer_copy_string_len(mut, CONST_STR_LEN("\""));
47 buffer_append_off_t(mut, h);
48 buffer_append_string_len(mut, CONST_STR_LEN("\""));
49
50 return 0;
51 }
52