1088 lines
17 KiB
C
Executable file
1088 lines
17 KiB
C
Executable file
/*
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* a small awk clone
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*
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* (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
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*
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* Absolutely no warranty. Use this software with your own risk.
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*
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* Permission to use, copy, modify and distribute this software for any
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* purpose and without fee is hereby granted, provided that the above
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* copyright and disclaimer notice.
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*
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* This program was written to fit into 64K+64K memory of the Minix 1.2.
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*/
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#include <stdio.h>
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#include "awk.h"
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extern char *mkpat();
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extern char *cmd;
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extern char text[];
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extern char funnam[];
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extern int sym;
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extern int sym1;
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extern int regexflg;
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extern int funflg;
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extern int printflg;
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extern int getlineflg;
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extern SYMBOL *hashtab[], *funtab[];
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extern CELL *field[];
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char *emalloc(), *strsave();
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NODE *node0(), *node1(), *node2(), *node3(), *node4();
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NODE *stat(), *pastat();
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NODE *expr(), *expr1(), *expr2(), *expr3(), *expr4();
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NODE *expr5(), *expr6(), *expr7(), *expr8(), *expr9(), *expr10();
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NODE *doprint(), *dofuncn(), *doif(), *dowhile(), *dofor(), *body();
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NODE *doassign(), *dodo(), *doarray(), *doreturn(), *doelement();
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CELL *mkcell(), *getvar();
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CELL *execute(), *lookup();
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int forflg; /* parsing for(expr in array), inhibit 'expr in array' */
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int prmflg; /* parsing pass parameters */
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NODE *begin, *loop, *End;
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parse()
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{
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NODE *p, *q, *r, *stat();
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CELL *u;
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lex();
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skipeol();
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while (sym) {
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switch (sym) {
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case BEGIN:
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lex();
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begin = stat();
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break;
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case END:
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lex();
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if (End == NULL)
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End = stat();
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else {
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for (p = End; p; p = q) {
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if ((q = p->n_next) == NULL)
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p->n_next = stat();
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}
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}
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break;
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case FUNC:
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lex();
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dousrfun();
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break;
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default:
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q = loop = pastat();
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skipeol();
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while (sym && sym != BEGIN && sym != END && sym != FUNC) {
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r = pastat();
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q->n_next = r;
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q = r;
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skipeol();
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}
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break;
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}
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skipeol();
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}
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if (begin) {
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u = execute(begin);
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c_free(u);
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}
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if (End || loop)
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while (Getrec(NULL)) {
