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-rw-r--r--src/openvic/utility/StringUtils.hpp88
1 files changed, 61 insertions, 27 deletions
diff --git a/src/openvic/utility/StringUtils.hpp b/src/openvic/utility/StringUtils.hpp
index 72f4038..5d6001c 100644
--- a/src/openvic/utility/StringUtils.hpp
+++ b/src/openvic/utility/StringUtils.hpp
@@ -1,16 +1,17 @@
#include <cstdint>
#include <limits>
+#include <string_view>
namespace OpenVic::StringUtils {
- /* The constexpr function 'string_to_int64' will convert a string into a int64 integer value.
- * The function takes four parameters: the input string (as a pair of pointers marking the start and
- * end of the string), a bool pointer for reporting success, and the base for numerical conversion.
- * The base parameter defaults to 10 (decimal), but it can be any value between 2 and 36. If the base
- * given is 0, it will be set to 16 if the string starts with "0x" or "0X", otherwise 8 if the string
- * still starts with "0", otherwise 10. The success bool pointer parameter is used to report whether
- * or not conversion was successful. It can be nullptr if this information is not needed.
- */
- constexpr int64_t string_to_int64(char const* str, const char* end, bool* successful, int base = 10) {
+ /* The constexpr function 'string_to_uint64' will convert a string into a uint64_t integer value.
+ * The function takes four parameters: the input string (as a pair of pointers marking the start and
+ * end of the string), a bool pointer for reporting success, and the base for numerical conversion.
+ * The base parameter defaults to 10 (decimal), but it can be any value between 2 and 36. If the base
+ * given is 0, it will be set to 16 if the string starts with "0x" or "0X", otherwise 8 if the string
+ * still starts with "0", otherwise 10. The success bool pointer parameter is used to report whether
+ * or not conversion was successful. It can be nullptr if this information is not needed.
+ */
+ constexpr uint64_t string_to_uint64(char const* str, const char* const end, bool* successful = nullptr, int base = 10) {
if (successful != nullptr) *successful = false;
// Base value should be between 2 and 36. If it's not, return 0 as an invalid case.
@@ -18,24 +19,14 @@ namespace OpenVic::StringUtils {
return 0;
// The result of the conversion will be stored in this variable.
- int64_t result = 0;
- // This flag will be set if the number is negative.
- bool is_negative = false;
-
- // Check if there is a sign character.
- if (*str == '+' || *str == '-') {
- if (*str == '-')
- is_negative = true;
- ++str;
- if (str == end) return 0;
- }
+ uint64_t result = 0;
// If base is zero, base is determined by the string prefix.
if (base == 0) {
if (*str == '0') {
if (str + 1 != end && (str[1] == 'x' || str[1] == 'X')) {
base = 16; // Hexadecimal.
- str += 2; // Skip '0x' or '0X'
+ str += 2; // Skip '0x' or '0X'
if (str == end) return 0;
} else {
base = 8; // Octal.
@@ -69,15 +60,15 @@ namespace OpenVic::StringUtils {
}
// Check for overflow on multiplication
- if (result > std::numeric_limits<int64_t>::max() / base) {
- return is_negative ? std::numeric_limits<int64_t>::min() : std::numeric_limits<int64_t>::max();
+ if (result > std::numeric_limits<uint64_t>::max() / base) {
+ return std::numeric_limits<uint64_t>::max();
}
result *= base;
// Check for overflow on addition
- if (result > std::numeric_limits<int64_t>::max() - digit) {
- return is_negative ? std::numeric_limits<int64_t>::min() : std::numeric_limits<int64_t>::max();
+ if (result > std::numeric_limits<uint64_t>::max() - digit) {
+ return std::numeric_limits<uint64_t>::max();
}
result += digit;
@@ -87,7 +78,50 @@ namespace OpenVic::StringUtils {
// set *successful to true (if not it is already false).
if (successful != nullptr && str == end) *successful = true;
- // Return the result. If the number was negative, the result is negated.
- return is_negative ? -result : result;
+ return result;
+ }
+
+ constexpr uint64_t string_to_uint64(char const* str, size_t length, bool* successful = nullptr, int base = 10) {
+ return string_to_uint64(str, str + length, successful, base);
+ }
+
+ inline uint64_t string_to_uint64(const std::string_view str, bool* successful = nullptr, int base = 10) {
+ return string_to_uint64(str.data(), str.length(), successful, base);
+ }
+
+ constexpr int64_t string_to_int64(char const* str, const char* const end, bool* successful = nullptr, int base = 10) {
+ if (successful != nullptr) *successful = false;
+
+ if (str == nullptr || end <= str) return 0;
+
+ // This flag will be set if the number is negative.
+ bool is_negative = false;
+
+ // Check if there is a sign character.
+ if (*str == '+' || *str == '-') {
+ if (*str == '-')
+ is_negative = true;
+ ++str;
+ if (str == end) return 0;
+ }
+
+ const uint64_t result = string_to_uint64(str, end, successful, base);
+ if (!is_negative) {
+ if (result >= std::numeric_limits<int64_t>::max())
+ return std::numeric_limits<int64_t>::max();
+ return result;
+ } else {
+ if (result > std::numeric_limits<int64_t>::max())
+ return std::numeric_limits<int64_t>::min();
+ return -result;
+ }
+ }
+
+ constexpr int64_t string_to_int64(char const* str, size_t length, bool* successful = nullptr, int base = 10) {
+ return string_to_int64(str, str + length, successful, base);
+ }
+
+ inline int64_t string_to_int64(const std::string_view str, bool* successful = nullptr, int base = 10) {
+ return string_to_int64(str.data(), str.length(), successful, base);
}
}