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hyung-hwan 2006-01-12 14:20:17 +00:00
parent 2ea1efedcf
commit 5fc64d4b13
2 changed files with 148 additions and 76 deletions
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213
ase/awk/parse.c
View File

@ -1,5 +1,5 @@
/*
* $Id: parse.c,v 1.15 2006-01-12 12:30:29 bacon Exp $
* $Id: parse.c,v 1.16 2006-01-12 14:20:17 bacon Exp $
*/
#include <xp/awk/awk.h>
@ -58,6 +58,23 @@ enum
TOKEN_NEXTFILE
};
enum {
BINOP_PLUS,
BINOP_MINUS,
BINOP_MUL,
BINOP_DIV,
BINOP_MOD
};
static xp_char_t __binop_char[] =
{
XP_CHAR('+'),
XP_CHAR('-'),
XP_CHAR('*'),
XP_CHAR('/'),
XP_CHAR('%')
};
static xp_awk_node_t* __parse_program (xp_awk_t* awk);
static xp_awk_node_t* __parse_funcdcl (xp_awk_t* awk);
static xp_awk_node_t* __parse_patnact (xp_awk_t* awk);
@ -65,7 +82,7 @@ static xp_awk_node_t* __parse_block (xp_awk_t* awk);
static xp_awk_node_t* __parse_stat (xp_awk_t* awk);
static xp_awk_node_t* __parse_expr (xp_awk_t* awk);
static xp_awk_node_t* __parse_assignment (xp_awk_t* awk, xp_char_t* ident);
static xp_awk_node_t* __parse_basic_expr (xp_awk_t* awk, const xp_char_t* ident);
static xp_awk_node_t* __parse_basic_expr (xp_awk_t* awk, xp_char_t* ident);
static xp_awk_node_t* __parse_additive (xp_awk_t* awk);
static xp_awk_node_t* __parse_multiplicative (xp_awk_t* awk);
static xp_awk_node_t* __parse_unary (xp_awk_t* awk);
@ -120,13 +137,13 @@ static struct __kwent __kwtab[] =
#define SET_TOKEN_TYPE(awk,code) ((awk)->token.type = code)
#define ADD_TOKEN_CHAR(awk,c) do { \
if (xp_str_ccat(&(awk)->token.name,(c)) == -1) { \
if (xp_str_ccat(&(awk)->token.name,(c)) == (xp_size_t)-1) { \
(awk)->errnum = XP_AWK_ENOMEM; return -1; \
} \
} while (0)
#define ADD_TOKEN_STR(awk,str) do { \
if (xp_str_cat(&(awk)->token.name,(str)) == -1) { \
if (xp_str_cat(&(awk)->token.name,(str)) == (xp_size_t)-1) { \
(awk)->errnum = XP_AWK_ENOMEM; return -1; \
} \
} while (0)
@ -176,13 +193,23 @@ void __print_parse_tree (xp_awk_node_t* tree, int depth)
xp_printf (XP_TEXT(";\n"));
}
else if (p->type == XP_AWK_NODE_BINARY) {
xp_printf (XP_TEXT("binary basic expression\n"));
xp_printf (XP_TEXT("("));
__print_parse_tree (((xp_awk_node_expr_t*)p)->left, 0);
xp_printf (XP_TEXT(" %c "), __binop_char[((xp_awk_node_expr_t*)p)->opcode]);
__print_parse_tree (((xp_awk_node_expr_t*)p)->right, 0);
xp_printf (XP_TEXT(")"));
}
else if (p->type == XP_AWK_NODE_UNARY) {
xp_printf (XP_TEXT("unary basic expression\n"));
}
else if (p->type == XP_AWK_NODE_STR) {
xp_printf (XP_TEXT("\"%s\""), ((xp_awk_node_str_t*)p)->value);
xp_printf (XP_TEXT("\"%s\""), ((xp_awk_node_term_t*)p)->value);
}
else if (p->type == XP_AWK_NODE_NUM) {
xp_printf (XP_TEXT("%s"), ((xp_awk_node_term_t*)p)->value);
}
else if (p->type == XP_AWK_NODE_VAR) {
xp_printf (XP_TEXT("%s"), ((xp_awk_node_term_t*)p)->value);
}
p = p->next;
@ -284,9 +311,7 @@ static xp_awk_node_t* __parse_block (xp_awk_t* awk)
{
xp_awk_node_block_t* blk;
xp_awk_node_t* node, * prev;
int saved_token;
xp_printf (XP_TEXT("__parse_block....\n"));
blk = (xp_awk_node_block_t*) xp_malloc (xp_sizeof(xp_awk_node_block_t));
if (blk == XP_NULL) {
/* TODO: do some clean-up */
@ -298,8 +323,6 @@ xp_printf (XP_TEXT("__parse_block....\n"));
blk->body = prev = XP_NULL;
while (1) {
saved_token = awk->token.type;
if (MATCH(awk,TOKEN_EOF)) {
