*/
/* Needed for POSIX.1-2008 locale functions */
+/** @cond PRIVATE */
#define _XOPEN_SOURCE 700
+/** @endcond */
#include <config.h>
#include <ctype.h>
#include <locale.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
-#include <stdbool.h>
#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
*/
/**
- * @private
- *
* Convert a string representation of a numeric value (base 10) to a long integer. The
* conversion is strict and will fail if the complete string does not represent
* a valid long integer. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atol(const char *str, long *ret)
{
}
/**
+ * Convert a text to a number including support for non-decimal bases.
+ * Also optionally returns the position after the number, where callers
+ * can either error out, or support application specific suffixes.
+ *
+ * @param[in] str The input text to convert.
+ * @param[out] ret The conversion result.
+ * @param[out] end The position after the number.
+ * @param[in] base The number format's base, can be 0.
+ *
+ * @retval SR_OK Conversion successful.
+ * @retval SR_ERR Conversion failed.
+ *
+ * @private
+ *
+ * This routine is more general than @ref sr_atol(), which strictly
+ * expects the input text to contain just a decimal number, and nothing
+ * else in addition. The @ref sr_atol_base() routine accepts trailing
+ * text after the number, and supports non-decimal numbers (bin, hex),
+ * including automatic detection from prefix text.
+ */
+SR_PRIV int sr_atol_base(const char *str, long *ret, char **end, int base)
+{
+ long num;
+ char *endptr;
+
+ /* Add "0b" prefix support which strtol(3) may be missing. */
+ while (str && isspace(*str))
+ str++;
+ if (!base && strncmp(str, "0b", strlen("0b")) == 0) {
+ str += strlen("0b");
+ base = 2;
+ }
+
+ /* Run the number conversion. Quick bail out if that fails. */
+ errno = 0;
+ endptr = NULL;
+ num = strtol(str, &endptr, base);
+ if (!endptr || errno) {
+ if (!errno)
+ errno = EINVAL;
+ return SR_ERR;
+ }
+ *ret = num;
+
+ /* Advance to optional non-space trailing suffix. */
+ while (endptr && isspace(*endptr))
+ endptr++;
+ if (end)
+ *end = endptr;
+
+ return SR_OK;
+}
+
+/**
+ * Convert a text to a number including support for non-decimal bases.
+ * Also optionally returns the position after the number, where callers
+ * can either error out, or support application specific suffixes.
+ *
+ * @param[in] str The input text to convert.
+ * @param[out] ret The conversion result.
+ * @param[out] end The position after the number.
+ * @param[in] base The number format's base, can be 0.
+ *
+ * @retval SR_OK Conversion successful.
+ * @retval SR_ERR Conversion failed.
+ *
* @private
*
+ * This routine is more general than @ref sr_atol(), which strictly
+ * expects the input text to contain just a decimal number, and nothing
+ * else in addition. The @ref sr_atoul_base() routine accepts trailing
+ * text after the number, and supports non-decimal numbers (bin, hex),
+ * including automatic detection from prefix text.
+ */
+SR_PRIV int sr_atoul_base(const char *str, unsigned long *ret, char **end, int base)
+{
+ unsigned long num;
+ char *endptr;
+
+ /* Add "0b" prefix support which strtol(3) may be missing. */
+ while (str && isspace(*str))
+ str++;
+ if (!base && strncmp(str, "0b", strlen("0b")) == 0) {
+ str += strlen("0b");
+ base = 2;
+ }
+
+ /* Run the number conversion. Quick bail out if that fails. */
+ errno = 0;
+ endptr = NULL;
+ num = strtoul(str, &endptr, base);
+ if (!endptr || errno) {
+ if (!errno)
+ errno = EINVAL;
+ return SR_ERR;
+ }
+ *ret = num;
+
+ /* Advance to optional non-space trailing suffix. */
+ while (endptr && isspace(*endptr))
+ endptr++;
+ if (end)
+ *end = endptr;
+
+ return SR_OK;
+}
+
+/**
* Convert a string representation of a numeric value (base 10) to an integer. The
* conversion is strict and will fail if the complete string does not represent
* a valid integer. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atoi(const char *str, int *ret)
{
}
/**
- * @private
- *
* Convert a string representation of a numeric value to a double. The
* conversion is strict and will fail if the complete string does not represent
* a valid double. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atod(const char *str, double *ret)
{
}
/**
- * @private
- *
* Convert a string representation of a numeric value to a float. The
* conversion is strict and will fail if the complete string does not represent
* a valid float. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atof(const char *str, float *ret)
{
}
/**
- * @private
- *
* Convert a string representation of a numeric value to a double. The
* conversion is strict and will fail if the complete string does not represent
* a valid double. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atod_ascii(const char *str, double *ret)
{
}
/**
- * @private
+ * Convert text to a floating point value, and get its precision.
+ *
+ * @param[in] str The input text to convert.
+ * @param[out] ret The conversion result, a double precision float number.
