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287 lines
8.1 KiB
Plaintext
287 lines
8.1 KiB
Plaintext
%x string name charmap defn nchar subs subs2
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%{
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/*-
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* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
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* at Electronni Visti IA, Kiev, Ukraine.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <ctype.h>
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#include <err.h>
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#include <limits.h>
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#include <unistd.h>
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#include <string.h>
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#include <sysexits.h>
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#include "common.h"
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#include "y.tab.h"
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int line_no = 1, save_no, fromsubs;
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u_char buf[BUFSIZE], *ptr;
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FILE *map_fp;
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YY_BUFFER_STATE main_buf, map_buf;
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#ifdef FLEX_DEBUG
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YYSTYPE yylval;
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#endif /* FLEX_DEBUG */
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int yylex(void);
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%}
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%%
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<INITIAL,charmap,nchar,subs,subs2>[ \t]+ ;
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<subs2>\" { ptr = buf; BEGIN(string); }
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<subs>\< { ptr = buf; fromsubs = 1; BEGIN(name); }
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<INITIAL>\< { ptr = buf; fromsubs = 0; BEGIN(name); }
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^#.*\n line_no++;
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^\n line_no++;
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<INITIAL>\\\n line_no++;
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<INITIAL,nchar,subs>\\t { yylval.ch = '\t'; return CHAR; }
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<INITIAL,nchar,subs>\\n { yylval.ch = '\n'; return CHAR; }
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<INITIAL,nchar,subs>\\b { yylval.ch = '\b'; return CHAR; }
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<INITIAL,nchar,subs>\\f { yylval.ch = '\f'; return CHAR; }
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<INITIAL,nchar,subs>\\v { yylval.ch = '\v'; return CHAR; }
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<INITIAL,nchar,subs>\\r { yylval.ch = '\r'; return CHAR; }
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<INITIAL,nchar,subs>\\a { yylval.ch = '\a'; return CHAR; }
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<subs2>\n {
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line_no++;
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BEGIN(INITIAL);
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return '\n';
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}
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<INITIAL,nchar>\n {
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line_no++;
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if (map_fp != NULL) {
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ptr = buf;
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BEGIN(defn);
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}
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return '\n';
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}
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<INITIAL>[;,{}()] return *yytext;
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<INITIAL>substitute { BEGIN(subs); return SUBSTITUTE; }
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<subs>with { BEGIN(subs2); return WITH; }
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<INITIAL>order return ORDER;
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<INITIAL>charmap BEGIN(charmap);
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<INITIAL>;[ \t]*\.\.\.[ \t]*; return RANGE;
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<INITIAL,nchar,subs>\\[0-7]{3} {
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u_int v;
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sscanf(&yytext[1], "%o", &v);
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yylval.ch = (u_char)v;
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return CHAR;
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}
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<INITIAL,nchar,subs>\\x[0-9a-fA-F]{2} {
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u_int v;
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sscanf(&yytext[2], "%x", &v);
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yylval.ch = (u_char)v;
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return CHAR;
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}
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<INITIAL,nchar,subs>\\. { yylval.ch = yytext[1]; return CHAR; }
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<INITIAL,nchar,subs>. { yylval.ch = *yytext; return CHAR; }
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<defn>^#.*\n line_no++;
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<defn>[ \t]+ {
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if (ptr == buf)
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errx(EX_UNAVAILABLE, "map expected near line %u of %s",
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line_no, map_name);
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*ptr = '\0';
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strcpy(yylval.str, buf);
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BEGIN(nchar);
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return DEFN;
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}
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<name>\/\/ {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "name buffer overflow near line %u, character '/'",
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line_no);
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*ptr++ = '/';
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}
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<name>\/\> {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "name buffer overflow near line %u, character '>'",
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line_no);
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*ptr++ = '>';
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}
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<string>\\\" {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\"'",
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line_no);
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*ptr++ = '"';
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}
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<name>\> {
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u_int i;
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if (ptr == buf)
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errx(EX_UNAVAILABLE, "non-empty name expected near line %u",
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line_no);
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*ptr = '\0';
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for (i = 0; i <= UCHAR_MAX; i++) {
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if (strcmp(charmap_table[i], buf) == 0)
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goto findit;
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}
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errx(EX_UNAVAILABLE, "name <%s> not 'charmap'-defined near line %u",
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buf, line_no);
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findit:
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yylval.ch = i;
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if (fromsubs)
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BEGIN(subs);
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else
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BEGIN(INITIAL);
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return CHAR;
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}
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<string>\" {
