CPunch/Cosmo
1
0
Fork 0
mirror of https://github.com/CPunch/Cosmo.git synced 2024-11-10 18:30:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

Added hex and binary character encoding to strings

Browse Source 
Use '\b' and '\x' to encode characters in strings!
This commit is contained in:
CPunch 2021-01-19 12:22:20 -06:00
parent c7116ab752
commit d690c3040d
1 changed files with 47 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/clex.c
View File

@ -151,6 +151,10 @@ char next(CLexState *state) {
return state->currentChar[-1]; return state->currentChar[-1];
} }
bool isHex(char c) {
return isNumerical(c) || ('A' <= c && 'F' >= c) || ('a' <= c && 'f' >= c);
}
CTokenType identifierType(CLexState *state) { CTokenType identifierType(CLexState *state) {
int length = state->currentChar - state->startChar; int length = state->currentChar - state->startChar;
@ -206,6 +210,48 @@ CToken parseString(CLexState *state) {
case 't': appendBuffer(state, '\t'); break; case 't': appendBuffer(state, '\t'); break;
case '\\': appendBuffer(state, '\\'); break; case '\\': appendBuffer(state, '\\'); break;
case '"': appendBuffer(state, '"'); break; case '"': appendBuffer(state, '"'); break;
case 'x': // hexadecimal character encoding
next(state); // skip 'x'
if (isHex(peek(state))) {
char *numStart = state->currentChar;
// consume the hexnum
while (isHex(peek(state)))
next(state);
state->currentChar--; // since next() is called after
unsigned int num = (unsigned int)strtoul(numStart, NULL, 16);
if (num > 255) // sanity check
return makeError(state, "Character out of range! > 255!");
appendBuffer(state, num);
break;
}
return makeError(state, "Unknown hexadecimal character encoding!");
case 'b': // binary character encoding
next(state); // skip 'b'
if (peek(state) == '0' || peek(state) == '1') {
char *numStart = state->currentChar;
// consume the bin
while (peek(state) == '0' || peek(state) == '1')
next(state);
state->currentChar--; // since next() is called after
unsigned int num = (unsigned int)strtoul(numStart, NULL, 2);
if (num > 255) // sanity check
return makeError(state, "Character out of range! > 255!");
appendBuffer(state, num);
break;
}
return makeError(state, "Unknown binary character encoding!");
default: { default: {
if (isNumerical(peek(state))) { if (isNumerical(peek(state))) {
char *numStart = state->currentChar; char *numStart = state->currentChar;
@ -215,7 +261,7 @@ CToken parseString(CLexState *state) {
next(state); next(state);
state->currentChar--; // since next() is called after state->currentChar--; // since next() is called after
int num = (int)strtol(numStart, NULL, 10); unsigned int num = (unsigned int)strtoul(numStart, NULL, 10);
if (num > 255) // sanity check if (num > 255) // sanity check
return makeError(state, "Character out of range! > 255!"); return makeError(state, "Character out of range! > 255!");
@ -245,10 +291,6 @@ CToken parseString(CLexState *state) {
return makeToken(state, TOKEN_STRING); return makeToken(state, TOKEN_STRING);
} }
bool isHex(char c) {
return isNumerical(c) || ('A' <= c && 'F' >= c) || ('a' <= c && 'f' >= c);
}
CToken parseNumber(CLexState *state) { CToken parseNumber(CLexState *state) {
switch (peek(state)) { switch (peek(state)) {
case 'x': // hexadecimal number case 'x': // hexadecimal number