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| author |  Jonathan Nieder <jrnieder@gmail.com> | 2010-10-10 21:44:21 -0500 |
|---|---|---|
| committer | Jonathan Nieder <jrnieder@gmail.com> | 2011-03-22 16:39:54 -0500 |
| commit | d234f54b2f82067699f36593188e687fc7dc321a (patch) | |
| tree | 94fe162cfc9d0f44fae444061eadade2c02f5895 | |
| parent | vcs-svn: improve support for reading large files (diff) | |
| download | tgif-d234f54b2f82067699f36593188e687fc7dc321a.tar.xz | |
vcs-svn: make buffer_skip_bytes return length read
Currently there is no way to detect when input ended if it ended
early during buffer_skip_bytes. Tell the calling program how many
bytes were actually skipped for easier debugging.
Existing callers will still ignore early EOF.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
| -rw-r--r-- | vcs-svn/line_buffer.c | 13 | ||||
| -rw-r--r-- | vcs-svn/line_buffer.h | 2 | ||||
| -rw-r--r-- | vcs-svn/line_buffer.txt | 3 |
3 files changed, 10 insertions, 8 deletions
diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c index 747de07e6b..39d52b88b7 100644 --- a/vcs-svn/line_buffer.c +++ b/vcs-svn/line_buffer.c @@ -120,15 +120,16 @@ void buffer_copy_bytes(struct line_buffer *buf, off_t len) } } -void buffer_skip_bytes(struct line_buffer *buf, off_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) diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h index a090dd6874..7d10f9c751 100644 --- a/vcs-svn/line_buffer.h +++ b/vcs-svn/line_buffer.h @@ -27,6 +27,6 @@ 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); -void buffer_skip_bytes(struct line_buffer *buf, off_t len); +off_t buffer_skip_bytes(struct line_buffer *buf, off_t len); #endif diff --git a/vcs-svn/line_buffer.txt b/vcs-svn/line_buffer.txt index e89cc41d56..4ef0755cf5 100644 --- a/vcs-svn/line_buffer.txt +++ b/vcs-svn/line_buffer.txt @@ -76,7 +76,8 @@ Functions `buffer_skip_bytes`:: Discards `len` bytes from the input stream (stopping early - if necessary because of an error or eof). + if necessary because of an error or eof). Return value is + the number of bytes successfully read. `buffer_reset`:: Deallocates non-static buffers. |