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+/*
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+ * termcap.c 1.1 20/7/87 agc Joypace Ltd
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+ *
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+ * Copyright Joypace Ltd, London, UK, 1987. All rights reserved.
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+ * This file may be freely distributed provided that this notice
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+ * remains attached.
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+ *
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+ * A public domain implementation of the termcap(3) routines.
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+ *
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+ * Made fully functional by Ceriel J.H. Jacobs.
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+ *
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+ * BUGS:
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+ * - does not check termcap entry sizes
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+ * - not fully tested
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+ */
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+
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+#define CAPABLEN 2
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+
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+#define ISSPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\r' || (c) == '\n')
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+#define ISDIGIT(x) ((x) >= '0' && (x) <= '9')
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+
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+short ospeed; /* output speed */
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+char PC; /* padding character */
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+char *BC; /* back cursor movement */
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+char *UP; /* up cursor movement */
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+
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+static char *capab; /* the capability itself */
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+static int check_for_tc();
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+static int match_name();
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+
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+#define NULL 0
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+
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+/* Some things from C-library, needed here because the C-library is not
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+ loaded with Modula-2 programs
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+*/
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+
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+static char *
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+strcat(s1, s2)
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+register char *s1, *s2;
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+{
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+ /* Append s2 to the end of s1. */
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+
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+ char *original = s1;
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+
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+ /* Find the end of s1. */
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+ while (*s1 != 0) s1++;
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+
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+ /* Now copy s2 to the end of s1. */
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+ while (*s1++ = *s2++) /* nothing */ ;
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+ return(original);
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+}
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+
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+static char *
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+strcpy(s1, s2)
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+register char *s1, *s2;
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+{
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+/* Copy s2 to s1. */
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+ char *original = s1;
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+
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+ while (*s1++ = *s2++) /* nothing */;
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+ return(original);
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+}
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+
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+static int
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+strlen(s)
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+char *s;
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+{
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+/* Return length of s. */
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+
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+ char *original = s;
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+
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+ while (*s != 0) s++;
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+ return(s - original);
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+}
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+
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+static int
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+strcmp(s1, s2)
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+register char *s1, *s2;
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+{
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+/* Compare 2 strings. */
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+
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+ for(;;) {
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+ if (*s1 != *s2) {
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+ if (!*s1) return -1;
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+ if (!*s2) return 1;
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+ return(*s1 - *s2);
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+ }
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+ if (*s1++ == 0) return(0);
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+ s2++;
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+ }
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+}
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+
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+static int
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+strncmp(s1, s2, n)
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+ register char *s1, *s2;
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+ int n;
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+{
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+/* Compare two strings, but at most n characters. */
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+
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+ while (n-- > 0) {
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+ if (*s1 != *s2) {
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+ if (!*s1) return -1;
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+ if (!*s2) return 1;
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+ return(*s1 - *s2);
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+ }
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+ if (*s1++ == 0) break;
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+ s2++;
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+ }
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+ return 0;
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+}
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+
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+static char *
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+getenv(name)
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+register char *name;
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+{
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+ extern char **environ;
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+ register char **v = environ, *p, *q;
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+
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+ if (v == 0 || name == 0) return 0;
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+ while ((p = *v++) != 0) {
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+ q = name;
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+ while (*q && *q++ == *p++) /* nothing */ ;
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+ if (*q || *p != '=') continue;
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+ return(p+1);
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+ }
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+ return(0);
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+}
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+
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+static char *
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+fgets(buf, count, fd)
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+ char *buf;
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+{
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+ static char bf[1024];
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+ static int cnt = 0;
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+ static char *pbf = &bf[0];
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+ register char *c = buf;
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+
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+
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+ while (--count) {
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+ if (pbf >= &bf[cnt]) {
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+ if ((cnt = read(fd, bf, 1024)) <= 0) {
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+ if (c == buf) return (char *) NULL;
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+ *c = 0;
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+ return buf;
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+ }
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+ pbf = &bf[0];
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+ }
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+ *c = *pbf++;
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+ if (*c++ == '\n') {
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+ *--c = 0;
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+ return buf;
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+ }
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+ }
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+ *c = 0;
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+ return buf;
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+}
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+
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+/*
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+ * tgetent - get the termcap entry for terminal name, and put it
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+ * in bp (which must be an array of 1024 chars). Returns 1 if
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+ * termcap entry found, 0 if not found, and -1 if file not found.
