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Annotation of 43BSD/contrib/X/Xlib/XStringWidth.c, revision 1.1.1.1

1.1       root        1: #include <X/mit-copyright.h>
                      2: 
                      3: /* $Header: XStringWidth.c,v 10.4 86/02/01 15:40:32 tony Rel $ */
                      4: /* Copyright Massachusetts Institute of Technology 1985 */
                      5: 
                      6: #include "XlibInternal.h"
                      7: int XStringWidth (string, info, charpad, spacepad)
                      8:     register char *string;
                      9:     register FontInfo *info;
                     10:     register int charpad, spacepad;
                     11:     {
                     12:     register int result = 0;
                     13:     if (!*string)  /* zero length string */
                     14:        return (0);
                     15: 
                     16:     if (info->fixedwidth) {
                     17:        int length = strlen (string);
                     18:        result = length * (info->width + charpad) - charpad;
                     19:            /* don't pad last character */
                     20:        if (spacepad) {
                     21:            char *sub = string, *index();
                     22:            while (sub = index (sub, ' ')) {
                     23:                result += spacepad;
                     24:                sub++;
                     25:                }
                     26:            if (string[length-1] == ' ')
                     27:                result -= spacepad;
                     28:                /* don't pad terminating space character */
                     29:            }
                     30:        }
                     31: 
                     32:     else {   /* variable width font */
                     33:        unsigned char c;
                     34:        register short *widths = info->widths - info->firstchar;
                     35:        while (c = *(string++)) {
                     36:            if ((c >= info->firstchar) && (c <= info->lastchar))
                     37:                result += (widths[c] + charpad);
                     38:            if (c == ' ')
                     39:                result += spacepad;
                     40:            }
                     41:        result -= charpad;  /* don't pad last character */
                     42:        if (*(string-1) == ' ')
                     43:            result -= spacepad;
                     44:            /* don't pad terminating space character */
                     45:        }
                     46: 
                     47:     return (result);
                     48:     }

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