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Added hex and bin literal support to Expression parser

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fixed formatting
This commit is contained in:
Hayden Leete 2022-02-03 14:52:53 +13:00 committed by Hayden
parent 025e778020
commit 018de19eba
1 changed files with 44 additions and 4 deletions
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48
core/math/expression.cpp
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@ -41,6 +41,14 @@ static bool _is_number(char32_t c) {
return (c >= '0' && c <= '9');
}
static bool _is_hex_digit(char32_t c) {
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
}
static bool _is_binary_digit(char32_t c) {
return (c == '0' || c == '1');
}
Error Expression::_get_token(Token &r_token) {
while (true) {
#define GET_CHAR() (str_ofs >= expression.length() ? 0 : expression[str_ofs++])
@ -334,21 +342,32 @@ Error Expression::_get_token(Token &r_token) {
String num;
#define READING_SIGN 0
#define READING_INT 1
#define READING_DEC 2
#define READING_EXP 3
#define READING_DONE 4
#define READING_HEX 2
#define READING_BIN 3
#define READING_DEC 4
#define READING_EXP 5
#define READING_DONE 6
int reading = READING_INT;
char32_t c = cchar;
bool exp_sign = false;
bool exp_beg = false;
bool bin_beg = false;
bool hex_beg = false;
bool is_float = false;
bool is_first_char = true;
while (true) {
switch (reading) {
case READING_INT: {
if (_is_number(c)) {
//pass
if (is_first_char && c == '0') {
if (next_char == 'b') {
reading = READING_BIN;
} else if (next_char == 'x') {
reading = READING_HEX;
}
}
} else if (c == '.') {
reading = READING_DEC;
is_float = true;
@ -358,6 +377,22 @@ Error Expression::_get_token(Token &r_token) {
reading = READING_DONE;
}
} break;
case READING_BIN: {
if (bin_beg && !_is_binary_digit(c)) {
reading = READING_DONE;
} else if (c == 'b') {
bin_beg = true;
}
} break;
case READING_HEX: {
if (hex_beg && !_is_hex_digit(c)) {
reading = READING_DONE;
} else if (c == 'x') {
hex_beg = true;
}
} break;
case READING_DEC: {
if (_is_number(c)) {
@ -390,6 +425,7 @@ Error Expression::_get_token(Token &r_token) {
}
num += String::chr(c);
c = GET_CHAR();
is_first_char = false;
}
str_ofs--;
@ -398,6 +434,10 @@ Error Expression::_get_token(Token &r_token) {
if (is_float) {
r_token.value = num.to_float();
} else if (bin_beg) {
r_token.value = num.bin_to_int();
} else if (hex_beg) {
r_token.value = num.hex_to_int();
} else {
r_token.value = num.to_int();
}