mirror of
https://github.com/matrix-construct/construct
synced 2024-08-25 19:12:08 +02:00
274 lines
7.5 KiB
Plaintext
274 lines
7.5 KiB
Plaintext
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/* src/ircd_lexer.l
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* $Id: ircd_lexer.l 6 2005-09-10 01:02:21Z nenolod $
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*/
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%option case-insensitive
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%option noyywrap
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%option nounput
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%{
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#define WE_ARE_MEMORY_C
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#include "stdinc.h"
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#include "ircd_defs.h"
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#include "common.h"
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#include "config.h"
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#include "s_log.h"
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#include "s_conf.h"
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#include "newconf.h"
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#include "y.tab.h"
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int yylex(void);
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/* here to fixup gcc 3.3 errors */
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int yyget_lineno(void);
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FILE *yyget_in(void);
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FILE *yyget_out(void);
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int yyget_leng(void);
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char *yyget_text(void);
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void yyset_lineno(int line_number);
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void yyset_in(FILE * in_str);
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void yyset_out(FILE * out_str);
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int yyget_debug(void);
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void yyset_debug(int bdebug);
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int yylex_destroy(void);
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#define MAX_INCLUDE_DEPTH 10
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YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
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int include_stack_ptr=0;
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int lineno = 1;
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void ccomment(void);
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void cinclude(void);
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void hashcomment(void);
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int ieof(void);
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int lineno_stack[MAX_INCLUDE_DEPTH];
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char conffile_stack[MAX_INCLUDE_DEPTH][IRCD_BUFSIZE];
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char conffilebuf[IRCD_BUFSIZE+1];
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char *current_file = conffilebuf;
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FILE *inc_fbfile_in[MAX_INCLUDE_DEPTH];
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char linebuf[512];
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#undef YY_INPUT
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#define YY_FATAL_ERROR(msg) conf_yy_fatal_error(msg)
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#define YY_INPUT(buf,result,max_size) \
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if (!(result = conf_fgets(buf, max_size, conf_fbfile_in))) \
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YY_FATAL_ERROR("input in flex scanner failed");
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%}
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ws [ \t]*
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digit [0-9]
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comment #.*
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qstring \"[^\"\n]*[\"\n]
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string [a-zA-Z_\~][a-zA-Z0-9_]*
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include \.include{ws}(\<.*\>|\".*\")
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%%
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{include} { cinclude(); }
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"/*" { ccomment(); }
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\n.* { strcpy(linebuf, yytext+1); lineno++; yyless(1); }
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{ws} ;
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{comment} { hashcomment(); }
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{digit}+ { yylval.number = atoi(yytext); return NUMBER; }
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{qstring} {
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if(yytext[yyleng-2] == '\\')
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{
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yyless(yyleng-1); /* return last quote */
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yymore(); /* append next string */
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}
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else
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{
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strcpy(yylval.string, yytext + 1);
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if(yylval.string[yyleng-2] != '"')
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ilog(L_MAIN, "Unterminated character string");
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else
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{
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int i,j;
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yylval.string[yyleng-2] = '\0'; /* remove close
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* quote
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*/
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for (j=i=0 ;yylval.string[i] != '\0'; i++,j++)
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{
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if (yylval.string[i] != '\\')
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{
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yylval.string[j] = yylval.string[i];
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}
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else
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{
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i++;
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if (yylval.string[i] == '\0') /* XXX
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* should not
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* happen
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*/
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{
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ilog(L_MAIN,
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"Unterminated character string");
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break;
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}
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yylval.string[j] = yylval.string[i];
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}
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}
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yylval.string[j] = '\0';
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return QSTRING;
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}
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}
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}
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loadmodule { return LOADMODULE; }
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{string} {
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strcpy(yylval.string, yytext);
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yylval.string[yyleng] = '\0';
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return STRING;
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}
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\.\. { return TWODOTS; }
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. { return yytext[0]; }
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<<EOF>> { if (ieof()) yyterminate(); }
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%%
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/* C-comment ignoring routine -kre*/
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void ccomment()
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{
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int c;
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/* log(L_NOTICE, "got comment"); */
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while (1)
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{
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while ((c = input()) != '*' && c != EOF)
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if (c == '\n') ++lineno;
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if (c == '*')
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{
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while ((c = input()) == '*');
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if (c == '/')
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break;
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}
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if (c == EOF)
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{
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YY_FATAL_ERROR("EOF in comment");
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/* XXX hack alert this disables
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* the stupid unused function warning
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* gcc generates
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*/
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yy_fatal_error("EOF in comment");
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break;
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}
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}
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}
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void cinclude(void)
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{
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char *c;
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if ((c = strchr(yytext, '<')) == NULL)
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*strchr(c = strchr(yytext, '"') + 1, '"') = 0;
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else
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*strchr(++c, '>') = 0;
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/* do stacking and co. */
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if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
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conf_report_error("Includes nested too deep (max is %d)", MAX_INCLUDE_DEPTH);
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else
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{
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FILE *tmp_fbfile_in;
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tmp_fbfile_in = fopen(c, "r");
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if (tmp_fbfile_in == NULL)
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{
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/* if its not found in PREFIX, look in ETCPATH */
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char fnamebuf[IRCD_BUFSIZE];
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snprintf(fnamebuf, sizeof(fnamebuf), "%s/%s", ETCPATH, c);
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tmp_fbfile_in = fopen(fnamebuf, "r");
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/* wasnt found there either.. error. */
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if(tmp_fbfile_in == NULL)
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{
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conf_report_error("Include %s: %s.", c, strerror(errno));
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return;
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}
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}
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lineno_stack[include_stack_ptr] = lineno;
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lineno = 1;
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inc_fbfile_in[include_stack_ptr] = conf_fbfile_in;
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strcpy(conffile_stack[include_stack_ptr], c);
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current_file = conffile_stack[include_stack_ptr];
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include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
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conf_fbfile_in = tmp_fbfile_in;
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yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
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}
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}
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int ieof(void)
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{
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if (include_stack_ptr)
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fclose(conf_fbfile_in);
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if (--include_stack_ptr < 0)
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{
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/* We will now exit the lexer - restore init values if we get /rehash
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* later and reenter lexer -kre */
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include_stack_ptr = 0;
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lineno = 1;
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return 1;
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}
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/* switch buffer */
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yy_delete_buffer(YY_CURRENT_BUFFER);
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lineno = lineno_stack[include_stack_ptr];
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conf_fbfile_in = inc_fbfile_in[include_stack_ptr];
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if(include_stack_ptr)
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current_file = conffile_stack[include_stack_ptr];
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else
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current_file = conffilebuf;
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yy_switch_to_buffer(include_stack[include_stack_ptr]);
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return 0;
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}
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/* #-comment style, look for #include */
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#define INCLUDE "#include"
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void hashcomment(void)
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{
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if (strlen(yytext) < sizeof(INCLUDE) - 1)
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return;
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if (!strncasecmp(yytext, INCLUDE, sizeof(INCLUDE) - 1))
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yyerror("You probably meant '.include', skipping");
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}
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