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#include <string.h>
#include "buffer.h"
#include "etag.h"
int etag_is_equal(buffer *etag, const char *matches) {
if (0 == strcmp(etag->ptr, matches)) return 1;
return 0;
}
int etag_create(buffer *etag, struct stat *st) {
buffer_copy_off_t(etag, st->st_ino);
buffer_append_string_len(etag, CONST_STR_LEN("-"));
buffer_append_off_t(etag, st->st_size);
buffer_append_string_len(etag, CONST_STR_LEN("-"));
buffer_append_long(etag, st->st_mtime);
return 0;
}
int etag_mutate(buffer *mut, buffer *etag) {
size_t h, i;
for (h=0, i=0; i < etag->used; ++i) h = (h<<5)^(h>>27)^(etag->ptr[i]);
buffer_reset(mut);
buffer_copy_string_len(mut, CONST_STR_LEN("\""));
buffer_append_long(mut, h);
buffer_append_string_len(mut, CONST_STR_LEN("\""));
return 0;
}
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