gbdev/rgbds
1
0
Fork 0
mirror of https://github.com/gbdev/rgbds.git synced 2026-06-10 02:32:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use templates to reduce the redundant number-lexing functions (#1963)

Browse Source
This commit is contained in:
Rangi
2026-05-21 17:13:09 -04:00
committed by GitHub
parent 1871b0a0b8
commit 48fcd9a0ca
8 changed files with 121 additions and 216 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/util.hpp
+29 -5
View File
@@ -29,10 +29,6 @@ bool isPrintable(int c);
bool isUpper(int c);
bool isLower(int c);
bool isLetter(int c);
bool isDigit(int c);
bool isBinDigit(int c);
bool isOctDigit(int c);
bool isHexDigit(int c);
bool isAlphanumeric(int c);
// Locale-independent character transform functions
@@ -42,7 +38,35 @@ char toUpper(char c);
bool startsIdentifier(int c);
bool continuesIdentifier(int c);
uint8_t parseHexDigit(int c);
template<uint32_t Base>
bool isDigit(int c) {
static_assert(Base <= 36, "Base must be 36 or less to allow digits 0-9A-Z");
if constexpr (Base <= 10) {
return c >= '0' && c < static_cast<int>('0' + Base);
} else {
return isDigit<10>(c) || (c >= 'A' && c < static_cast<int>('A' + Base - 10))
|| (c >= 'a' && c < static_cast<int>('a' + Base - 10));
}
}
template<uint32_t Base>
uint8_t parseDigit(int c) {
static_assert(Base <= 36, "Base must be 36 or less to allow digits 0-9A-Z");
assume(isDigit<Base>(c));
if constexpr (Base <= 10) {
return c - '0';
} else {
// Check digit ranges from greatest to least ('a'-'z', then 'A'-'Z', then '0'-'9')
if (c >= 'a') {
return c - 'a' + 10;
} else if (c >= 'A') {
return c - 'A' + 10;
} else {
return parseDigit<10>(c);
}
}
}
std::optional<uint64_t> parseNumber(char const *&str, NumberBase base = BASE_AUTO);
std::optional<uint64_t> parseWholeNumber(char const *str, NumberBase base = BASE_AUTO);