* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
+#include <config.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
+#include <strings.h>
#include <errno.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
/** @cond PRIVATE */
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
- *
- * @since 0.3.0
*/
SR_PRIV int sr_atol(const char *str, long *ret)
{
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
- *
- * @since 0.3.0
*/
SR_PRIV int sr_atoi(const char *str, int *ret)
{
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
- *
- * @since 0.3.0
*/
SR_PRIV int sr_atod(const char *str, double *ret)
{
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
- *
- * @since 0.3.0
*/
SR_PRIV int sr_atof(const char *str, float *ret)
{
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
- *
- * @since 0.3.0
*/
SR_PRIV int sr_atof_ascii(const char *str, float *ret)
{
return SR_OK;
}
+/**
+ * Convert a string representation of a numeric value to a sr_rational.
+ *
+ * The conversion is strict and will fail if the complete string does not
+ * represent a valid number. The function sets errno according to the details
+ * of the failure. This version ignores the locale.
+ *
+ * @param str The string representation to convert.
+ * @param ret Pointer to sr_rational where the result of the conversion will be stored.
+ *
+ * @retval SR_OK Conversion successful.
+ * @retval SR_ERR Failure.
+ *
+ * @since 0.5.0
+ */
+SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
+{
+ char *endptr = NULL;
+ int64_t integral;
+ int64_t fractional = 0;
+ int64_t denominator = 1;
+ int32_t fractional_len = 0;
+ int32_t exponent = 0;
+
+ errno = 0;
+ integral = g_ascii_strtoll(str, &endptr, 10);
+
+ if (errno)
+ return SR_ERR;
+
+ if (*endptr == '.') {
+ const char* start = endptr + 1;
+ fractional = g_ascii_strtoll(start, &endptr, 10);
+ if (errno)
+ return SR_ERR;
+ fractional_len = endptr - start;
+ }
+
+ if ((*endptr == 'E') || (*endptr == 'e')) {
+ exponent = g_ascii_strtoll(endptr + 1, &endptr, 10);
+ if (errno)
+ return SR_ERR;
+ }
+
+ if (*endptr != '\0')
+ return SR_ERR;
+
+ for (int i = 0; i < fractional_len; i++)
+ integral *= 10;
+ exponent -= fractional_len;
+
+ if (integral >= 0)
+ integral += fractional;
+ else
+ integral -= fractional;
+
+ while (exponent > 0) {
+ integral *= 10;
+ exponent--;
+ }
+
+ while (exponent < 0) {
+ denominator *= 10;
+ exponent++;
+ }
+
+ ret->p = integral;
+ ret->q = denominator;
+
+ return SR_OK;
+}
+
/**
* Convert a numeric value value to its "natural" string representation
* in SI units.
* @param unit The unit to append to the string, or NULL if the string
* has no units.
*
- * @return A g_try_malloc()ed string representation of the samplerate value,
+ * @return A newly allocated string representation of the samplerate value,
* or NULL upon errors. The caller is responsible to g_free() the
* memory.
*
const char *p, prefix[] = "\0kMGTPE";
char fmt[16], fract[20] = "", *f;
- if (unit == NULL)
+ if (!unit)
unit = "";
for (i = 0; (quot = x / divisor[i]) >= 1000; i++);
*
* @param samplerate The samplerate in Hz.
*
- * @return A g_try_malloc()ed string representation of the samplerate value,
+ * @return A newly allocated string representation of the samplerate value,
* or NULL upon errors. The caller is responsible to g_free() the
* memory.
*
}
/**
- * Convert a numeric frequency value to the "natural" string representation
- * of its period.
+ * Convert a numeric period value to the "natural" string representation
+ * of its period value.
+ *
+ * The period is specified as a rational number's numerator and denominator.
*
- * E.g. a value of 3000000 would be converted to "3 us", 20000 to "50 ms".
+ * E.g. a pair of (1, 5) would be converted to "200 ms", (10, 100) to "100 ms".
*
- * @param frequency The frequency in Hz.
+ * @param v_p The period numerator.
+ * @param v_q The period denominator.