/* TODO: do come clean-up */
PANIC (awk, XP_AWK_EENDSRC);
@ -311,7 +334,6 @@ xp_printf (XP_TEXT("__parse_block....\n"));
break;
}
if (MATCH(awk, TOKEN_SEMICOLON)) {
/* null statement */
CONSUME (awk);
@ -325,14 +347,11 @@ xp_printf (XP_TEXT("__parse_block....\n"));
}
else node = __parse_stat (awk);
if (node != NULL) print_parse_tree (node);
if (node == XP_NULL) return XP_NULL;
if (prev == XP_NULL) blk->body = node;
else prev->next = node;
prev = node;
}
return (xp_awk_node_t*)blk;
@ -417,7 +436,6 @@ static xp_awk_node_t* __parse_expr (xp_awk_t* awk)
*/
xp_awk_node_t* x;
xp_printf (XP_TEXT("parse_expr.......................\n"));
if (MATCH(awk,TOKEN_IDENT)) {
// TODO: use a different approach later...
xp_char_t* ident = xp_strdup (XP_STR_BUF(&awk->token.name));
@ -426,11 +444,9 @@ xp_printf (XP_TEXT("parse_expr.......................\n"));
PANIC (awk, XP_AWK_ENOMEM);
}
xp_printf (XP_TEXT("parse_expr 1111111111111111111111111111.......................\n"));
CONSUME (awk);
if (MATCH(awk,TOKEN_ASSIGN)) {
CONSUME (awk);
xp_printf (XP_TEXT("parse_expr 22222222222222222222222222222222.......................\n"));
x = __parse_assignment(awk, ident);
}
else x = __parse_basic_expr (awk, ident);
@ -439,6 +455,7 @@ xp_printf (XP_TEXT("parse_expr 22222222222222222222222222222222.................
return x; // TODO: anything to clearn when x is XP_NULL????
}
// TODO: maybe this shoudl be an error ->>> just an expression without assignment */
return __parse_basic_expr (awk, XP_NULL);
}
@ -450,19 +467,15 @@ static xp_awk_node_t* __parse_assignment (xp_awk_t* awk, xp_char_t* ident)
xp_assert (ident != XP_NULL);
xp_printf (XP_TEXT("__parse_assignment starting for %s\n"), ident);
node = (xp_awk_node_assign_t*)xp_malloc (xp_sizeof(xp_awk_node_assign_t));
xp_printf (XP_TEXT("__parse_assignment xxxxxxxxxxxxxxxxxxxxxxx %s\n"), ident);
if (node == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
xp_printf (XP_TEXT("__parse_assignment duplicating string... %s\n"), ident);
idtdup = xp_strdup (ident);
if (idtdup == XP_NULL) {
xp_free (node);
PANIC (awk, XP_AWK_ENOMEM);
}
xp_printf (XP_TEXT("__parse_assignment for %s\n"), ident);
value = __parse_basic_expr (awk, XP_NULL);
if (value == XP_NULL) {
xp_free (idtdup);
@ -478,7 +491,7 @@ xp_printf (XP_TEXT("__parse_assignment for %s\n"), ident);
return (xp_awk_node_t*)node;
}
static xp_awk_node_t* __parse_basic_expr (xp_awk_t* awk, const xp_char_t* ident)
static xp_awk_node_t* __parse_basic_expr (xp_awk_t* awk, xp_char_t* ident)
{
/* <basic expression> ::= <additive>
* <additive> ::= <multiplicative> [additiveOp <multiplicative>]*
@ -492,54 +505,90 @@ static xp_awk_node_t* __parse_basic_expr (xp_awk_t* awk, const xp_char_t* ident)
return __parse_additive (awk);
}
static xp_awk_node_t* __parse_additive (xp_awk_t* awk)
{
xp_awk_node_t* top, * left, * right;
xp_awk_node_expr_t* node;
xp_awk_node_t* left, * right;
int opcode;
/*
left = __parse_multiplicative (awk);
if (left == XP_NULL) return XP_NULL;
while (MATCH(awk,TOKEN_MUL) ||
MATCH(awk,TOKEN_DIV) ||
MATCH(awk,TOKEN_MOD)) {
while (1) {
if (MATCH(awk,TOKEN_PLUS)) opcode = BINOP_PLUS;
else if (MATCH(awk,TOKEN_MINUS)) opcode = BINOP_MINUS;
else break;
CONSUME (awk);
right = __parse_multiplicative (awk);
if (right == XP_NULL) {
// TODO: memory clean-up
if (__get_token(awk) == -1) {
// TODO: cleanup left...
