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hyung-hwan 2005-11-15 15:32:39 +00:00
parent 4b7b37686f
commit f53553e65e
1 changed files with 69 additions and 9 deletions
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78
ase/awk/parse.c
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@ -1,5 +1,5 @@
/*
* $Id: parse.c,v 1.3 2005-11-14 15:23:53 bacon Exp $
* $Id: parse.c,v 1.4 2005-11-15 15:32:39 bacon Exp $
*/
#include <xp/awk/awk.h>
@ -9,6 +9,7 @@
enum
{
TOKEN_EOF,
TOKEN_ASSIGN,
TOKEN_EQ,
TOKEN_NE,
@ -20,9 +21,17 @@ enum
TOKEN_MINUS_MINUS,
TOKEN_MINUS_ASSIGN,
TOKEN_LPAREN,
TOKEN_RPAREN,
TOKEN_LBRACE,
TOKEN_RBRACE,
TOKEN_LBRAKET,
TOKEN_RBRAKET,
TOKEN_IDENT,
TOEKN_BEGIN,
TOKEN_END,
TOKEN_FUNCTION
};
static int __parse (xp_awk_t* awk);
@ -31,6 +40,20 @@ static int __get_char (xp_awk_t* awk);
static int __unget_char (xp_awk_t* awk, xp_cint_t c);
static int __skip_spaces (xp_awk_t* awk);
static int __skip_comment (xp_awk_t* awk);
static int __classfy_ident (const xp_char_t* ident);
struct __kwent {
const xp_char_t* name,
int type;
};
static struct __kwent __kwtab[] =
{
{ XP_TEXT("BEGIN"), TOKEN_BEGIN },
{ XP_TEXT("END"), TOKEN_END },
{ XP_TEXT("function"), TOKEN_FUNCTION },
{ XP_NULL, 0 },
};
#define GET_CHAR(awk) \
do { if (__get_char(awk) == -1) return -1; } while(0)
@ -85,10 +108,22 @@ static int __get_token (xp_awk_t* awk)
SET_TOKEN_TYPE (awk, TOKEN_EOF);
}
else if (xp_isdigit(c)) {
/* number */
}
else if (xp_isalpha(c) || c == XP_CHAR('_')) {
/* identifier */
do {
ADD_TOKEN_CHAR (awk, c);
GET_CHAR_TO (awk, c);
} while (xp_isalpha(c) || c == XP_CHAR('_') || xp_isdigit(c));
SET_TOKEN_TYPE (awk, __classfy_ident(XP_STR_BUF(&awk->token.name)));
}
else if (c == XP_CHAR('\"')) {
/* string */
}
else if (c == XP_CHAR('/')) {
/* regular expression */
}
else if (c == XP_CHAR('=')) {
GET_CHAR_TO (awk, c);
@ -154,14 +189,29 @@ static int __get_token (xp_awk_t* awk)
ADD_TOKEN_STR (awk, XP_TEXT("-"));
}
}
else if (__is_ident_char(c)) {
SET_TOKEN_TYPE (awk, TOKEN_IDENT);
/*
do {
ADD_TOKEN_CHAR (awk, c);
GET_CHAR_TO (awk, c);
} while (__is_ident_char(c));
*/
else if (c == XP_CHAR('(') {
SET_TOKEN_TYPE (awk, TOKEN_LPAREN);
ADD_TOKEN_STR (awk, c);
}
else if (c == XP_CHAR(')') {
SET_TOKEN_TYPE (awk, TOKEN_RPAREN);
ADD_TOKEN_STR (awk, c);
}
else if (c == XP_CHAR('{') {
SET_TOKEN_TYPE (awk, TOKEN_LBRACE);
ADD_TOKEN_STR (awk, c);
}
else if (c == XP_CHAR('}') {
SET_TOKEN_TYPE (awk, TOKEN_RBRACE);
ADD_TOKEN_CHAR (awk, c);
}
else if (c == XP_CHAR('[') {
SET_TOKEN_TYPE (awk, TOKEN_LBRAKET);
ADD_TOKEN_STR (awk, c);
}
else if (c == XP_CHAR(']') {
SET_TOKEN_TYPE (awk, TOKEN_RBRAKET);
ADD_TOKEN_CHAR (awk, c);
}
else {
awk->errnum = XP_AWK_ELXCHR;
@ -237,3 +287,13 @@ static int __skip_comment (xp_awk_t* awk)
return 0;
}
static int __classfy_ident (const xp_char_t* ident)
{
struct __kwent* p = __kwtab;
while (p->name != XP_NULL) {
if (xp_strcmp(p->name, ident) == 0) return p->type;
}
return TOKEN_IDENT;
}