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1 /*
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2 * The routines in this file provide support for ANSI style terminals
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3 * over a serial line. The serial I/O services are provided by routines in
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4 * "termio.c". It compiles into nothing if not an ANSI device.
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5 */
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6
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7 #include <stdio.h>
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8 #include "ueed.h"
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9
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10 #ifdef ANSI
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11
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12 #define NROW 23 /* Screen size. */
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13 #define NCOL 77 /* Edit if you want to. */
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14 #define BEL 0x07 /* BEL character. */
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15 #define ESC 0x1B /* ESC character. */
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16
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17 extern int ttopen(); /* Forward references. */
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18 extern int ttgetc();
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19 extern int ttputc();
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20 extern int ttflush();
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21 extern int ttclose();
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22 extern int ansimove();
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23 extern int ansieeol();
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24 extern int ansieeop();
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25 extern int ansibeep();
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26 extern int ansiopen();
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27
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28 /*
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29 * Standard terminal interface dispatch table. Most of the fields point into
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30 * "termio" code.
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31 */
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32 TERM term = {
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33 NROW-1,
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34 NCOL,
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35 ansiopen,
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36 ttclose,
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37 ttgetc,
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38 ttputc,
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39 ttflush,
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40 ansimove,
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41 ansieeol,
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42 ansieeop,
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43 ansibeep
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44 };
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45
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46 ansimove(row, col)
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47 {
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48 ttputc(ESC);
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49 ttputc('[');
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50 ansiparm(row+1);
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51 ttputc(';');
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52 ansiparm(col+1);
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53 ttputc('H');
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54 }
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55
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56 ansieeol()
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57 {
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58 ttputc(ESC);
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59 ttputc('[');
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60 ttputc('K');
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61 }
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62
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63 ansieeop()
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64 {
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65 ttputc(ESC);
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66 ttputc('[');
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67 ttputc('J');
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68 }
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69
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70 ansibeep()
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71 {
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72 ttputc(BEL);
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73 ttflush();
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74 }
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75
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76 ansiparm(n)
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77 register int n;
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78 {
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79 register int q;
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80
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81 q = n/10;
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82 if (q != 0)
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83 ansiparm(q);
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84 ttputc((n%10) + '0');
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85 }
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86
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87 #endif
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88
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89 ansiopen()
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90 {
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91 #ifdef V7
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92 register char *cp;
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93 char *getenv();
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94
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95 if ((cp = getenv("TERM")) == NULL) {
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96 puts("Shell variable TERM not defined!");
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97 exit(1);
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98 }
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99 if (strcmp(cp, "vt100") != 0) {
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100 puts("Terminal type not 'vt100'!");
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101 exit(1);
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102 }
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103 #endif
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104 ttopen();
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105 }
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106
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