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- /** @file conv.c
- * @brief Functions to convert from string to integer.
- */
- #include <stdlib.h>
- #include <errno.h>
- #include <limits.h>
- #include "faux/conv.h"
- /** @brief Converts string to long int
- *
- * Converts string to long int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atol(const char *str, long int *val, int base) {
- char *endptr = NULL;
- long int res = 0;
- errno = 0; // man recommends to do so
- res = strtol(str, &endptr, base);
- // Check for overflow
- if (((LONG_MIN == res) || (LONG_MAX == res)) && (ERANGE == errno))
- return -1;
- // No valid digits at all
- if ((0 == res) && ((endptr == str) || (errno != 0)))
- return -1;
- *val = res;
- return 0;
- }
- /** @brief Converts string to unsigned long int
- *
- * Converts string to unsigned long int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoul(const char *str, unsigned long int *val, int base) {
- char *endptr = NULL;
- unsigned long int res = 0;
- errno = 0; // man recommends to do so
- res = strtoul(str, &endptr, base);
- // Check for overflow
- if ((ULONG_MAX == res) && (ERANGE == errno))
- return -1;
- // No valid digits at all
- if ((0 == res) && ((endptr == str) || (errno != 0)))
- return -1;
- *val = res;
- return 0;
- }
- /** @brief Converts string to long long int
- *
- * Converts string to long long int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoll(const char *str, long long int *val, int base) {
- char *endptr = NULL;
- long long int res = 0;
- errno = 0; // man recommends to do so
- res = strtoll(str, &endptr, base);
- // Check for overflow
- if (((LLONG_MIN == res) || (LLONG_MAX == res)) && (ERANGE == errno))
- return -1;
- // No valid digits at all
- if ((0 == res) && ((endptr == str) || (errno != 0)))
- return -1;
- *val = res;
- return 0;
- }
- /** @brief Converts string to unsigned long long int
- *
- * Converts string to unsigned long long int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoull(const char *str, unsigned long long int *val, int base) {
- char *endptr = NULL;
- unsigned long long int res = 0;
- errno = 0; // man recommends to do so
- res = strtoull(str, &endptr, base);
- // Check for overflow
- if ((ULLONG_MAX == res) && (ERANGE == errno))
- return -1;
- // No valid digits at all
- if ((0 == res) && ((endptr == str) || (errno != 0)))
- return -1;
- *val = res;
- return 0;
- }
- /** @brief Converts string to int
- *
- * Converts string to int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoi(const char *str, int *val, int base) {
- long int tmp = 0;
- // Use existent func. The long int is longer or equal to int.
- if (faux_conv_atol(str, &tmp, base) < 0)
- return -1;
- if ((tmp < INT_MIN) || (tmp > INT_MAX)) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
- /** @brief Converts string to unsigned int
- *
- * Converts string to unsigned int and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoui(const char *str, unsigned int *val, int base) {
- unsigned long int tmp = 0;
- // Use existent func. The long int is longer or equal to int.
- if (faux_conv_atoul(str, &tmp, base) < 0)
- return -1;
- if (tmp > UINT_MAX) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
- /** @brief Converts string to short
- *
- * Converts string to short and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atos(const char *str, short *val, int base)
- {
- long int tmp = 0;
- if (faux_conv_atol(str, &tmp, base) < 0)
- return -1;
- if ((tmp < SHRT_MIN) || (tmp > SHRT_MAX)) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
- /** @brief Converts string to unsigned short
- *
- * Converts string to unsigned short and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atous(const char *str, unsigned short *val, int base)
- {
- unsigned long int tmp = 0;
- if (faux_conv_atoul(str, &tmp, base) < 0)
- return -1;
- if (tmp > USHRT_MAX) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
- /** @brief Converts string to char
- *
- * Converts string to char and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atoc(const char *str, char *val, int base)
- {
- long int tmp = 0;
- if (faux_conv_atol(str, &tmp, base) < 0)
- return -1;
- if ((tmp < CHAR_MIN) || (tmp > CHAR_MAX)) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
- /** @brief Converts string to unsigned char
- *
- * Converts string to unsigned char and check for overflow and valid
- * input values. Function indicates error by return value. It
- * returns the convertion result by second argument.
- *
- * @param [in] str Input string to convert.
- * @param [out] val Pointer to result value.
- * @param [in] base Base to convert.
- * @return 0 - success, < 0 - error
- */
- int faux_conv_atouc(const char *str, unsigned char *val, int base)
- {
- unsigned long int tmp = 0;
- if (faux_conv_atoul(str, &tmp, base) < 0)
- return -1;
- if (tmp > UCHAR_MAX) // Overflow
- return -1;
- *val = tmp;
- return 0;
- }
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