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Annotation of researchv10no/cmd/postscript/misc/macfont.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *
        !             3:  * Program that converts Macintosh font files to a format that works on Unix
        !             4:  * systems. Essentially all the information needed came from the Adobe paper
        !             5:  * "Supporting Downloadable PostScript Fonts". To use the program type,
        !             6:  *
        !             7:  *     macfont font.mac >font.unix
        !             8:  *
        !             9:  * where font.mac is the font file, exactly as it came over from a Macintosh,
        !            10:  * and font.unix is equivalent host resident font file usable on Unix systems.
        !            11:  * 
        !            12:  */
        !            13: 
        !            14: #include <stdio.h>
        !            15: #include <signal.h>
        !            16: 
        !            17: #define OFF            0
        !            18: #define ON             1
        !            19: 
        !            20: #define NON_FATAL      0
        !            21: #define FATAL          1
        !            22: 
        !            23: #define FALSE          0
        !            24: #define TRUE           1
        !            25: 
        !            26: char   **argv;
        !            27: int    argc;
        !            28: 
        !            29: char   *prog_name;
        !            30: 
        !            31: int    x_stat;
        !            32: int    debug = OFF;
        !            33: int    ignore = OFF;
        !            34: 
        !            35: FILE   *fp_in = stdin;
        !            36: FILE   *fp_out = stdout;
        !            37: 
        !            38: /*****************************************************************************/
        !            39: 
        !            40: main(agc, agv)
        !            41: 
        !            42:     int                agc;
        !            43:     char       *agv[];
        !            44: 
        !            45: {
        !            46: 
        !            47: /*
        !            48:  *
        !            49:  * Macintosh to Unix font converter.
        !            50:  *
        !            51:  */
        !            52: 
        !            53:     argc = agc;
        !            54:     argv = agv;
        !            55:     prog_name = argv[0];
        !            56: 
        !            57:     options();
        !            58:     arguments();
        !            59:     exit(x_stat);
        !            60: 
        !            61: }   /* End of main */
        !            62: 
        !            63: /*****************************************************************************/
        !            64: 
        !            65: options()
        !            66: 
        !            67: {
        !            68: 
        !            69:     int                ch;
        !            70:     char       *names = "DI";
        !            71: 
        !            72:     extern char        *optarg;
        !            73:     extern int optind;
        !            74: 
        !            75: /*
        !            76:  *
        !            77:  * Command line options.
        !            78:  *
        !            79:  */
        !            80: 
        !            81:     while ( (ch = getopt(argc, argv, names)) != EOF ) {
        !            82:        switch ( ch ) {
        !            83:            case 'D':                   /* debug flag */
        !            84:                    debug = ON;
        !            85:                    break;
        !            86: 
        !            87:            case 'I':                   /* ignore FATAL errors */
        !            88:                    ignore = ON;
        !            89:                    break;
        !            90: 
        !            91:            case '?':                   /* don't understand the option */
        !            92:                    error(FATAL, "");
        !            93:                    break;
        !            94: 
        !            95:            default:                    /* don't know what to do for ch */
        !            96:                    error(FATAL, "missing case for option %c\n", ch);
        !            97:                    break;
        !            98:        }   /* End switch */
        !            99:     }   /* End while */
        !           100: 
        !           101:     argc -= optind;
        !           102:     argv += optind;
        !           103: 
        !           104: }   /* End of options */
        !           105: 
        !           106: /*****************************************************************************/
        !           107: 
        !           108: arguments()
        !           109: 
        !           110: {
        !           111: 
        !           112: 
        !           113: /*
        !           114:  *
        !           115:  * Everything else is an input file. No arguments or '-' means stdin.
        !           116:  *
        !           117:  */
        !           118: 
        !           119:     if ( argc < 1 )
        !           120:        conv();
        !           121:     else
        !           122:        while ( argc > 0 ) {
        !           123:            if ( strcmp(*argv, "-") == 0 )
        !           124:                fp_in = stdin;
        !           125:            else if ( (fp_in = fopen(*argv, "r")) == NULL )
        !           126:                error(FATAL, "can't open %s", *argv);
        !           127:            conv();
        !           128:            if ( fp_in != stdin )
        !           129:                fclose(fp_in);
        !           130:            argc--;
        !           131:            argv++;
        !           132:        }   /* End while */
        !           133: 
        !           134: }   /* End of arguments */
        !           135: 
        !           136: /*****************************************************************************/
        !           137: 
        !           138: conv()
        !           139: 
        !           140: {
        !           141: 
        !           142:     int                blocksize;
        !           143:     int                blocktype;
        !           144: 
        !           145: /*
        !           146:  *
        !           147:  * The first four bytes (in a block) are the block size, the fifth is the block
        !           148:  * type, and the sixth always appears to be NULL. Type 0 blocks are comments and
        !           149:  * are always skipped. Type 1 blocks are ASCII text, type 2 is binary data that
        !           150:  * should be converted to hex, while type 5 blocks represent the end of the font
        !           151:  * file. Commment block lengths appear to be from the first byte, while other
        !           152:  * lengths seem to be measured from block type byte (ie. the fifth byte). Type
        !           153:  * four blocks aren't used, while type 3 blocks mean an end of file indication
        !           154:  * should be sent to the printer. Haven't done anything with type 3 blocks.
