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freebsd/contrib/nvi/tcl_api/tcl.c
Peter Wemm b8ba871bd9 Import of nvi-1.79, minus a few bits that we dont need (eg: postscript
files, curses, db, regex etc that we already have).  The other glue will
follow shortly.

Obtained from: Keith Bostic <bostic@bostic.com>
1996-11-01 06:45:43 +00:00

853 lines
17 KiB
C

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995
* Keith Bostic. All rights reserved.
* Copyright (c) 1995
* George V. Neville-Neil. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)tcl.c 8.16 (Berkeley) 10/16/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tcl.h>
#include <termios.h>
#include <unistd.h>
#include "../common/common.h"
#include "tcl_extern.h"
static int getint __P((Tcl_Interp *, char *, char *, int *));
static int getscreenid __P((Tcl_Interp *, SCR **, char *, char *));
static void msghandler __P((SCR *, mtype_t, char *, size_t));
extern GS *__global_list; /* XXX */
/*
* INITMESSAGE --
* Macros to point messages at the Tcl message handler.
*/
#define INITMESSAGE \
scr_msg = __global_list->scr_msg; \
__global_list->scr_msg = msghandler;
#define ENDMESSAGE \
__global_list->scr_msg = scr_msg;
/*
* tcl_fscreen --
* Return the screen id associated with file name.
*
* Tcl Command: viFindScreen
* Usage: viFindScreen file
*/
static int
tcl_fscreen(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
if (argc != 2) {
Tcl_SetResult(interp, "Usage: viFindScreen file", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, NULL, argv[1]))
return (TCL_ERROR);
(void)sprintf(interp->result, "%d", sp->id);
return (TCL_OK);
}
/*
* tcl_aline --
* -- Append the string text after the line in lineNumber.
*
* Tcl Command: viAppendLine
* Usage: viAppendLine screenId lineNumber text
*/
static int
tcl_aline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int lno, rval;
if (argc != 4) {
Tcl_SetResult(interp,
"Usage: viAppendLine screenId lineNumber text", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL) ||
getint(interp, "line number", argv[2], &lno))
return (TCL_ERROR);
INITMESSAGE;
rval = api_aline(sp, (recno_t)lno, argv[3], strlen(argv[3]));
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_dline --
* Delete lineNum.
*
* Tcl Command: viDelLine
* Usage: viDelLine screenId lineNum
*/
static int
tcl_dline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int lno, rval;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viDelLine screenId lineNumber", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL) ||
getint(interp, "line number", argv[2], &lno))
return (TCL_ERROR);
INITMESSAGE;
rval = api_dline(sp, (recno_t)lno);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_gline --
* Return lineNumber.
*
* Tcl Command: viGetLine
* Usage: viGetLine screenId lineNumber
*/
static int
tcl_gline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
size_t len;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int lno, rval;
char *line, *p;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viGetLine screenId lineNumber", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL) ||
getint(interp, "line number", argv[2], &lno))
return (TCL_ERROR);
INITMESSAGE;
rval = api_gline(sp, (recno_t)lno, &p, &len);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
if ((line = malloc(len + 1)) == NULL)
exit(1); /* XXX */
memmove(line, p, len);
line[len] = '\0';
Tcl_SetResult(interp, line, TCL_DYNAMIC);
return (TCL_OK);
}
/*
* tcl_iline --
* Insert the string text after the line in lineNumber.
*
* Tcl Command: viInsertLine
* Usage: viInsertLine screenId lineNumber text
*/
static int
tcl_iline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int lno, rval;
if (argc != 4) {
Tcl_SetResult(interp,
"Usage: viInsertLine screenId lineNumber text", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL) ||
getint(interp, "line number", argv[2], &lno))
return (TCL_ERROR);
INITMESSAGE;
rval = api_iline(sp, (recno_t)lno, argv[3], strlen(argv[3]));
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_lline --
* Return the last line in the screen.
*
* Tcl Command: viLastLine
* Usage: viLastLine screenId
*/
static int
tcl_lline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
recno_t last;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
if (argc != 2) {
Tcl_SetResult(interp, "Usage: viLastLine screenId", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_lline(sp, &last);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
(void)sprintf(interp->result, "%lu", (unsigned long)last);
return (TCL_OK);
}
/*
* tcl_sline --
* Set lineNumber to the text supplied.
*
* Tcl Command: viSetLine
* Usage: viSetLine screenId lineNumber text
*/
static int
tcl_sline(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int lno, rval;
if (argc != 4) {
Tcl_SetResult(interp,
"Usage: viSetLine screenId lineNumber text", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL) ||
getint(interp, "line number", argv[2], &lno))
return (TCL_ERROR);
INITMESSAGE;
rval = api_sline(sp, (recno_t)lno, argv[3], strlen(argv[3]));
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_getmark --
* Return the mark's cursor position as a list with two elements.
