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ExpressionParser: Simplify pi detection

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This commit is contained in:
John Scipione
2013-07-12 22:39:37 -04:00
parent 786b0f8f1e
commit 747612e390
1 changed files with 3 additions and 12 deletions
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src/kits/shared/ExpressionParser.cpp
+3 -12
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@@ -197,7 +197,6 @@ class ExpressionParser::Tokenizer {
fCurrentToken = Token(begin, length, _CurrentPos() - length,
TOKEN_CONSTANT);
fCurrentToken.value = temp.String();
} else if (isalpha(*fCurrentChar) && *fCurrentChar != 'x') {
const char* begin = fCurrentChar;
while (*fCurrentChar != 0 && (isalpha(*fCurrentChar)
@@ -207,14 +206,10 @@ class ExpressionParser::Tokenizer {
int32 length = fCurrentChar - begin;
fCurrentToken = Token(begin, length, _CurrentPos() - length,
TOKEN_IDENTIFIER);
} else if ((unsigned char)fCurrentChar[0] == 0xCF
&& (unsigned char)fCurrentChar[1] == 0x80) {
// UTF-8 small greek letter PI
} else if (strncmp(fCurrentChar, "π", 2) == 0) {
fCurrentToken = Token(fCurrentChar, 2, _CurrentPos() - 1,
TOKEN_IDENTIFIER);
fCurrentChar += 2;
} else {
int32 type = TOKEN_NONE;
@@ -567,14 +562,10 @@ ExpressionParser::_InitArguments(MAPM values[], int32 argumentCount)
MAPM
ExpressionParser::_ParseFunction(const Token& token)
{
if (strcmp("e", token.string.String()) == 0)
if (token.string == "e")
return _ParseFactorial(MAPM(MM_E));
else if (strcasecmp("pi", token.string.String()) == 0
|| ((unsigned char)token.string.String()[0] == 0xCF
&& (unsigned char)token.string.String()[1] == 0x80)) {
// UTF-8 small greek letter PI
else if (token.string.ICompare("pi") == 0 || token.string == "π")
return _ParseFactorial(MAPM(MM_PI));
}
// hard coded cases for different count of arguments
// supports functions with 3 arguments at most