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 LINE_BUFFER_LEN 10000
11 #define COPY_BUFFER_LEN 4096
13 static char line_buffer
[LINE_BUFFER_LEN
];
14 static struct strbuf blob_buffer
= STRBUF_INIT
;
17 int buffer_init(const char *filename
)
19 infile
= filename
? fopen(filename
, "r") : stdin
;
25 int buffer_deinit(void)
29 return ferror(infile
);
31 err
|= fclose(infile
);
35 /* Read a line without trailing newline. */
36 char *buffer_read_line(void)
39 if (!fgets(line_buffer
, sizeof(line_buffer
), infile
))
40 /* Error or data exhausted. */
42 end
= line_buffer
+ strlen(line_buffer
);
45 else if (feof(infile
))
46 ; /* No newline at end of file. That's fine. */
50 * There is probably a saner way to deal with this,
51 * but for now let's return an error.
57 char *buffer_read_string(uint32_t len
)
59 strbuf_reset(&blob_buffer
);
60 strbuf_fread(&blob_buffer
, len
, infile
);
61 return ferror(infile
) ? NULL
: blob_buffer
.buf
;
64 void buffer_copy_bytes(uint32_t len
)
66 char byte_buffer
[COPY_BUFFER_LEN
];
68 while (len
> 0 && !feof(infile
) && !ferror(infile
)) {
69 in
= len
< COPY_BUFFER_LEN
? len
: COPY_BUFFER_LEN
;
70 in
= fread(byte_buffer
, 1, in
, infile
);
72 fwrite(byte_buffer
, 1, in
, stdout
);
74 buffer_skip_bytes(len
);
80 void buffer_skip_bytes(uint32_t len
)
82 char byte_buffer
[COPY_BUFFER_LEN
];
84 while (len
> 0 && !feof(infile
) && !ferror(infile
)) {
85 in
= len
< COPY_BUFFER_LEN
? len
: COPY_BUFFER_LEN
;
86 in
= fread(byte_buffer
, 1, in
, infile
);
91 void buffer_reset(void)
93 strbuf_release(&blob_buffer
);