Minix1.5/lib/other/termcap.c
/*
* termcap.c V1.1 20/7/87 agc Joypace Ltd
*
* Copyright Joypace Ltd, London, UK, 1987. All rights reserved.
* This file may be freely distributed provided that this notice
* remains attached.
*
* A public domain implementation of the termcap(3) routines.
*
*
*
* Klamer Schutte V1.2 Nov. 1988
*
* - Can match multiple terminal names [tgetent]
* - Removal of **area assignments [tgetstr]
*
* Terrence W. Holm V1.3 May, Sep, Oct. 1988
*
* - Correct when TERM != name and TERMCAP is defined [tgetent]
* - Correct the comparison for the terminal name [tgetent]
* - Correct the value of ^x escapes [tgetstr]
* - Added %r to reverse row/column [tgoto]
* - Fixed end of definition test [tgetnum/flag/str]
*
* Terrence W. Holm V1.4 Jan. 1989
*
* - Incorporated Klamer's V1.2 fixes into V1.3
* - Added %d, (old %d is now %2) [tgoto]
* - Allow '#' comments in definition file [tgetent]
*/
#include <lib.h>
#include <termcap.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
char *capab = (char *)NULL; /* the capability itself */
#if 0
/* The following are not yet used. */
extern short ospeed; /* output speed */
extern char PC; /* padding character */
extern char *BC; /* back cursor movement */
extern char *UP; /* up cursor movement */
#endif
/*
* tgetent - get the termcap entry for terminal name, and put it
* in bp (which must be an array of 1024 chars). Returns 1 if
* termcap entry found, 0 if not found, and -1 if file not found.
*/
int tgetent(bp, name)
char *bp;
char *name;
{
FILE *fp;
char *file;
char *term;
short len = strlen(name);
capab = bp;
/* If TERMCAP begins with a '/' then use TERMCAP as the path */
/* Name of the termcap definitions file. If TERMCAP is a */
/* Definition and TERM equals "name" then use TERMCAP as the */
/* Definition. Otherwise use "/etc/termcap" as the path name. */
if ((file = getenv("TERMCAP")) == (char *)NULL)
file = "/etc/termcap";
else if (*file != '/')
if ((term = getenv("TERM")) != (char *)NULL && strcmp(term, name) == 0) {
*bp = '\0';
strncat(bp, file, 1023);
return(1);
} else
file = "/etc/termcap";
if ((fp = fopen(file, "r")) == (FILE *) NULL) {
capab = (char *)NULL; /* no valid termcap */
return(-1);
}
for (;;) {
/* Read in each definition */
int def_len = 0;
char *cp = bp;
do {
if (fgets(&bp[def_len], (unsigned int)(1024 - def_len), fp) == (char *)NULL) {
fclose(fp);
capab = (char *)NULL; /* no valid termcap */
return(0);
}
def_len = strlen(bp) - 2;
} while (bp[def_len] == '\\');
while (isspace(*cp)) cp++;
/* Comment lines start with a '#' */
if (*cp == '#') continue;
/* See if any of the terminal names in this definition */
/* Match "name". */
do {
if (strncmp(name, cp, len) == 0 &&
(cp[len] == '|' || cp[len] == ':')) {
fclose(fp);
return(1);
}
while ((*cp) && (*cp != '|') && (*cp != ':')) cp++;
} while (*cp++ == '|');
}
}
/*
* tgetnum - get the numeric terminal capability corresponding
* to id. Returns the value, -1 if invalid.
*/
int tgetnum(id)
char *id;
{
register char *cp = capab;
if (cp == (char *)NULL || id == (char *)NULL) return(-1);
for (;;) {
while (*cp++ != ':')
if (cp[-1] == '\0') return(-1);
while (isspace(*cp)) cp++;
if (strncmp(cp, id, 2) == 0 && cp[2] == '#') return(atoi(cp + 3));
}
}
/*
* tgetflag - get the boolean flag corresponding to id. Returns -1
* if invalid, 0 if the flag is not in termcap entry, or 1 if it is
* present.
