/**
* CTRParserReference
*
* Generates the nodes to respresent a variable or property.
*/
ctr_tnode* ctr_cparse_ref() {
ctr_tnode* r;
char* tmp;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_REFERENCE;
r->vlen = ctr_clex_tok_value_length();
tmp = ctr_clex_tok_value();
if (strncmp("my", tmp, 2)==0 && r->vlen == 2) {
int t = ctr_clex_tok();
if (t != CTR_TOKEN_REF) {
printf("'My' should always be followed by property name!\n");
exit(1);
}
tmp = ctr_clex_tok_value();
r->modifier = 1;
r->vlen = ctr_clex_tok_value_length();
}
if (strncmp("var", tmp, 3)==0 && r->vlen == 3) {
int t = ctr_clex_tok();
if (t != CTR_TOKEN_REF) {
printf("'var' should always be followed by property name!\n");
exit(1);
}
tmp = ctr_clex_tok_value();
r->modifier = 2;
r->vlen = ctr_clex_tok_value_length();
}
r->value = ctr_malloc(r->vlen, 0);
memcpy(r->value, tmp, r->vlen);
return r;
}
/**
* CTRParserFin
*
* Generates a node to represent the end of a program.
*/
ctr_tnode* ctr_cparse_fin() {
ctr_tnode* f;
ctr_clex_tok();
f = CTR_PARSER_CREATE_NODE();
f->type = CTR_AST_NODE_ENDOFPROGRAM;
return f;
}
/**
* CTRParserExpression
*
* Generates a set of nodes to represent an expression.
*/
ctr_tnode* ctr_cparse_expr(int mode) {
ctr_tnode* r;
ctr_tnode* e;
int t2;
ctr_tlistitem* nodes;
ctr_tlistitem* rli;
if (ctr_mode_debug) printf("Parsing expression (mode: %d).\n", mode);
r = ctr_cparse_receiver();
t2 = ctr_clex_tok();
if (ctr_mode_debug) printf("First token after receiver = %d \n", t2);
ctr_clex_putback();
if (r->type == CTR_AST_NODE_REFERENCE && t2 == CTR_TOKEN_ASSIGNMENT) {
e = ctr_cparse_assignment(r);
} else if (t2 != CTR_TOKEN_DOT && t2 != CTR_TOKEN_PARCLOSE && t2 != CTR_TOKEN_CHAIN) {
e = CTR_PARSER_CREATE_NODE();
e->type = CTR_AST_NODE_EXPRMESSAGE;
nodes = ctr_cparse_messages(r, mode);
if (nodes == NULL) {
int t = ctr_clex_tok();
ctr_clex_putback();
if (ctr_mode_debug) printf("No messages, return. Next token: %d.\n", t);
return r; /* no messages, then just return receiver (might be in case of argument). */
}
rli = CTR_PARSER_CREATE_LISTITEM();
rli->node = r;
rli->next = nodes;
e->nodes = rli;
} else {
if (ctr_mode_debug) printf("Returning receiver. \n");
return r;
}
return e;
}
/**
* CTRParserNil
*
* Generates a node to represent Nil
*/
ctr_tnode* ctr_cparse_nil() {
ctr_tnode* r;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_LTRNIL;
r->value = "Nil";
r->vlen = 3;
return r;
}
/**
* CTRParserBooleanTrue
*
* Generates a node to represent a boolean True.
*/
ctr_tnode* ctr_cparse_true() {
ctr_tnode* r;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_LTRBOOLTRUE;
ASSIGN_STRING(r, value,"True",4);
r->vlen = 4;
return r;
}
/**
* CTRParserBooleanFalse
*
* Generates a node to represent a boolean False.
*/
ctr_tnode* ctr_cparse_false() {
ctr_tnode* r;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_LTRBOOLFALSE;
ASSIGN_STRING(r, value, "False", 5);
r->vlen = 5;
return r;
}
/**
* CTRParserAssignment
*
* Generates a node to represent an assignment.
*/
ctr_tnode* ctr_cparse_assignment(ctr_tnode* r) {
ctr_tnode* a;
ctr_tnode* assignmentExpr;
ctr_tlistitem* li;
ctr_tlistitem* liAssignExpr;
ctr_clex_tok();
a = CTR_PARSER_CREATE_NODE();
assignmentExpr = CTR_PARSER_CREATE_NODE();
li = CTR_PARSER_CREATE_LISTITEM();
liAssignExpr = CTR_PARSER_CREATE_LISTITEM();
a->type = CTR_AST_NODE_EXPRASSIGNMENT;
a->nodes = li;
li->node = r;
assignmentExpr = ctr_cparse_expr(0);
liAssignExpr->node = assignmentExpr;
li->next = liAssignExpr;
return a;
}
/**
* CTRParserReturn
*
* Generates a node to represent a return from a block of code.
