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csum-file: add "sha1fd()" to create a SHA1 csum file from an existing…

… file descriptor

We'll use this soon to write pack-files to stdout.
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1 parent 5571be7 commit 4397f0148ad0967cf3a2d794fb3d6b2c7f8738d7 Linus Torvalds committed Jun 28, 2005
Showing with 21 additions and 0 deletions.
  1. +20 −0 csum-file.c
  2. +1 −0 csum-file.h
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20 csum-file.c
@@ -96,6 +96,26 @@ struct sha1file *sha1create(const char *fmt, ...)
return f;
}
+struct sha1file *sha1fd(int fd, const char *name)
+{
+ struct sha1file *f;
+ unsigned len;
+
+ f = xmalloc(sizeof(*f));
+
+ len = strlen(name);
+ if (len >= PATH_MAX)
+ die("you wascally wabbit, you");
+ f->namelen = len;
+ memcpy(f->name, name, len+1);
+
+ f->fd = fd;
+ f->error = 0;
+ f->offset = 0;
+ SHA1_Init(&f->ctx);
+ return f;
+}
+
int sha1write_compressed(struct sha1file *f, void *in, unsigned int size)
{
z_stream stream;
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1 csum-file.h
@@ -10,6 +10,7 @@ struct sha1file {
unsigned char buffer[8192];
};
+extern struct sha1file *sha1fd(int fd, const char *name);
extern struct sha1file *sha1create(const char *fmt, ...);
extern int sha1close(struct sha1file *, unsigned char *, int);
extern int sha1write(struct sha1file *, void *, unsigned int);

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