+++ /dev/null
-/* $NetBSD: scanner.c,v 1.5 1998/08/25 20:59:43 ross Exp $ */
-
-/*
- * Copyright (c) 1983, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Edward Wang at The University of California, Berkeley.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)scanner.c 8.1 (Berkeley) 6/6/93";
-#else
-__RCSID("$NetBSD: scanner.c,v 1.5 1998/08/25 20:59:43 ross Exp $");
-#endif
-#endif /* not lint */
-
-#include "defs.h"
-#include "token.h"
-#include "context.h"
-#include "window_string.h"
-
-int s_getc __P((void));
-int s_gettok1 __P((void));
-int s_ungetc __P((int));
-
-int
-s_getc()
-{
- int c;
-
- switch (cx.x_type) {
- case X_FILE:
- c = getc(cx.x_fp);
- if (cx.x_bol && c != EOF) {
- cx.x_bol = 0;
- cx.x_lineno++;
- }
- if (c == '\n')
- cx.x_bol = 1;
- return c;
- case X_BUF:
- if (*cx.x_bufp != 0)
- return *cx.x_bufp++ & 0xff;
- else
- return EOF;
- }
- /*NOTREACHED*/
- return(0); /* XXX: placate gcc */
-}
-
-int
-s_ungetc(c)
- int c;
-{
- if (c == EOF)
- return EOF;
- switch (cx.x_type) {
- case X_FILE:
- cx.x_bol = 0;
- return ungetc(c, cx.x_fp);
- case X_BUF:
- if (cx.x_bufp > cx.x_buf)
- return *--cx.x_bufp = c;
- else
- return EOF;
- }
- /*NOTREACHED*/
- return(0); /* XXX: placate gcc */
-}
-
-int
-s_gettok()
-{
- char buf[100];
- char *p = buf;
- int c;
- int state = 0;
-
-loop:
- c = s_getc();
- switch (state) {
- case 0:
- switch (c) {
- case ' ':
- case '\t':
- break;
- case '\n':
- case ';':
- cx.x_token = T_EOL;
- state = -1;
- break;
- case '#':
- state = 1;
- break;
- case EOF:
- cx.x_token = T_EOF;
- state = -1;
- break;
- case 'a': case 'b': case 'c': case 'd': case 'e':
- case 'f': case 'g': case 'h': case 'i': case 'j':
- case 'k': case 'l': case 'm': case 'n': case 'o':
- case 'p': case 'q': case 'r': case 's': case 't':
- case 'u': case 'v': case 'w': case 'x': case 'y':
- case 'z':
- case 'A': case 'B': case 'C': case 'D': case 'E':
- case 'F': case 'G': case 'H': case 'I': case 'J':
- case 'K': case 'L': case 'M': case 'N': case 'O':
- case 'P': case 'Q': case 'R': case 'S': case 'T':
- case 'U': case 'V': case 'W': case 'X': case 'Y':
- case 'Z':
- case '_': case '.':
- *p++ = c;
- state = 2;
- break;
- case '"':
- state = 3;
- break;
- case '\'':
- state = 4;
- break;
- case '\\':
- switch (c = s_gettok1()) {
- case -1:
- break;
- case -2:
- state = 0;
- break;
- default:
- *p++ = c;
- state = 2;
- }
- break;
- case '0':
- cx.x_val.v_num = 0;
- state = 10;
- break;
- case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- cx.x_val.v_num = c - '0';
- state = 11;
- break;
- case '>':
- state = 20;
- break;
- case '<':
- state = 21;
- break;
- case '=':
- state = 22;
- break;
- case '!':
- state = 23;
- break;
- case '&':
- state = 24;
- break;
- case '|':
- state = 25;
- break;
- case '$':
- state = 26;
- break;
- case '~':
- cx.x_token = T_COMP;
- state = -1;
- break;
- case '+':
- cx.x_token = T_PLUS;
- state = -1;
- break;
- case '-':
- cx.x_token = T_MINUS;
- state = -1;
- break;
- case '*':
- cx.x_token = T_MUL;
- state = -1;
- break;
- case '/':
- cx.x_token = T_DIV;
- state = -1;
- break;
- case '%':
- cx.x_token = T_MOD;
- state = -1;
- break;
- case '^':
- cx.x_token = T_XOR;
- state = -1;
- break;