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+ */
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+int
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+tgetent(bp, name)
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+char *bp;
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+char *name;
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+{
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+ int fp;
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+ char *file;
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+ char *cp;
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+ short len = strlen(name);
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+ char buf[1024];
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+
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+ capab = bp;
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+ if ((file = getenv("TERMCAP")) != (char *) NULL) {
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+ if (*file != '/' &&
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+ (cp = getenv("TERM")) != NULL && strcmp(name, cp) == 0) {
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+ (void) strcpy(bp, file);
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+ return(1);
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+ }
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+ else file = "/etc/termcap";
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+ } else
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+ file = "/etc/termcap";
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+ if ((fp = open(file, 0)) < 0)
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+ return(-1);
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+ while (fgets(buf, 1024, fp) != NULL) {
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+ if (buf[0] == '#') continue;
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+ while (*(cp = &buf[strlen(buf) - 2]) == '\\')
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+ if (fgets(cp, 1024, fp) == NULL)
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+ return (0);
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+ if (match_name(buf, name)) {
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+ strcpy(bp, buf);
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+ close(fp);
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+ return(check_for_tc());
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+ }
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+ }
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+ close(fp);
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+ return(0);
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+}
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+
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+/*
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+ * Compare the terminal name with each termcap entry name; Return 1 if a
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+ * match is found.
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+ */
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+static int
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+match_name(buf, name)
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+ char *buf;
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+ char *name;
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+{
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+ register char *tp = buf;
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+ register char *np;
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+
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+ for (;;) {
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+ for (np = name; *np && *tp == *np; np++, tp++) { }
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+ if (*np == 0 && (*tp == '|' || *tp == ':' || *tp == 0))
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+ return(1);
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+ while (*tp != 0 && *tp != '|' && *tp != ':') tp++;
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+ if (*tp++ != '|') return (0);
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+ }
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+}
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+
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+/*
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+ * Handle tc= definitions recursively.
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+ */
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+static int
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+check_for_tc()
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+{
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+ static int count = 0;
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+ char *savcapab = capab;
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+ char buf[1024];
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+ char terminalname[128];
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+ register char *p = capab + strlen(capab) - 2, *q;
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+
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+ while (*p != ':')
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+ if (--p < capab)
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+ return(0); /* no : in termcap entry */
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+ if (p[1] != 't' || p[2] != 'c')
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+ return(1);
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+ if (count > 16) return(0); /* recursion in tc= definitions */
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+ count++;
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+ strcpy(terminalname, &p[4]);
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+ q = terminalname;
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+ while (*q && *q != ':') q++;
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+ *q = 0;
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+ if (tgetent(buf, terminalname) != 1) {
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+ --count;
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+ return(0);
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+ }
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+ --count;
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+ for (q = buf; *q && *q != ':'; q++) { }
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+ strcpy(p, q);
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+ capab = savcapab;
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+ return(1);
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+}
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+
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+/*
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+ * tgetnum - get the numeric terminal capability corresponding
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+ * to id. Returns the value, -1 if invalid.
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+ */
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+int
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+tgetnum(id)
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+char *id;
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+{
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+ char *cp;
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+ int ret;
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+
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+ if ((cp = capab) == NULL || id == NULL)
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+ return(-1);
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+ while (*++cp != ':')
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+ ;
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+ while (*cp) {
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+ cp++;
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+ while (ISSPACE(*cp))
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+ cp++;
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+ if (strncmp(cp, id, CAPABLEN) == 0) {
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+ while (*cp && *cp != ':' && *cp != '#')
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+ cp++;
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+ if (*cp != '#')
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+ return(-1);
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+ for (ret = 0, cp++ ; *cp && ISDIGIT(*cp) ; cp++)
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+ ret = ret * 10 + *cp - '0';
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+ return(ret);
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+ }
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+ while (*cp && *cp != ':')
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+ cp++;
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+ }
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+ return(-1);
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+}
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+
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+/*
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+ * tgetflag - get the boolean flag corresponding to id. Returns -1
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+ * if invalid, 0 if the flag is not in termcap entry, or 1 if it is
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+ * present.
