Return to subr.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / usr.lib / libplot / aed

Annotation of 43BSDTahoe/usr.lib/libplot/aed/subr.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)subr.c     5.2 (Berkeley) 4/30/85";
        !             9: #endif not lint
        !            10: 
        !            11: 
        !            12: #include "aed.h"
        !            13: 
        !            14: /*
        !            15:  * The following table is used to convert numbers to hex.  We cannot use
        !            16:  * standard C library conversion because it generates lower case letters
        !            17:  * which are bad news to the AED512.
        !            18:  */
        !            19: 
        !            20: static char hex[] = "0123456789ABCDEF";
        !            21: 
        !            22: /*---------------------------------------------------------
        !            23:  *     This is a local routine that converts an integer to a string
        !            24:  *     of hexadecimal characters.
        !            25:  *
        !            26:  *     Results:        None.
        !            27:  *
        !            28:  *     Side Effects:
        !            29:  *     The string contains the value of the low-order nchars 4-bit chunks
        !            30:  *     of val, as represented in hexadecimal.  String is zero-filled.
        !            31:  *---------------------------------------------------------
        !            32:  */
        !            33: chex(val, string, nchars)
        !            34: int val;                       /* Integer value to be converted. */
        !            35: char *string;                  /* Pointer to area for converted result. */
        !            36: int nchars;                    /* Number of characters to be converted. */
        !            37: {
        !            38:     string = &(string[nchars]);
        !            39:     *string = '\0';
        !            40:     for (; nchars>0 ; nchars--)
        !            41:     {
        !            42:        *(--string) = hex[val & 017];
        !            43:        val >>= 4;
        !            44:     }
        !            45: }
        !            46: 
        !            47: /*---------------------------------------------------------
        !            48:  *     This local routine outputs an x-y coordinate pair in the standard
        !            49:  *     format required by the AED display.
        !            50:  *
        !            51:  *     Results:        None.
        !            52:  *     
        !            53:  *     Side Effects:
        !            54:  *     Characters are output to the AED512 in the standard way required
        !            55:  *     for values indicated by "xy20" in the user manual.
        !            56:  *
        !            57:  *     Errors:         None.
        !            58:  *---------------------------------------------------------
        !            59:  */
        !            60: outxy20(x, y)
        !            61: int x, y;                      /* The coordinates to be output.  Note:
        !            62:                                 * these are world coordinates, not screen
        !            63:                                 * ones.  We scale in this routine.
        !            64:                                 */
        !            65: {
        !            66:     char s1[4], s2[4], s3[4];
        !            67:     x = ((x - xbot) * scale)>>12;
        !            68:     y = ((y - ybot) * scale)>>12;
        !            69:     chex(((y>>8)&03) | ((x>>6)&014), s1, 1);
        !            70:     chex(x&0377, s2, 2);
        !            71:     chex(y&0377, s3, 2);
        !            72:     fprintf(stdout, "%s%s%s", s1, s2, s3);
        !            73: }
        !            74: 
        !            75: /*---------------------------------------------------------
        !            76:  *     This routine sets the display's current color.
        !            77:  *
        !            78:  *     Results:        None.
        !            79:  *
        !            80:  *     Side Effects:
        !            81:  *     The current color in the display is set to pcolor, if it
        !            82:  *     isn't that already.
        !            83:  *---------------------------------------------------------
        !            84:  */
        !            85: setcolor(pcolor)
        !            86: char *pcolor;                  /* Pointer to a string giving the desired
        !            87:                                 * color in hexadecimal.
        !            88:                                 */
        !            89: {
        !            90:     static char curcolor[] = "xx";
        !            91:     if ((pcolor[0] != curcolor[0]) || (pcolor[1] != curcolor[1]))
        !            92:     {
        !            93:        curcolor[0] = pcolor[0];
        !            94:        curcolor[1] = pcolor[1];
        !            95:        putc('L', stdout);
        !            96:        fputs(curcolor, stdout);
        !            97:     }
        !            98: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.