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if (loop) {
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u = execute(loop);
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c_free(u);
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}
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}
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if (End) {
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u = execute(End);
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c_free(u);
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}
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}
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#define MAXARG 100
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static char *argnam[MAXARG];
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static int narg;
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static
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dousrfun()
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{
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CELL *u;
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strcpy(funnam, text);
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u = getvar(text, funtab, FUN);
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lex();
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if (sym != '(')
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synerr("'(' expected");
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for (lex(); sym != ')'; narg++) {
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if (sym != IDENT)
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synerr("argument expected");
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argnam[narg] = strsave(text);
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lex();
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if (sym == ',')
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lex();
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}
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u->c_fval = (double) narg;
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lex();
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skipeol();
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funflg++;
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u->c_sval = (char *) stat();
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funflg--;
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if (narg > 0) {
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do {
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sfree(argnam[--narg]);
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} while (narg > 0);
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}
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skipeol();
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}
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isarg(s) char *s;
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{
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int i;
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if (narg > 0) {
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for (i = narg - 1; i >= 0; i--)
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if (strcmp(s, argnam[i]) == 0)
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break;
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}
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else
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i = -1;
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return i;
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}
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/*
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interactive()
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{
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NODE *p, *q;
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CELL *u;
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for (lex(); sym; lex()) {
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p = stat();
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if (p->n_type != PRINT && !iscntl(p->n_type)) {
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q = (NODE *) emalloc(sizeof(NODE) + sizeof(NODE *) * 4);
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q->n_type = PRINT;
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q->n_arg[0] = q->n_arg[1] = q->n_arg[3] = NULL;
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q->n_arg[2] = p;
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q->n_next = NULL;
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p = q;
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}
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u = execute(p);
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printf("[%g(%s)]\n", u->c_fval, u->c_sval);
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c_free(u);
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}
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closeall();
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exit(0);
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}
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*/
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static
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iscntl(t)
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{
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static int tab[] = {
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IF, DO, WHILE, FOR, JUMP, GETLINE, 0
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};
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int i;
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for (i = 0; tab[i]; i++)
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if (t == tab[i])
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break;
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return tab[i];
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}
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static NODE *
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pastat()
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{
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NODE *p, *q, *r;
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if (sym == '{') /* action only */
