1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
294 lines
8.1 KiB
Plaintext
294 lines
8.1 KiB
Plaintext
%x string name charmap defn nchar subs
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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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* $FreeBSD$
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*/
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#include <ctype.h>
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#include <err.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 "collate.h"
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#include "y.tab.h"
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int line_no = 1, save_no;
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u_char buf[STR_LEN], *ptr;
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FILE *map_fp;
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extern char map_name[];
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extern u_char charmap_table[UCHAR_MAX + 1][STR_LEN];
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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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%}
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%%
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<INITIAL,charmap,nchar,subs>[ \t]+ ;
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<subs>\" { ptr = buf; BEGIN(string); }
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<INITIAL>\< { ptr = buf; 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>\\t { yylval.ch = '\t'; return CHAR; }
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<INITIAL,nchar>\\n { yylval.ch = '\n'; return CHAR; }
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<INITIAL,nchar>\\b { yylval.ch = '\b'; return CHAR; }
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<INITIAL,nchar>\\f { yylval.ch = '\f'; return CHAR; }
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<INITIAL,nchar>\\v { yylval.ch = '\v'; return CHAR; }
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<INITIAL,nchar>\\r { yylval.ch = '\r'; return CHAR; }
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<INITIAL,nchar>\\a { yylval.ch = '\a'; return CHAR; }
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<INITIAL,nchar>\\. { yylval.ch = yytext[1]; return CHAR; }
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<subs>\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 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>\\[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>\\x[0-9a-z]{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>[^;,{}() \t\n"<]+ {
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if(yyleng == 1) {
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yylval.ch = *yytext;
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return CHAR;
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}
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if(yyleng > STR_LEN - 1)
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errx(EX_UNAVAILABLE, "chain buffer overflaw near line %u",
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line_no);
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strcpy(yylval.str, yytext);
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return CHAIN;
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}
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<nchar>. {
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yylval.ch = *yytext;
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return CHAR;
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}
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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 overflaw 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 overflaw 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 overflaw 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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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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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(subs);
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return STRING;
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}
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<name,defn>. {
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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 overflaw 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 overflaw 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 overflaw 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 overflaw 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 overflaw 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 overflaw 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 overflaw 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 overflaw 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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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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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 overflaw 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 overflaw 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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