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| Current File : //compat/linux/proc/68247/root/usr/src/contrib/nvi/common/msg.c |
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1991, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)msg.c 10.48 (Berkeley) 9/15/96";
#endif /* not lint */
#include <sys/param.h>
#include <sys/types.h> /* XXX: param.h may not have included types.h */
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "common.h"
#include "../vi/vi.h"
/*
* msgq --
* Display a message.
*
* PUBLIC: void msgq __P((SCR *, mtype_t, const char *, ...));
*/
void
#ifdef __STDC__
msgq(SCR *sp, mtype_t mt, const char *fmt, ...)
#else
msgq(sp, mt, fmt, va_alist)
SCR *sp;
mtype_t mt;
const char *fmt;
va_dcl
#endif
{
#ifndef NL_ARGMAX
#define __NL_ARGMAX 20 /* Set to 9 by System V. */
struct {
const char *str; /* String pointer. */
size_t arg; /* Argument number. */
size_t prefix; /* Prefix string length. */
size_t skip; /* Skipped string length. */
size_t suffix; /* Suffix string length. */
} str[__NL_ARGMAX];
#endif
static int reenter; /* STATIC: Re-entrancy check. */
CHAR_T ch;
GS *gp;
size_t blen, cnt1, cnt2, len, mlen, nlen, soff;
const char *p, *t, *u;
char *bp, *mp, *rbp, *s_rbp;
va_list ap;
/*
* !!!
* It's possible to enter msg when there's no screen to hold the
* message. If sp is NULL, ignore the special cases and put the
* message out to stderr.
*/
if (sp == NULL) {
gp = NULL;
if (mt == M_BERR)
mt = M_ERR;
else if (mt == M_VINFO)
mt = M_INFO;
} else {
gp = sp->gp;
switch (mt) {
case M_BERR:
if (F_ISSET(sp, SC_VI) && !O_ISSET(sp, O_VERBOSE)) {
F_SET(gp, G_BELLSCHED);
return;
}
mt = M_ERR;
break;
case M_VINFO:
if (!O_ISSET(sp, O_VERBOSE))
return;
mt = M_INFO;
/* FALLTHROUGH */
case M_INFO:
if (F_ISSET(sp, SC_EX_SILENT))
return;
break;
case M_ERR:
case M_SYSERR:
break;
default:
abort();
}
}
/*
* It's possible to reenter msg when it allocates space. We're
* probably dead anyway, but there's no reason to drop core.
*
* XXX
* Yes, there's a race, but it should only be two instructions.
*/
if (reenter++)
return;
/* Get space for the message. */
nlen = 1024;
if (0) {
retry: FREE_SPACE(sp, bp, blen);
nlen *= 2;
}
bp = NULL;
blen = 0;
GET_SPACE_GOTO(sp, bp, blen, nlen);
/*
* Error prefix.
*
* mp: pointer to the current next character to be written
* mlen: length of the already written characters
* blen: total length of the buffer
*/
#define REM (blen - mlen)
mp = bp;
mlen = 0;
if (mt == M_SYSERR) {
p = msg_cat(sp, "020|Error: ", &len);
if (REM < len)
goto retry;
memcpy(mp, p, len);
mp += len;
mlen += len;
}
/*
* If we're running an ex command that the user didn't enter, display
* the file name and line number prefix.
*/
if ((mt == M_ERR || mt == M_SYSERR) &&
sp != NULL && gp != NULL && gp->if_name != NULL) {
for (p = gp->if_name; *p != '\0'; ++p) {
len = snprintf(mp, REM, "%s", KEY_NAME(sp, *p));
mp += len;
if ((mlen += len) > blen)
goto retry;
}
len = snprintf(mp, REM, ", %d: ", gp->if_lno);
mp += len;
if ((mlen += len) > blen)
goto retry;
}
/* If nothing to format, we're done. */
if (fmt == NULL)
goto nofmt;
fmt = msg_cat(sp, fmt, NULL);
#ifndef NL_ARGMAX
/*
* Nvi should run on machines that don't support the numbered argument
* specifications (%[digit]*$). We do this by reformatting the string
* so that we can hand it to vsprintf(3) and it will use the arguments
* in the right order. When vsprintf returns, we put the string back
* into the right order. It's undefined, according to SVID III, to mix
* numbered argument specifications with the standard style arguments,
* so this should be safe.
*
* In addition, we also need a character that is known to not occur in
* any vi message, for separating the parts of the string. As callers
* of msgq are responsible for making sure that all the non-printable
* characters are formatted for printing before calling msgq, we use a
* random non-printable character selected at terminal initialization
* time. This code isn't fast by any means, but as messages should be
* relatively short and normally have only a few arguments, it won't be
* too bad. Regardless, nobody has come up with any other solution.
