gbdev/rgbds
1
0
Fork 0
mirror of https://github.com/gbdev/rgbds.git synced 2025-11-20 10:12:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

Factor out an UpperMap for case-insensitive matching

Browse Source
This commit is contained in:
Rangi42
2025-07-27 23:14:52 -04:00
parent d16751f56a
commit 75aed1afd5
8 changed files with 87 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/asm/lexer.cpp
View File

@@ -5,7 +5,6 @@
#include <sys/types.h>
#include <algorithm>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
@@ -115,28 +114,9 @@ struct Token {
Token(int type_, std::string &&value_) : type(type_), value(value_) {}
};
struct CaseInsensitive {
// FNV-1a hash of an uppercased string
size_t operator()(std::string const &str) const {
size_t hash = 0x811C9DC5;
for (char const &c : str) {
hash = (hash ^ toupper(c)) * 16777619;
}
return hash;
}
// Compare two strings without case-sensitivity (by converting to uppercase)
bool operator()(std::string const &str1, std::string const &str2) const {
return std::equal(RANGE(str1), RANGE(str2), [](char c1, char c2) {
return toupper(c1) == toupper(c2);
});
}
};
// This map lists all RGBASM keywords which `yylex_NORMAL` lexes as identifiers.
// All non-identifier tokens are lexed separately.
static std::unordered_map<std::string, int, CaseInsensitive, CaseInsensitive> keywordDict = {
static UpperMap<int> const keywordDict{
{"ADC", T_(SM83_ADC) },
{"ADD", T_(SM83_ADD) },
{"AND", T_(SM83_AND) },