574 lines
10 KiB
C
Executable file
574 lines
10 KiB
C
Executable file
/*
|
|
* termcap.c 1.1 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.
|
|
*
|
|
* Made fully functional by Ceriel J.H. Jacobs.
|
|
*
|
|
* BUGS:
|
|
* - does not check termcap entry sizes
|
|
* - not fully tested
|
|
*/
|
|
|
|
#define CAPABLEN 2
|
|
|
|
#define ISSPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\r' || (c) == '\n')
|
|
#define ISDIGIT(x) ((x) >= '0' && (x) <= '9')
|
|
|
|
short ospeed = 0; /* output speed */
|
|
char PC = 0; /* padding character */
|
|
char *BC = 0; /* back cursor movement */
|
|
char *UP = 0; /* up cursor movement */
|
|
|
|
static char *capab = 0; /* the capability itself */
|
|
static int check_for_tc();
|
|
static int match_name();
|
|
|
|
#define NULL 0
|
|
|
|
/* Some things from C-library, needed here because the C-library is not
|
|
loaded with Modula-2 programs
|
|
*/
|
|
|
|
static char *
|
|
strcat(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
/* Append s2 to the end of s1. */
|
|
|
|
char *original = s1;
|
|
|
|
/* Find the end of s1. */
|
|
while (*s1 != 0) s1++;
|
|
|
|
/* Now copy s2 to the end of s1. */
|
|
while (*s1++ = *s2++) /* nothing */ ;
|
|
return(original);
|
|
}
|
|
|
|
static char *
|
|
strcpy(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
/* Copy s2 to s1. */
|
|
char *original = s1;
|
|
|
|
while (*s1++ = *s2++) /* nothing */;
|
|
return(original);
|
|
}
|
|
|
|
static int
|
|
strlen(s)
|
|
char *s;
|
|
{
|
|
/* Return length of s. */
|
|
|
|
char *original = s;
|
|
|
|
while (*s != 0) s++;
|
|
return(s - original);
|
|
}
|
|
|
|
static int
|
|
strcmp(s1, s2)
|
|
register char *s1, *s2;
|
|
{
|
|
/* Compare 2 strings. */
|
|
|
|
for(;;) {
|
|
if (*s1 != *s2) {
|
|
if (!*s1) return -1;
|
|
if (!*s2) return 1;
|
|
return(*s1 - *s2);
|
|
}
|
|
if (*s1++ == 0) return(0);
|
|
s2++;
|
|
}
|
|
}
|
|
|
|
static int
|
|
strncmp(s1, s2, n)
|
|
register char *s1, *s2;
|
|
int n;
|
|
{
|
|
/* Compare two strings, but at most n characters. */
|
|
|
|
while (n-- > 0) {
|
|
if (*s1 != *s2) {
|
|
if (!*s1) return -1;
|
|
if (!*s2) return 1;
|
|
return(*s1 - *s2);
|
|
}
|
|
if (*s1++ == 0) break;
|
|
s2++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static char *
|
|
getenv(name)
|
|
register char *name;
|
|
{
|
|
extern char ***_penviron;
|
|
register char **v = *_penviron, *p, *q;
|
|
|
|
if (v == 0 || name == 0) return 0;
|
|
while ((p = *v++) != 0) {
|
|
q = name;
|
|
while (*q && *q++ == *p++) /* nothing */ ;
|
|
if (*q || *p != '=') continue;
|
|
return(p+1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
static char *
|
|
fgets(buf, count, fd)
|
|
char *buf;
|
|
{
|
|
static char bf[1024];
|
|
