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freebsd-skq/contrib/nvi/common/api.c
peter 59cc89c2c2 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

526 lines
9.0 KiB
C
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/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* 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[] = "@(#)api.c 8.26 (Berkeley) 10/14/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "../common/common.h"
extern GS *__global_list; /* XXX */
/*
* api_fscreen --
* Return a pointer to the screen specified by the screen id
* or a file name.
*
* PUBLIC: SCR *api_fscreen __P((int, char *));
*/
SCR *
api_fscreen(id, name)
int id;
char *name;
{
GS *gp;
SCR *tsp;
gp = __global_list;
/* Search the displayed list. */
for (tsp = gp->dq.cqh_first;
tsp != (void *)&gp->dq; tsp = tsp->q.cqe_next)
if (name == NULL) {
if (id == tsp->id)
return (tsp);
} else if (!strcmp(name, tsp->frp->name))
return (tsp);
/* Search the hidden list. */
for (tsp = gp->hq.cqh_first;
tsp != (void *)&gp->hq; tsp = tsp->q.cqe_next)
if (name == NULL) {
if (id == tsp->id)
return (tsp);
} else if (!strcmp(name, tsp->frp->name))
return (tsp);
return (NULL);
}
/*
* api_aline --
* Append a line.
*
* PUBLIC: int api_aline __P((SCR *, recno_t, char *, size_t));
*/
int
api_aline(sp, lno, line, len)
SCR *sp;
recno_t lno;
char *line;
size_t len;
{
return (db_append(sp, 1, lno, line, len));
}
/*
* api_dline --
* Delete a line.
*
* PUBLIC: int api_dline __P((SCR *, recno_t));
*/
int
api_dline(sp, lno)
SCR *sp;
recno_t lno;
{
return (db_delete(sp, lno));
}
/*
* api_gline --
* Get a line.
*
* PUBLIC: int api_gline __P((SCR *, recno_t, char **, size_t *));
*/
int
api_gline(sp, lno, linepp, lenp)
SCR *sp;
recno_t lno;
char **linepp;
size_t *lenp;
{
int isempty;
if (db_eget(sp, lno, linepp, lenp, &isempty)) {
if (isempty)
msgq(sp, M_ERR, "209|The file is empty");
return (1);
}
return (0);
}
/*
* api_iline --
* Insert a line.
*
* PUBLIC: int api_iline __P((SCR *, recno_t, char *, size_t));
*/
int
api_iline(sp, lno, line, len)
SCR *sp;
recno_t lno;
char *line;
size_t len;
{
return (db_insert(sp, lno, line, len));
}
/*
* api_lline --
* Return the line number of the last line in the file.
*
* PUBLIC: int api_lline __P((SCR *, recno_t *));
*/
int
api_lline(sp, lnop)
SCR *sp;
recno_t *lnop;
{
return (db_last(sp, lnop));
}
/*
* api_sline --
* Set a line.
*
* PUBLIC: int api_sline __P((SCR *, recno_t, char *, size_t));
*/
int
api_sline(sp, lno, line, len)
SCR *sp;
recno_t lno;
char *line;
size_t len;
{
return (db_set(sp, lno, line, len));
}
/*
* api_getmark --
* Get the mark.
*
* PUBLIC: int api_getmark __P((SCR *, int, MARK *));
*/
int
api_getmark(sp, markname, mp)
SCR *sp;
int markname;
MARK *mp;
{
return (mark_get(sp, (ARG_CHAR_T)markname, mp, M_ERR));
}
/*
* api_setmark --
* Set the mark.
*
* PUBLIC: int api_setmark __P((SCR *, int, MARK *));
*/
int
api_setmark(sp, markname, mp)
SCR *sp;
int markname;
MARK *mp;
{
return (mark_set(sp, (ARG_CHAR_T)markname, mp, 1));
}
/*
* api_nextmark --
* Return the first mark if next not set, otherwise return the
* subsequent mark.
*
* PUBLIC: int api_nextmark __P((SCR *, int, char *));
*/
int
api_nextmark(sp, next, namep)
SCR *sp;
int next;
char *namep;
{
LMARK *mp;
mp = sp->ep->marks.lh_first;
if (next)
for (; mp != NULL; mp = mp->q.le_next)
if (mp->name == *namep) {
mp = mp->q.le_next;
break;
}
if (mp == NULL)
return (1);
*namep = mp->name;
return (0);
}
/*
* api_getcursor --
* Get the cursor.
*
* PUBLIC: int api_getcursor __P((SCR *, MARK *));
*/
int
api_getcursor(sp, mp)
SCR *sp;
MARK *mp;
{
mp->lno = sp->lno;
mp->cno = sp->cno;
return (0);
}
/*
* api_setcursor --
* Set the cursor.
*
* PUBLIC: int api_setcursor __P((SCR *, MARK *));
*/
int
api_setcursor(sp, mp)
SCR *sp;
MARK *mp;
{
size_t len;
if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
return (1);
if (mp->cno < 0 || mp->cno > len) {
msgq(sp, M_ERR, "Cursor set to nonexistent column");
return (1);
}
/* Set the cursor. */
sp->lno = mp->lno;
sp->cno = mp->cno;
return (0);
}
/*
* api_emessage --
* Print an error message.
*
* PUBLIC: void api_emessage __P((SCR *, char *));
*/
void
api_emessage(sp, text)
SCR *sp;
char *text;
{
msgq(sp, M_ERR, "%s", text);
}
/*
* api_imessage --
* Print an informational message.
*
* PUBLIC: void api_imessage __P((SCR *, char *));
*/
void
api_imessage(sp, text)
SCR *sp;
char *text;
{
msgq(sp, M_INFO, "%s", text);
}
/*
* api_edit
* Create a new screen and return its id
* or edit a new file in the current screen.
