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input/csv: Improve readability (bool expr vs assign, nested arrays) 

Move variable assignments out of boolean condition checks. Factor out
repeated access to nested arrays. This shall improve readability.
This commit is contained in:
Gerhard Sittig 2017-06-05 13:02:31 +02:00 committed by Uwe Hermann
parent b4698e4d61
commit df0db9fdda
1 changed files with 33 additions and 21 deletions
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54
src/input/csv.c
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@ -313,20 +313,22 @@ static char **parse_line(char *buf, struct context *inc, int max_columns)
static int parse_multi_columns(char **columns, struct context *inc)
{
gsize i;
char *column;
/* Clear buffer in order to set bits only. */
memset(inc->sample_buffer, 0, (inc->num_channels + 7) >> 3);
for (i = 0; i < inc->num_channels; i++) {
if (columns[i][0] == '1') {
column = columns[i];
if (column[0] == '1') {
inc->sample_buffer[i / 8] |= (1 << (i % 8));
} else if (!strlen(columns[i])) {
} else if (!strlen(column)) {
sr_err("Column %zu in line %zu is empty.",
inc->first_channel + i, inc->line_number);
return SR_ERR;
} else if (columns[i][0] != '0') {
} else if (column[0] != '0') {
sr_err("Invalid value '%s' in column %zu in line %zu.",
columns[i], inc->first_channel + i,
column, inc->first_channel + i,
inc->line_number);
return SR_ERR;
}
@ -371,7 +373,8 @@ static int send_samples(const struct sr_dev_inst *sdi, uint8_t *buffer,
logic.data = buffer;
for (i = 0; i < count; i++) {
if ((res = sr_session_send(sdi, &packet)) != SR_OK)
res = sr_session_send(sdi, &packet);
if (res != SR_OK)
return res;
}
@ -466,7 +469,7 @@ static int initial_parse(const struct sr_input *in, GString *buf)
unsigned int num_columns, i;
size_t line_number, l;
int ret;
char **lines, **columns;
char **lines, *line, **columns, *column;
ret = SR_OK;
inc = in->priv;
@ -476,16 +479,17 @@ static int initial_parse(const struct sr_input *in, GString *buf)
lines = g_strsplit_set(buf->str, "\r\n", 0);
for (l = 0; lines[l]; l++) {
line_number++;
line = lines[l];
if (inc->start_line > line_number) {
sr_spew("Line %zu skipped.", line_number);
continue;
}
if (lines[l][0] == '\0') {
if (line[0] == '\0') {
sr_spew("Blank line %zu skipped.", line_number);
continue;
}
strip_comment(lines[l], inc->comment);
if (lines[l][0] == '\0') {
strip_comment(line, inc->comment);
if (line[0] == '\0') {
sr_spew("Comment-only line %zu skipped.", line_number);
continue;
}
@ -503,7 +507,8 @@ static int initial_parse(const struct sr_input *in, GString *buf)
* In order to determine the number of columns parse the current line
* without limiting the number of columns.
*/
if (!(columns = parse_line(lines[l], inc, -1))) {
columns = parse_line(line, inc, -1);
if (!columns) {
sr_err("Error while parsing line %zu.", line_number);
ret = SR_ERR;
goto out;
@ -543,8 +548,9 @@ static int initial_parse(const struct sr_input *in, GString *buf)
channel_name = g_string_sized_new(64);
for (i = 0; i < inc->num_channels; i++) {
if (inc->header && inc->multi_column_mode && columns[i][0] != '\0')
g_string_assign(channel_name, columns[i]);
column = columns[i];
if (inc->header && inc->multi_column_mode && column[0] != '\0')
g_string_assign(channel_name, column);
else
g_string_printf(channel_name, "%u", i);
sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_name->str);
@ -576,11 +582,13 @@ static int initial_receive(const struct sr_input *in)
inc = in->priv;
if (!(termination = get_line_termination(in->buf)))
termination = get_line_termination(in->buf);
if (!termination)
/* Don't have a full line yet. */
return SR_ERR_NA;
if (!(p = g_strrstr_len(in->buf->str, in->buf->len, termination)))
p = g_strrstr_len(in->buf->str, in->buf->len, termination);
if (!p)
/* Don't have a full line yet. */
return SR_ERR_NA;
len = p - in->buf->str - 1;
@ -608,7 +616,7 @@ static int process_buffer(struct sr_input *in)
gsize num_columns;
uint64_t samplerate;
int max_columns, ret, l;
char *p, **lines, **columns;
char *p, **lines, *line, **columns;
inc = in->priv;
if (!inc->started) {
@ -628,7 +636,8 @@ static int process_buffer(struct sr_input *in)
inc->started = TRUE;
}
if (!(p = g_strrstr_len(in->buf->str, in->buf->len, inc->termination)))
p = g_strrstr_len(in->buf->str, in->buf->len, inc->termination);
if (!p)
/* Don't have a full line. */
return SR_ERR;
@ -645,14 +654,15 @@ static int process_buffer(struct sr_input *in)
lines = g_strsplit_set(in->buf->str, "\r\n", 0);
for (l = 0; lines[l]; l++) {
inc->line_number++;
if (lines[l][0] == '\0') {
line = lines[l];
if (line[0] == '\0') {
sr_spew("Blank line %zu skipped.", inc->line_number);
continue;
}
/* Remove trailing comment. */
strip_comment(lines[l], inc->comment);
if (lines[l][0] == '\0') {
strip_comment(line, inc->comment);
if (line[0] == '\0') {
sr_spew("Comment-only line %zu skipped.", inc->line_number);
continue;
}
@ -664,7 +674,8 @@ static int process_buffer(struct sr_input *in)
continue;
}
if (!(columns = parse_line(lines[l], inc, max_columns))) {
columns = parse_line(line, inc, max_columns);
if (!columns) {
sr_err("Error while parsing line %zu.", inc->line_number);
return SR_ERR;
}
@ -719,7 +730,8 @@ static int receive(struct sr_input *in, GString *buf)
inc = in->priv;
if (!inc->termination) {
if ((ret = initial_receive(in)) == SR_ERR_NA)
ret = initial_receive(in);
if (ret == SR_ERR_NA)
/* Not enough data yet. */
return SR_OK;
else if (ret != SR_OK)