static int cnt = 0;
|
|
static char *pbf = &bf[0];
|
|
register char *c = buf;
|
|
|
|
|
|
while (--count) {
|
|
if (pbf >= &bf[cnt]) {
|
|
if ((cnt = read(fd, bf, 1024)) <= 0) {
|
|
if (c == buf) return (char *) NULL;
|
|
*c = 0;
|
|
return buf;
|
|
}
|
|
pbf = &bf[0];
|
|
}
|
|
*c = *pbf++;
|
|
if (*c++ == '\n') {
|
|
*c = 0;
|
|
return buf;
|
|
}
|
|
}
|
|
*c = 0;
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
{
|
|
int fp;
|
|
char *file;
|
|
char *cp;
|
|
short len = strlen(name);
|
|
char buf[1024];
|
|
|
|
capab = bp;
|
|
if ((file = getenv("TERMCAP")) != (char *) NULL) {
|
|
if (*file != '/' &&
|
|
(cp = getenv("TERM")) != NULL && strcmp(name, cp) == 0) {
|
|
(void) strcpy(bp, file);
|
|
return(1);
|
|
}
|
|
else file = "/etc/termcap";
|
|
} else
|
|
file = "/etc/termcap";
|
|
if ((fp = open(file, 0)) < 0) {
|
|
capab = 0;
|
|
return(-1);
|
|
}
|
|
while (fgets(buf, 1024, fp) != NULL) {
|
|
if (buf[0] == '#') continue;
|
|
while (*(cp = &buf[strlen(buf) - 2]) == '\\')
|
|
if (fgets(cp, 1024, fp) == NULL)
|
|
return (0);
|
|
if (match_name(buf, name)) {
|
|
strcpy(bp, buf);
|
|
close(fp);
|
|
if(check_for_tc() == 0) {
|
|
capab = 0;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
capab = 0;
|
|
close(fp);
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* Compare the terminal name with each termcap entry name; Return 1 if a
|
|
* match is found.
|
|
*/
|
|
static int
|
|
match_name(buf, name)
|
|
char *buf;
|
|
char *name;
|
|
{
|
|
register char *tp = buf;
|
|
register char *np;
|
|
|
|
for (;;) {
|
|
for (np = name; *np && *tp == *np; np++, tp++) { }
|
|
if (*np == 0 && (*tp == '|' || *tp == ':' || *tp == 0))
|
|
return(1);
|
|
while (*tp != 0 && *tp != '|' && *tp != ':') tp++;
|
|
if (*tp++ != '|') return (0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle tc= definitions recursively.
|
|
*/
|
|
static int
|
|
check_for_tc()
|
|
{
|
|
static int count = 0;
|
|
char *savcapab = capab;
|
|
char buf[1024];
|
|
char terminalname[128];
|
|
register char *p = capab + strlen(capab) - 2, *q;
|
|
|
|
while (*p != ':')
|
|
if (--p < capab)
|
|
return(0); /* no : in termcap entry */
|
|
if (p[1] != 't' || p[2] != 'c')
|
|
return(1);
|
|
if (count > 16) {
|
|
return(0); /* recursion in tc= definitions */
|
|
}
|
|
count++;
|
|
strcpy(terminalname, &p[4]);
|
|
q = terminalname;
|
|
while (*q && *q != ':') q++;
|
|
*q = 0;
|
|
if (tgetent(buf, terminalname) != 1) {
|
|
--count;
|
|
return(0);
|
|
}
|
|
--count;
|
|
for (q = buf; *q && *q != ':'; q++) { }
|
|
strcpy(p, q);
|
|
capab = savcapab;
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* tgetnum - get the numeric terminal capability corresponding
|
|
* to id. Returns the value, -1 if invalid.
