[PATCH] Doc: update git-send-email-script documentation.

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index e808c91..df5eb2a 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1389,14 +1389,14 @@ int write_sha1_to_fd(int fd, const unsigned char *sha1)
        return 0;
 }
 
-int write_sha1_from_fd(const unsigned char *sha1, int fd)
+int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
+                      size_t bufsize, size_t *bufposn)
 {
        char *filename = sha1_file_name(sha1);
 
        int local;
        z_stream stream;
        unsigned char real_sha1[20];
-       unsigned char buf[4096];
        unsigned char discard[4096];
        int ret;
        SHA_CTX c;
@@ -1414,7 +1414,24 @@ int write_sha1_from_fd(const unsigned char *sha1, int fd)
 
        do {
                ssize_t size;
-               size = read(fd, buf, 4096);
+               if (*bufposn) {
+                       stream.avail_in = *bufposn;
+                       stream.next_in = buffer;
+                       do {
+                               stream.next_out = discard;
+                               stream.avail_out = sizeof(discard);
+                               ret = inflate(&stream, Z_SYNC_FLUSH);
+                               SHA1_Update(&c, discard, sizeof(discard) -
+                                           stream.avail_out);
+                       } while (stream.avail_in && ret == Z_OK);
+                       write(local, buffer, *bufposn - stream.avail_in);
+                       memmove(buffer, buffer + *bufposn - stream.avail_in,
+                               stream.avail_in);
+                       *bufposn = stream.avail_in;
+                       if (ret != Z_OK)
+                               break;
+               }
+               size = read(fd, buffer + *bufposn, bufsize - *bufposn);
                if (size <= 0) {
                        close(local);
                        unlink(filename);
@@ -1423,18 +1440,8 @@ int write_sha1_from_fd(const unsigned char *sha1, int fd)
                        perror("Reading from connection");
                        return -1;
                }
-               write(local, buf, size);
-               stream.avail_in = size;
-               stream.next_in = buf;
-               do {
-                       stream.next_out = discard;
-                       stream.avail_out = sizeof(discard);
-                       ret = inflate(&stream, Z_SYNC_FLUSH);
-                       SHA1_Update(&c, discard, sizeof(discard) -
-                                   stream.avail_out);
-               } while (stream.avail_in && ret == Z_OK);
-               
-       } while (ret == Z_OK);
+               *bufposn += size;
+       } while (1);
        inflateEnd(&stream);
 
        close(local);