*
* The result of this loop is an array of pointers into the message
* string, with associated lengths and argument numbers. The array
* is in the "correct" order, and the arg field contains the argument
* order.
*/
for (p = fmt, soff = 0; soff < __NL_ARGMAX;) {
for (t = p; *p != '\0' && *p != '%'; ++p);
if (*p == '\0')
break;
++p;
if (!isdigit(*p)) {
if (*p == '%')
++p;
continue;
}
for (u = p; *++p != '\0' && isdigit(*p););
if (*p != '$')
continue;
/* Up to, and including the % character. */
str[soff].str = t;
str[soff].prefix = u - t;
/* Up to, and including the $ character. */
str[soff].arg = atoi(u);
str[soff].skip = (p - u) + 1;
if (str[soff].arg >= __NL_ARGMAX)
goto ret;
/* Up to, and including the conversion character. */
for (u = p; (ch = *++p) != '\0';)
if (isalpha(ch) &&
strchr("diouxXfeEgGcspn", ch) != NULL)
break;
str[soff].suffix = p - u;
if (ch != '\0')
++p;
++soff;
}
/* If no magic strings, we're done. */
if (soff == 0)
goto format;
/* Get space for the reordered strings. */
if ((rbp = malloc(nlen)) == NULL)
goto ret;
s_rbp = rbp;
/*
* Reorder the strings into the message string based on argument
* order.
*
* !!!
* We ignore arguments that are out of order, i.e. if we don't find
* an argument, we continue. Assume (almost certainly incorrectly)
* that whoever created the string knew what they were doing.
*
* !!!
* Brute force "sort", but since we don't expect more than one or two
* arguments in a string, the setup cost of a fast sort will be more
* expensive than the loop.
*/
for (cnt1 = 1; cnt1 <= soff; ++cnt1)
for (cnt2 = 0; cnt2 < soff; ++cnt2)
if (cnt1 == str[cnt2].arg) {
memmove(s_rbp, str[cnt2].str, str[cnt2].prefix);
memmove(s_rbp + str[cnt2].prefix,
str[cnt2].str + str[cnt2].prefix +
str[cnt2].skip, str[cnt2].suffix);
s_rbp += str[cnt2].prefix + str[cnt2].suffix;
*s_rbp++ =
gp == NULL ? DEFAULT_NOPRINT : gp->noprint;
break;
}
*s_rbp = '\0';
fmt = rbp;
#endif
format: /* Format the arguments into the string. */
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
len = vsnprintf(mp, REM, fmt, ap);
va_end(ap);
if (len >= nlen)
goto retry;
#ifndef NL_ARGMAX
if (soff == 0)
goto nofmt;
/*
* Go through the resulting string, and, for each separator character
* separated string, enter its new starting position and length in the
* array.
*/
for (p = t = mp, cnt1 = 1,
ch = gp == NULL ? DEFAULT_NOPRINT : gp->noprint; *p != '\0'; ++p)
if (*p == ch) {
for (cnt2 = 0; cnt2 < soff; ++cnt2)
if (str[cnt2].arg == cnt1)
break;
str[cnt2].str = t;
str[cnt2].prefix = p - t;
t = p + 1;
++cnt1;
}
/*
* Reorder the strings once again, putting them back into the
* message buffer.
*
* !!!
* Note, the length of the message gets decremented once for
* each substring, when we discard the separator character.
*/
for (s_rbp = rbp, cnt1 = 0; cnt1 < soff; ++cnt1) {
memmove(rbp, str[cnt1].str, str[cnt1].prefix);
rbp += str[cnt1].prefix;
--len;
}
memmove(mp, s_rbp, rbp - s_rbp);
/* Free the reordered string memory. */
free(s_rbp);
#endif
nofmt: mp += len;
if ((mlen += len) > blen)
goto retry;
if (mt == M_SYSERR) {
len = snprintf(mp, REM, ": %s", strerror(errno));
mp += len;
if ((mlen += len) > blen)
goto retry;
mt = M_ERR;
}
/* Add trailing newline. */
if ((mlen += 1) > blen)
goto retry;
*mp = '\n';
if (sp != NULL)
(void)ex_fflush(sp);
if (gp != NULL)
gp->scr_msg(sp, mt, bp, mlen);
else
(void)fprintf(stderr, "%.*s", (int)mlen, bp);
/* Cleanup. */
ret: FREE_SPACE(sp, bp, blen);
alloc_err:
reenter = 0;
}
/*
* msgq_str --
* Display a message with an embedded string.
