Merge branch 'svn-fe' of git://repo.or.cz/git/jrn

[git.git] / vcs-svn / line_buffer.c

diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
index e29a81a536de5a6e68a5b434a330f23a96f304bb..33e733a04c2b694a7dce80c8404edd464fe1a6b7 100644 (file)
--- a/vcs-svn/line_buffer.c
+++ b/vcs-svn/line_buffer.c
@@ -25,6 +25,14 @@ int buffer_fdinit(struct line_buffer *buf, int fd)
        return 0;
 }
 
+int buffer_tmpfile_init(struct line_buffer *buf)
+{
+       buf->infile = tmpfile();
+       if (!buf->infile)
+               return -1;
+       return 0;
+}
+
 int buffer_deinit(struct line_buffer *buf)
 {
        int err;
@@ -35,6 +43,27 @@ int buffer_deinit(struct line_buffer *buf)
        return err;
 }
 
+FILE *buffer_tmpfile_rewind(struct line_buffer *buf)
+{
+       rewind(buf->infile);
+       return buf->infile;
+}
+
+long buffer_tmpfile_prepare_to_read(struct line_buffer *buf)
+{
+       long pos = ftell(buf->infile);
+       if (pos < 0)
+               return error("ftell error: %s", strerror(errno));
+       if (fseek(buf->infile, 0, SEEK_SET))
+               return error("seek error: %s", strerror(errno));
+       return pos;
+}
+
+int buffer_ferror(struct line_buffer *buf)
+{
+       return ferror(buf->infile);
+}
+
 int buffer_read_char(struct line_buffer *buf)
 {
        return fgetc(buf->infile);
@@ -75,31 +104,32 @@ void buffer_read_binary(struct line_buffer *buf,
        strbuf_fread(sb, size, buf->infile);
 }
 
-void buffer_copy_bytes(struct line_buffer *buf, uint32_t len)
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
 {
        char byte_buffer[COPY_BUFFER_LEN];
-       uint32_t in;
-       while (len > 0 && !feof(buf->infile) && !ferror(buf->infile)) {
-               in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
+       off_t done = 0;
+       while (done < nbytes && !feof(buf->infile) && !ferror(buf->infile)) {
+               off_t len = nbytes - done;
+               size_t in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
                in = fread(byte_buffer, 1, in, buf->infile);
-               len -= in;
+               done += in;
                fwrite(byte_buffer, 1, in, stdout);
-               if (ferror(stdout)) {
-                       buffer_skip_bytes(buf, len);
-                       return;
-               }
+               if (ferror(stdout))
+                       return done + buffer_skip_bytes(buf, nbytes - done);
        }
+       return done;
 }
 
-void buffer_skip_bytes(struct line_buffer *buf, uint32_t len)
+off_t buffer_skip_bytes(struct line_buffer *buf, off_t nbytes)
 {
        char byte_buffer[COPY_BUFFER_LEN];
-       uint32_t in;
-       while (len > 0 && !feof(buf->infile) && !ferror(buf->infile)) {
-               in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
-               in = fread(byte_buffer, 1, in, buf->infile);
-               len -= in;
+       off_t done = 0;
+       while (done < nbytes && !feof(buf->infile) && !ferror(buf->infile)) {
+               off_t len = nbytes - done;
+               size_t in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
+               done += fread(byte_buffer, 1, in, buf->infile);
        }
+       return done;
 }
 
 void buffer_reset(struct line_buffer *buf)