*/
int tgetflag(id)
char *id;
{
register char *cp = capab;
if (cp == (char *)NULL || id == (char *)NULL) return(-1);
for (;;) {
while (*cp++ != ':')
if (cp[-1] == '\0') return(0);
while (isspace(*cp)) cp++;
if (strncmp(cp, id, 2) == 0) return(1);
}
}
/*
* tgetstr - get the string capability corresponding to id and place
* it in area (advancing area at same time). Expand escape sequences
* etc. Returns the string, or NULL if it can't do it.
*/
char *tgetstr(id, area)
char *id;
char **area;
{
register char *cp = capab;
register char *wsp = *area; /* workspace pointer */
if (cp == (char *)NULL || id == (char *)NULL) return((char *)NULL);
for (;;) {
while (*cp++ != ':')
if (cp[-1] == '\0') return((char *)NULL);
while (isspace(*cp)) cp++;
if (strncmp(cp, id, 2) == 0 && cp[2] == '=') {
for (cp += 3; *cp && *cp != ':'; wsp++, cp++) switch (*cp) {
case '^':
*wsp = *++cp - '@';
break;
case '\\':
switch (*++cp) {
case 'E':
*wsp = '\033';
break;
case 'n':
*wsp = '\n';
break;
case 'r':
*wsp = '\r';
break;
case 't':
*wsp = '\t';
break;
case 'b':
*wsp = '\b';
break;
case 'f':
*wsp = '\f';
break;
case '0':
case '1':
case '2':
case '3':
{
int i;
int t = 0;
for (i = 0; i < 3 &&
isdigit(*cp); ++i, ++cp)
t = t * 8 + *cp - '0';
*wsp = t;
cp--;
break;
}
default:
*wsp = *cp;
}
break;
default: *wsp = *cp;
}
*wsp++ = '\0';
{
char *ret = *area;
*area = wsp;
return(ret);
}
}
} /* end for(;;) */
}
/*
* tgoto - given the cursor motion string cm, make up the string
* for the cursor to go to (destcol, destline), and return the string.
* Returns "OOPS" if something's gone wrong, or the string otherwise.
*/
char *tgoto(cm, destcol, destline)
char *cm;
int destcol;
int destline;
{
PRIVATE char ret[24];
char *rp = ret;
int incr = 0;
int argno = 0;
int numval;
for (; *cm; cm++) {
if (*cm == '%') {
switch (*++cm) {
case 'i': incr = 1; break;
case 'r': argno = 1; break;
case '+':
numval = (argno == 0 ? destline : destcol);
*rp++ = numval + incr + *++cm;
argno = 1 - argno;
break;
case '2':
numval = (argno == 0 ? destline : destcol);
numval = (numval + incr) % 100;
*rp++ = '0' + (numval / 10);
*rp++ = '0' + (numval % 10);
argno = 1 - argno;
break;
case 'd':
numval = (argno == 0 ? destline : destcol);
numval = (numval + incr) % 1000;
if (numval > 99) *rp++ = '0' + (numval / 100);
if (numval > 9) *rp++ = '0' + (numval / 10) % 10;
*rp++ = '0' + (numval % 10);
argno = 1 - argno;
break;
case '%': *rp++ = '%'; break;
default: return("OOPS");
}
} else
*rp++ = *cm;
}
*rp = '\0';
return(ret);
}
/*
* tputs - put the string cp out onto the terminal, using the function
* outc. This should do padding for the terminal, but I can't find a
* terminal that needs padding at the moment...
*/
int tputs(cp, affcnt, outc)
register char *cp;
int affcnt;
_PROTOTYPE( void (*outc), (int ch));
{
if (cp == (char *)NULL) return(1);
/* Do any padding interpretation - left null for MINIX just now */
while (*cp) (*outc) (*cp++);
return(1);
}