--- /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
+ */
+#include <stdio.h>
+
+#define CAPABLEN 2
+
+#define ISSPACE(c) ((c) == ' ' || (c) == '\t' || (c) == '\r' || (c) == '\n')
+#define ISDIGIT(x) ((x) >= '0' && (x) <= '9')
+
+short ospeed; /* output speed */
+char PC; /* padding character */
+char *BC; /* back cursor movement */
+char *UP; /* up cursor movement */
+
+static char *capab; /* the capability itself */
+static int check_for_tc();
+static int match_name();
+
+extern char *getenv(); /* new, improved getenv */
+extern FILE *fopen(); /* old fopen */
+
+/*
+ * 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 *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";
+ if ((fp = fopen(file, "r")) == (FILE *) NULL)
+ 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);
+ fclose(fp);
+ return(check_for_tc());
+ }
+ }
+ fclose(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 */
+ strcpy(terminalname, &p[4]);
+ q = terminalname;
+ while (*q && *q != ':') q++;
+ *q = 0;
+ if (tgetent(buf, terminalname) != 1) return(0);
+ 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)
+ return(-1);
+ while (*++cp != ':')
+ ;
+ for (++cp ; *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)
+ return(-1);
+ while (*++cp != ':')
+ ;
+ for (++cp ; *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)
+ return(NULL);
+ while (*++cp != ':')
+ ;
+ for (++cp ; *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[24];
+ 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