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Add hash_file2() and hash_fd2() functions that update two hash sums

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This commit is contained in:
Joel Rosdahl 2010-09-05 10:28:29 +02:00
parent 13fb386e0a
commit 95f1260b50
2 changed files with 29 additions and 2 deletions
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2
ccache.h
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@ -91,7 +91,9 @@ void hash_delimiter(struct mdfour *md, const char* type);
void hash_string(struct mdfour *md, const char *s);
void hash_int(struct mdfour *md, int x);
bool hash_fd(struct mdfour *md, int fd);
bool hash_fd2(struct mdfour *md1, struct mdfour *md2, int fd);
bool hash_file(struct mdfour *md, const char *fname);
bool hash_file2(struct mdfour *md1, struct mdfour *md2, const char *fname);
/* ------------------------------------------------------------------------- */
/* util.c */

29
hash.c
View File

@ -95,12 +95,27 @@ hash_int(struct mdfour *md, int x)
*/
bool
hash_fd(struct mdfour *md, int fd)
{
return hash_fd2(md, NULL, fd);
}
/*
* Add contents of an open file to the hash. Returns true on success, otherwise
* false.
*/
bool
hash_fd2(struct mdfour *md1, struct mdfour *md2, int fd)
{
char buf[1024];
ssize_t n;
while ((n = read(fd, buf, sizeof(buf))) > 0) {
hash_buffer(md, buf, n);
if (md1) {
hash_buffer(md1, buf, n);
}
if (md2) {
hash_buffer(md2, buf, n);
}
}
if (n == 0) {
return true;
@ -115,6 +130,16 @@ hash_fd(struct mdfour *md, int fd)
*/
bool
hash_file(struct mdfour *md, const char *fname)
{
return hash_file2(md, NULL, fname);
}
/*
* Add contents of a file to two hash sums. Returns true on success, otherwise
* false.
*/
bool
hash_file2(struct mdfour *md1, struct mdfour *md2, const char *fname)
{
int fd;
bool ret;
@ -124,7 +149,7 @@ hash_file(struct mdfour *md, const char *fname)
return false;
}
ret = hash_fd(md, fd);
ret = hash_fd2(md1, md2, fd);
close(fd);
return ret;
}