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authorTeddy <ted.sybil@gmail.com>2013-08-04 17:18:20 +0800
committerTeddy <ted.sybil@gmail.com>2013-08-04 17:18:20 +0800
commitacb298c7f864f9862859320555b416c97632d2fa (patch)
tree667922093cf5066fbbf5fbc989f07cf19f4457e3
parent5ab1a4462b1df413a54dc1befc68961c81be69bf (diff)
added comment support
-rw-r--r--parser.cpp23
1 files changed, 19 insertions, 4 deletions
diff --git a/parser.cpp b/parser.cpp
index ecfafab..8de812f 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -17,12 +17,17 @@ void Tokenizor::set_stream(FILE *_stream) {
stream = _stream;
}
+#define IS_NEWLINE(ch) \
+ ((ch) == '\n')
#define IS_BRACKET(ch) \
((ch) == '(' || (ch) == ')')
#define IS_SPACE(ch) \
- ((ch) == ' ' || (ch) == '\t' || (ch) == '\n')
+ ((ch) == ' ' || (ch) == '\t' || IS_NEWLINE(ch))
#define IS_DELIMITER(ch) \
(IS_BRACKET(ch) || IS_SPACE(ch))
+#define IS_COMMENT(ch) \
+ ((ch) == ';')
+
#define POP \
do { \
*buff_ptr = 0; \
@@ -36,10 +41,20 @@ bool Tokenizor::get_token(string &ret) {
while (fread(&ch, 1, 1, stream))
{
if (buff_ptr != buff &&
- (IS_BRACKET(*buff) || IS_DELIMITER(ch)))
+ (IS_BRACKET(*buff) ||
+ IS_DELIMITER(ch) ||
+ IS_COMMENT(ch)))
{
- POP;
- flag = true;
+ if (IS_COMMENT(*buff))
+ {
+ if (IS_NEWLINE(ch)) buff_ptr = buff;
+ else buff_ptr = buff + 1;
+ }
+ else
+ {
+ POP;
+ flag = true;
+ }
}
if (!IS_SPACE(ch)) *buff_ptr++ = ch;
if (flag) return true;