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+ */
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+int
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+tgetflag(id)
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+char *id;
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+{
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+ char *cp;
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+
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+ if ((cp = capab) == NULL || id == NULL)
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+ return(-1);
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+ while (*++cp != ':')
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+ ;
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+ while (*cp) {
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+ cp++;
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+ while (ISSPACE(*cp))
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+ cp++;
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+ if (strncmp(cp, id, CAPABLEN) == 0)
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+ return(1);
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+ while (*cp && *cp != ':')
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+ cp++;
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+ }
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+ return(0);
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+}
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+
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+/*
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+ * tgetstr - get the string capability corresponding to id and place
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+ * it in area (advancing area at same time). Expand escape sequences
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+ * etc. Returns the string, or NULL if it can't do it.
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+ */
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+char *
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+tgetstr(id, area)
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+char *id;
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+char **area;
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+{
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+ char *cp;
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+ char *ret;
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+ int i;
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+
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+ if ((cp = capab) == NULL || id == NULL)
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+ return(NULL);
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+ while (*++cp != ':')
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+ ;
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+ while (*cp) {
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+ cp++;
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+ while (ISSPACE(*cp))
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+ cp++;
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+ if (strncmp(cp, id, CAPABLEN) == 0) {
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+ while (*cp && *cp != ':' && *cp != '=')
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+ cp++;
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+ if (*cp != '=')
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+ return(NULL);
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+ for (ret = *area, cp++; *cp && *cp != ':' ; (*area)++, cp++)
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+ switch(*cp) {
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+ case '^' :
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+ **area = *++cp - 'A' + 1;
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+ break;
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+ case '\\' :
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+ switch(*++cp) {
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+ case 'E' :
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+ **area = '\033';
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+ break;
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+ case 'n' :
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+ **area = '\n';
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+ break;
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+ case 'r' :
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+ **area = '\r';
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+ break;
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+ case 't' :
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+ **area = '\t';
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+ break;
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+ case 'b' :
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+ **area = '\b';
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+ break;
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+ case 'f' :
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+ **area = '\f';
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+ break;
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+ case '0' :
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+ case '1' :
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+ case '2' :
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+ case '3' :
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+ for (i=0 ; *cp && ISDIGIT(*cp) ; cp++)
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+ i = i * 8 + *cp - '0';
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+ **area = i;
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+ cp--;
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+ break;
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+ case '^' :
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+ case '\\' :
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+ **area = *cp;
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+ break;
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+ }
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+ break;
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+ default :
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+ **area = *cp;
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+ }
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+ *(*area)++ = '\0';
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+ return(ret);
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+ }
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+ while (*cp && *cp != ':')
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+ cp++;
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+ }
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+ return(NULL);
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+}
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+
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+/*
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+ * tgoto - given the cursor motion string cm, make up the string
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+ * for the cursor to go to (destcol, destline), and return the string.
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+ * Returns "OOPS" if something's gone wrong, or the string otherwise.
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+ */
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+char *
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+tgoto(cm, destcol, destline)
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+char *cm;
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+int destcol;
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+int destline;
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+{
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+ register char *rp;
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+ static char ret[32];
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+ char added[16];
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+ int *dp = &destline;
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+ int numval;
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+ int swapped = 0;
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+
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+ added[0] = 0;
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+ for (rp = ret ; *cm ; cm++) {
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+ if (*cm == '%') {
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+ switch(*++cm) {
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+ case '>' :
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+ if (dp == NULL)
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+ return("OOPS");
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+ cm++;
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+ if (*dp > *cm++) {
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+ *dp += *cm;
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+ }
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+ break;
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+ case '+' :
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+ case '.' :
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+ if (dp == NULL)
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+ return("OOPS");
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+ if (*cm == '+') *dp = *dp + *++cm;
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+ for (;;) {
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+ switch(*dp) {
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+ case 0:
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+ case 04:
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+ case '\t':
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+ case '\n':
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+ /* filter these out */
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+ if (dp == &destcol || swapped || UP) {
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+ strcat(added, dp == &destcol || swapped ?
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+ (BC ? BC : "\b") :
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+ UP);
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+ (*dp)++;
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+ continue;
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+ }
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+ }
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+ break;
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+ }
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+ *rp++ = *dp;
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+ dp = (dp == &destline) ? &destcol : NULL;
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+ break;
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+
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+ case 'r' : {
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+ int tmp = destline;
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+
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+ destline = destcol;
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+ destcol = tmp;
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+ swapped = 1 - swapped;
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+ break;
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+ }
|
|
|
+ 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...
|
|
|
+ */
|