stmt_t parse_stmt_if(tokenizer_t t) {
char * filename = cur_tok(t).filename;
int line = cur_tok(t).line_num;
eat_it(t, TOK_IF);
eat_it(t, TOK_LPAREN);
expr_t e = parse_expr(t);
eat_it(t, TOK_RPAREN);
stmt_t th = parse_stmt(t);
stmt_t el = NULL;
if(cur_tok(t).kind == TOK_ELSE) {
eat_it(t, TOK_ELSE);
el = parse_stmt(t);
}
return mk_stmt_if(filename, line, e, th, el);
}
function parse_function(str_iter& iter) {
token cur_tok;
// str name;
// type return_ty;
function ret;
cur_tok = token::eat(iter, token_kind::identifier);
// name = cur_tok.data.identifier;
token::eat(iter, token_kind::open_paren);
token::eat(iter, token_kind::close_paren);
token::eat(iter, token_kind::skinny_arrow);
cur_tok = token::eat(iter, token_kind::identifier); /* return type */
// return_ty = resolve(cur_tok.data.identifier);
token::eat(iter, token_kind::open_brace);
// ret = function_new(name, return_ty);
while (1) {
statement cur_stmt;
switch ((cur_stmt = parse_stmt(iter)).kind) {
case Stmt_return: {
function_add_stmt(&ret, cur_stmt);
} break;
case Stmt_none: {
} return ret;
}
}
}
struct t_value * exec_stmt(struct t_exec *exec)
{
struct t_value *res;
struct t_token *token;
debug(1, "%s(): Calling parse_stmt()\n", __FUNCTION__);
if (parse_stmt(&exec->parser) < 0) {
res = NULL;
}
else {
debug(1, "%s(): Calling exec_run()\n", __FUNCTION__);
if (exec_run(exec) < 0) {
res = NULL;
}
else {
res = list_pop(&exec->stack);
}
}
token = parser_token(&exec->parser);
if (!res) {
while (token->type != TT_EOL && token->type != TT_EOF) {
token = parser_next(&exec->parser);
}
}
while (token->type == TT_EOL) {
token = parser_next(&exec->parser);
}
return res;
}
stmt_t parse_stmt_if(tokenizer_t t)
{
eat_it(t, TOK_IF);
eat_it(t, TOK_LPAREN);
expr_t e = parse_expr(t);
eat_it(t, TOK_RPAREN);
stmt_t body = parse_stmt(t);
stmt_t else_body = NULL;
if(cur_tok(t).kind == TOK_ELSE){
eat_it(t, TOK_ELSE);
else_body = parse_stmt(t);
}else{
// else はまだ空文
else_body = NULL;
}
return mk_stmt_if(t->filename, t->line, e, body, else_body);
}
stmt_t parse_stmt_while(tokenizer_t t) {
char *filename = cur_tok(t).filename;
int line_num = cur_tok(t).line_num;
eat_it(t, TOK_WHILE);
eat_it(t, TOK_LPAREN);
expr_t e = parse_expr(t);
eat_it(t, TOK_RPAREN);
stmt_t body = parse_stmt(t);
return mk_stmt_while(filename, line_num, e, body);
}
stmt_t parse_stmt_while(tokenizer_t t)
{
/** while(1) */
eat_it(t, TOK_WHILE);
eat_it(t, TOK_LPAREN);
expr_t e = parse_expr(t);
eat_it(t, TOK_RPAREN);
/** { ; ; ; } */
stmt_t body = parse_stmt(t);
return mk_stmt_while(t->filename, t->line, e, body);
}
void stmt_parse(Stmt* stmt)
{
Trace("stmt_parse");
assert(stmt_is_valid(stmt));
if (verbose >= VERB_VERBOSE)
printf("Parsing %s %d\n", stmt->filename, stmt->lineno);
parse_stmt(stmt);
stmt->node = code_get_root();
}
stmt_t parse_comp_stmt(tokenizer_t t) {
char * filename = cur_tok(t).filename;
int line = cur_tok(t).line_num;
eat_it(t, TOK_LBRACE);
stmt_list_t c = mk_stmt_list();
var_decl_list_t d = parse_var_decl(t);
stmt_t x;
while(cur_tok(t).kind != TOK_RBRACE) {
x = parse_stmt(t);
stmt_list_add(c, x);
}
eat_it(t, TOK_RBRACE);
return mk_stmt_compound(filename, line, d, c);
}
// Parse a program.