return XP_NULL;
}
right = __parse_multiplicative (awk);
if (right == XP_NULL) {
// TOOD: cleanup left if necessary
return XP_NULL;
}
node = (xp_awk_node_expr_t*)xp_malloc(xp_sizeof(xp_awk_node_expr_t));
if (node == XP_NULL) {
// TODO: cleanup previous tmp (maybe current left) if necessary
// TOOD: cleanup left if necessary
PANIC (awk, XP_AWK_ENOMEM);
}
node->type = XP_AWK_NODE_BINARY;
node->next = XP_NULL;
node->opcode = opcode;
node->left = left;
node->right = right;
left = (xp_awk_node_t*)node;
}
return top;
*/
return __parse_multiplicative (awk);
return left;
}
static xp_awk_node_t* __parse_multiplicative (xp_awk_t* awk)
{
xp_awk_node_t* top, * left, * right;
xp_awk_node_expr_t* node;
xp_awk_node_t* left, * right;
int opcode;
/*
left = __parse_unary (awk);
if (left == XP_NULL) return XP_NULL;
while (MATCH(awk,TOKEN_MUL) ||
MATCH(awk,TOKEN_DIV) ||
MATCH(awk,TOKEN_MOD)) {
while (1) {
if (MATCH(awk,TOKEN_MUL)) opcode = BINOP_MUL;
else if (MATCH(awk,TOKEN_DIV)) opcode = BINOP_DIV;
else if (MATCH(awk,TOKEN_MOD)) opcode = BINOP_MOD;
else break;
CONSUME (awk);
right = __parse_unary (awk);
if (right == XP_NULL) {
// TODO: memory clean-up
// TOOD: cleanup left if necessary
return XP_NULL;
}
node = (xp_awk_node_expr_t*)xp_malloc(xp_sizeof(xp_awk_node_expr_t));
if (node == XP_NULL) {
// TODO: cleanup previous tmp (maybe current left) if necessary
// TOOD: cleanup left if necessary
PANIC (awk, XP_AWK_ENOMEM);
}
node->type = XP_AWK_NODE_BINARY;
node->next = XP_NULL;
node->opcode = opcode;
node->left = left;
node->right = right;
left = (xp_awk_node_t*)node;
}
return top;
*/
return __parse_unary (awk);
return left;
}
static xp_awk_node_t* __parse_unary (xp_awk_t* awk)
@ -549,38 +598,66 @@ static xp_awk_node_t* __parse_unary (xp_awk_t* awk)
static xp_awk_node_t* __parse_primary (xp_awk_t* awk)
{
/*if (MATCH(awk,TOKEN_INTEGER)) {
}
else*/ if (MATCH(awk,TOKEN_STRING)) {
xp_awk_node_str_t* node;
node = (xp_awk_node_str_t*)xp_malloc(xp_sizeof(xp_awk_node_str_t));
if (node == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
xp_printf (XP_TEXT("found a string token...\n"));
node->type = XP_AWK_NODE_STR;
node->next = XP_NULL;
node->value = xp_strdup(XP_STR_BUF(&awk->token.name));
xp_printf (XP_TEXT("string node value [%s]\n"), node->value);
CONSUME (awk);
return (xp_awk_node_t*)node;
}
/*
else if (MATCH(awk,TOKEN_IDENT)) {
if (MATCH(awk,TOKEN_INTEGER)) {
xp_awk_node_term_t* node;
node = (xp_awk_node_term_t*)xp_malloc(xp_sizeof(xp_awk_node_term_t));
if (node == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
node->type = XP_AWK_NODE_IDT;
node->type = XP_AWK_NODE_NUM;
node->next = XP_NULL;
node->value = token_value....
