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lib/crc: Factor out reading a single CRC value

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Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
This commit is contained in:
Damien Lespiau 2014-02-06 16:17:14 +00:00
parent 162914b9ed
commit 7d0e2f618c
1 changed files with 16 additions and 7 deletions
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23
lib/igt_debugfs.c
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@ -301,6 +301,21 @@ static bool pipe_crc_init_from_string(igt_crc_t *crc, const char *line)
return n == 6;
}
static bool read_one_crc(igt_pipe_crc_t *pipe_crc, igt_crc_t *out)
{
ssize_t bytes_read;
char buf[pipe_crc->buffer_len];
bytes_read = read(pipe_crc->crc_fd, &buf, pipe_crc->line_len);
igt_assert_cmpint(bytes_read, ==, pipe_crc->line_len);
buf[bytes_read] = '\0';
if (!pipe_crc_init_from_string(out, buf))
return false;
return true;
}
/*
* Read @n_crcs from the @pipe_crc. This function blocks until @n_crcs are
* retrieved.
@ -309,9 +324,7 @@ void
igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
igt_crc_t **out_crcs)
{
ssize_t bytes_read;
igt_crc_t *crcs;
char buf[pipe_crc->buffer_len];
int n = 0;
crcs = calloc(n_crcs, sizeof(igt_crc_t));
@ -319,11 +332,7 @@ igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
do {
igt_crc_t *crc = &crcs[n];
bytes_read = read(pipe_crc->crc_fd, &buf, pipe_crc->line_len);
igt_assert_cmpint(bytes_read, ==, pipe_crc->line_len);
buf[bytes_read] = '\0';
if (!pipe_crc_init_from_string(crc, buf))
if (!read_one_crc(pipe_crc, crc))
continue;
n++;