//
// program ::= stmt-list
// stmt-list ::= stmt ';' | stmt-list ';' stmt
//
Tree*
parse_program(Parser& p) {
Tree_seq* stmts = new Tree_seq();
while (not parse::end_of_stream(p)) {
// Parse the next statement...
if (Tree* s = parse_stmt(p))
stmts->push_back(s);
else
return nullptr;
// ... and it's trailing ';'
if (not parse::expect(p, semicolon_tok))
return nullptr;
}
return new Prog_tree(stmts);
}
void parse_stmts() {
switch(next_token.type) {
case TT_TYPE_DOUBLE:
case TT_TYPE_INT:
case TT_TYPE_STRING:
case TT_TYPE_AUTO:
case TT_IDENTIFICATOR:
case TT_KW_RETURN:
case TT_KW_COUT:
case TT_KW_CIN:
case TT_BLOCK_START:
case TT_KW_IF:
case TT_KW_FOR:
parse_stmt();
parse_stmts();
break;
default:
return;
}
}
stmt_t parse_stmt_compound(tokenizer_t t){
stmt_list_t list = mk_stmt_list();
var_decl_list_t decls = mk_var_decl_list();
eat_it(t, TOK_LBRACE);
// printf("var_decl_list_add begin\n");
// printf("call: parse_stmt_compound\n");
while(1){
// 型宣言じゃなかったら修了
if(cur_tok(t).kind != TOK_INT){
break;
}else{
// printf("var_decl_list_add\n");
var_decl_list_add(decls, parse_decl(t));
}
}
while(1){
if(cur_tok(t).kind != TOK_RBRACE){
// printf("stmt_list_add\n");
stmt_t s = parse_stmt(t);
stmt_list_add(list, s);
// printf("s->kind: %d\n", s->kind);
}else{
// } でリスト終了
break;
}
}
eat_it(t, TOK_RBRACE);
stmt_t comp = mk_stmt_compound(t->filename, t->line, decls, list);
return comp;
}
LoadTedrc(char *tedname, int depth, int kdefmapno)
{
FILE *fp;
char ss[8192],ibuf[2048],*tt,*uu,*vv,*ww,*xx;
int len,i,j,lno;
int hdef[128];
extern int X_inited;
KEYDEF *kdef=kdefmap[kdefmapno];
int kdefno=kdefno_m[kdefmapno];
if ((fp=init_tedrc_fname(tedname, depth))==NULL)
return 1;
if (kdefno && !depth) {
for(j=0;j<kdefno;j++) free(kdef[j].cmd);
if (!kdefmapno) free_lang();
free(kdef);
kdefmap[kdefmapno]=NULL;
if (kdefmapno) {
free(mode_str_m[kdefmapno]);
mode_str_m[kdefmapno]=NULL;
}
kdef=NULL;
}
#if 0
printf("-- %d %d %s\n",depth, kdefmapno, ftedrc);
#endif
if (kdef==NULL) {
MAX_KEY_DEF=280;
if ((kdef=mmalloc(sizeof(KEYDEF)*MAX_KEY_DEF,"LoadTedrc"))==NULL)
exit(1);
kdefmap[kdefmapno]=kdef;
kdefno_m[kdefmapno]=kdefno=0;
}
if (!depth) qsort(kmap,kname_no,sizeof(KEYMAP),qcmpxk);
tedrcfname=tedname;
lno=0;
while (!feof(fp)) {
int next_l;
ss[0]=0;
next_l=0;
for(;;) {
lno++;
len=mfgets(ibuf,sizeof(ibuf),fp);
if (!len) {
next_l=1;
break;
}
if (ibuf[len-1]=='\n') ibuf[--len]=0;
if (!len) {
next_l=1;
break;
}
while (len && (ibuf[len-1]==' '||ibuf[len-1]==9)) len--;
if (!len) {
next_l=1;
break;
}
if (ibuf[len-1]=='\\') {
ibuf[len-1]=0;
strcat(ss,ibuf);
} else {
strcat(ss,ibuf);
break;
}
}
if (next_l) continue;
tt=skip_spc(ss);
uu=to_spc(tt);
vv=skip_spc(uu);
*uu=0;
if (tt[0]=='#') continue;
if (!strcmp(tt,"d")) {
ww=to_spc(vv);
if (!(*vv)) lper(tedname,lno,"argument expected");
kdef[kdefno].klen=parse_key(tedname, lno,vv,ww,kdef[kdefno].kcode);
if ((i=kcode_exist(kdefno,kdef,kdefno))<kdefno)
free(kdef[i].cmd);
xx=skip_spc(ww);
kdef[i].cmd=strdup(parse_Cstr(tedname, lno,xx,&uu));
kdef[i].type=0;
if (i==kdefno) incr_kdefno(&kdef,kdefmapno,&kdefno);
continue;
} else
if (!strcmp(tt,"f")) {
ww=to_spc(vv);
if (!(*vv)) lper(tedname,lno,"argument expected");