*/
ctr_tnode* ctr_cparse_ret() {
ctr_tlistitem* li;
ctr_tnode* r;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_RETURNFROMBLOCK;
li = CTR_PARSER_CREATE_LISTITEM();
r->nodes = li;
li->node = ctr_cparse_expr(0);
return r;
}
ctr_tnode* ctr_cparse_number() {
char* n;
ctr_tnode* r;
long l;
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_LTRNUM;
n = ctr_clex_tok_value();
l = ctr_clex_tok_value_length();
r->value = ctr_malloc(sizeof(char) * l, 0);
memcpy(r->value, n, l);
r->vlen = l;
return r;
}
/**
* CTRParserString
*
* Generates a node to represent a string.
*/
ctr_tnode* ctr_cparse_string() {
ctr_tnode* r;
char* n;
ctr_size vlen;
if (ctr_mode_debug) printf("Parsing STRING. \n");
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_LTRSTRING;
n = ctr_clex_readstr();
vlen = ctr_clex_tok_value_length();
r->value = ctr_malloc(sizeof(char) * vlen, 0);
memcpy(r->value, n, vlen);
r->vlen = vlen;
ctr_clex_tok(); /* eat trailing quote. */
return r;
}
/**
* CTRParserPOpen
*
* Generates a set of nested nodes.
*/
ctr_tnode* ctr_cparse_popen() {
ctr_tnode* r;
ctr_tlistitem* li;
int t;
ctr_clex_tok();
if (ctr_mode_debug) printf("Parsing paren open (.\n");
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_NESTED;
li = CTR_PARSER_CREATE_LISTITEM();
r->nodes = li;
li->node = ctr_cparse_expr(0);
t = ctr_clex_tok();
if (t != CTR_TOKEN_PARCLOSE) {
printf("Error, expected ). \n");
exit(1);
}
return r;
}
/**
* CTRParserBlock
*
* Generates a set of AST nodes to represent a block of code.
*/
ctr_tnode* ctr_cparse_block() {
ctr_tnode* r;
ctr_tlistitem* codeBlockPart1;
ctr_tlistitem* codeBlockPart2;
ctr_tnode* paramList;
ctr_tnode* codeList;
ctr_tlistitem* previousListItem;
ctr_tlistitem* previousCodeListItem;
int t;
int first;
if (ctr_mode_debug) printf("Parsing code block.\n");
ctr_clex_tok();
r = CTR_PARSER_CREATE_NODE();
r->type = CTR_AST_NODE_CODEBLOCK;
codeBlockPart1 = CTR_PARSER_CREATE_LISTITEM();
r->nodes = codeBlockPart1;
codeBlockPart2 = CTR_PARSER_CREATE_LISTITEM();
r->nodes->next = codeBlockPart2;
paramList = CTR_PARSER_CREATE_NODE();
codeList = CTR_PARSER_CREATE_NODE();
codeBlockPart1->node = paramList;
codeBlockPart2->node = codeList;
paramList->type = CTR_AST_NODE_PARAMLIST;
codeList->type = CTR_AST_NODE_INSTRLIST;
t = ctr_clex_tok();
first = 1;
while(t == CTR_TOKEN_REF) {
ctr_tlistitem* paramListItem = CTR_PARSER_CREATE_LISTITEM();
ctr_tnode* paramItem = CTR_PARSER_CREATE_NODE();
long l = ctr_clex_tok_value_length();
paramItem->value = ctr_malloc(sizeof(char) * l, 0);
memcpy(paramItem->value, ctr_clex_tok_value(), l);
paramItem->vlen = l;
paramListItem->node = paramItem;
if (first) {
paramList->nodes = paramListItem;
previousListItem = paramListItem;
first = 0;
} else {
previousListItem->next = paramListItem;
previousListItem = paramListItem;
}
t = ctr_clex_tok();
}
if (t != CTR_TOKEN_BLOCKPIPE) {
printf("Error expected blockpipe.");
exit(1);
}
t = ctr_clex_tok();
first = 1;
while((first || t == CTR_TOKEN_DOT)) {
ctr_tlistitem* codeListItem;
ctr_tnode* codeNode;
if (first) {
if (ctr_mode_debug) printf("First, so put back\n");
ctr_clex_putback();
}
t = ctr_clex_tok();
if (t == CTR_TOKEN_BLOCKCLOSE) break;
ctr_clex_putback();
codeListItem = CTR_PARSER_CREATE_LISTITEM();
codeNode = CTR_PARSER_CREATE_NODE();
if (ctr_mode_debug) printf("--------> %d %s \n", t, ctr_clex_tok_value());
if (t == CTR_TOKEN_RET) {
codeNode = ctr_cparse_ret();
} else {
codeNode = ctr_cparse_expr(0);
}
codeListItem->node = codeNode;
if (first) {
codeList->nodes = codeListItem;
previousCodeListItem = codeListItem;
first = 0;
} else {
previousCodeListItem->next = codeListItem;
previousCodeListItem = codeListItem;
}
t = ctr_clex_tok();
if (t != CTR_TOKEN_DOT) {
printf("Expected . but got: %d.\n", t);
exit(1);
}
}
return r;
}
/**
* CTRParserMessage
*
* Creates the AST nodes for sending a message.