|
|
*/
|
|
int
|
|
tgetnum(id)
|
|
char *id;
|
|
{
|
|
char *cp;
|
|
int ret;
|
|
|
|
if ((cp = capab) == NULL || id == NULL || *cp == 0)
|
|
return(-1);
|
|
while (*++cp && *cp != ':')
|
|
;
|
|
while (*cp) {
|
|
cp++;
|
|
while (ISSPACE(*cp))
|
|
cp++;
|
|
if (strncmp(cp, id, CAPABLEN) == 0) {
|
|
while (*cp && *cp != ':' && *cp != '#')
|
|
cp++;
|
|
if (*cp != '#')
|
|
return(-1);
|
|
for (ret = 0, cp++ ; *cp && ISDIGIT(*cp) ; cp++)
|
|
ret = ret * 10 + *cp - '0';
|
|
return(ret);
|
|
}
|
|
while (*cp && *cp != ':')
|
|
cp++;
|
|
}
|
|
return(-1);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
{
|
|
char *cp;
|
|
|
|
if ((cp = capab) == NULL || id == NULL || *cp == 0)
|
|
return(-1);
|
|
while (*++cp && *cp != ':')
|
|
;
|
|
while (*cp) {
|
|
cp++;
|
|
while (ISSPACE(*cp))
|
|
cp++;
|
|
if (strncmp(cp, id, CAPABLEN) == 0)
|
|
return(1);
|
|
while (*cp && *cp != ':')
|
|
cp++;
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
{
|
|
char *cp;
|
|
char *ret;
|
|
int i;
|
|
|
|
if ((cp = capab) == NULL || id == NULL || *cp == 0)
|
|
return(NULL);
|
|
while (*++cp != ':')
|
|
;
|
|
while (*cp) {
|
|
cp++;
|
|
while (ISSPACE(*cp))
|
|
cp++;
|
|
if (strncmp(cp, id, CAPABLEN) == 0) {
|
|
while (*cp && *cp != ':' && *cp != '=')
|
|
cp++;
|
|
if (*cp != '=')
|
|
return(NULL);
|
|
for (ret = *area, cp++; *cp && *cp != ':' ; (*area)++, cp++)
|
|
switch(*cp) {
|
|
case '^' :
|
|
**area = *++cp - 'A' + 1;
|
|
break;
|
|
case '\\' :
|
|
switch(*++cp) {
|
|
case 'E' :
|
|
**area = '\033';
|
|
break;
|
|
case 'n' :
|
|
**area = '\n';
|
|
break;
|
|
case 'r' :
|
|
**area = '\r';
|
|
break;
|
|
case 't' :
|
|
**area = '\t';
|
|
break;
|
|
case 'b' :
|
|
**area = '\b';
|
|
break;
|
|
case 'f' :
|
|
**area = '\f';
|
|
break;
|
|
case '0' :
|
|
case '1' :
|
|
case '2' :
|
|
case '3' :
|
|
for (i=0 ; *cp && ISDIGIT(*cp) ; cp++)
|
|
i = i * 8 + *cp - '0';
|
|
**area = i;
|
|
cp--;
|
|
break;
|
|
case '^' :
|
|
case '\\' :
|
|
**area = *cp;
|
|
break;
|
|
}
|
|
break;
|
|
default :
|
|
**area = *cp;
|
|
}
|
|
*(*area)++ = '\0';
|
|
return(ret);
|
|
}
|
|
while (*cp && *cp != ':')
|
|
cp++;
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
{
|
|
register char *rp;
|
|
static char ret[32];
|
|
char added[16];
|
|
int *dp = &destline;
|
|
int numval;
|
|
int swapped = 0;
|
|
|
|
added[0] = 0;
|
|
for (rp = ret ; *cm ; cm++) {
|
|
if (*cm == '%') {
|
|
switch(*++cm) {
|
|
case '>' :
|
|
if (dp == NULL)
|
|
return("OOPS");
|
|
cm++;
|
|
if (*dp > *cm++) {
|
|
*dp += *cm;
|
|
}
|
|
break;
|
|
case '+' :
|
|
case '.' :
|
|
if (dp == NULL)
|
|
return("OOPS");
|
|
if (*cm == '+') *dp = *dp + *++cm;
|
|
for (;;) {
|
|
switch(*dp) {
|
|
case 0:
|
|
case 04:
|
|
case '\t':
|
|
case '\n':
|
|
/* filter these out */
|
|
if (dp == &destcol || swapped || UP) {
|
|
strcat(added, dp == &destcol || swapped ?