* {line, column}.
*
* Tcl Command: viGetMark
* Usage: viGetMark screenId mark
*/
static int
tcl_getmark(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
MARK cursor;
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
char buf[20];
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viGetMark screenId mark", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_getmark(sp, (int)argv[2][0], &cursor);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
(void)snprintf(buf, sizeof(buf), "%lu", (u_long)cursor.lno);
Tcl_AppendElement(interp, buf);
(void)snprintf(buf, sizeof(buf), "%lu", (u_long)cursor.cno);
Tcl_AppendElement(interp, buf);
return (TCL_OK);
}
/*
* tcl_setmark --
* Set the mark to the line and column numbers supplied.
*
* Tcl Command: viSetMark
* Usage: viSetMark screenId mark line column
*/
static int
tcl_setmark(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
MARK cursor;
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int i, rval;
if (argc != 5) {
Tcl_SetResult(interp,
"Usage: viSetMark screenId mark line column", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
if (getint(interp, "line number", argv[3], &i))
return (TCL_ERROR);
cursor.lno = i;
if (getint(interp, "column number", argv[4], &i))
return (TCL_ERROR);
cursor.cno = i;
INITMESSAGE;
rval = api_setmark(sp, (int)argv[2][0], &cursor);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_getcursor --
* Return the current cursor position as a list with two elements.
* {line, column}.
*
* Tcl Command: viGetCursor
* Usage: viGetCursor screenId
*/
static int
tcl_getcursor(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
MARK cursor;
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
char buf[20];
if (argc != 2) {
Tcl_SetResult(interp,
"Usage: viGetCursor screenId", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_getcursor(sp, &cursor);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
(void)snprintf(buf, sizeof(buf), "%lu", (u_long)cursor.lno);
Tcl_AppendElement(interp, buf);
(void)snprintf(buf, sizeof(buf), "%lu", (u_long)cursor.cno);
Tcl_AppendElement(interp, buf);
return (TCL_OK);
}
/*
* tcl_setcursor --
* Set the cursor to the line and column numbers supplied.
*
* Tcl Command: viSetCursor
* Usage: viSetCursor screenId line column
*/
static int
tcl_setcursor(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
MARK cursor;
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int i, rval;
if (argc != 4) {
Tcl_SetResult(interp,
"Usage: viSetCursor screenId line column", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
if (getint(interp, "screen id", argv[2], &i))
return (TCL_ERROR);
cursor.lno = i;
if (getint(interp, "screen id", argv[3], &i))
return (TCL_ERROR);
cursor.cno = i;
INITMESSAGE;
rval = api_setcursor(sp, &cursor);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_msg --
* Set the message line to text.
*
* Tcl Command: viMsg
* Usage: viMsg screenId text
*/
static int
tcl_msg(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
if (argc != 3) {
Tcl_SetResult(interp, "Usage: viMsg screenId text", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
api_imessage(sp, argv[2]);
return (TCL_OK);
}
/*
* tcl_iscreen --
* Create a new screen. If a filename is specified then the screen
* is opened with that file.
*
* Tcl Command: viNewScreen
* Usage: viNewScreen screenId [file]
*/
static int
tcl_iscreen(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp, *nsp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
if (argc != 2 && argc != 3) {
Tcl_SetResult(interp,
"Usage: viNewScreen screenId [file]", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_edit(sp, argv[2], &nsp, 1);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
(void)sprintf(interp->result, "%d", nsp->id);
return (TCL_OK);
}
/*
* tcl_escreen --
* End a screen.
*
* Tcl Command: viEndScreen
* Usage: viEndScreen screenId
*/
static int
tcl_escreen(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
if (argc != 2) {
Tcl_SetResult(interp,
"Usage: viEndScreen screenId", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_escreen(sp);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_swscreen --
* Change the current focus to screen.
*
* Tcl Command: viSwitchScreen
* Usage: viSwitchScreen screenId screenId
*/
static int
tcl_swscreen(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp, *new;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viSwitchScreen cur_screenId new_screenId",
TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
if (getscreenid(interp, &new, argv[2], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_swscreen(sp, new);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_map --
* Associate a key with a tcl procedure.
*
* Tcl Command: viMapKey
* Usage: viMapKey screenId key tclproc
*/
static int
tcl_map(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
char command[256];
if (argc != 4) {
Tcl_SetResult(interp,
"Usage: viMapKey screenId key tclproc", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
(void)snprintf(command, sizeof(command), ":tcl %s\n", argv[3]);
rval = api_map(sp, argv[2], command, strlen(command));
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_unmap --
* Unmap a key.