+ * @param[out] digits The number of significant decimals.
+ *
+ * @returns SR_OK in case of successful text to number conversion.
+ * @returns SR_ERR when conversion fails.
*
+ * @since 0.6.0
+ */
+SR_PRIV int sr_atod_ascii_digits(const char *str, double *ret, int *digits)
+{
+ const char *p;
+ int *dig_ref, m_dig, exp;
+ char c;
+ double f;
+
+ /*
+ * Convert floating point text to the number value, _and_ get
+ * the value's precision in the process. Steps taken to do it:
+ * - Skip leading whitespace.
+ * - Count the number of decimals after the mantissa's period.
+ * - Get the exponent's signed value.
+ *
+ * This implementation still uses common code for the actual
+ * conversion, but "violates API layers" by duplicating the
+ * text scan, to get the number of significant digits.
+ */
+ p = str;
+ while (*p && isspace(*p))
+ p++;
+ if (*p == '-' || *p == '+')
+ p++;
+ m_dig = 0;
+ exp = 0;
+ dig_ref = NULL;
+ while (*p) {
+ c = *p++;
+ if (toupper(c) == 'E') {
+ exp = strtol(p, NULL, 10);
+ break;
+ }
+ if (c == '.') {
+ m_dig = 0;
+ dig_ref = &m_dig;
+ continue;
+ }
+ if (isdigit(c)) {
+ if (dig_ref)
+ (*dig_ref)++;
+ continue;
+ }
+ /* Need not warn, conversion will fail. */
+ break;
+ }
+ sr_spew("atod digits: txt \"%s\" -> m %d, e %d -> digits %d",
+ str, m_dig, exp, m_dig + -exp);
+ m_dig += -exp;
+
+ if (sr_atod_ascii(str, &f) != SR_OK)
+ return SR_ERR;
+ if (ret)
+ *ret = f;
+ if (digits)
+ *digits = m_dig;
+
+ return SR_OK;
+}
+
+/**
* Convert a string representation of a numeric value to a float. The
* conversion is strict and will fail if the complete string does not represent
* a valid float. The function sets errno according to the details of the
*
* @retval SR_OK Conversion successful.
* @retval SR_ERR Failure.
+ *
+ * @private
*/
SR_PRIV int sr_atof_ascii(const char *str, float *ret)
{
#endif
}
+/**
+ * Convert a sequence of bytes to its textual representation ("hex dump").
+ *
+ * Callers should free the allocated GString. See sr_hexdump_free().
+ *
+ * @param[in] data Pointer to the byte sequence to print.
+ * @param[in] len Number of bytes to print.
+ *
+ * @return NULL upon error, newly allocated GString pointer otherwise.
+ *
+ * @private
+ */
+SR_PRIV GString *sr_hexdump_new(const uint8_t *data, const size_t len)
+{
+ GString *s;
+ size_t i;
+
+ s = g_string_sized_new(3 * len);
+ for (i = 0; i < len; i++) {
+ if (i)
+ g_string_append_c(s, ' ');
+ g_string_append_printf(s, "%02x", data[i]);
+ }
+
+ return s;
+}
+
+/**
+ * Free a hex dump text that was created by sr_hexdump_new().
+ *
+ * @param[in] s Pointer to the GString to release.
+ *
+ * @private
+ */
+SR_PRIV void sr_hexdump_free(GString *s)
+{
+ if (s)
+ g_string_free(s, TRUE);
+}
+
/**
* Convert a string representation of a numeric value to a sr_rational.
*
int64_t denominator = 1;
int32_t fractional_len = 0;
int32_t exponent = 0;
- bool is_negative = false;
+ gboolean is_negative = FALSE;
+ gboolean no_integer, no_fractional;
+
+ while (isspace(*str))
+ str++;
errno = 0;
integral = g_ascii_strtoll(str, &endptr, 10);
- if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.')
+ if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.') {
endptr += 1;
- else if (str == endptr && str[0] == '.')
- /* EMPTY */;
- else if (errno)
+ no_integer = TRUE;
+ } else if (str == endptr && str[0] == '.') {
+ no_integer = TRUE;
+ } else if (errno) {
return SR_ERR;
+ } else {
+ no_integer = FALSE;
+ }
if (integral < 0 || str[0] == '-')
- is_negative = true;
+ is_negative = TRUE;
errno = 0;
if (*endptr == '.') {
+ gboolean is_exp, is_eos;
const char *start = endptr + 1;
fractional = g_ascii_strtoll(start, &endptr, 10);
+ is_exp = *endptr == 'E' || *endptr == 'e';
+ is_eos = *endptr == '\0';
+ if (endptr == start && (is_exp || is_eos)) {
+ fractional = 0;
+ errno = 0;
+ }
if (errno)
return SR_ERR;
+ no_fractional = endptr == start;
+ if (no_integer && no_fractional)
+ return SR_ERR;
fractional_len = endptr - start;
}
projects / libsigrok.git / blobdiff