kdef[kdefno].klen=parse_key(tedname, lno,vv,ww,kdef[kdefno].kcode);
if ((i=kcode_exist(kdefno,kdef,kdefno))<kdefno)
free(kdef[i].cmd);
xx=skip_spc(ww);
if (parse_stmt(tedname, lno,xx,&kdef[i].cmd,&kdef[i].type)) {
if (i==kdefno) incr_kdefno(&kdef,kdefmapno,&kdefno);
}
continue;
}
if (kdefmapno)
lper(tedname,lno,"%s for LoadKeyDefInto can accept 'f' and 'd' command only", tedname);
if (!strcmp(tt,"s")) {
ww=to_spc(vv);
xx=skip_spc(ww);
*ww=0;
for(i=0;i<sizeof(locolor)/sizeof(locolor[0]);i++)
if (!strcmp(vv,locolor[i].cname)) break;
if (i==sizeof(locolor)/sizeof(locolor[0]))
lper(tedname,lno,"Unknown Def color %s",vv);
ww=to_spc(xx);
*ww=0;
strcpy(locolor[i].caddr,xx);
} else
if (!strcmp(tt,"set")) {
ww=to_spc(vv);
xx=skip_spc(ww);
tt=to_spc(xx);
if (!(*ww)) lper(tedname,lno,"argument expected");
*ww=0;
for(i=0;i<sizeof(sets)/sizeof(sets[0]);i++)
if (!strcmp(sets[i].sname,vv)) break;
if (i==sizeof(sets)/sizeof(sets[0]))
lper2(tedname,lno,"Unknown set %s",vv);
else {
*tt=0;
*(sets[i].saddr)=atoi(xx);
}
} else
if (!strcmp(tt,"lang") && !depth) {
extern char DirectCommentChars[];
int keywcnt=3,LangIdx,ColIdx,AllocN=32,kwidx, MaxKeywordLen=0;
char *ff;
KW *kw;
if (depth)
p_err("cannot define 'lang' in include %s", tedname);
tt=parse_Cstr(tedname, lno,vv,&uu);
i=strlen(tt)+2;
if ((vv=mmalloc(i,"LoadTedrc"))==NULL) exit(1);
if ((kw=mmalloc(AllocN*sizeof(KW),"LoadTedrc 2"))==NULL) exit(1);
LangExt[LangN]=strcat(strcpy(vv,tt)," ");
kw[0].coloridx=ColorCnt;
strcpy(pc_color[ColorCnt].fg_str,getstr(uu,&vv));
strcpy(pc_color[ColorCnt++].bg_str,getstr(vv,&uu));
uu=skip_spc(uu);
DirectCommentChars[LangN]=*uu;
kw[1].coloridx=ColorCnt;
strcpy(pc_color[ColorCnt].fg_str,getstr(uu+1,&vv));
strcpy(pc_color[ColorCnt++].bg_str,getstr(vv,&uu));
kw[2].coloridx=ColorCnt;
strcpy(pc_color[ColorCnt].fg_str,getstr(uu+1,&vv));
strcpy(pc_color[ColorCnt++].bg_str,getstr(vv,&uu));
for(;;) {
if (!*uu) break;
strcpy(pc_color[ColorCnt].fg_str,getstr(uu+1,&vv));
strcpy(pc_color[ColorCnt].bg_str,getstr(vv,&uu));
uu=skip_spc(uu);
ww=tt=parse_Cstr(tedname, lno,uu,&vv);
uu=vv;
xx=tt+strlen(tt);
for(;;) {
char *pstr;
tt=to_spc(ww);
vv=skip_spc(tt);
*(tt)=0;
if (pstr=strchr(ww,'(')) {
kw[keywcnt].arg=strdup(pstr);
*pstr=0;
} else kw[keywcnt].arg=0;
kw[keywcnt].keyword=strdup(ww);
if (strlen(ww) > MaxKeywordLen) MaxKeywordLen=strlen(ww);
kw[keywcnt].coloridx=ColorCnt;
#if 0
printf("%d %d %d %s\n",LangN,keywcnt, ColorCnt,
kw[keywcnt].keyword);
#endif
keywcnt++;
if (keywcnt+3>=AllocN) {
AllocN+=32;
if ((kw=mrealloc(kw,AllocN*sizeof(KW),"LoadTedrc 3"))==NULL) exit(1);
}
ww=vv;
if (ww==xx) break;
}
ColorCnt++;
}
qsort(kw+3,keywcnt-3,sizeof(KW), kwcmp);
LangKw[LangN]=kw;
LangMaxKeywordLen[LangN]=MaxKeywordLen;
LangKwN[LangN++]=keywcnt;
if (LangN>=MaxLang) {
error("Too many languages defined");
error("Remove unused language in tedrc or modify ted.h and recompile");
exit(1);
}
} else
if (!strcmp(tt,"include")) {
if (depth > 10) {
error("include too many level ??");
continue;
}
ww=to_spc(vv);
xx=skip_spc(ww);
if (!(*vv)) lper(tedname,lno,"argument expected");
*ww=0;
LoadTedrc(vv,depth+1,kdefmapno);
tedrcfname=tedname;
} else
if (!strcmp(tt,"filebrowser")) {
ww=to_spc(vv);
xx=skip_spc(ww);
if (!(*vv)) lper(tedname,lno,"argument expected");