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p = stat();
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else { /* exp [, expr] [{ .. }] */
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p = expr();
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if (sym == ',') {
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lex();
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q = expr();
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}
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else
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q = NULL;
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if (sym && sym != EOL)
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r = stat();
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else
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r = node0(PRINT0);
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if (q)
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p = node3(P2STAT, p, q, r);
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else
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p = node2(P1STAT, p, r);
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}
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return p;
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}
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static NODE *
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stat()
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{
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NODE *p, *q, *r;
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CELL *u, *v;
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int op;
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/*printf("@stat(%d)(%s)\n", sym, text);*/
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while (sym == EOL)
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lex();
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switch(sym) {
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case PRINT:
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p = doprint(0);
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break;
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case PRINTF:
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p = doprint(FORMAT);
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break;
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case IF:
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p = doif();
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break;
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case WHILE:
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p = dowhile();
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break;
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case DO:
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p = dodo();
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break;
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case FOR:
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p = dofor();
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break;
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case RETURN:
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p = doreturn();
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break;
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case EXIT:
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p = node2(JUMP, (NODE *)sym, (NODE *)NULL);
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lex();
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if (sym == IDENT || sym == NUMBER || sym == ARG)
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p->n_arg[1] = expr();
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break;
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case BREAK: case CONTIN: case NEXT:
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p = node1(JUMP, (NODE *)sym);
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lex();
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break;
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case DELETE:
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lex();
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u = getvar(text, hashtab, ARR);
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if (Getc() != '[')
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synerr("'[' expected");
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p = doarray(u);
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p->n_type = DELETE;
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lex(); /* ']' */
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break;
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case '{':
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lex();
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skipeol();
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if (sym == '}')
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p = node0(NULPROC);
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else
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p = q = stat();
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skipeol();
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while (sym != '}') {
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r = stat();
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q->n_next = r;
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q = r;
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skipeol();
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}
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lex();
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break;
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default:
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p = expr();
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#if 0
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if (sym == BINOR) { /* expr | GETLINE */
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lex();
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if (sym != GETLINE)
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synerr("'GETLINE' expected");
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lex();