*
* PUBLIC: void msgq_str __P((SCR *, mtype_t, char *, char *));
*/
void
msgq_str(sp, mtype, str, fmt)
SCR *sp;
mtype_t mtype;
char *str, *fmt;
{
int nf, sv_errno;
char *p;
if (str == NULL) {
msgq(sp, mtype, fmt);
return;
}
sv_errno = errno;
p = msg_print(sp, str, &nf);
errno = sv_errno;
msgq(sp, mtype, fmt, p);
if (nf)
FREE_SPACE(sp, p, 0);
}
/*
* mod_rpt --
* Report on the lines that changed.
*
* !!!
* Historic vi documentation (USD:15-8) claimed that "The editor will also
* always tell you when a change you make affects text which you cannot see."
* This wasn't true -- edit a large file and do "100d|1". We don't implement
* this semantic since it requires tracking each line that changes during a
* command instead of just keeping count.
*
* Line counts weren't right in historic vi, either. For example, given the
* file:
* abc
* def
* the command 2d}, from the 'b' would report that two lines were deleted,
* not one.
*
* PUBLIC: void mod_rpt __P((SCR *));
*/
void
mod_rpt(sp)
SCR *sp;
{
static char * const action[] = {
"293|added",
"294|changed",
"295|deleted",
"296|joined",
"297|moved",
"298|shifted",
"299|yanked",
};
static char * const lines[] = {
"300|line",
"301|lines",
};
recno_t total;
u_long rptval;
int first, cnt;
size_t blen, len, tlen;
const char *t;
char * const *ap;
char *bp, *p;
/* Change reports are turned off in batch mode. */
if (F_ISSET(sp, SC_EX_SILENT))
return;
/* Reset changing line number. */
sp->rptlchange = OOBLNO;
/*
* Don't build a message if not enough changed.
*
* !!!
* And now, a vi clone test. Historically, vi reported if the number
* of changed lines was > than the value, not >=, unless it was a yank
* command, which used >=. No lie. Furthermore, an action was never
* reported for a single line action. This is consistent for actions
* other than yank, but yank didn't report single line actions even if
* the report edit option was set to 1. In addition, setting report to
* 0 in the 4BSD historic vi was equivalent to setting it to 1, for an
* unknown reason (this bug was fixed in System III/V at some point).
* I got complaints, so nvi conforms to System III/V historic practice
* except that we report a yank of 1 line if report is set to 1.
*/
#define ARSIZE(a) sizeof(a) / sizeof (*a)
#define MAXNUM 25
rptval = O_VAL(sp, O_REPORT);
for (cnt = 0, total = 0; cnt < ARSIZE(action); ++cnt)
total += sp->rptlines[cnt];
if (total == 0)
return;
if (total <= rptval && sp->rptlines[L_YANKED] < rptval) {
for (cnt = 0; cnt < ARSIZE(action); ++cnt)
sp->rptlines[cnt] = 0;
return;
}
/* Build and display the message. */
GET_SPACE_GOTO(sp, bp, blen, sizeof(action) * MAXNUM + 1);
for (p = bp, first = 1, tlen = 0,
ap = action, cnt = 0; cnt < ARSIZE(action); ++ap, ++cnt)
if (sp->rptlines[cnt] != 0) {
if (first)
first = 0;
else {
*p++ = ';';
*p++ = ' ';
tlen += 2;
}
len = snprintf(p, MAXNUM, "%lu ",
(u_long)sp->rptlines[cnt]);
p += len;
tlen += len;
t = msg_cat(sp,
lines[sp->rptlines[cnt] == 1 ? 0 : 1], &len);
memcpy(p, t, len);
p += len;
tlen += len;
*p++ = ' ';
++tlen;
t = msg_cat(sp, *ap, &len);
memcpy(p, t, len);
p += len;
tlen += len;
sp->rptlines[cnt] = 0;
}
/* Add trailing newline. */
*p = '\n';
++tlen;
(void)ex_fflush(sp);
sp->gp->scr_msg(sp, M_INFO, bp, tlen);
FREE_SPACE(sp, bp, blen);
alloc_err:
return;
#undef ARSIZE
#undef MAXNUM
}
/*
* msgq_status --
* Report on the file's status.