init_reg_exp(vv);
} else
if (!strcmp(tt,"fontlist")) {
ww=to_spc(vv);
xx=skip_spc(ww);
if (!(*vv)) lper(tedname,lno,"argument expected");
setFontList(vv);
} else
if (!strcmp(tt,"LoadKeyDefInto")) {
int no;
char mstr[16], *p;
tt=parse_Cstr(tedname, lno,vv,&uu);
if (!(*tt)) lper(tedname,lno,"file name expected");
ww=skip_spc(uu);
if (!*ww) lper(tedname,lno,"Bind number expected");
no=*ww-'0';
if (no<=0 || no>=4)
lper(tedname,lno,"Bind number must be less than 4 and greater than 0");
if ((p=strchr(tt,'.'))==NULL) {
mode_str_m[no]=" ";
} else {
p++;
if (! *p)
mode_str_m[no]=strdup(" ");
else
mode_str_m[no]=strdup(p);
}
LoadTedrc(tt,0,no);
}
}
fclose(fp);
if (!depth) {
kdefno=kdefno_m[kdefmapno];
qsort(kdef,kdefno,sizeof(kdef[0]),qcmp);
bzero(hdef,sizeof(hdef));
bzero(kdefhash[kdefmapno],128*sizeof(int));
for(i=0;i<kdefno;i++) {
j=KEYHASH(kdef[i].kcode[0]);
if (hdef[j]) continue;
hdef[j]=1;
kdefhash[kdefmapno][j]=i;
}
kdefhash[kdefmapno][127]=kdefno;
for(i=126;i>=0;i--)
if (!hdef[i]) kdefhash[kdefmapno][i]=kdefhash[kdefmapno][i+1];
ReLoadTed=1;
if (X_inited) alloc_pc_colors();
}
return 0;
}
/*------------------------------------------------------------------------- * Function: parse_stmt * * Purpose: Parses a statement which is a function name followed by * zero or more arguments. * * Return: Success: Ptr to parse tree. * * Failure: NIL, input consumed through end of line. * * Programmer: Robb Matzke * [email protected] * Dec 4 1996 * * Modifications: * * Robb Matzke, 11 Dec 1996 * If IMPLIED_PRINT is true then wrap the input in a call to the * `print' function if it isn't already obviously a call to `print'. * * Robb Matzke, 20 Jan 1997 * Turn off handling of SIGINT during parsing. * * Robb Matzke, 7 Feb 1997 * If the first thing on the line is a symbol which has a built in * function (BIF) as its f-value, and the BIF has the lex_special * property, then we call lex_special() to prepare the next token. * * Robb Matzke, 2000-06-28 * Signal handlers are registered with sigaction() since its behavior * is more consistent. * *------------------------------------------------------------------------- */ obj_t parse_stmt (lex_t *f, int implied_print) { char *lexeme, buf[1024], *s, *fmode; int tok, i; obj_t head=NIL, opstack=NIL, b1=NIL, retval=NIL, tmp=NIL; struct sigaction new_action, old_action; /* SIGINT should have the default action while we're parsing */ new_action.sa_handler = SIG_DFL; sigemptyset(&new_action.sa_mask); new_action.sa_flags = SA_RESTART; sigaction(SIGINT, &new_action, &old_action); tok = lex_token (f, &lexeme, false); /* * At the end of the file, return `(exit)'. */ if (TOK_EOF==tok) { lex_consume (f); if (f->f && isatty (fileno (f->f))) { printf ("exit\n"); retval = obj_new (C_CONS, obj_new (C_SYM, "exit"), NIL); goto done; } else { retval = obj_new (C_SYM, "__END__"); goto done; } } /* * For an empty line, eat the linefeed token and try again. */ if (TOK_EOL==tok) { lex_consume (f); retval = parse_stmt (f, implied_print); goto done; } /* * A statement begins with a function name. If the first token * is not a symbol then assume `print'. */ if (implied_print && TOK_SYM==tok) { head = obj_new (C_SYM, lexeme); if ((tmp=sym_fboundp (head))) { tmp = obj_dest (tmp); lex_consume (f); } else { obj_dest (head); head = obj_new (C_SYM, "print"); } } else if (implied_print) { head = obj_new (C_SYM, "print"); } else { head = &ErrorCell ; /*no function yet*/ } /* * Some functions take a weird first argument that isn't really a * normal token. Like `open' which wants the name of a file. We * call lex_special() to try to get such a token if it appears * next. */ if (head && &ErrorCell!