node->value = xp_strdup(XP_STR_BUF(&awk->token.name));
if (node->value == XP_NULL) {
xp_free (node);
PANIC (awk, XP_AWK_ENOMEM);
}
CONSUME (awk);
return (xp_awk_node_t*)node;
}
else if (MATCH(awk,TOKEN_STRING)) {
xp_awk_node_term_t* node;
node = (xp_awk_node_term_t*)xp_malloc(xp_sizeof(xp_awk_node_term_t));
if (node == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
node->type = XP_AWK_NODE_STR;
node->next = XP_NULL;
node->value = xp_strdup(XP_STR_BUF(&awk->token.name));
if (node->value == XP_NULL) {
xp_free (node);
PANIC (awk, XP_AWK_ENOMEM);
}
CONSUME (awk);
return (xp_awk_node_t*)node;
}
else if (MATCH(awk,TOKEN_IDENT)) {
xp_char_t* idtdup;
idtdup = xp_strdup(XP_STR_BUF(&awk->token.name));
if (idtdup == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
CONSUME (awk); // error handling... replace it by get_token...
if (MATCH(awk,TOKEN_LPAREN)) {
/* function call */
// TODO:
}
else {
xp_awk_node_term_t* node;
node = (xp_awk_node_term_t*)xp_malloc(xp_sizeof(xp_awk_node_term_t));
if (node == XP_NULL) PANIC (awk, XP_AWK_ENOMEM);
node->type = XP_AWK_NODE_VAR;
node->next = XP_NULL;
node->value = idtdup;
return (xp_awk_node_t*)node;
}
}
/*
else if (MATCH(awk,TOKEN_LPAREN)) {
xp_awk_node_t* tmp;
xp_awk_node_term_t* node;
xp_awk_node_term_t* node; -> use different type
CONSUME (awk);
tmp = __parse_expr (awk);
@ -703,9 +780,6 @@ static int __get_token (xp_awk_t* awk)
GET_CHAR_TO (awk, c);
// TODO: enhance string handling including escaping
}
else if (c == XP_CHAR('/')) {
/* regular expression */
}
else if (c == XP_CHAR('=')) {
GET_CHAR_TO (awk, c);
if (c == XP_CHAR('=')) {
@ -776,6 +850,7 @@ static int __get_token (xp_awk_t* awk)
GET_CHAR_TO (awk, c);
}
else if (c == XP_CHAR('/')) {
// TODO: handle regular expression here... /^pattern$/
SET_TOKEN_TYPE (awk, TOKEN_DIV);
ADD_TOKEN_CHAR (awk, c);
GET_CHAR_TO (awk, c);
@ -894,6 +969,8 @@ static int __skip_comment (xp_awk_t* awk)
}
if (__unget_char(awk, c) == -1) return -1;
awk->lex.curc = XP_CHAR('/');
return 0;
}

15
ase/awk/tree.h
View File

@ -1,5 +1,5 @@
/*
* $Id: tree.h,v 1.4 2006-01-11 14:03:17 bacon Exp $
* $Id: tree.h,v 1.5 2006-01-12 14:20:17 bacon Exp $
*/
#ifndef _XP_AWK_TREE_H_
@ -13,14 +13,15 @@ enum
XP_AWK_NODE_ASSIGN,
XP_AWK_NODE_BINARY,
XP_AWK_NODE_UNARY,
XP_AWK_NODE_STR
XP_AWK_NODE_STR,
XP_AWK_NODE_NUM,
XP_AWK_NODE_VAR,
};
typedef struct xp_awk_node_t xp_awk_node_t;
typedef struct xp_awk_node_block_t xp_awk_node_block_t;
typedef struct xp_awk_node_assign_t xp_awk_node_assign_t;
typedef struct xp_awk_node_expr_t xp_awk_node_expr_t;
typedef struct xp_awk_node_str_t xp_awk_node_str_t;
typedef struct xp_awk_node_term_t xp_awk_node_term_t;
typedef struct xp_awk_node_if_t xp_awk_node_if_t;
typedef struct xp_awk_node_while_t xp_awk_node_while_t;
@ -63,16 +64,10 @@ struct xp_awk_node_expr_t
xp_awk_node_t* right;
};
struct xp_awk_node_str_t
{
XP_AWK_NODE_HDR;
xp_char_t* value;
};
struct xp_awk_node_term_t
{
XP_AWK_NODE_HDR;
xp_awk_node_t* value;
xp_char_t* value;
};
struct xp_awk_node_if_t