*
* PUBLIC: void msgq_status __P((SCR *, recno_t, u_int));
*/
void
msgq_status(sp, lno, flags)
SCR *sp;
recno_t lno;
u_int flags;
{
static int poisoned;
recno_t last;
size_t blen, len;
int cnt, needsep;
const char *t;
char **ap, *bp, *np, *p, *s;
/* Get sufficient memory. */
len = strlen(sp->frp->name);
GET_SPACE_GOTO(sp, bp, blen, len * MAX_CHARACTER_COLUMNS + 128);
p = bp;
/* Copy in the filename. */
for (p = bp, t = sp->frp->name; *t != '\0'; ++t) {
len = KEY_LEN(sp, *t);
memcpy(p, KEY_NAME(sp, *t), len);
p += len;
}
np = p;
*p++ = ':';
*p++ = ' ';
/* Copy in the argument count. */
if (F_ISSET(sp, SC_STATUS_CNT) && sp->argv != NULL) {
for (cnt = 0, ap = sp->argv; *ap != NULL; ++ap, ++cnt);
if (cnt > 1) {
(void)sprintf(p,
msg_cat(sp, "317|%d files to edit", NULL), cnt);
p += strlen(p);
*p++ = ':';
*p++ = ' ';
}
F_CLR(sp, SC_STATUS_CNT);
}
/*
* See nvi/exf.c:file_init() for a description of how and when the
* read-only bit is set.
*
* !!!
* The historic display for "name changed" was "[Not edited]".
*/
needsep = 0;
if (F_ISSET(sp->frp, FR_NEWFILE)) {
F_CLR(sp->frp, FR_NEWFILE);
t = msg_cat(sp, "021|new file", &len);
memcpy(p, t, len);
p += len;
needsep = 1;
} else {
if (F_ISSET(sp->frp, FR_NAMECHANGE)) {
t = msg_cat(sp, "022|name changed", &len);
memcpy(p, t, len);
p += len;
needsep = 1;
}
if (needsep) {
*p++ = ',';
*p++ = ' ';
}
if (F_ISSET(sp->ep, F_MODIFIED))
t = msg_cat(sp, "023|modified", &len);
else
t = msg_cat(sp, "024|unmodified", &len);
memcpy(p, t, len);
p += len;
needsep = 1;
}
if (F_ISSET(sp->frp, FR_UNLOCKED)) {
if (needsep) {
*p++ = ',';
*p++ = ' ';
}
t = msg_cat(sp, "025|UNLOCKED", &len);
memcpy(p, t, len);
p += len;
needsep = 1;
}
if (O_ISSET(sp, O_READONLY)) {
if (needsep) {
*p++ = ',';
*p++ = ' ';
}
t = msg_cat(sp, "026|readonly", &len);
memcpy(p, t, len);
p += len;
needsep = 1;
}
if (needsep) {
*p++ = ':';
*p++ = ' ';
}
if (LF_ISSET(MSTAT_SHOWLAST)) {
if (db_last(sp, &last))
return;
if (last == 0) {
t = msg_cat(sp, "028|empty file", &len);
memcpy(p, t, len);
p += len;
} else {
t = msg_cat(sp, "027|line %lu of %lu [%lu%%]", &len);
(void)sprintf(p, t, (u_long)lno, (u_long)last,
(u_long)(lno * 100) / last);
p += strlen(p);
}
} else {
t = msg_cat(sp, "029|line %lu", &len);
(void)sprintf(p, t, (u_long)lno);
p += strlen(p);
}
#ifdef DEBUG
(void)sprintf(p, " (pid %lu)", (u_long)getpid());
p += strlen(p);
#endif
*p++ = '\n';
len = p - bp;
/*
* There's a nasty problem with long path names. Cscope and tags files
* can result in long paths and vi will request a continuation key from
* the user as soon as it starts the screen. Unfortunately, the user
* has already typed ahead, and chaos results. If we assume that the
* characters in the filenames and informational messages only take a
* single screen column each, we can trim the filename.
*
* XXX
* Status lines get put up at fairly awkward times. For example, when
* you do a filter read (e.g., :read ! echo foo) in the top screen of a
* split screen, we have to repaint the status lines for all the screens
* below the top screen. We don't want users having to enter continue
* characters for those screens. Make it really hard to screw this up.
*/
s = bp;
if (LF_ISSET(MSTAT_TRUNCATE) && len > sp->cols) {
for (; s < np && (*s != '/' || (p - s) > sp->cols - 3); ++s);
if (s == np) {
s = p - (sp->cols - 5);
*--s = ' ';
}
*--s = '.';
*--s = '.';
*--s = '.';
len = p - s;
}
/* Flush any waiting ex messages. */
(void)ex_fflush(sp);
sp->gp->scr_msg(sp, M_INFO, s, len);
FREE_SPACE(sp, bp, blen);
alloc_err:
return;
}
/*
* msg_open --
* Open the message catalogs.