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*ptr = '\0';
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strcpy(yylval.str, buf);
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BEGIN(subs2);
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return STRING;
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}
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<name,defn>. {
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const char *s = (map_fp != NULL) ? map_name : "input";
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if (!isascii(*yytext) || !isprint(*yytext))
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errx(EX_UNAVAILABLE, "non-ASCII or non-printable character 0x%02x not allowed in the map/name near line %u of %s",
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*yytext, line_no, s);
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "map/name buffer overflow near line %u of %s, character '%c'",
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line_no, s, *yytext);
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*ptr++ = *yytext;
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}
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<string>\\t {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\t'",
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line_no);
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*ptr++ = '\t';
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}
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<string>\\b {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\b'",
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line_no);
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*ptr++ = '\b';
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}
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<string>\\f {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\f'",
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line_no);
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*ptr++ = '\f';
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}
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<string>\\v {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\v'",
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line_no);
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*ptr++ = '\v';
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}
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<string>\\n {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\n'",
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line_no);
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*ptr++ = '\n';
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}
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<string>\\r {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\r'",
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line_no);
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*ptr++ = '\r';
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}
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<string>\\a {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\a'",
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line_no);
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*ptr++ = '\a';
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}
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<name,string,defn>\n {
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const char *s = (map_fp != NULL) ? map_name : "input";
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errx(EX_UNAVAILABLE, "unterminated map/name/string near line %u of %s", line_no, s);
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}
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<name,string,nchar><<EOF>> {
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const char *s = (map_fp != NULL) ? map_name : "input";
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errx(EX_UNAVAILABLE, "premature EOF in the name/string/char near line %u of %s", line_no, s);
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}
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<string>\\x[0-9a-f]{2} {
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u_int v;
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sscanf(&yytext[2], "%x", &v);
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*ptr++ = (u_char)v;
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}
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<string>\\[0-7]{3} {
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u_int v;
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sscanf(&yytext[1], "%o", &v);
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*ptr++ = (u_char)v;
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}
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<string>\\. {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '%c'",
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line_no, yytext[1]);
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*ptr++ = yytext[1];
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}
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<string>. {
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if(ptr >= buf + sizeof(buf) - 1)
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errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '%c'",
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line_no, *yytext);
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*ptr++ = *yytext;
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}
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<charmap>[^ \t\n]+ {
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strcat(map_name, "/");
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strcat(map_name, yytext);
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if((map_fp = fopen(map_name, "r")) == NULL)
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err(EX_UNAVAILABLE, "can't open 'charmap' file %s",
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map_name);
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save_no = line_no;
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line_no = 1;
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map_buf = yy_new_buffer(map_fp, YY_BUF_SIZE);
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main_buf = YY_CURRENT_BUFFER;
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yy_switch_to_buffer(map_buf);
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ptr = buf;
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BEGIN(defn);
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}
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<charmap>\n {
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errx(EX_UNAVAILABLE, "'charmap' file name expected near line %u",
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line_no);
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}
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<charmap><<EOF>> {
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errx(EX_UNAVAILABLE, "'charmap' file name expected near line %u",
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line_no);
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}
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<INITIAL,defn><<EOF>> {
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if(map_fp != NULL) {
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if (ptr != buf)
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errx(EX_UNAVAILABLE, "premature EOF in the map near line %u of %s", line_no, map_name);
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yy_switch_to_buffer(main_buf);
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yy_delete_buffer(map_buf);
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fclose(map_fp);
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map_fp = NULL;
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line_no = save_no;
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BEGIN(INITIAL);
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} else
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yyterminate();
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}
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%%
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#ifdef FLEX_DEBUG
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main()
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{
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while(yylex())
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;
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return 0;
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}
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#endif /* FLEX_DEBUG */
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