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Annotation of researchv10dc/cmd/pascal/pc0/yyput.c, revision 1.1

1.1     ! root        1: /* Copyright (c) 1979 Regents of the University of California */
        !             2: 
        !             3: static char sccsid[] = "@(#)yyput.c 1.2 3/8/81";
        !             4: 
        !             5: #include "whoami.h"
        !             6: #include "0.h"
        !             7: #include "tree.h"
        !             8: #include "yy.h"
        !             9: 
        !            10: /*
        !            11:  * Structure describing queued listing lines during the forward move
        !            12:  * of error recovery.  These lines will be stroed by yyoutline during
        !            13:  * the forward move and flushed by yyoutfl or yyflush when an
        !            14:  * error occurs or a program termination.
        !            15:  */
        !            16: struct B {
        !            17:        int     Bmagic;
        !            18:        int     Bline;
        !            19:        int     Bseekp;
        !            20:        char    *Bfile;
        !            21:        int     Bseqid;
        !            22:        struct  B *Bnext;
        !            23: } *bottled;
        !            24: 
        !            25: /*
        !            26:  * Filename gives the current input file, lastname is
        !            27:  * the last filename we printed, and lastid is the seqid of the last line
        !            28:  * we printed, to help us avoid printing
        !            29:  * multiple copies of lines.
        !            30:  */
        !            31: extern char *filename;
        !            32: char   *lastname;
        !            33: int    lastid;
        !            34: 
        !            35: char   hadsome;
        !            36: char   holdbl;
        !            37: 
        !            38: /*
        !            39:  * Print the current line in the input line
        !            40:  * buffer or, in a forward move of the recovery, queue it for printing.
        !            41:  */
        !            42: yyoutline()
        !            43: {
        !            44:        register struct B *bp;
        !            45: 
        !            46:        if (Recovery) {
        !            47:                bp = (struct B*)tree(6, T_BOTTLE, yyline, yylinpt, filename, yyseqid);
        !            48:                if (bottled != NIL)
        !            49:                        bp->Bnext = bottled->Bnext, bottled->Bnext = bp;
        !            50:                else
        !            51:                        bp->Bnext = bp;
        !            52:                bottled = bp;
        !            53:                return;
        !            54:        }
        !            55:        yyoutfl(yyseqid);
        !            56:        if (yyseqid != lastid)
        !            57:                yyprline(charbuf, yyline, filename, yyseqid);
        !            58: }
        !            59: 
        !            60: /*
        !            61:  * Flush all the bottled output.
        !            62:  */
        !            63: yyflush()
        !            64: {
        !            65: 
        !            66:        yyoutfl(32767);
        !            67: }
        !            68: 
        !            69: /*
        !            70:  * Flush the listing to the sequence id toseqid
        !            71:  */
        !            72: yyoutfl(toseqid)
        !            73:        int toseqid;
        !            74: {
        !            75:        register struct B *bp;
        !            76: 
        !            77:        bp = bottled;
        !            78:        if (bp == NIL)
        !            79:                return;
        !            80:        bp = bp->Bnext;
        !            81:        while (bp->Bseqid <= toseqid) {
        !            82:                yygetline(bp->Bfile, bp->Bseekp, bp->Bline, bp->Bseqid);
        !            83:                if (bp->Bnext == bp) {
        !            84:                        bottled = NIL;
        !            85:                        break;
        !            86:                }
        !            87:                bp = bp->Bnext;
        !            88:                bottled->Bnext = bp;
        !            89:        }
        !            90: }
        !            91: 
        !            92: FILE   *yygetunit = NULL;
        !            93: char   *yygetfile;
        !            94: 
        !            95: /*
        !            96:  * Yysync guarantees that the line associated
        !            97:  * with the current token was the last line
        !            98:  * printed for a syntactic error message.
        !            99:  */
        !           100: yysync()
        !           101: {
        !           102: 
        !           103:        yyoutfl(yyeseqid);
        !           104:        if (lastid != yyeseqid)
        !           105:                yygetline(yyefile, yyseekp, yyeline, yyeseqid);
        !           106: }
        !           107: 
        !           108: yySsync()
        !           109: {
        !           110: 
        !           111:        yyoutfl(OY.Yyeseqid);
        !           112: }
        !           113: 
        !           114: /*
        !           115:  * Yygetline gets a line from a file after we have
        !           116:  * lost it.  The pointer efile gives the name of the file,
        !           117:  * seekp its offset in the file, and eline its line number.
        !           118:  * If this routine has been called before the last file
        !           119:  * it worked on will be open in yygetunit, with the files
        !           120:  * name being given in yygetfile.  Note that this unit must
        !           121:  * be opened independently of the unit in use for normal i/o
        !           122:  * to this file; if it were a dup seeks would seek both files.