=head && (tmp=sym_fboundp(head))) { if (bif_lex_special (tmp)) lex_special (f, false); tmp = obj_dest (tmp); } /* * Read the arguments... */ while (&ErrorCell!=(b1=parse_expr(f, false))) { opstack = obj_new(C_CONS, b1, opstack); } /* * Construct a function call which is the HEAD applied to the * arguments on the operand stack. */ b1 = F_reverse (opstack); opstack = obj_dest (opstack); if (&ErrorCell==head) { head = NIL; if (1==F_length(b1)) { retval = obj_copy (cons_head (b1), SHALLOW); b1 = obj_dest (b1); } else { retval = b1; b1 = NIL; } } else { retval = F_cons (head, b1); head = obj_dest (head); b1 = obj_dest (b1); } /* * A statement can end with `>' or `>>' followed by the name of * a file, or `|' followed by an unquoted shell command. Leading * and trailing white space is stripped from the file or command. */ tok = lex_token (f, &lexeme, false); if (TOK_RT==tok || TOK_RTRT==tok || TOK_PIPE==tok) { lex_consume (f); if (NULL==lex_gets (f, buf, sizeof(buf))) { out_errorn ("file name required after `%s' operator", lexeme); goto error; } lex_set (f, TOK_EOL, "\n"); for (s=buf; isspace(*s); s++) /*void*/; for (i=strlen(s)-1; i>=0 && isspace(s[i]); --i) s[i] = '\0'; if (!*s) { out_errorn ("file name required after `%s' operator", lexeme); goto error; } switch (tok) { case TOK_RT: lexeme = "Redirect"; fmode = "w"; break; case TOK_RTRT: lexeme = "Redirect"; fmode = "a"; break; case TOK_PIPE: lexeme = "Pipe"; fmode = "w"; break; default: abort(); } retval = obj_new (C_CONS, obj_new (C_SYM, lexeme), obj_new (C_CONS, retval, obj_new (C_CONS, obj_new (C_STR, s), obj_new (C_CONS, obj_new (C_STR, fmode), NIL)))); } /* * We should be at the end of a line. */ tok = lex_token (f, &lexeme, false); if (TOK_EOL!=tok && TOK_EOF!=tok) { s = lex_gets (f, buf, sizeof(buf)); if (s && strlen(s)>0 && '\n'==s[strlen(s)-1]) s[strlen(s)-1] = '\0'; out_errorn ("syntax error before: %s%s", lexeme, s?s:""); lex_consume(f); goto error; } else { lex_consume(f); } done: sigaction(SIGINT, &old_action, NULL); return retval; error: if (head) head = obj_dest (head); if (opstack) opstack = obj_dest (opstack); if (retval) retval = obj_dest (retval); sigaction(SIGINT, &old_action, NULL); return NIL; }
}
FOLD_EXPR(t->expr, t->symtab);
EAT(token_close_paren);
}
static stmt *parse_if(const struct stmt_ctx *const ctx)
{
stmt *t = stmt_new_wrapper(if, ctx->scope);
struct stmt_ctx subctx = *ctx;
EAT(token_if);
parse_test_init_expr(t, &subctx);
t->lhs = parse_stmt(&subctx);
if(accept(token_else))
t->rhs = parse_stmt(&subctx);
return t;
}
static stmt *parse_switch(const struct stmt_ctx *const ctx)
{
stmt *t = stmt_new_wrapper(switch, ctx->scope);
struct stmt_ctx subctx = *ctx;
subctx.break_target = t;
subctx.switch_target = t;