87 lines
1.5 KiB
C
87 lines
1.5 KiB
C
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function S64
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clamp_top_s64(S64 val, S64 max){
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if(val>max)return max;
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return val;
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}
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function SizeU
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clamp_top_sizeu(SizeU val, SizeU max){
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if(val>max)return max;
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return val;
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}
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function SizeU
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get_align_offset(SizeU size, SizeU align){
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SizeU mask = align - 1;
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SizeU val = size & mask;
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if(val){
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val = align - val;
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}
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return val;
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}
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function SizeU
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align_up(SizeU size, SizeU align){
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SizeU result = size + get_align_offset(size, align);
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return result;
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}
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function U64
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hash_fnv(String string) {
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U64 hash = (U64)14695981039346656037ULL;
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for (U64 i = 0; i < string.len; i++) {
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hash = hash ^ (U64)(string.str[i]);
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hash = hash * (U64)1099511628211ULL;
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}
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return hash;
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}
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function U64
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is_pow2(U64 x) {
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assert(x != 0);
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B32 result = (x & (x - 1llu)) == 0;
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return result;
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}
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function U64
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wrap_around_pow2(U64 x, U64 power_of_2) {
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assert(is_pow2(power_of_2));
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U64 r = (((x)&((power_of_2)-1llu)));
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return r;
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}
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function B32
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string_compare(String a, String b){
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if(a.len != b.len)
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return false;
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for(S64 i = 0; i < a.len; i++){
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if(a.str[i] != b.str[i])
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return false;
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}
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return true;
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}
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function U8
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char_to_lower(U8 c){
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if(c >= 'A' && c <= 'Z')
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c += 32;
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return c;
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}
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function U8
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char_to_upper(U8 c){
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if(c >= 'a' && c <= 'z')
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c -= 32;
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return c;
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}
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function String
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string_to_lower(Arena *arena, String string){
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String result = arena_push_string_copy(arena, string);
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for(S64 i = 0; i < string.len; i++){
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result.str[i] = char_to_lower(result.str[i]);
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}
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return result;
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}
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