From: Jonathan Nieder <jrnieder@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: David Barr <david.barr@xxxxxxxxxxxx>
---
vcs-svn/line_buffer.c | 13 +++++++------
vcs-svn/line_buffer.h | 2 +-
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 6930aac..a78c5d8 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];
- off_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;
+ off_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 a090dd6..7d10f9c 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 e89cc41..4ef0755 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.
--
1.7.3.2.846.gf4b062
--
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