*
* PUBLIC: int api_edit __P((SCR *, char *, SCR **, int));
*/
int
api_edit(sp, file, spp, newscreen)
SCR *sp;
char *file;
SCR **spp;
int newscreen;
{
ARGS *ap[2], a;
EXCMD cmd;
if (file) {
ex_cinit(&cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0, ap);
ex_cadd(&cmd, &a, file, strlen(file));
} else
ex_cinit(&cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0, NULL);
if (newscreen)
cmd.flags |= E_NEWSCREEN; /* XXX */
if (cmd.cmd->fn(sp, &cmd))
return (1);
*spp = sp->nextdisp;
return (0);
}
/*
* api_escreen
* End a screen.
*
* PUBLIC: int api_escreen __P((SCR *));
*/
int
api_escreen(sp)
SCR *sp;
{
EXCMD cmd;
/*
* XXX
* If the interpreter exits anything other than the current
* screen, vi isn't going to update everything correctly.
*/
ex_cinit(&cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0, NULL);
return (cmd.cmd->fn(sp, &cmd));
}
/*
* api_swscreen --
* Switch to a new screen.
*
* PUBLIC: int api_swscreen __P((SCR *, SCR *));
*/
int
api_swscreen(sp, new)
SCR *sp, *new;
{
/*
* XXX
* If the interpreter switches from anything other than the
* current screen, vi isn't going to update everything correctly.
*/
sp->nextdisp = new;
F_SET(sp, SC_SSWITCH);
return (0);
}
/*
* api_map --
* Map a key.
*
* PUBLIC: int api_map __P((SCR *, char *, char *, size_t));
*/
int
api_map(sp, name, map, len)
SCR *sp;
char *name, *map;
size_t len;
{
ARGS *ap[3], a, b;
EXCMD cmd;
ex_cinit(&cmd, C_MAP, 0, OOBLNO, OOBLNO, 0, ap);
ex_cadd(&cmd, &a, name, strlen(name));
ex_cadd(&cmd, &b, map, len);
return (cmd.cmd->fn(sp, &cmd));
}
/*
* api_unmap --
* Unmap a key.
*
* PUBLIC: int api_unmap __P((SCR *, char *));
*/
int
api_unmap(sp, name)
SCR *sp;
char *name;
{
ARGS *ap[2], a;
EXCMD cmd;
ex_cinit(&cmd, C_UNMAP, 0, OOBLNO, OOBLNO, 0, ap);
ex_cadd(&cmd, &a, name, strlen(name));
return (cmd.cmd->fn(sp, &cmd));
}
/*
* api_opts_get --
* Return a option value as a string, in allocated memory.
* If the option is of type boolean, boolvalue is (un)set
* according to the value; otherwise boolvalue is -1.
*
* PUBLIC: int api_opts_get __P((SCR *, char *, char **, int *));
*/
int
api_opts_get(sp, name, value, boolvalue)
SCR *sp;
char *name, **value;
int *boolvalue;
{
OPTLIST const *op;
int offset;
if ((op = opts_search(name)) == NULL) {
opts_nomatch(sp, name);
return (1);
}
offset = op - optlist;
if (boolvalue != NULL)
*boolvalue = -1;
switch (op->type) {
case OPT_0BOOL:
case OPT_1BOOL:
MALLOC_RET(sp, *value, char *, strlen(op->name) + 2 + 1);
(void)sprintf(*value,
"%s%s", O_ISSET(sp, offset) ? "" : "no", op->name);
if (boolvalue != NULL)
*boolvalue = O_ISSET(sp, offset);
break;
case OPT_NUM:
MALLOC_RET(sp, *value, char *, 20);
(void)sprintf(*value, "%lu", (u_long)O_VAL(sp, offset));
break;
case OPT_STR:
if (O_STR(sp, offset) == NULL) {
MALLOC_RET(sp, *value, char *, 2);
value[0] = '\0';
} else {
MALLOC_RET(sp,
*value, char *, strlen(O_STR(sp, offset)) + 1);
(void)sprintf(*value, "%s", O_STR(sp, offset));
}
break;
}
return (0);
}
/*
* api_opts_set --
* Set options.
*
* PUBLIC: int api_opts_set __P((SCR *, char *, char *, u_long, int));
*/
int
api_opts_set(sp, name, str_value, num_value, bool_value)
SCR *sp;
char *name, *str_value;
u_long num_value;
int bool_value;
{
ARGS *ap[2], a, b;
OPTLIST const *op;
int rval;
size_t blen;
char *bp;
if ((op = opts_search(name)) == NULL) {
opts_nomatch(sp, name);
return (1);
}
switch (op->type) {
case OPT_0BOOL:
case OPT_1BOOL:
GET_SPACE_RET(sp, bp, blen, 64);
a.len = snprintf(bp, 64, "%s%s", bool_value ? "" : "no", name);
break;
case OPT_NUM:
GET_SPACE_RET(sp, bp, blen, 64);
a.len = snprintf(bp, 64, "%s=%lu", name, num_value);
break;
case OPT_STR:
GET_SPACE_RET(sp, bp, blen, 1024);
a.len = snprintf(bp, 1024, "%s=%s", name, str_value);
break;
}
a.bp = bp;
b.len = 0;
b.bp = NULL;
ap[0] = &a;
ap[1] = &b;
rval = opts_set(sp, ap, NULL);
FREE_SPACE(sp, bp, blen);
return (rval);
}
/*
* api_run_str --
* Execute a string as an ex command.
*
* PUBLIC: int api_run_str __P((SCR *, char *));
*/
int
api_run_str(sp, cmd)
SCR *sp;
char *cmd;
{
return (ex_run_str(sp, NULL, cmd, strlen(cmd), 0, 0));
}
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