|
|
(BC ? BC : "\b") :
|
|
UP);
|
|
(*dp)++;
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
*rp++ = *dp;
|
|
dp = (dp == &destline) ? &destcol : NULL;
|
|
break;
|
|
|
|
case 'r' : {
|
|
int tmp = destline;
|
|
|
|
destline = destcol;
|
|
destcol = tmp;
|
|
swapped = 1 - swapped;
|
|
break;
|
|
}
|
|
case 'n' :
|
|
destcol ^= 0140;
|
|
destline ^= 0140;
|
|
break;
|
|
|
|
case '%' :
|
|
*rp++ = '%';
|
|
break;
|
|
|
|
case 'i' :
|
|
destcol++;
|
|
destline++;
|
|
break;
|
|
|
|
case 'B' :
|
|
if (dp == NULL)
|
|
return("OOPS");
|
|
*dp = 16 * (*dp / 10) + *dp % 10;
|
|
break;
|
|
|
|
case 'D' :
|
|
if (dp == NULL)
|
|
return("OOPS");
|
|
*dp = *dp - 2 * (*dp % 16);
|
|
break;
|
|
|
|
case 'd' :
|
|
case '2' :
|
|
case '3' :
|
|
if (dp == NULL)
|
|
return("OOPS");
|
|
numval = *dp;
|
|
dp = (dp == &destline) ? &destcol : NULL;
|
|
if (numval >= 100) {
|
|
*rp++ = '0' + numval / 100;
|
|
}
|
|
else if (*cm == '3') {
|
|
*rp++ = ' ';
|
|
}
|
|
if (numval >= 10) {
|
|
*rp++ = '0' + ((numval%100)/10);
|
|
}
|
|
else if (*cm == '3' || *cm == '2') {
|
|
*rp++ = ' ';
|
|
}
|
|
*rp++ = '0' + (numval%10);
|
|
break;
|
|
default :
|
|
return("OOPS");
|
|
}
|
|
}
|
|
else *rp++ = *cm;
|
|
}
|
|
*rp = '\0';
|
|
strcpy(rp, added);
|
|
return(ret);
|
|
}
|
|
|
|
static int tens_of_ms_p_char[] = { /* index as returned by gtty */
|
|
/* assume 10 bits per char */
|
|
0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5, 2
|
|
};
|
|
/*
|
|
* tputs - put the string cp out onto the terminal, using the function
|
|
* outc. Also handle padding.
|
|
*/
|
|
int
|
|
tputs(cp, affcnt, outc)
|
|
register char *cp;
|
|
int affcnt;
|
|
int (*outc)();
|
|
{
|
|
int delay = 0;
|
|
if (cp == NULL)
|
|
return(1);
|
|
while (ISDIGIT(*cp)) {
|
|
delay = delay * 10 + (*cp++ - '0');
|
|
}
|
|
delay *= 10;
|
|
if (*cp == '.') {
|
|
cp++;
|
|
if (ISDIGIT(*cp)) {
|
|
delay += *cp++ - '0';
|
|
}
|
|
while (ISDIGIT(*cp)) cp++;
|
|
}
|
|
if (*cp == '*') {
|
|
delay *= affcnt;
|
|
cp++;
|
|
}
|
|
while (*cp)
|
|
(*outc)(*cp++);
|
|
if (delay != 0 &&
|
|
ospeed > 0 &&
|
|
ospeed < (sizeof tens_of_ms_p_char / sizeof tens_of_ms_p_char[0])) {
|
|
delay = (delay + tens_of_ms_p_char[ospeed] - 1) /
|
|
tens_of_ms_p_char[ospeed];
|
|
while (delay--) (*outc)(PC);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
/*
|
|
* That's all, folks...
|
|
*/
|