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digraphs

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This commit is contained in:
Wolfgang (Blub) Bumiller 2012-10-29 13:56:00 +01:00
parent e6cebc3ea3
commit 6126db10df
1 changed files with 20 additions and 0 deletions
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20
lexer.c
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@ -225,6 +225,24 @@ static int lex_try_trigraph(lex_file *lex, int old)
}
}
static int lex_try_digraph(lex_file *lex, int ch)
{
int c2;
c2 = fgetc(lex->file);
if (ch == '<' && c2 == ':')
return '[';
else if (ch == ':' && c2 == '>')
return ']';
else if (ch == '<' && c2 == '%')
return '{';
else if (ch == '%' && c2 == '>')
return '}';
else if (ch == '%' && c2 == ':')
return '#';
lex_ungetch(lex, c2);
return ch;
}
static int lex_getch(lex_file *lex)
{
int ch;
@ -241,6 +259,8 @@ static int lex_getch(lex_file *lex)
lex->line++;
else if (ch == '?')
return lex_try_trigraph(lex, ch);
else if (ch == '<' || ch == ':' || ch == '%')
return lex_try_digraph(lex, ch);
return ch;
}