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if (sym == IDENT || sym == STRING || sym == ARG) {
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q = expr();
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}
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else
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q = NULL;
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p = node3(GETLINE, q, p, (NODE *)R_PIN);
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}
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#endif
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break;
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}
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if (p->n_type == VALUE)
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synerr("statement expected");
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return p;
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}
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static
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skipeol()
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{
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while (sym == EOL)
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lex();
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}
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static NODE *
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doprint(fmt)
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{
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NODE *p, *q, *r;
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CELL *u;
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int i, op;
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int n = 0;
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printflg++;
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lex();
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if (sym == '(')
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lex();
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if (sym != '}' && sym != ')' && sym != EOL && sym != R_OUT && sym != R_APD
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&& sym != R_POUT) {
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p = q = expr(); n++;
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while (sym == ',') {
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lex();
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skipeol();
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r = expr(); n++;
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q->n_next = r;
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q = r;
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}
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}
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if (sym == ')')
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lex();
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if (sym == R_OUT || sym == R_APD || sym == R_POUT) {
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op = sym;
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lex();
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/* q = expr10();*/
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q = expr(); /* 94-04-02 */
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}
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else
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q = (NODE *) (op = 0); /* stdout */
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printflg = 0;
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r = (NODE *) emalloc(sizeof(*r) + sizeof(r) * (n + 3));
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r->n_type = PRINT; /* convert list to arg */
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r->n_next = NULL;
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r->n_arg[0] = (NODE *) (op | fmt);
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r->n_arg[1] = q;
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if (n == 0) {
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p = node1(VALUE, (NODE *)field[0]);
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}
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for (i = 2; p != NULL; i++) {
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r->n_arg[i] = p;
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q = p->n_next;
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p->n_next = NULL;
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p = q;
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}
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r->n_arg[i] = NULL;
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return r;
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}
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static NODE *
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doif()
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{
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NODE *p, *q, *r;
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lex();
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if (sym != '(')
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synerr("'(' expected");
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lex();
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p = expr();
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if (sym != ')')
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synerr("')' expected");
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lex();
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skipeol();
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q = stat();
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skipeol();
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if (sym == ELSE) {
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lex();
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skipeol();
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r = stat();
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}
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else
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r = NULL;
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return node3(IF, p, q, r);
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}
