qh_str_to_int32()

Safely converts a string into an int32_t

Synopsis:

#include <qh/string.h>

int qh_str_to_int32(const char *str,
                    int base,
                    int32_t *number,
                    size_t *end_offset)

Arguments:

str: The string to convert into a number.
base: The base of the number to parse.
number: Pointer to the location where the number can be stored.
end_offset: The offset where parsing stopped.

Library:

Description:

This function is similar to strtoll(), but does more error checking on the result of the conversion and ensures that the result fits in an int32_t. This simplifies the work the caller is required to do, which is only to validate that the return value from qh_str_to_int32() is EOK.

For conversion of strings that are part of a longer one (e.g., a comma-separated list), an optional end_offset parameter can be specified. When you specify end_offset, the function returns successfully even if there are trailing characters. When non-NULL, end_offset is always updated with the offset of the last character the function parsed. When NULL, the function treats trailing characters as invalid, except for characters recognized by isspace().

For more information on using this function, see the documentation for strtoll().

Returns:

EOK on success or a standard errno on failure (errno is also set, and number isn't updated except for ERANGE).

ERANGE: The number value is either smaller than INT32_MIN (and INT32_MIN is returned) or larger than INT32_MAX (and INT32_MAX is returned).