*
* - precedence mode 0: no argument (allows processing of unary message, binary message and keyword message)
* - precedence mode 1: as argument of keyword message (allows processing of unary message and binary message)
* - precedence mode 2: as argument of binary message (only allows processing of unary message)
*/
ctr_tnode* ctr_cparse_message(int mode) {
long msgpartlen; /* length of part of message string */
ctr_tnode* m;
int t;
char* s;
char* msg;
ctr_tlistitem* li;
ctr_tlistitem* curlistitem;
int lookAhead;
int isBin;
int first;
ctr_size ulen;
t = ctr_clex_tok();
msgpartlen = ctr_clex_tok_value_length();
if ((msgpartlen) > 255) {
printf("Message too long\n");
exit(1);
}
m = CTR_PARSER_CREATE_NODE();
m->type = -1;
s = ctr_clex_tok_value();
msg = ctr_malloc(255*sizeof(char), 0);
memcpy(msg, s, msgpartlen);
ulen = ctr_getutf8len(msg, msgpartlen);
isBin = (ulen == 1);
if (mode == 2 && isBin) {
ctr_clex_putback();
return m;
}
if (isBin) {
if (ctr_mode_debug) printf("Parsing binary message: '%s' (mode: %d)\n", msg, mode);
m->type = CTR_AST_NODE_BINMESSAGE;
m->value = msg;
m->vlen = msgpartlen;
li = CTR_PARSER_CREATE_LISTITEM();
if (ctr_mode_debug) printf("Binary argument start..\n");
li->node = ctr_cparse_expr(2);
if (ctr_mode_debug) printf("Binary argument end..\n");
m->nodes = li;
return m;
}
lookAhead = ctr_clex_tok(); ctr_clex_putback();
if (lookAhead == CTR_TOKEN_COLON) {
if (mode > 0) {
ctr_clex_putback();
if (ctr_mode_debug) printf("> End of argument, next token: %s .\n", msg);
return m;
}
*(msg + msgpartlen) = ':';
msgpartlen += 1;
if ((msgpartlen) > 255) {
printf("Message too long\n");
exit(1);
}
if (ctr_mode_debug) printf("Message so far: %s\n", msg);
m->type = CTR_AST_NODE_KWMESSAGE;
t = ctr_clex_tok();
first = 1;
while(1) {
li = CTR_PARSER_CREATE_LISTITEM();
if (ctr_mode_debug) printf("Next arg, message so far: %s \n", msg);
li->node = ctr_cparse_expr(1);
if (ctr_mode_debug) printf("Argument of keyword message has been parsed.\n");
if (first) {
m->nodes = li;
curlistitem = m->nodes;
first = 0;
} else {
curlistitem->next = li;
curlistitem = li;
}
t = ctr_clex_tok();
if (ctr_mode_debug) printf("Next token after argument = %d \n", t);
if (t == CTR_TOKEN_DOT) break;
if (t == CTR_TOKEN_FIN) break;
if (t == CTR_TOKEN_CHAIN) break;
if (t == CTR_TOKEN_PARCLOSE) break;
if (t == CTR_TOKEN_REF) {
long l = ctr_clex_tok_value_length();
if ((msgpartlen + l) > 255) {
printf("Message too long\n");
exit(1);
}
memcpy( (msg+msgpartlen), ctr_clex_tok_value(), l);
msgpartlen = msgpartlen + l;
*(msg + msgpartlen) = ':';
msgpartlen ++;
t = ctr_clex_tok();
if (t != CTR_TOKEN_COLON) {
printf("Expected colon. %s \n",msg);
exit(1);
}
}
}
if (ctr_mode_debug) printf("Putting back.\n");
ctr_clex_putback(); /* not a colon so put back */
if (ctr_mode_debug) printf("Parsing keyword message: '%s' (mode: %d) \n", msg, mode);
m->value = msg;
m->vlen = msgpartlen;
} else {
m->type = CTR_AST_NODE_UNAMESSAGE;
m->value = msg;
m->vlen = msgpartlen;
if (ctr_mode_debug) printf("Parsing unary message: '%s' (mode: %d) token = %d \n", msg, mode, lookAhead);
}
return m;
}
