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Diff for /src/usr.bin/mg/ttyio.c between version 1.3 and 1.4

version 1.3, 2000/02/25 19:13:21 version 1.4, 2000/02/26 22:53:16
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 /*  /*
  * Name:        MicroEMACS   * Name:        MicroEMACS
  *              System V terminal I/O.   *              POSIX terminal I/O.
  * Version:     0   * Version:     0
  * Last edit:   Tue Aug 26 23:57:57 PDT 1986   * Last edit:   Tue Aug 26 23:57:57 PDT 1986
  * By:          gonzo!daveb   * By:          gonzo!daveb
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  * keyboard characters, and write characters to   * keyboard characters, and write characters to
  * the display in a barely buffered fashion.   * the display in a barely buffered fashion.
  *   *
  * This version goes along with tty/termcap/tty.c.   * This version goes along with the terminfo tty.c.
  * Terminal size is determined there, rather than here, and  
  * this does not open the termcap file  
  */   */
 #include        "def.h"  #include        "def.h"
   
 #include        <sys/types.h>  #include        <sys/types.h>
 #include        <fcntl.h>  #include        <fcntl.h>
 #include        <termios.h>  #include        <termios.h>
   #include        <term.h>
   
 #define NOBUF   512                     /* Output buffer size.          */  #define NOBUF   512                     /* Output buffer size.          */
   
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         if (tcsetattr(0, TCSAFLUSH, &nt) < 0)          if (tcsetattr(0, TCSAFLUSH, &nt) < 0)
                 abort();                  abort();
   
         /* This really belongs in tty/termcap... */          setttysize();
   
         if ((cp=getenv("TERMCAP")) == NULL  
         || (nrow=getvalue(cp, "li")) <= 0  
         || (ncol=getvalue(cp, "co")) <= 0) {  
                 nrow = 24;  
                 ncol = 80;  
         }  
         if (nrow > NROW)                        /* Don't crash if the   */  
                 nrow = NROW;                    /* termcap entry is     */  
         if (ncol > NCOL)                        /* too big.             */  
                 ncol = NCOL;  
   
         ttyactivep = TRUE;          ttyactivep = TRUE;
 }  }
   
 /*  /*
  * This routine scans a string, which is  
  * actually the return value of a getenv call for the TERMCAP  
  * variable, looking for numeric parameter "name". Return the value  
  * if found. Return -1 if not there. Assume that "name" is 2  
  * characters long. This limited use of the TERMCAP lets us find  
  * out the size of a window on the X display.  
  */  
 getvalue(cp, name)  
 register char   *cp;  
 register char   *name;  
 {  
         for (;;) {  
                 while (*cp!=0 && *cp!=':')  
                         ++cp;  
                 if (*cp++ == 0)                 /* Not found.           */  
                         return (-1);  
                 if (cp[0]==name[0] && cp[1]==name[1] && cp[2]=='#')  
                         return (atoi(cp+3));    /* Stops on ":".        */  
         }  
 }  
   
 /*  
  * This function gets called just   * This function gets called just
  * before we go back home to the shell. Put all of   * before we go back home to the shell. Put all of
  * the terminal parameters back.   * the terminal parameters back.
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                 ncol = winsize . ws_col;                  ncol = winsize . ws_col;
         } else          } else
 #endif  #endif
         if ((nrow=tgetnum ("li")) <= 0          if ((nrow = lines) <= 0 || (ncol = columns) <= 0) {
         || (ncol=tgetnum ("co")) <= 0) {  
                 nrow = 24;                  nrow = 24;
                 ncol = 80;                  ncol = 80;
         }          }
         if (nrow > NROW)                        /* Don't crash if the   */  
                 nrow = NROW;                    /* termcap entry is     */          /* Enforce maximum screen size. */
         if (ncol > NCOL)                        /* too big.             */          if (nrow > NROW)
                   nrow = NROW;
           if (ncol > NCOL)
                 ncol = NCOL;                  ncol = NCOL;
 }  }
   
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  Added in v.1.4