        !           123:  */
        !           124: yygetline(efile, seekp, eline, eseqid)
        !           125:        char *efile;
        !           126:        int seekp, eline, eseqid;
        !           127: {
        !           128:        register int cnt;
        !           129:        register char *bp;
        !           130:        char buf[CBUFSIZE + 1];
        !           131: 
        !           132:        if (lastid == eseqid)
        !           133:                return;
        !           134:        if (eseqid == yyseqid) {
        !           135:                bp = charbuf;
        !           136:                yyprtd++;
        !           137:        } else {
        !           138:                bp = buf;
        !           139:                if (efile != yygetfile) {
        !           140:                        if ( yygetunit != NULL )
        !           141:                            fclose( yygetunit );
        !           142:                        yygetfile = efile;
        !           143:                        yygetunit = fopen( yygetfile , "r" );
        !           144:                        if ((int)yygetunit < 0)
        !           145: oops:
        !           146:                                perror(yygetfile), pexit(DIED);
        !           147:                } 
        !           148:                if ( fseek( yygetunit , (long) seekp , 0 ) < 0)
        !           149:                        goto oops;
        !           150:                cnt = fread( bp , sizeof( * bp ) , CBUFSIZE , yygetunit );
        !           151:                if (cnt < 0)
        !           152:                        goto oops;
        !           153:                bp[cnt] = 0;
        !           154:        }
        !           155:        yyprline(bp, eline, efile, eseqid);
        !           156: }
        !           157: 
        !           158: yyretrieve()
        !           159: {
        !           160: 
        !           161:        yygetline(OY.Yyefile, OY.Yyseekp, OY.Yyeline, OY.Yyeseqid);
        !           162: }
        !           163: 
        !           164: /*
        !           165:  * Print the line in the character buffer which has
        !           166:  * line number line.  The buffer may be terminated by a new
        !           167:  * line character or a null character.  We process
        !           168:  * form feed directives, lines with only a form feed character, and
        !           169:  * suppress numbering lines which are empty here.
        !           170:  */
        !           171: yyprline(buf, line, file, id)
        !           172:        register char *buf;
        !           173:        int line;
        !           174:        char *file;
        !           175:        int id;
        !           176: {
        !           177: 
        !           178:        lastid = id;
        !           179:        if (buf[0] == '\f' && buf[1] == '\n') {
        !           180:                printf("\f\n");
        !           181:                hadsome = 0;
        !           182:                holdbl = 0;
        !           183:                return;
        !           184:        }
        !           185:        if (holdbl) {
        !           186:                pchr('\n');
        !           187:                holdbl = 0;
        !           188:        }
        !           189:        if (buf[0] == '\n')
        !           190:                holdbl = 1;
        !           191:        else {
        !           192:                yysetfile(file);
        !           193:                yyprintf(buf, line);
        !           194:        }
        !           195:        hadsome = 1;
        !           196: }
        !           197: 
        !           198: yyprintf(cp, line)
        !           199:        register char *cp;
        !           200:        int line;
        !           201: {
        !           202: 
        !           203:        printf("%6d  ", line);
        !           204:        while (*cp != 0 && *cp != '\n')
        !           205:                pchr(graphic(*cp++));
        !           206:        pchr('\n');
        !           207: }
        !           208: 
        !           209: graphic(ch)
        !           210:        register CHAR ch;
        !           211: {
        !           212: 
        !           213:        switch (ch) {
        !           214:                default:
        !           215:                        if (ch >= ' ')
        !           216:                                return (ch);
        !           217:                case 0177:
        !           218:                        return ('?');
        !           219:                case '\n':
        !           220:                case '\t':
        !           221:                        return (ch);
        !           222:        }
        !           223: }
        !           224: 
        !           225: extern int nopflg;
        !           226: 
        !           227: char   printed = 1;
        !           228: /*
        !           229:  * Set the current file name to be file,
        !           230:  * printing the name, or a header on a new
        !           231:  * page if required.
        !           232:  * there is another yysetfile in error.c
        !           233:  * this one is for PI and PXP that one is for PI1
        !           234:  */
        !           235: yysetfile(file)
        !           236:        register char *file;
        !           237: {
        !           238: 
        !           239: #ifdef PXP
        !           240:        if (nopflg == 1)
        !           241:                return;
        !           242: #endif
        !           243: 
        !           244:        if (lastname == file)
        !           245:                return;
        !           246:        if (file == filename && opt('n') && (printed & 02) == 0) {
        !           247:                printed |= 02;
        !           248:                header();
        !           249:        } else
        !           250:                yyputfn(file);
        !           251:        lastname = file;
        !           252: }
        !           253: 
        !           254: /*
        !           255:  * Put out an include file name
        !           256:  * if an error occurs but the name has
        !           257:  * not been printed (or if another name
        !           258:  * has been printed since it has).
        !           259:  */
        !           260: yyputfn(cp)
        !           261:        register char *cp;
        !           262: {
        !           263:        extern int outcol;
        !           264: 
        !           265:        if (cp == lastname && printed)
        !           266:                return;
        !           267:        lastname = cp;
        !           268:        printed = 1;
        !           269: #ifdef PXP
        !           270:        if (outcol)
        !           271:                pchr('\n');
        !           272: #endif
        !           273:        gettime( cp );
        !           274:        printf("%s  %s:\n" , myctime( &tvec ) , cp );
        !           275:        hadsome = 1;
        !           276: }

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