*
* Tcl Command: viUnmapKey
* Usage: viUnmMapKey screenId key
*/
static int
tcl_unmap(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viUnmapKey screenId key", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_unmap(sp, argv[2]);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_opts_set --
* Set an option.
*
* Tcl Command: viSetOpt
* Usage: viSetOpt screenId command
*/
static int
tcl_opts_set(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
char *setting;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viSetOpt screenId command", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
/*rval = api_opts_set(sp, argv[2]);*/
MALLOC(sp, setting, char *, strlen(argv[2])+6);
strcpy(setting, ":set ");
strcpy(setting+5, argv[2]);
rval=api_run_str(sp, setting);
free(setting);
ENDMESSAGE;
return (rval ? TCL_ERROR : TCL_OK);
}
/*
* tcl_opts_get --
Return the value of an option.
*
* Tcl Command: viGetOpt
* Usage: viGetOpt screenId option
*/
static int
tcl_opts_get(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
SCR *sp;
void (*scr_msg) __P((SCR *, mtype_t, char *, size_t));
int rval;
char *value;
if (argc != 3) {
Tcl_SetResult(interp,
"Usage: viGetOpt screenId option", TCL_STATIC);
return (TCL_ERROR);
}
if (getscreenid(interp, &sp, argv[1], NULL))
return (TCL_ERROR);
INITMESSAGE;
rval = api_opts_get(sp, argv[2], &value, NULL);
ENDMESSAGE;
if (rval)
return (TCL_ERROR);
Tcl_SetResult(interp, value, TCL_DYNAMIC);
return (TCL_OK);
}
/*
* tcl_init --
* Create the TCL commands used by nvi.
*
* PUBLIC: int tcl_init __P((GS *));
*/
int
tcl_init(gp)
GS *gp;
{
gp->tcl_interp = Tcl_CreateInterp();
if (Tcl_Init(gp->tcl_interp) == TCL_ERROR)
return (1);
#define TCC(name, function) { \
Tcl_CreateCommand(gp->tcl_interp, name, function, \
(ClientData)NULL, (Tcl_CmdDeleteProc *)NULL); \
}
TCC("viAppendLine", tcl_aline);
TCC("viDelLine", tcl_dline);
TCC("viEndScreen", tcl_escreen);
TCC("viFindScreen", tcl_fscreen);
TCC("viGetCursor", tcl_getcursor);
TCC("viGetLine", tcl_gline);
TCC("viGetMark", tcl_getmark);
TCC("viGetOpt", tcl_opts_get);
TCC("viInsertLine", tcl_iline);
TCC("viLastLine", tcl_lline);
TCC("viMapKey", tcl_map);
TCC("viMsg", tcl_msg);
TCC("viNewScreen", tcl_iscreen);
TCC("viSetCursor", tcl_setcursor);
TCC("viSetLine", tcl_sline);
TCC("viSetMark", tcl_setmark);
TCC("viSetOpt", tcl_opts_set);
TCC("viSwitchScreen", tcl_swscreen);
TCC("viUnmapKey", tcl_unmap);
return (0);
}
/*
* getscreenid --
* Get the specified screen pointer.
*
* XXX
* This is fatal. We can't post a message into vi that we're unable to find
* the screen without first finding the screen... So, this must be the first
* thing a Tcl routine does, and, if it fails, the last as well.
*/
static int
getscreenid(interp, spp, id, name)
Tcl_Interp *interp;
SCR **spp;
char *id, *name;
{
int scr_no;
char buf[64];
if (id != NULL && getint(interp, "screen id", id, &scr_no))
return (1);
if ((*spp = api_fscreen(scr_no, name)) == NULL) {
(void)snprintf(buf, sizeof(buf),
"unknown screen id: %s", name == NULL ? id : name);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
return (1);
}
return (0);
}
/*
* getint --
* Get a Tcl integer.
*
* XXX
* This code assumes that both recno_t and size_t are larger than ints.
*/
static int
getint(interp, msg, s, intp)
Tcl_Interp *interp;
char *msg, *s;
int *intp;
{
char buf[64];
if (Tcl_GetInt(interp, s, intp) == TCL_ERROR)
return (1);
if (*intp < 0) {
(void)snprintf(buf, sizeof(buf),
"illegal %s %s: may not be negative", msg, s);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
return (1);
}
return (0);
}
/*
* msghandler --
* Tcl message routine so that error messages are processed in
* Tcl, not in nvi.
*/
static void
msghandler(sp, mtype, msg, len)
SCR *sp;
mtype_t mtype;
char *msg;
size_t len;
{
/* Replace the trailing <newline> with an EOS. */
msg[len - 1] = '\0';
Tcl_SetResult(sp->gp->tcl_interp, msg, TCL_VOLATILE);
}