334 lines
7.2 KiB
C
334 lines
7.2 KiB
C
/* $Header: /p/tcsh/cvsroot/tcsh/vms.termcap.c,v 1.11 2006/03/02 18:46:45 christos Exp $ */
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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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#include "sh.h"
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RCSID("$tcsh: vms.termcap.c,v 1.11 2006/03/02 18:46:45 christos Exp $")
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#if defined(_VMS_POSIX) || defined(_OSD_POSIX)
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/* efth 1988-Apr-29
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- Correct when TERM != name and TERMCAP is defined [tgetent]
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- Correct the comparison for the terminal name [tgetent]
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- Correct the value of ^x escapes [tgetstr]
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- Added %r to reverse row/column [tgoto]
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Paul Gillingwater <paul@actrix.gen.nz> July 1992
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- Modified to allow terminal aliases in termcap file
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- Uses TERMCAP environment variable for file only
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*/
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#include <stdio.h>
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#include <string.h>
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#define CAPABLEN 2
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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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char *capab; /* the capability itself */
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extern char *getenv(); /* new, improved getenv */
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#ifndef fopen
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extern FILE *fopen(); /* old fopen */
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#endif
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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(char *bp, char *name)
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{
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FILE *fp;
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char *termfile;
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char *cp,
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*ptr, /* temporary pointer */
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tmp[1024]; /* buffer for terminal name *//*FIXBUF*/
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size_t len = strlen(name);
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capab = bp;
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/* Use TERMCAP to override default. */
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termfile = getenv("TERMCAP");
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if (termfile == NULL ) termfile = "/etc/termcap";
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if ((fp = fopen(termfile, "r")) == (FILE *) NULL) {
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fprintf(stderr, CGETS(31, 1,
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"Can't open TERMCAP: [%s]\n"), termfile);
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fprintf(stderr, CGETS(31, 2, "Can't open %s.\n"), termfile);
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sleep(1);
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return(-1);
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}
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while (fgets(bp, 1024, fp) != NULL) {
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/* Any line starting with # or NL is skipped as a comment */
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if ((*bp == '#') || (*bp == '\n')) continue;
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/* Look for lines which end with two backslashes,
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and then append the next line. */
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while (*(cp = &bp[strlen(bp) - 2]) == '\\')
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fgets(cp, 1024, fp);
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/* Skip over any spaces or tabs */
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for (++cp ; ISSPACE(*cp) ; cp++);
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/* Make sure "name" matches exactly (efth) */
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/* Here we might want to look at any aliases as well. We'll use
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sscanf to look at aliases. These are delimited by '|'. */
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sscanf(bp,"%[^|]",tmp);
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if (strncmp(name, tmp, len) == 0) {
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fclose(fp);
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#ifdef DEBUG
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fprintf(stderr, CGETS(31, 3, "Found %s in %s.\n"), name, termfile);
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sleep(1);
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#endif /* DEBUG */
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return(1);
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}
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ptr = bp;
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while ((ptr = strchr(ptr,'|')) != NULL) {
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ptr++;
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if (strchr(ptr,'|') == NULL) break;
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sscanf(ptr,"%[^|]",tmp);
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if (strncmp(name, tmp, len) == 0) {
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fclose(fp);
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#ifdef DEBUG
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fprintf(stderr,CGETS(31, 3, "Found %s in %s.\n"), name, termfile);
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sleep(1);
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#endif /* DEBUG */
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return(1);
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}
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}
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}
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/* If we get here, then we haven't found a match. */
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fclose(fp);
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#ifdef DEBUG
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fprintf(stderr,CGETS(31, 4, "No match found for %s in file %s\n"),
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name, termfile);
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sleep(1);
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#endif /* DEBUG */
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return(0);
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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(char *id)
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{
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char *cp;
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int ret;
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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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for (++cp ; *cp ; 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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* 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(char *id)
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{
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char *cp;
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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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for (++cp ; *cp ; 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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* 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(char *id, 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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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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for (++cp ; *cp ; 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 != ':' ;
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(*area)++, cp++)
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switch(*cp) {
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case '^' :
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**area = *++cp - '@'; /* fix (efth)*/
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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 = CTL_ESC('\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) ;
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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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* 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(char *cm, int destcol, int destline)
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{
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char *rp;
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static char ret[24];
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int incr = 0;
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int argno = 0, numval;
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for (rp = ret ; *cm ; cm++) {
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switch(*cm) {
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case '%' :
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switch(*++cm) {
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case '+' :
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numval = (argno == 0 ? destline : destcol);
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argno = 1 - argno;
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*rp++ = numval + incr + *++cm;
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break;
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case '%' :
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*rp++ = '%';
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break;
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case 'i' :
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incr = 1;
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break;
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case 'd' :
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numval = (argno == 0 ? destline : destcol);
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numval += incr;
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argno = 1 - argno;
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*rp++ = '0' + (numval/10);
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*rp++ = '0' + (numval%10);
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break;
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case 'r' :
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argno = 1;
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break;
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}
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break;
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default :
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*rp++ = *cm;
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}
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}
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*rp = '\0';
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return(ret);
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}
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/*
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* tputs - put the string cp out onto the terminal, using the function
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* outc. This should do padding for the terminal, but I can't find a
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* terminal that needs padding at the moment...
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*/
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int
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tputs(char *cp, int affcnt, int (*outc)())
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{
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unsigned long delay = 0;
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if (cp == NULL)
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return(1);
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/* do any padding interpretation - left null for MINIX just now */
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for (delay = 0; *cp && ISDIGIT(*cp) ; cp++)
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delay = delay * 10 + *cp - '0';
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while (*cp)
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(*outc)(*cp++);
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#ifdef _OSD_POSIX
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usleep(delay*100); /* strictly spoken, it should be *1000 */
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#endif
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return(1);
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}
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#endif /* _VMS_POSIX || _OSD_POSIX */
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