#include "git-compat-util.h"
#include "line_buffer.h"
-#include "obj_pool.h"
+#include "strbuf.h"
-#define LINE_BUFFER_LEN 10000
#define COPY_BUFFER_LEN 4096
-/* Create memory pool for char sequence of known length */
-obj_pool_gen(blob, char, 4096)
+int buffer_init(struct line_buffer *buf, const char *filename)
+{
+ buf->infile = filename ? fopen(filename, "r") : stdin;
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
-static char line_buffer[LINE_BUFFER_LEN];
-static char byte_buffer[COPY_BUFFER_LEN];
-static FILE *infile;
+int buffer_fdinit(struct line_buffer *buf, int fd)
+{
+ buf->infile = fdopen(fd, "r");
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
-int buffer_init(const char *filename)
+int buffer_tmpfile_init(struct line_buffer *buf)
{
- infile = filename ? fopen(filename, "r") : stdin;
- if (!infile)
+ buf->infile = tmpfile();
+ if (!buf->infile)
return -1;
return 0;
}
-int buffer_deinit(void)
+int buffer_deinit(struct line_buffer *buf)
{
int err;
- if (infile == stdin)
- return ferror(infile);
- err = ferror(infile);
- err |= fclose(infile);
+ if (buf->infile == stdin)
+ return ferror(buf->infile);
+ err = ferror(buf->infile);
+ err |= fclose(buf->infile);
return err;
}
+FILE *buffer_tmpfile_rewind(struct line_buffer *buf)
+{
+ rewind(buf->infile);
+ return buf->infile;
+}
+
+long buffer_tmpfile_prepare_to_read(struct line_buffer *buf)
+{
+ long pos = ftell(buf->infile);
+ if (pos < 0)
+ return error("ftell error: %s", strerror(errno));
+ if (fseek(buf->infile, 0, SEEK_SET))
+ return error("seek error: %s", strerror(errno));
+ return pos;
+}
+
+int buffer_ferror(struct line_buffer *buf)
+{
+ return ferror(buf->infile);
+}
+
+int buffer_read_char(struct line_buffer *buf)
+{
+ return fgetc(buf->infile);
+}
+
/* Read a line without trailing newline. */
-char *buffer_read_line(void)
+char *buffer_read_line(struct line_buffer *buf)
{
char *end;
- if (!fgets(line_buffer, sizeof(line_buffer), infile))
+ if (!fgets(buf->line_buffer, sizeof(buf->line_buffer), buf->infile))
/* Error or data exhausted. */
return NULL;
- end = line_buffer + strlen(line_buffer);
+ end = buf->line_buffer + strlen(buf->line_buffer);
if (end[-1] == '\n')
end[-1] = '\0';
- else if (feof(infile))
+ else if (feof(buf->infile))
; /* No newline at end of file. That's fine. */
else
/*
* but for now let's return an error.
*/
return NULL;
- return line_buffer;
+ return buf->line_buffer;
}
-char *buffer_read_string(uint32_t len)
+void buffer_read_binary(struct line_buffer *buf,
+ struct strbuf *sb, uint32_t size)
{
- char *s;
- blob_free(blob_pool.size);
- s = blob_pointer(blob_alloc(len + 1));
- s[fread(s, 1, len, infile)] = '\0';
- return ferror(infile) ? NULL : s;
+ strbuf_fread(sb, size, buf->infile);
}
-void buffer_copy_bytes(uint32_t len)
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
{
- uint32_t in;
- while (len > 0 && !feof(infile) && !ferror(infile)) {
- in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
- in = fread(byte_buffer, 1, in, infile);
- len -= in;
+ char byte_buffer[COPY_BUFFER_LEN];
+ 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;
+ in = fread(byte_buffer, 1, in, buf->infile);
+ done += in;
fwrite(byte_buffer, 1, in, stdout);
- if (ferror(stdout)) {
- buffer_skip_bytes(len);
- return;
- }
+ if (ferror(stdout))
+ return done + buffer_skip_bytes(buf, nbytes - done);
}
+ return done;
}
-void buffer_skip_bytes(uint32_t len)
+off_t buffer_skip_bytes(struct line_buffer *buf, off_t nbytes)
{
- uint32_t in;
- while (len > 0 && !feof(infile) && !ferror(infile)) {
- in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
- in = fread(byte_buffer, 1, in, infile);
- len -= in;
+ char byte_buffer[COPY_BUFFER_LEN];
+ 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(void)
+void buffer_reset(struct line_buffer *buf)
{
- blob_reset();
}