        !           155:  *
        !           156:  */
        !           157: 
        !           158:     while ( 1 ) {
        !           159:        blocksize = getint(fp_in);
        !           160:        blocktype = getc(fp_in);
        !           161:        getc(fp_in);
        !           162:        if ( debug == ON )
        !           163:            fprintf(stderr, "blocktype = %d, blocksize = %d\n", blocktype, blocksize);
        !           164:        switch ( blocktype ) {
        !           165:            case 0:                     /* comment - skip blockcount bytes */
        !           166:                fseek(fp_in, (long) blocksize - 6, 1);
        !           167:                break;
        !           168: 
        !           169:            case 1:
        !           170:                asciitext(blocksize - 2);
        !           171:                break;
        !           172: 
        !           173:            case 2:
        !           174:                hexdata(blocksize - 2);
        !           175:                break;
        !           176: 
        !           177:            case 3:
        !           178:            case 4:
        !           179:                error(FATAL, "resource type %d not implemented", blocktype);
        !           180:                break;
        !           181: 
        !           182:            case 5:
        !           183:                return;
        !           184: 
        !           185:            default:
        !           186:                error(FATAL, "unknown resource type %d", blocktype);
        !           187:        }   /* End switch */
        !           188:     }  /* End while */
        !           189: 
        !           190: }   /* End of conv */
        !           191: 
        !           192: /*****************************************************************************/
        !           193: 
        !           194: asciitext(count)
        !           195: 
        !           196:     int                count;                  /* bytes left in the block */
        !           197: 
        !           198: {
        !           199: 
        !           200:     int                ch;
        !           201:     int                i = 0;
        !           202: 
        !           203: /*
        !           204:  *
        !           205:  * Handles type 1 (ie. ASCII text) blocks. Changing carriage returns to newlines
        !           206:  * is all I've done.
        !           207:  *
        !           208:  */
        !           209: 
        !           210:     for ( i = 0; i < count; i++ ) {
        !           211:        if ( (ch = getc(fp_in)) == '\r' )
        !           212:            ch = '\n';
        !           213:        putc(ch, fp_out);
        !           214:     }  /* End for */
        !           215:        
        !           216: }   /* End of asciitext */
        !           217: 
        !           218: /*****************************************************************************/
        !           219: 
        !           220: hexdata(count)
        !           221: 
        !           222:     int                count;                  /* bytes left in the block */
        !           223: 
        !           224: {
        !           225: 
        !           226:     int                i;
        !           227:     int                n;
        !           228: 
        !           229: /*
        !           230:  *
        !           231:  * Reads the next count bytes and converts each byte to hex. Also starts a new
        !           232:  * line every 80 hex characters.
        !           233:  *
        !           234:  */
        !           235: 
        !           236:     for ( i = 0, n = 0; i < count; i++ ) {
        !           237:        fprintf(fp_out, "%.2X", getc(fp_in));
        !           238:        if ( (++n % 40) == 0 )
        !           239:            putc('\n', fp_out);
        !           240:     }  /* End for */
        !           241:        
        !           242: }   /* End of hexdata */
        !           243: 
        !           244: /*****************************************************************************/
        !           245: 
        !           246: getint()
        !           247: 
        !           248: {
        !           249: 
        !           250:     int                val;
        !           251:     int                i;
        !           252: 
        !           253: /*
        !           254:  *
        !           255:  * Reads the next four bytes into an integer and returns the value to the caller.
        !           256:  * First two bytes are probably always 0.
        !           257:  *
        !           258:  */
        !           259: 
        !           260:     for ( i = 0, val = (getc(fp_in) & 0377); i < 3; i++ )
        !           261:        val = (val << 8) | (getc(fp_in) & 0377);
        !           262: 
        !           263:     return(val);
        !           264: 
        !           265: }   /* End of getint */ 
        !           266: 
        !           267: /*****************************************************************************/
        !           268: 
        !           269: error(kind, mesg, a1, a2, a3)
        !           270: 
        !           271: 
        !           272:     int                kind;
        !           273:     char       *mesg;
        !           274:     unsigned   a1, a2, a3;
        !           275: 
        !           276: {
        !           277: 
        !           278: /*
        !           279:  *
        !           280:  * Print *mesg then quit if kind is FATAL.
        !           281:  *
        !           282:  */
        !           283: 
        !           284:     if ( mesg != NULL && *mesg != '\0' ) {
        !           285:        fprintf(stderr, "%s: ", prog_name);
        !           286:        fprintf(stderr, mesg, a1, a2, a3);
        !           287:        putc('\n', stderr);
        !           288:     }  /* End if */
        !           289: 
        !           290:     if ( kind == FATAL && ignore == OFF )
        !           291:        exit(x_stat | 01);
        !           292: 
        !           293: }   /* End of error */
        !           294: 
        !           295: /*****************************************************************************/
        !           296: 

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