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static NODE *
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dowhile()
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{
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NODE *p, *q;
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lex();
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if (sym != '(')
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synerr("'(' expected");
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lex();
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p = stat();
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if (sym != ')')
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synerr("')' expected");
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q = body();
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return node2(WHILE, p, q);
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}
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static NODE *
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dofor()
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{
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NODE *p, *q, *r, *s;
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CELL *u;
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int i;
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lex();
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if (sym != '(')
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synerr("'(' expected");
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lex();
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if (sym != EOL) {
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forflg++; /* inhibit parsing 'expr IN array' */
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p = expr();
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forflg = 0;
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}
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else
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p = NULL;
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if (sym == IN) {
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lex();
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if (sym == ARG) {
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/*
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printf("***FOR_IN_ARG(%d)***\n", sym);
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*/
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u = mkcell(POS, NULL, (double)sym1);
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q = node1(ARG, u);
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}
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else {
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u = getvar(text, hashtab, ARR);
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q = node1(VALUE, u);
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}
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lex();
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if (sym != ')')
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synerr("')' expected");
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lex();
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skipeol();
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s = stat();
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r = node3(FORIN, p, q, s);
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}
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else {
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if (sym != EOL)
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synerr("'in' or ';' expected");
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lex();
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if (sym != EOL)
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q = expr();
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else
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q = NULL;
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if (sym != EOL)
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synerr("';' expected");
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lex();
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if (sym != ')')
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r = expr();
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else
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r = NULL;
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if (sym != ')')
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synerr("')' expected");
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s = body();
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r = node4(FOR, p, q, r, s);
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}
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return r;
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}
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static NODE *
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body()
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{
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NODE *r;
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while ((sym = Getc()) == '\n' || sym == ' ' || sym == '\t')
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;
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if (sym == ';') {
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r = node0(NULPROC);
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lex();
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}
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else {
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Ungetc(sym);
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lex();
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r = stat();
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}
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return r;
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}
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static NODE *
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dodo()
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{
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NODE *p, *q;
|
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lex();
