2 * Licensed under a two-clause BSD-style license.
3 * See LICENSE for details.
6 #include "git-compat-util.h"
7 #include "line_buffer.h"
10 #define COPY_BUFFER_LEN 4096
11 static struct line_buffer buf_
= LINE_BUFFER_INIT
;
12 static struct line_buffer
*buf
;
14 int buffer_init(const char *filename
)
18 buf
->infile
= filename
? fopen(filename
, "r") : stdin
;
24 int buffer_deinit(void)
27 if (buf
->infile
== stdin
)
28 return ferror(buf
->infile
);
29 err
= ferror(buf
->infile
);
30 err
|= fclose(buf
->infile
);
34 /* Read a line without trailing newline. */
35 char *buffer_read_line(void)
38 if (!fgets(buf
->line_buffer
, sizeof(buf
->line_buffer
), buf
->infile
))
39 /* Error or data exhausted. */
41 end
= buf
->line_buffer
+ strlen(buf
->line_buffer
);
44 else if (feof(buf
->infile
))
45 ; /* No newline at end of file. That's fine. */
49 * There is probably a saner way to deal with this,
50 * but for now let's return an error.
53 return buf
->line_buffer
;
56 char *buffer_read_string(uint32_t len
)
58 strbuf_reset(&buf
->blob_buffer
);
59 strbuf_fread(&buf
->blob_buffer
, len
, buf
->infile
);
60 return ferror(buf
->infile
) ? NULL
: buf
->blob_buffer
.buf
;
63 void buffer_copy_bytes(uint32_t len
)
65 char byte_buffer
[COPY_BUFFER_LEN
];
67 while (len
> 0 && !feof(buf
->infile
) && !ferror(buf
->infile
)) {
68 in
= len
< COPY_BUFFER_LEN
? len
: COPY_BUFFER_LEN
;
69 in
= fread(byte_buffer
, 1, in
, buf
->infile
);
71 fwrite(byte_buffer
, 1, in
, stdout
);
73 buffer_skip_bytes(len
);
79 void buffer_skip_bytes(uint32_t len
)
81 char byte_buffer
[COPY_BUFFER_LEN
];
83 while (len
> 0 && !feof(buf
->infile
) && !ferror(buf
->infile
)) {
84 in
= len
< COPY_BUFFER_LEN
? len
: COPY_BUFFER_LEN
;
85 in
= fread(byte_buffer
, 1, in
, buf
->infile
);
90 void buffer_reset(void)
92 strbuf_release(&buf
->blob_buffer
);