ttext.c - plan9port - [fork] Plan 9 from user space
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       ttext.c (1032B)
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            1 /*
            2           t string  Place the string so that its first character is
            3                     centered on the current point (default).  If
            4                     string begins with `\C' (`\R'), it is centered
            5                     (right-adjusted) on the current point.  A
            6                     backslash at the beginning of the string may be
            7                     escaped with another backslash.
            8  */
            9 #include "mplot.h"
           10 void text(char *s){
           11         register int        kx, ky;
           12         int centered, right, more;
           13         char *ss;
           14         ss=s;
           15         for(;;){
           16                 centered=right=more=0;
           17                 if(*ss=='\\'){
           18                         ss++;
           19                         switch(*ss){
           20                         case 'C': centered++; ss++; break;
           21                         case 'R': right++; ss++; break;
           22                         case 'L': ss++; break;
           23                         case 'n': --ss; break;
           24                         }
           25                 }
           26                 for(s=ss;*ss!='\0';ss++)
           27                         if(ss[0]=='\\' && ss[1]=='n'){
           28                                 more++;
           29                                 break;
           30                         }
           31                 kx = SCX(e1->copyx);
           32                 ky = SCY(e1->copyy);
           33                 ky=m_text(kx, ky, s, ss, e1->foregr, centered, right);
           34                 if(!more)break;
           35                 e1->copyy = ( (double)(ky) - e1->bottom)/e1->scaley + e1->ymin + .5;
           36                 move(e1->copyx, e1->copyy);
           37                 ss+=2;
           38         }
           39 }