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hand written c-style hex string from integer

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This commit is contained in:
Allen Webster
2021-07-03 12:32:42 -04:00
parent e0399ef837
commit 687dcc81de
2 changed files with 46 additions and 5 deletions
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source/md.h
+5 -3
View File
@@ -774,9 +774,11 @@ MD_FUNCTION MD_String8 MD_PathChopLastSlash(MD_String8 string);
//~ Numeric Strings
MD_FUNCTION MD_u64 MD_U64FromString(MD_String8 string, MD_u32 radix);
MD_FUNCTION MD_i64 MD_CStyleIntFromString(MD_String8 string);
MD_FUNCTION MD_f64 MD_F64FromString(MD_String8 string);
MD_FUNCTION MD_u64 MD_U64FromString(MD_String8 string, MD_u32 radix);
MD_FUNCTION MD_i64 MD_CStyleIntFromString(MD_String8 string);
MD_FUNCTION MD_f64 MD_F64FromString(MD_String8 string);
MD_FUNCTION MD_String8 MD_CStyleHexStringFromU64(MD_u64 x, MD_b32 caps);
//~ Enum/Flag Strings
source/md_impl.c
+41 -2
View File
@@ -893,6 +893,45 @@ MD_F64FromString(MD_String8 string)
return(atof(str));
}
MD_FUNCTION_IMPL MD_String8
MD_CStyleHexStringFromU64(MD_u64 x, MD_b32 caps)
{
static char md_int_value_to_char[] = "0123456789abcdef";
MD_u8 buffer[10];
MD_u8 *opl = buffer + 10;
MD_u8 *ptr = opl;
if (x == 0){
ptr -= 1;
*ptr = '0';
}
else{
for (;;){
MD_u32 val = x%16;
x /= 16;
MD_u8 c = (MD_u8)md_int_value_to_char[val];
if (caps){
c = MD_CharToUpper(c);
}
ptr -= 1;
*ptr = c;
if (x == 0){
break;
}
}
}
ptr -= 1;
*ptr = 'x';
ptr -= 1;
*ptr = '0';
MD_String8 result = MD_ZERO_STRUCT;
result.size = (MD_u64)(ptr - buffer);
result.str = MD_PushArray(MD_u8, result.size);
MD_MemoryCopy(result.str, buffer, result.size);
return(result);
}
//~ Enum/Flag Strings
MD_FUNCTION_IMPL MD_String8
@@ -1861,11 +1900,11 @@ MD_ParseOneNode(MD_String8 string, MD_u64 offset)
switch (bad_token.kind){
case MD_TokenKind_BadCharacter:
{
// TODO(allen): tighten up with good integer <-> string helpers
MD_String8List bytes = {0};
for(int i_byte = 0; i_byte < bad_token.raw_string.size; ++i_byte)
{
MD_S8ListPush(&bytes, MD_S8Fmt("0x%02X", bad_token.raw_string.str[i_byte]));
MD_u8 b = bad_token.raw_string.str[i_byte];
MD_S8ListPush(&bytes, MD_CStyleHexStringFromU64(b, 1));
}
MD_StringJoin join = MD_ZERO_STRUCT;