Subversion Repositories planix.SVN

# include "ldefs.h"

extern int nine;

void
phead1(void)
{
        Bprint(&fout,"typedef unsigned char Uchar;\n");
        if (nine) {
                Bprint(&fout,"# include <u.h>\n");
                Bprint(&fout,"# include <libc.h>\n");
        }
        Bprint(&fout,"# include <stdio.h>\n");
        Bprint(&fout, "# define U(x) x\n");
        Bprint(&fout, "# define NLSTATE yyprevious=YYNEWLINE\n");
        Bprint(&fout,"# define BEGIN yybgin = yysvec + 1 +\n");
        Bprint(&fout,"# define INITIAL 0\n");
        Bprint(&fout,"# define YYLERR yysvec\n");
        Bprint(&fout,"# define YYSTATE (yyestate-yysvec-1)\n");
        Bprint(&fout,"# define YYOPTIM 1\n");
# ifdef DEBUG
        Bprint(&fout,"# define LEXDEBUG 1\n");
# endif
        Bprint(&fout,"# define YYLMAX 200\n");
        Bprint(&fout,
"# define unput(c) {yytchar= (c);if(yytchar=='\\n')yylineno--;*yysptr++=yytchar;}\n");
        Bprint(&fout,"# define yymore() (yymorfg=1)\n");
        Bprint(&fout,"# define ECHO fprintf(yyout, \"%%s\",yytext)\n");
        Bprint(&fout,"# define REJECT { nstr = yyreject(); goto yyfussy;}\n");
        Bprint(&fout,"int yyleng; extern char yytext[];\n");
        Bprint(&fout,"int yymorfg;\n");
        Bprint(&fout,"extern Uchar *yysptr, yysbuf[];\n");
        Bprint(&fout,"int yytchar;\n");
        Bprint(&fout,"FILE *yyin = {stdin}, *yyout = {stdout};\n");
        Bprint(&fout,"extern int yylineno;\n");
        Bprint(&fout,"struct yysvf { \n");
        Bprint(&fout,"\tstruct yywork *yystoff;\n");
        Bprint(&fout,"\tstruct yysvf *yyother;\n");
        Bprint(&fout,"\tint *yystops;};\n");
        Bprint(&fout,"struct yysvf *yyestate;\n");
        Bprint(&fout,"extern struct yysvf yysvec[], *yybgin;\n");
        Bprint(&fout,"int yylook(void), yywrap(void), yyback(int *, int);\n");
        if(nine) {
                Bprint(&fout,
                                "int infd, outfd;\n"
                                "\n"
                                "void\n"
                                "output(char c)\n"
                                "{\n"
                                "       int rv;\n"
                                "       if ((rv = write(outfd, &c, 1)) < 0)\n"
                                "               sysfatal(\"output: %%r\");\n"
                                "       if (rv == 0)\n"
                                "               sysfatal(\"output: EOF?\");\n"
                                "}\n"
                                "\n"
                                "int\n"
                                "input(void)\n"
                                "{\n"
                                "       if(yysptr > yysbuf)\n"
                                "               yytchar = U(*--yysptr);\n"
                                "       else {\n"
                                "               int rv;\n"
                                "               if ((rv = read(infd, &yytchar, 1)) < 0)\n"
                                "                       sysfatal(\"input: %%r\");\n"
                                "               if (rv == 0)\n"
                                "                       return 0;\n"
                                "       }\n"
                                "       if (yytchar == '\\n')\n"
                                "               yylineno++;\n"
                                "       return yytchar;\n"
                                "}\n");
        }
        else {
                Bprint(&fout,"# define output(c) putc(c,yyout)\n");
                Bprint(&fout, "%s%d%s\n",
                 "# define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==",
                '\n',
                "?(yylineno++,yytchar):yytchar)==EOF?0:yytchar)");
        }
}

void
phead2(void)
{
        Bprint(&fout,"while((nstr = yylook()) >= 0)\n");
        Bprint(&fout,"yyfussy: switch(nstr){\n");
        Bprint(&fout,"case 0:\n");
        Bprint(&fout,"if(yywrap()) return(0); break;\n");
}

void
ptail(void)
{
        if(!pflag){
                Bprint(&fout,"case -1:\nbreak;\n");             /* for reject */
                Bprint(&fout,"default:\n");
                Bprint(&fout,"fprintf(yyout,\"bad switch yylook %%d\",nstr);\n");
                Bprint(&fout,"} return(0); }\n");
                Bprint(&fout,"/* end of yylex */\n");
        }
        pflag = 1;
}

void
statistics(void)
{
        fprint(errorf,"%d/%d nodes(%%e), %d/%d positions(%%p), %d/%d (%%n), %ld transitions\n",
                tptr, treesize, (int)(nxtpos-positions), maxpos, stnum+1, nstates, rcount);
        fprint(errorf, ", %d/%d packed char classes(%%k)", (int)(pcptr-pchar), pchlen);
        fprint(errorf,", %d/%d packed transitions(%%a)",nptr, ntrans);
        fprint(errorf, ", %d/%d output slots(%%o)", yytop, outsize);
        fprint(errorf,"\n");
}