vcs-svn: make buffer_read_binary API more convenient

buffer_read_binary is a thin wrapper around fread, but its signature
is wrong:

- fread can fill an arbitrary in-memory buffer.  buffer_read_binary
is limited to buffers whose size is representable by a 32-bit
integer.
- The result from fread is the number of bytes actually read.
buffer_read_binary only reports the number of bytes read by
incrementing sb->len by that amount and returns void.

Fix both: let buffer_read_binary accept a size_t instead of uint32_t
for the number of bytes to read and as a convenience return the number
of bytes actually read.

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>

diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
index c39038723ed4a90f99f70a694eae58ba488556b6..01fcb842f1dcc27517109f0d317a239d3493dc4a 100644 (file)
--- a/vcs-svn/line_buffer.c
+++ b/vcs-svn/line_buffer.c
@@ -91,10 +91,10 @@ char *buffer_read_line(struct line_buffer *buf)
        return buf->line_buffer;
 }
 
        return buf->line_buffer;
 }
 

-void buffer_read_binary(struct line_buffer *buf,
-                               struct strbuf *sb, uint32_t size)
+size_t buffer_read_binary(struct line_buffer *buf,
+                               struct strbuf *sb, size_t size)

 {
 {

-       strbuf_fread(sb, size, buf->infile);
+       return strbuf_fread(sb, size, buf->infile);

 }
 
 off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
 }
 
 off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)

diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h
index d0b22dda76e8a193f15fa5483abd217cdde101da..8901f214bafce3917025721137a85d827cd1c1a6 100644 (file)
--- a/vcs-svn/line_buffer.h
+++ b/vcs-svn/line_buffer.h
@@ -23,7 +23,7 @@ long buffer_tmpfile_prepare_to_read(struct line_buffer *buf);
 int buffer_ferror(struct line_buffer *buf);
 char *buffer_read_line(struct line_buffer *buf);
 int buffer_read_char(struct line_buffer *buf);
 int buffer_ferror(struct line_buffer *buf);
 char *buffer_read_line(struct line_buffer *buf);
 int buffer_read_char(struct line_buffer *buf);

-void buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, uint32_t len);
+size_t buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, size_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);
 /* 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);