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Added hex and binary character encoding to strings
Use '\b' and '\x' to encode characters in strings!
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parent
c7116ab752
commit
d690c3040d
52
src/clex.c
52
src/clex.c
@ -151,6 +151,10 @@ char next(CLexState *state) {
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return state->currentChar[-1];
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}
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bool isHex(char c) {
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return isNumerical(c) || ('A' <= c && 'F' >= c) || ('a' <= c && 'f' >= c);
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}
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CTokenType identifierType(CLexState *state) {
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int length = state->currentChar - state->startChar;
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@ -206,6 +210,48 @@ CToken parseString(CLexState *state) {
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case 't': appendBuffer(state, '\t'); break;
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case '\\': appendBuffer(state, '\\'); break;
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case '"': appendBuffer(state, '"'); break;
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case 'x': // hexadecimal character encoding
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next(state); // skip 'x'
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if (isHex(peek(state))) {
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char *numStart = state->currentChar;
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// consume the hexnum
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while (isHex(peek(state)))
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next(state);
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state->currentChar--; // since next() is called after
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unsigned int num = (unsigned int)strtoul(numStart, NULL, 16);
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if (num > 255) // sanity check
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return makeError(state, "Character out of range! > 255!");
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appendBuffer(state, num);
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break;
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}
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return makeError(state, "Unknown hexadecimal character encoding!");
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case 'b': // binary character encoding
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next(state); // skip 'b'
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if (peek(state) == '0' || peek(state) == '1') {
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char *numStart = state->currentChar;
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// consume the bin
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while (peek(state) == '0' || peek(state) == '1')
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next(state);
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state->currentChar--; // since next() is called after
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unsigned int num = (unsigned int)strtoul(numStart, NULL, 2);
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if (num > 255) // sanity check
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return makeError(state, "Character out of range! > 255!");
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appendBuffer(state, num);
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break;
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}
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return makeError(state, "Unknown binary character encoding!");
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default: {
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if (isNumerical(peek(state))) {
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char *numStart = state->currentChar;
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@ -215,7 +261,7 @@ CToken parseString(CLexState *state) {
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next(state);
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state->currentChar--; // since next() is called after
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int num = (int)strtol(numStart, NULL, 10);
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unsigned int num = (unsigned int)strtoul(numStart, NULL, 10);
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if (num > 255) // sanity check
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return makeError(state, "Character out of range! > 255!");
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@ -245,10 +291,6 @@ CToken parseString(CLexState *state) {
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return makeToken(state, TOKEN_STRING);
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}
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bool isHex(char c) {
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return isNumerical(c) || ('A' <= c && 'F' >= c) || ('a' <= c && 'f' >= c);
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}
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CToken parseNumber(CLexState *state) {
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switch (peek(state)) {
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case 'x': // hexadecimal number
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