- case '(':
- cx.x_token = T_LP;
- state = -1;
- break;
- case ')':
- cx.x_token = T_RP;
- state = -1;
- break;
- case ',':
- cx.x_token = T_COMMA;
- state = -1;
- break;
- case '?':
- cx.x_token = T_QUEST;
- state = -1;
- break;
- case ':':
- cx.x_token = T_COLON;
- state = -1;
- break;
- case '[':
- cx.x_token = T_LB;
- state = -1;
- break;
- case ']':
- cx.x_token = T_RB;
- state = -1;
- break;
- default:
- cx.x_val.v_num = c;
- cx.x_token = T_CHAR;
- state = -1;
- break;
- }
- break;
- case 1: /* got # */
- if (c == '\n' || c == EOF) {
- (void) s_ungetc(c);
- state = 0;
- }
- break;
- case 2: /* unquoted string */
- switch (c) {
- case 'a': case 'b': case 'c': case 'd': case 'e':
- case 'f': case 'g': case 'h': case 'i': case 'j':
- case 'k': case 'l': case 'm': case 'n': case 'o':
- case 'p': case 'q': case 'r': case 's': case 't':
- case 'u': case 'v': case 'w': case 'x': case 'y':
- case 'z':
- case 'A': case 'B': case 'C': case 'D': case 'E':
- case 'F': case 'G': case 'H': case 'I': case 'J':
- case 'K': case 'L': case 'M': case 'N': case 'O':
- case 'P': case 'Q': case 'R': case 'S': case 'T':
- case 'U': case 'V': case 'W': case 'X': case 'Y':
- case 'Z':
- case '_': case '.':
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- break;
- case '"':
- state = 3;
- break;
- case '\'':
- state = 4;
- break;
- case '\\':
- switch (c = s_gettok1()) {
- case -2:
- (void) s_ungetc(' ');
- case -1:
- break;
- default:
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- }
- break;
- default:
- (void) s_ungetc(c);
- case EOF:
- *p = 0;
- cx.x_token = T_STR;
- switch (*buf) {
- case 'i':
- if (buf[1] == 'f' && buf[2] == 0)
- cx.x_token = T_IF;
- break;
- case 't':
- if (buf[1] == 'h' && buf[2] == 'e'
- && buf[3] == 'n' && buf[4] == 0)
- cx.x_token = T_THEN;
- break;
- case 'e':
- if (buf[1] == 'n' && buf[2] == 'd'
- && buf[3] == 'i' && buf[4] == 'f'
- && buf[5] == 0)
- cx.x_token = T_ENDIF;
- else {
- if (buf[1] == 'l' && buf[2] == 's') {
- if (buf[3] == 'i'
- && buf[4] == 'f'
- && buf[5] == 0)
- cx.x_token = T_ELSIF;
- else {
- if (buf[3] == 'e'
- && buf[4] == 0)
- cx.x_token =
- T_ELSE;
- }
- }
- }
- break;
- }
- if (cx.x_token == T_STR
- && (cx.x_val.v_str = str_cpy(buf)) == 0) {
- p_memerror();
- cx.x_token = T_EOF;
- }
- state = -1;
- break;
- }
- break;
- case 3: /* " quoted string */
- switch (c) {
- case '\n':
- (void) s_ungetc(c);
- case EOF:
- case '"':
- state = 2;
- break;
- case '\\':
- switch (c = s_gettok1()) {
- case -1:
- case -2: /* newlines are invisible */
- break;
- default:
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- }
- break;
- default:
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- break;
- }
- break;
- case 4: /* ' quoted string */
- switch (c) {
- case '\n':
- (void) s_ungetc(c);
- case EOF:
- case '\'':
- state = 2;
- break;
- case '\\':
- switch (c = s_gettok1()) {
- case -1:
- case -2: /* newlines are invisible */
- break;
- default:
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- }
- break;
- default:
- if (p < buf + sizeof buf - 1)
- *p++ = c;
- break;
- }
- break;
- case 10: /* got 0 */
- switch (c) {
- case 'x':
- case 'X':
- cx.x_val.v_num = 0;
- state = 12;