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skipeol();
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p = stat();
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skipeol();
|
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if (sym != WHILE)
|
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synerr("'while' expected");
|
|
lex();
|
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if (sym != '(')
|
|
synerr("'(' expected");
|
|
lex();
|
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q = stat();
|
|
if (sym != ')')
|
|
synerr("')' expected");
|
|
lex();
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return node2(DO, p, q);
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}
|
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|
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static NODE *
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doreturn()
|
|
{
|
|
NODE *p, *q, *r;
|
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int i, n = 0;
|
|
|
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if (lex() != EOL) {
|
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p = q = expr(); n++;
|
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while (sym == ',') {
|
|
lex(); skipeol();
|
|
r = expr(); n++;
|
|
q ->n_next = r;
|
|
q = r;
|
|
}
|
|
}
|
|
else
|
|
p = (NODE *)NULL;
|
|
|
|
r = (NODE *) emalloc(sizeof(*r) + sizeof (r) * (n + 1));
|
|
r->n_type = JUMP;
|
|
r->n_next = NULL;
|
|
r->n_arg[0] = (NODE *) RETURN;
|
|
for (i = 1; p != NULL; i++) {
|
|
r->n_arg[i] = p;
|
|
q = p->n_next;
|
|
p->n_next = NULL;
|
|
p = q;
|
|
}
|
|
r->n_arg[i] = NULL;
|
|
return r;
|
|
}
|
|
|
|
static NODE *
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expr()
|
|
{
|
|
NODE *p;
|
|
|
|
p = expr1();
|
|
if (isassign(sym))
|
|
p = doassign(sym, p);
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|
return p;
|
|
}
|
|
|
|
static isassign(sym)
|
|
{
|
|
return (sym == ASSIGN || sym == ADDEQ || sym == SUBEQ || sym == MULTEQ
|
|
|| sym == DIVEQ || sym == MODEQ || sym == POWEQ);
|
|
}
|
|
|
|
static NODE *
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|
doassign(op, p) NODE *p;
|
|
{ /* evaluate right to left */
|
|
NODE *q;
|
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|
lex();
|
|
q = expr();
|
|
if (isassign(sym))
|
|
q = doassign(sym, q);
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|
return node3(ASSIGN, (NODE *)op, p, q);
|
|
}
|
|
|
|
static NODE *
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|
expr1()
|
|
{
|
|
NODE *p, *q;
|
|
|
|
/*
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|
printf("expr1(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr2();
|
|
if (sym == '?') {
|
|
lex();
|
|
#if 0
|
|
q = stat();
|
|
if (sym != ':')
|
|
synerr("':' expected");
|
|
lex();
|
|
return node3(IF, p, q, stat());
|
|
#else
|
|
q = expr();
|
|
if (sym != ':')
|
|
synerr("':' expected");
|
|
lex();
|
|
return node3(IF, p, q, expr());
|
|
#endif
|
|
}
|
|
return p; /* 930213 */
|
|
}
|
|
|
|
static NODE *
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|
expr2()
|
|
{
|
|
NODE *p;
|
|
|
|
/*
|
|
printf("expr2(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr3();
|
|
while (sym == OR) {
|
|
lex();
|
|
skipeol();
|
|
p = node3(COND, (NODE *)OR, p, expr3());
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr3()
|
|
{
|
|
NODE *p;
|
|
|
|
/*
|
|
printf("expr3(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr4();
|
|
while (sym == AND) {
|
|
lex();
|
|
skipeol();
|
|
p = node3(COND, (NODE *)AND, p, expr4());
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr4()
|
|
{
|
|
NODE *p;
|
|
CELL *q;
|
|
int op;
|
|
|
|
/*
|
|
printf("expr4(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr5();
|
|
if (!forflg && sym == IN) {
|
|
lex();
|
|
q = getvar(text, hashtab, ARR);
|
|
lex();
|
|
return node2(IN, p, q);
|
|
}
|
|
while (sym == EQ || sym == NE || sym == LT || sym == LE || sym == GT
|
|
|| sym == GE || sym == MATCH || sym == NOMATCH) {
|
|
op = sym;
|
|
lex();
|
|
p = node3(COND, (NODE *)op, p, expr5());
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr5()
|
|
{
|
|
NODE *p, *q;
|
|
|
|
/*
|
|
printf("expr5(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr6();
|
|
while (iscat(sym)) {
|
|
q = expr6();
|
|
p = node2(CAT, p, q);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static iscat(sym)
|
|
{
|
|
static int ctab[] = {
|
|
ADD, SUB, MULT, DIV, MOD, INC, DEC, STRING, NUMBER, IDENT, '(',
|
|
MATHFUN, STRFUN, SPRINTF, '$', SUBST, ARG, CALL, 0
|
|
};
|
|
register int i, j;
|
|
|
|
for (i = 0; j = ctab[i]; i++)
|
|
if (sym == j)
|
|
break;
|
|
return j;
|
|
}
|
|
|
|
static NODE *
|
|
expr6()
|
|
{
|
|
register int sign = sym;
|
|
NODE *p, *q;
|
|
|
|
/*
|
|
printf("expr6(%d)(%s)\n", sym, text);
|
|
*/
|
|
if (sym == SUB || sym == ADD)
|
|
lex();
|
|
p = expr7();
|
|
if (sign == SUB)
|
|
p = node2(ARITH, (NODE *)UMINUS, p);
|
|
while (sym == ADD || sym == SUB) {
|
|
sign = sym;
|
|
lex();
|
|
q = expr7();
|
|
if (sign == ADD) {
|
|
p = node3(ARITH, (NODE *)ADD, p, q);
|
|
}
|
|
else if (sign == SUB) {
|
|
p = node3(ARITH, (NODE *)SUB, p, q);
|
|
}
|
|
else
|
|
synerr("'+' or '-' expected");
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr7()
|
|
{
|
|
register int op;
|
|
NODE *p, *q;
|
|
|
|
/*
|
|
printf("expr7(%d)(%s)\n", sym, text);
|
|
*/
|
|
p = expr8();
|
|
while (sym == MULT || sym == DIV || sym == MOD) {
|
|
op = sym;
|
|
lex();
|
|
q = expr8();
|
|
switch (op) {
|
|
case MULT: p = node3(ARITH, (NODE *)MULT, p, q); break;
|
|
case DIV: p = node3(ARITH, (NODE *)DIV, p, q); break;
|
|
case MOD: p = node3(ARITH, (NODE *)MOD, p, q); break;
|
|
default: synerr("'*', '/' or '%' expected"); break;
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr8()
|
|
{
|
|
NODE *p;
|
|
int op;
|
|
|
|
/*
|
|
printf("expr8(%d)(%s)\n", sym, text);
|
|
*/
|
|
if (sym == NOT) {
|
|
lex();
|
|
p = node2(COND, (NODE *)NOT, expr9());
|
|
}
|
|
else {
|
|
p = expr9();
|
|
if (sym == POWER) {
|
|
lex();
|
|
p = node3(ARITH, (NODE *)POWER, p, expr9());
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
expr9()
|
|
{
|
|
NODE *p, *q;
|
|
int op, sym0;
|
|
|
|
/*
|
|
printf("expr9(%d)(%s)\n", sym, text);
|
|
*/
|
|
if (op = isincdec(sym)) {
|
|
lex();
|
|
if (sym != IDENT && sym != ARG)
|
|
synerr("illegal '++/--' operator");
|
|
p = expr10();
