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Add support for octal and hexadecimal integer literals.

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In addition to the decimal literals which we already support. Note
that we use strtoll here to get the large-width integers demanded by
the specification.
This commit is contained in:
Carl Worth 2010-05-24 11:29:02 -07:00
parent 35419095f8
commit 03f6d5d2d4
1 changed files with 16 additions and 3 deletions
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19
glcpp-lex.l
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@ -45,10 +45,13 @@ NONSPACE [^[:space:]]
NEWLINE [\n]
HSPACE [ \t]
HASH ^{HSPACE}*#{HSPACE}*
INTEGER [0-9]+
IDENTIFIER [_a-zA-Z][_a-zA-Z0-9]*
TOKEN [^[:space:](),]+
DECIMAL_INTEGER [1-9][0-9]*[uU]?
OCTAL_INTEGER 0[0-7]*[uU]?
HEXADECIMAL_INTEGER 0[xX][0-9a-fA-F]+[uU]?
%%
{HASH}if{HSPACE}* {
@ -61,8 +64,18 @@ TOKEN [^[:space:](),]+
return ELIF;
}
<ST_IF>{INTEGER} {
yylval.ival = atoi (yytext);
<ST_IF>{DECIMAL_INTEGER} {
yylval.ival = strtoll (yytext, NULL, 10);
return INTEGER;
}
<ST_IF>{OCTAL_INTEGER} {
yylval.ival = strtoll (yytext + 1, NULL, 8);
return INTEGER;
}
<ST_IF>{HEXADECIMAL_INTEGER} {
yylval.ival = strtoll (yytext + 2, NULL, 16);
return INTEGER;
}