FreeBSD-5.3/usr.bin/colldef/scan.l
%x string name charmap defn nchar subs subs2
%{
/*-
* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
* at Electronni Visti IA, Kiev, Ukraine.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
__FBSDID("$FreeBSD: src/usr.bin/colldef/scan.l,v 1.19 2002/08/23 04:18:26 ache Exp $");
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <unistd.h>
#include <string.h>
#include <sysexits.h>
#include "common.h"
#include "y.tab.h"
int line_no = 1, save_no, fromsubs;
u_char buf[BUFSIZE], *ptr;
FILE *map_fp;
YY_BUFFER_STATE main_buf, map_buf;
#ifdef FLEX_DEBUG
YYSTYPE yylval;
#endif /* FLEX_DEBUG */
int yylex(void);
%}
%%
<INITIAL,charmap,nchar,subs,subs2>[ \t]+ ;
<subs2>\" { ptr = buf; BEGIN(string); }
<subs>\< { ptr = buf; fromsubs = 1; BEGIN(name); }
<INITIAL>\< { ptr = buf; fromsubs = 0; BEGIN(name); }
^#.*\n line_no++;
^\n line_no++;
<INITIAL>\\\n line_no++;
<INITIAL,nchar,subs>\\t { yylval.ch = '\t'; return CHAR; }
<INITIAL,nchar,subs>\\n { yylval.ch = '\n'; return CHAR; }
<INITIAL,nchar,subs>\\b { yylval.ch = '\b'; return CHAR; }
<INITIAL,nchar,subs>\\f { yylval.ch = '\f'; return CHAR; }
<INITIAL,nchar,subs>\\v { yylval.ch = '\v'; return CHAR; }
<INITIAL,nchar,subs>\\r { yylval.ch = '\r'; return CHAR; }
<INITIAL,nchar,subs>\\a { yylval.ch = '\a'; return CHAR; }
<subs2>\n {
line_no++;
BEGIN(INITIAL);
return '\n';
}
<INITIAL,nchar>\n {
line_no++;
if (map_fp != NULL) {
ptr = buf;
BEGIN(defn);
}
return '\n';
}
<INITIAL>[;,{}()] return *yytext;
<INITIAL>substitute { BEGIN(subs); return SUBSTITUTE; }
<subs>with { BEGIN(subs2); return WITH; }
<INITIAL>order return ORDER;
<INITIAL>charmap BEGIN(charmap);
<INITIAL>;[ \t]*\.\.\.[ \t]*; return RANGE;
<INITIAL,nchar,subs>\\[0-7]{3} {
u_int v;
sscanf(&yytext[1], "%o", &v);
yylval.ch = (u_char)v;
return CHAR;
}
<INITIAL,nchar,subs>\\x[0-9a-fA-F]{2} {
u_int v;
sscanf(&yytext[2], "%x", &v);
yylval.ch = (u_char)v;
return CHAR;
}
<INITIAL,nchar,subs>\\. { yylval.ch = yytext[1]; return CHAR; }
<INITIAL,nchar,subs>. { yylval.ch = *yytext; return CHAR; }
<defn>^#.*\n line_no++;
<defn>[ \t]+ {
if (ptr == buf)
errx(EX_UNAVAILABLE, "map expected near line %u of %s",
line_no, map_name);
*ptr = '\0';
strcpy(yylval.str, buf);
BEGIN(nchar);
return DEFN;
}
<name>\/\/ {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "name buffer overflow near line %u, character '/'",
line_no);
*ptr++ = '/';
}
<name>\/\> {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "name buffer overflow near line %u, character '>'",
line_no);
*ptr++ = '>';
}
<string>\\\" {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\"'",
line_no);
*ptr++ = '"';
}
<name>\> {
u_int i;
if (ptr == buf)
errx(EX_UNAVAILABLE, "non-empty name expected near line %u",
line_no);
*ptr = '\0';
for (i = 0; i <= UCHAR_MAX; i++) {
if (strcmp(charmap_table[i], buf) == 0)
goto findit;
}
errx(EX_UNAVAILABLE, "name <%s> not 'charmap'-defined near line %u",
buf, line_no);
findit:
yylval.ch = i;
