+++ /dev/null
-/*
- * 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 **environ;
- register char **v = environ, *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...
- */
public / ack.git / commitdiff