- break;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7':
- cx.x_val.v_num = c - '0';
- state = 13;
- break;
- case '8': case '9':
- cx.x_val.v_num = c - '0';
- state = 11;
- break;
- default:
- (void) s_ungetc(c);
- state = -1;
- cx.x_token = T_NUM;
- }
- break;
- case 11: /* decimal number */
- switch (c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- cx.x_val.v_num = cx.x_val.v_num * 10 + c - '0';
- break;
- default:
- (void) s_ungetc(c);
- state = -1;
- cx.x_token = T_NUM;
- }
- break;
- case 12: /* hex number */
- switch (c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- cx.x_val.v_num = cx.x_val.v_num * 16 + c - '0';
- break;
- case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
- cx.x_val.v_num = cx.x_val.v_num * 16 + c - 'a' + 10;
- break;
- case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
- cx.x_val.v_num = cx.x_val.v_num * 16 + c - 'A' + 10;
- break;
- default:
- (void) s_ungetc(c);
- state = -1;
- cx.x_token = T_NUM;
- }
- break;
- case 13: /* octal number */
- switch (c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7':
- cx.x_val.v_num = cx.x_val.v_num * 8 + c - '0';
- break;
- default:
- (void) s_ungetc(c);
- state = -1;
- cx.x_token = T_NUM;
- }
- break;
- case 20: /* got > */
- switch (c) {
- case '=':
- cx.x_token = T_GE;
- state = -1;
- break;
- case '>':
- cx.x_token = T_RS;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_GT;
- state = -1;
- }
- break;
- case 21: /* got < */
- switch (c) {
- case '=':
- cx.x_token = T_LE;
- state = -1;
- break;
- case '<':
- cx.x_token = T_LS;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_LT;
- state = -1;
- }
- break;
- case 22: /* got = */
- switch (c) {
- case '=':
- cx.x_token = T_EQ;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_ASSIGN;
- state = -1;
- }
- break;
- case 23: /* got ! */
- switch (c) {
- case '=':
- cx.x_token = T_NE;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_NOT;
- state = -1;
- }
- break;
- case 24: /* got & */
- switch (c) {
- case '&':
- cx.x_token = T_ANDAND;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_AND;
- state = -1;
- }
- break;
- case 25: /* got | */
- switch (c) {
- case '|':
- cx.x_token = T_OROR;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_OR;
- state = -1;
- }
- break;
- case 26: /* got $ */
- switch (c) {
- case '?':
- cx.x_token = T_DQ;
- state = -1;
- break;
- default:
- (void) s_ungetc(c);
- cx.x_token = T_DOLLAR;
- state = -1;
- }
- break;
- default:
- abort();
- }
- if (state >= 0)
- goto loop;
- return cx.x_token;
-}
-
-int
-s_gettok1()
-{
- int c;
- int n;
-
- c = s_getc(); /* got \ */
- switch (c) {
- case EOF:
- return -1;
- case '\n':
- return -2;
- case 'b':
- return '\b';
- case 'f':
- return '\f';
- case 'n':
- return '\n';
- case 'r':
- return '\r';
- case 't':
- return '\t';
- default:
- return c;
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7':
- break;
- }
- n = c - '0';
- c = s_getc(); /* got \[0-7] */
- if (c < '0' || c > '7') {
- (void) s_ungetc(c);
- return n;
- }
- n = n * 8 + c - '0';
- c = s_getc(); /* got \[0-7][0-7] */
- if (c < '0' || c > '7') {
- (void) s_ungetc(c);
- return n;
- }
- return n * 8 + c - '0';
-}
projects / apple / shell_cmds.git / blobdiff