if (fromsubs)
BEGIN(subs);
else
BEGIN(INITIAL);
return CHAR;
}
<string>\" {
*ptr = '\0';
strcpy(yylval.str, buf);
BEGIN(subs2);
return STRING;
}
<name,defn>. {
const char *s = (map_fp != NULL) ? map_name : "input";
if (!isascii(*yytext) || !isprint(*yytext))
errx(EX_UNAVAILABLE, "non-ASCII or non-printable character 0x%02x not allowed in the map/name near line %u of %s",
*yytext, line_no, s);
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "map/name buffer overflow near line %u of %s, character '%c'",
line_no, s, *yytext);
*ptr++ = *yytext;
}
<string>\\t {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\t'",
line_no);
*ptr++ = '\t';
}
<string>\\b {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\b'",
line_no);
*ptr++ = '\b';
}
<string>\\f {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\f'",
line_no);
*ptr++ = '\f';
}
<string>\\v {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\v'",
line_no);
*ptr++ = '\v';
}
<string>\\n {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\n'",
line_no);
*ptr++ = '\n';
}
<string>\\r {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\r'",
line_no);
*ptr++ = '\r';
}
<string>\\a {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '\\a'",
line_no);
*ptr++ = '\a';
}
<name,string,defn>\n {
const char *s = (map_fp != NULL) ? map_name : "input";
errx(EX_UNAVAILABLE, "unterminated map/name/string near line %u of %s", line_no, s);
}
<name,string,nchar><<EOF>> {
const char *s = (map_fp != NULL) ? map_name : "input";
errx(EX_UNAVAILABLE, "premature EOF in the name/string/char near line %u of %s", line_no, s);
}
<string>\\x[0-9a-f]{2} {
u_int v;
sscanf(&yytext[2], "%x", &v);
*ptr++ = (u_char)v;
}
<string>\\[0-7]{3} {
u_int v;
sscanf(&yytext[1], "%o", &v);
*ptr++ = (u_char)v;
}
<string>\\. {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '%c'",
line_no, yytext[1]);
*ptr++ = yytext[1];
}
<string>. {
if(ptr >= buf + sizeof(buf) - 1)
errx(EX_UNAVAILABLE, "string buffer overflow near line %u, character '%c'",
line_no, *yytext);
*ptr++ = *yytext;
}
<charmap>[^ \t\n]+ {
strcat(map_name, "/");
strcat(map_name, yytext);
if((map_fp = fopen(map_name, "r")) == NULL)
err(EX_UNAVAILABLE, "can't open 'charmap' file %s",
map_name);
save_no = line_no;
line_no = 1;
map_buf = yy_new_buffer(map_fp, YY_BUF_SIZE);
main_buf = YY_CURRENT_BUFFER;
yy_switch_to_buffer(map_buf);
ptr = buf;
BEGIN(defn);
}
<charmap>\n {
errx(EX_UNAVAILABLE, "'charmap' file name expected near line %u",
line_no);
}
<charmap><<EOF>> {
errx(EX_UNAVAILABLE, "'charmap' file name expected near line %u",
line_no);
}
<INITIAL,defn><<EOF>> {
if(map_fp != NULL) {
if (ptr != buf)
errx(EX_UNAVAILABLE, "premature EOF in the map near line %u of %s", line_no, map_name);
yy_switch_to_buffer(main_buf);
yy_delete_buffer(map_buf);
fclose(map_fp);
map_fp = NULL;
line_no = save_no;
BEGIN(INITIAL);
} else
yyterminate();
}
%%
#ifdef FLEX_DEBUG
main()
{
while(yylex())
;
return 0;
}
#endif /* FLEX_DEBUG */