ed/metadesk
1
0
Fork 0
mirror of https://github.com/Ed94/metadesk.git synced 2026-07-31 20:00:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

flesh out string -> integer functions

Browse Source
This commit is contained in:
Allen Webster
2021-06-28 10:45:55 -04:00
parent e9c5f28e4b
commit 15aa4d5b32
5 changed files with 94 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/md_impl.c
+61 -31
View File
@@ -424,43 +424,81 @@ MD_JoinStringList(MD_String8List list, MD_String8 separator)
return string;
}
MD_FUNCTION_IMPL MD_i64
MD_I64FromString(MD_String8 string, MD_u32 radix)
MD_FUNCTION_IMPL MD_u64
MD_CalculateCStringLength(char *cstr)
{
MD_u64 i = 0;
for(; cstr[i]; i += 1);
return i;
}
MD_FUNCTION_IMPL MD_u64
MD_U64FromString(MD_String8 string, MD_u32 radix)
{
MD_Assert(2 <= radix && radix <= 16);
static MD_u8 char_to_value[] = {
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
0x08,0x09,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
};
// get the sign
MD_i64 sign = +1;
MD_u64 i = 0;
if (string.size > 0){
if (string.str[i] == '-'){
i = 1;
sign = -1;
}
if (string.str[i] == '+'){
i = 1;
}
}
// get the value
MD_i64 value = 0;
for (;i < string.size; i += 1){
MD_u64 value = 0;
for (MD_u64 i = 0; i < string.size; i += 1){
value *= radix;
MD_u8 c = string.str[i];
value += char_to_value[(c - 0x30)&0x1F];
}
value *= sign;
return(value);
}
MD_FUNCTION_IMPL MD_i64
MD_CStyleIntFromString(MD_String8 string)
{
MD_u64 p = 0;
// consume sign
MD_i64 sign = +1;
if (p < string.size){
MD_u8 c = string.str[p];
if (c == '-'){
sign = -1;
p += 1;
}
else if (c == '+'){
p += 1;
}
}
// radix from prefix
MD_u64 radix = 10;
if (p < string.size){
MD_u8 c0 = string.str[p];
if (c0 == '0'){
p += 1;
radix = 8;
if (p < string.size){
MD_u8 c1 = string.str[p];
if (c1 == 'x'){
p += 1;
radix = 16;
}
else if (c1 == 'b'){
p += 1;
radix = 2;
}
}
}
}
// consume integer "digits"
MD_String8 digits_substr = MD_StringSkip(string, p);
MD_u64 n = MD_U64FromString(digits_substr, radix);
// combine result
MD_i64 result = sign*n;
return(result);
}
MD_FUNCTION_IMPL MD_f64
MD_F64FromString(MD_String8 string)
{
@@ -474,14 +512,6 @@ MD_F64FromString(MD_String8 string)
return(atof(str));
}
MD_FUNCTION_IMPL MD_u64
MD_CalculateCStringLength(char *cstr)
{
MD_u64 i = 0;
for(; cstr[i]; i += 1);
return i;
}
MD_FUNCTION_IMPL MD_String8
MD_StyledStringFromString(MD_String8 string, MD_WordStyle word_style, MD_String8 separator)
{
@@ -2651,7 +2681,7 @@ MD_CommandLineOptionI64(MD_CommandLine cmdln, MD_String8 name)
MD_i64 v = 0;
MD_String8List values = MD_CommandLineOptionValues(cmdln, name);
MD_String8 value_str = MD_JoinStringList(values, MD_S8Lit(""));
v = MD_I64FromString(value_str, 10);
v = MD_CStyleIntFromString(value_str);
return v;
}