|
|
p = node4(ARITH, (NODE *)INCDEC, p, (NODE *)op, (NODE *)PRE);
|
|
}
|
|
else {
|
|
sym0 = sym;
|
|
p = expr10();
|
|
if (op = isincdec(sym)) {
|
|
/*printf("POST(%d)(%d)(%s)\n", sym, sym0, text);*/
|
|
if (sym0 == IDENT || sym0 == ARG) {
|
|
p = node4(ARITH, (NODE *)INCDEC, p, (NODE *)op,
|
|
(NODE *)POST);
|
|
lex();
|
|
}
|
|
}
|
|
if (sym == BINOR) { /* | getline */
|
|
lex();
|
|
if (sym != GETLINE)
|
|
synerr("'GETLINE' expected");
|
|
lex();
|
|
if (sym == IDENT || sym == STRING || sym == ARG) {
|
|
q = expr();
|
|
}
|
|
else
|
|
q = NULL;
|
|
p = node3(GETLINE, q, p, (NODE *)R_PIN);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static isincdec(sym)
|
|
{
|
|
return sym == INC ? 1 : (sym == DEC ? -1 : 0);
|
|
}
|
|
|
|
static NODE *
|
|
expr10()
|
|
{
|
|
NODE *p, *q;
|
|
CELL *u, *v;
|
|
int op;
|
|
int c;
|
|
int gsave, psave;
|
|
double atof();
|
|
|
|
/*
|
|
printf("expr10(%d)(%s)\n", sym, text);
|
|
*/
|
|
switch (sym) {
|
|
case STRING:
|
|
u = mkcell(STR, text, 0.0);
|
|
goto g1;
|
|
case NUMBER:
|
|
u = mkcell(NUM, NULL, atof(text));
|
|
g1:
|
|
p = node1(VALUE, u);
|
|
lex();
|
|
break;
|
|
case IDENT: case ARG:
|
|
if ((c = Getc()) == '[') { /* array */
|
|
/* 940403 */
|
|
if (sym == ARG) {
|
|
u = (CELL *)emalloc(sizeof(CELL));
|
|
u = mkcell(POS, NULL, (double)sym1);
|
|
p = doarray(u);
|
|
}
|
|
else {
|
|
u = getvar(text, hashtab, ARR);
|
|
p = doarray(u);
|
|
}
|
|
}
|
|
else {
|
|
Ungetc(c);
|
|
if (sym == ARG) {
|
|
u = mkcell(POS, NULL, (double)sym1);
|
|
p = node1(ARG, u);
|
|
}
|
|
else { /* symple variable */
|
|
u = getvar(text, hashtab, VAR|STR|NUM);
|
|
p = node1(VALUE, u);
|
|
}
|
|
}
|
|
lex();
|
|
break;
|
|
case '(':
|
|
/* print >(x ? y : z) needs this */
|
|
gsave = getlineflg; psave = printflg;
|
|
getlineflg = printflg = 0;
|
|
lex();
|
|
p = expr();
|
|
if (sym == ',') /* (expr, expr, .. ) */
|
|
p = doelement(p);
|
|
if (sym != ')')
|
|
synerr("')' expected");
|
|
getlineflg = gsave; printflg = psave;
|
|
lex();
|
|
break;
|
|
case CALL:
|
|
p = dofuncn(sym, getvar(text, funtab, UDF));
|
|
break;
|
|
case MATHFUN: case STRFUN: case SUBST:
|
|
p = dofuncn(sym, (CELL *)sym1);
|
|
break;
|
|
case SPRINTF:
|
|
p = doprint(FORMAT|STROUT);
|
|
break;
|
|
case '$':
|
|
lex();
|
|
switch (sym) {
|
|
case NUMBER:
|
|
u = mkcell(NUM, NULL, atof(text));
|
|
p = node1(VALUE, u);
|
|
p = node1(FIELD, p);
|
|
lex();
|
|
break;
|
|
case IDENT: case ARG: case '(':
|
|
p = node1(FIELD, expr10());
|
|
break;
|
|
default:
|
|
synerr("number or identifier expected after '$'", (char *)0);
|
|
}
|
|
break;
|
|
case DIV:
|
|
regexflg++;
|
|
lex();
|
|
regexflg = 0;
|
|
u = mkcell(PAT, NULL, 0.0);
|
|
u->c_sval = (char *) mkpat(text);
|
|
p = node1(VALUE, u);
|
|
lex();
|
|
break;
|
|
case GETLINE:
|
|
getlineflg++;
|
|
lex();
|
|
if (sym == IDENT || sym == STRING || sym == ARG)
|
|
q = expr10(); /* read into var */
|
|
else
|
|
q = NULL;
|
|
getlineflg = 0;
|
|
if (sym == R_IN) {
|
|
op = R_IN;
|
|
lex();
|
|
p = expr10();
|
|
}
|
|
else
|
|
op = (int) (p = NULL);
|
|
p = node3(GETLINE, q, p, (NODE *)op);
|
|
break;
|
|
default:
|
|
synerr(
|
|
"identifier, number, string, argument, regexpr, call or '(' expected");
|
|
break;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
dofuncn(fun, op) CELL *op;
|
|
{
|
|
NODE *p;
|
|
int i, j;
|
|
int n = 0;
|
|
NODE *a[100];
|
|
|
|
if (lex() == '(') {
|
|
prmflg++;
|
|
for (lex(); sym && (sym != ')'); n++) {
|
|
if ((int)op == SPLIT && n == 1) {
|
|
/*
|
|
printf("sym(%d)sym1(%d)(%d)\n", sym, sym1, isarg(text));
|
|
*/
|
|
if (sym != ARG) { /*isarg(text) == -1*/
|
|
/* make an array if not exist */
|
|
prmflg = 0;
|
|
getvar(text, hashtab, ARR);
|
|
prmflg++;
|
|
}
|
|
}
|
|
a[n] = expr();
|
|
if (sym == ',')
|
|
lex();
|
|
else if (sym != ')')
|
|
synerr("',' or ')' expected");
|
|
}
|
|
prmflg = 0;
|
|
|
|
if (sym == ')')
|
|
lex();
|
|
else
|
|
synerr("')' expected");
|
|
}
|
|
p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * (n + 2));
|
|
p->n_type = fun;
|
|
p->n_next = NULL;
|
|
p->n_arg[0] = (NODE *) op;
|
|
p->n_arg[1] = (NODE *) n;
|
|
for (i = 0, j = 2; i < n; )
|
|
p->n_arg[j++] = a[i++];
|
|
p->n_arg[j] = NULL;
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
doarray(u) CELL *u;
|
|
{
|
|
NODE *p;
|
|
int i, j;
|
|
int n;
|
|
NODE *a[20];
|
|
|
|
for (lex(), n = 0; sym && sym != ']'; n++) {
|
|
a[n] = expr();
|
|
if (sym == ',')
|
|
lex();
|
|
}
|
|
if (sym != ']')
|
|
synerr("']' expected");
|
|
/* left ']' for expr10() */
|
|
p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * (n + 1));
|
|
p->n_type = ARRAY;
|
|
p->n_next = NULL;
|
|
p->n_arg[0] = (NODE *)u;
|
|
p->n_arg[1] = (NODE *) n;
|
|
for (i = 0, j = 2; i < n; )
|
|
p->n_arg[j++] = a[i++];
|
|
return p;
|
|
}
|
|
|
|
static NODE *
|
|
doelement(q) NODE *q;
|
|
{
|
|
NODE *p;
|
|
int i, j;
|
|
int n;
|
|
NODE *a[20];
|
|
|
|
a[0] = q;
|
|
for (lex(), n = 1; sym && sym != ')'; n++) {
|
|
a[n] = expr();
|
|
if (sym == ',')
|
|
lex();
|
|
else if (sym != ')')
|
|
synerr("',' or ')' expected");
|
|
}
|
|
/* left ')' for expr10() */
|
|
p = (NODE *) emalloc(sizeof(*p) + sizeof(p) * (n + 1));
|
|
p->n_type = ELEMENT;
|
|
p->n_next = NULL;
|
|
p->n_arg[0] = NULL;
|
|
p->n_arg[1] = (NODE *) n;
|
|
for (i = 0, j = 2; i < n; )
|
|
p->n_arg[j++] = a[i++];
|
|
return p;
|
|
}
|
|
|
|
synerr(s, t) char *s, *t;
|
|
{
|
|
extern int lineno;
|
|
extern char line[], *linep;
|
|
int c, i;
|
|
char *u, *v;
|
|
|
|
fprintf(stderr, "%s: Syntax error at line %d", cmd, lineno);
|
|
if (funflg)
|
|
fprintf(stderr, " in function %s", funnam);
|
|
fprintf(stderr, ":\n");
|
|
if ((v = linep - 1) < line)
|
|
v = line + BUFSIZ - 1;
|
|
for (i = 0, u = v - 1; ; --u) {
|
|
if (u < line) {
|
|
if (line[BUFSIZ - 1] == '\0')
|
|
break;
|
|
u = line + BUFSIZ - 1;
|
|
}
|
|
if (*u == '\n' && ++i == 2)
|
|
break;
|
|
}
|
|
if (u != v) {
|
|
while (u != v) {
|
|
fputc(*u, stderr);
|
|
if ((++u - line) == BUFSIZ)
|
|
u = line;
|
|
}
|
|
if (*u != '\n')
|
|
fputc(*u, stderr);
|
|
fprintf(stderr, " <--\n\n");
|
|
/*
|
|
fprintf(stderr, " <-- ");
|
|
while ((c = Getc()) != EOF && c != '\n')
|
|
fputc(c, stderr);
|
|
fprintf(stderr, "\n");
|
|
if (c == EOF);
|
|
fprintf(stderr, "\n");
|
|
*/
|
|
}
|
|
fprintf(stderr, s, t);
|
|
fprintf(stderr, "\n");
|
|
#ifdef DOS
|
|
closeall();
|
|
#endif
|
|
exit(1);
|
|
}
|