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Implement a new StringInterner

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This commit is contained in:
gingerBill
2026-03-17 09:18:39 +00:00
parent 8f2fd4f886
commit a8c6ea7c8a
6 changed files with 338 additions and 61 deletions
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43
src/common.cpp
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@@ -366,6 +366,7 @@ gb_global bool global_module_path_set = false;
#include "string_set.cpp"
#include "priority_queue.cpp"
#include "thread_pool.cpp"
#include "string_interner.cpp"
gb_internal String obfuscate_string(String const &s, char const *prefix) {
@@ -388,48 +389,6 @@ gb_internal i32 obfuscate_i32(i32 i) {
}
struct StringIntern {
StringIntern *next;
isize len;
char str[1];
};
PtrMap<uintptr, StringIntern *> string_intern_map = {}; // Key: u64
gb_global Arena string_intern_arena = {};
gb_internal char const *string_intern(char const *text, isize len) {
u64 hash = gb_fnv64a(text, len);
uintptr key = cast(uintptr)(hash ? hash : 1);
StringIntern **found = map_get(&string_intern_map, key);
if (found) {
for (StringIntern *it = *found; it != nullptr; it = it->next) {
if (it->len == len && gb_strncmp(it->str, (char *)text, len) == 0) {
return it->str;
}
}
}
StringIntern *new_intern = cast(StringIntern *)arena_alloc(&string_intern_arena, gb_offset_of(StringIntern, str) + len + 1, gb_align_of(StringIntern));
new_intern->len = len;
new_intern->next = found ? *found : nullptr;
gb_memmove(new_intern->str, text, len);
new_intern->str[len] = 0;
map_set(&string_intern_map, key, new_intern);
return new_intern->str;
}
gb_internal char const *string_intern(String const &string) {
return string_intern(cast(char const *)string.text, string.len);
}
gb_internal void init_string_interner(void) {
map_init(&string_intern_map);
}
gb_internal i32 next_pow2(i32 n) {
if (n <= 0) {
return 0;