From: Jonathan Nieder <jrnieder@xxxxxxxxx>
Currently buffer_copy_bytes does not report to its caller whether
it encountered an early end of file.
Add a return value representing the number of bytes read (but not
the number of bytes copied). This way all three unusual conditions
can be distinguished: input error with buffer_ferror, output error
with ferror(outfile), early end of input by checking the return
value.
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Signed-off-by: David Barr <david.barr@xxxxxxxxxxxx>
---
vcs-svn/line_buffer.c | 18 +++++++++---------
vcs-svn/line_buffer.h | 3 ++-
2 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
index a78c5d8..08d7cae 100644
--- a/vcs-svn/line_buffer.c
+++ b/vcs-svn/line_buffer.c
@@ -104,20 +104,20 @@ void buffer_read_binary(struct line_buffer *buf,
strbuf_fread(sb, size, buf->infile);
}
-void buffer_copy_bytes(struct line_buffer *buf, off_t len)
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
{
char byte_buffer[COPY_BUFFER_LEN];
- off_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;
+ off_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;
}
off_t buffer_skip_bytes(struct line_buffer *buf, off_t nbytes)
diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h
index 7d10f9c..f5c468a 100644
--- a/vcs-svn/line_buffer.h
+++ b/vcs-svn/line_buffer.h
@@ -26,7 +26,8 @@ char *buffer_read_line(struct line_buffer *buf);
char *buffer_read_string(struct line_buffer *buf, uint32_t len);
int buffer_read_char(struct line_buffer *buf);
void buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, uint32_t len);
-void buffer_copy_bytes(struct line_buffer *buf, off_t len);
+/* Returns number of bytes read (not necessarily written). */
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t len);
off_t buffer_skip_bytes(struct line_buffer *buf, off_t len);
#endif
--
1.7.3.2.846.gf4b062
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html