*
- * @return A g_try_malloc()ed string representation of the frequency value,
+ * @return A newly allocated string representation of the period value,
* or NULL upon errors. The caller is responsible to g_free() the
* memory.
*
- * @since 0.1.0
+ * @since 0.5.0
*/
-SR_API char *sr_period_string(uint64_t frequency)
+SR_API char *sr_period_string(uint64_t v_p, uint64_t v_q)
{
+ double freq, v;
char *o;
- int r;
-
- /* Allocate enough for a uint64_t as string + " ms". */
- if (!(o = g_try_malloc0(30 + 1))) {
- sr_err("%s: o malloc failed", __func__);
- return NULL;
+ int prec, r;
+
+ freq = 1 / ((double)v_p / v_q);
+
+ o = g_malloc0(30 + 1);
+
+ if (freq > SR_GHZ(1)) {
+ v = (double)v_p / v_q * 1000000000000.0;
+ prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
+ r = snprintf(o, 30, "%.*f ps", prec, v);
+ } else if (freq > SR_MHZ(1)) {
+ v = (double)v_p / v_q * 1000000000.0;
+ prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
+ r = snprintf(o, 30, "%.*f ns", prec, v);
+ } else if (freq > SR_KHZ(1)) {
+ v = (double)v_p / v_q * 1000000.0;
+ prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
+ r = snprintf(o, 30, "%.*f us", prec, v);
+ } else if (freq > 1) {
+ v = (double)v_p / v_q * 1000.0;
+ prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
+ r = snprintf(o, 30, "%.*f ms", prec, v);
+ } else {
+ v = (double)v_p / v_q;
+ prec = ((v - (uint64_t)v) < FLT_MIN) ? 0 : 3;
+ r = snprintf(o, 30, "%.*f s", prec, v);
}
- if (frequency >= SR_GHZ(1))
- r = snprintf(o, 30, "%" PRIu64 " ns", frequency / 1000000000);
- else if (frequency >= SR_MHZ(1))
- r = snprintf(o, 30, "%" PRIu64 " us", frequency / 1000000);
- else if (frequency >= SR_KHZ(1))
- r = snprintf(o, 30, "%" PRIu64 " ms", frequency / 1000);
- else
- r = snprintf(o, 30, "%" PRIu64 " s", frequency);
-
if (r < 0) {
/* Something went wrong... */
g_free(o);
* @param v_p The voltage numerator.
* @param v_q The voltage denominator.
*
- * @return A g_try_malloc()ed string representation of the voltage value,
+ * @return A newly allocated string representation of the voltage value,
* or NULL upon errors. The caller is responsible to g_free() the
* memory.
*
int r;
char *o;
- if (!(o = g_try_malloc0(30 + 1))) {
- sr_err("%s: o malloc failed", __func__);
- return NULL;
- }
+ o = g_malloc0(30 + 1);
if (v_q == 1000)
r = snprintf(o, 30, "%" PRIu64 "mV", v_p);
} else
*size += frac_part;
- if (*s && strcasecmp(s, "Hz"))
+ if (s && *s && g_ascii_strcasecmp(s, "Hz"))
return SR_ERR;
return SR_OK;
/** @since 0.1.0 */
SR_API gboolean sr_parse_boolstring(const char *boolstr)
{
- if (!boolstr)
- return FALSE;
+ /*
+ * Complete absence of an input spec is assumed to mean TRUE,
+ * as in command line option strings like this:
+ * ...:samplerate=100k:header:numchannels=4:...
+ */
+ if (!boolstr || !*boolstr)
+ return TRUE;
if (!g_ascii_strncasecmp(boolstr, "true", 4) ||
!g_ascii_strncasecmp(boolstr, "yes", 3) ||
if (s && *s) {
while (*s == ' ')
s++;
- if (!strcasecmp(s, "mv"))
+ if (!g_ascii_strcasecmp(s, "mv"))
*q = 1000L;
- else if (!strcasecmp(s, "v"))
+ else if (!g_ascii_strcasecmp(s, "v"))
*q = 1;
else
/* Must have a base suffix. */
projects / libsigrok.git / blobdiff