*
* PUBLIC: int msg_open __P((SCR *, char *));
*/
int
msg_open(sp, file)
SCR *sp;
char *file;
{
/*
* !!!
* Assume that the first file opened is the system default, and that
* all subsequent ones user defined. Only display error messages
* if we can't open the user defined ones -- it's useful to know if
* the system one wasn't there, but if nvi is being shipped with an
* installed system, the file will be there, if it's not, then the
* message will be repeated every time nvi is started up.
*/
static int first = 1;
DB *db;
DBT data, key;
recno_t msgno;
char *p, *t, buf[MAXPATHLEN];
if ((p = strrchr(file, '/')) != NULL && p[1] == '\0' &&
((t = getenv("LC_MESSAGES")) != NULL && t[0] != '\0' ||
(t = getenv("LANG")) != NULL && t[0] != '\0')) {
(void)snprintf(buf, sizeof(buf), "%s%s", file, t);
p = buf;
} else
p = file;
if ((db = dbopen(p,
O_NONBLOCK | O_RDONLY, 0, DB_RECNO, NULL)) == NULL) {
if (first) {
first = 0;
return (1);
}
msgq_str(sp, M_SYSERR, p, "%s");
return (1);
}
/*
* Test record 1 for the magic string. The msgq call is here so
* the message catalog build finds it.
*/
#define VMC "VI_MESSAGE_CATALOG"
key.data = &msgno;
key.size = sizeof(recno_t);
msgno = 1;
if (db->get(db, &key, &data, 0) != 0 ||
data.size != sizeof(VMC) - 1 ||
memcmp(data.data, VMC, sizeof(VMC) - 1)) {
(void)db->close(db);
if (first) {
first = 0;
return (1);
}
msgq_str(sp, M_ERR, p,
"030|The file %s is not a message catalog");
return (1);
}
first = 0;
if (sp->gp->msg != NULL)
(void)sp->gp->msg->close(sp->gp->msg);
sp->gp->msg = db;
return (0);
}
/*
* msg_close --
* Close the message catalogs.
*
* PUBLIC: void msg_close __P((GS *));
*/
void
msg_close(gp)
GS *gp;
{
if (gp->msg != NULL)
(void)gp->msg->close(gp->msg);
}
/*
* msg_cont --
* Return common continuation messages.
*
* PUBLIC: const char *msg_cmsg __P((SCR *, cmsg_t, size_t *));
*/
const char *
msg_cmsg(sp, which, lenp)
SCR *sp;
cmsg_t which;
size_t *lenp;
{
switch (which) {
case CMSG_CONF:
return (msg_cat(sp, "268|confirm? [ynq]", lenp));
case CMSG_CONT:
return (msg_cat(sp, "269|Press any key to continue: ", lenp));
case CMSG_CONT_EX:
return (msg_cat(sp,
"270|Press any key to continue [: to enter more ex commands]: ",
lenp));
case CMSG_CONT_R:
return (msg_cat(sp, "161|Press Enter to continue: ", lenp));
case CMSG_CONT_S:
return (msg_cat(sp, "275| cont?", lenp));
case CMSG_CONT_Q:
return (msg_cat(sp,
"271|Press any key to continue [q to quit]: ", lenp));
default:
abort();
}
/* NOTREACHED */
}
/*
* msg_cat --
* Return a single message from the catalog, plus its length.
*
* !!!
* Only a single catalog message can be accessed at a time, if multiple
* ones are needed, they must be copied into local memory.
*
* PUBLIC: const char *msg_cat __P((SCR *, const char *, size_t *));
*/
const char *
msg_cat(sp, str, lenp)
SCR *sp;
const char *str;
size_t *lenp;
{
GS *gp;
DBT data, key;
recno_t msgno;
/*
* If it's not a catalog message, i.e. has doesn't have a leading
* number and '|' symbol, we're done.
*/
if (isdigit(str[0]) &&
isdigit(str[1]) && isdigit(str[2]) && str[3] == '|') {
key.data = &msgno;
key.size = sizeof(recno_t);
msgno = atoi(str);
/*
* XXX
* Really sleazy hack -- we put an extra character on the
* end of the format string, and then we change it to be
* the nul termination of the string. There ought to be
* a better way. Once we can allocate multiple temporary
* memory buffers, maybe we can use one of them instead.
*/
gp = sp == NULL ? NULL : sp->gp;
if (gp != NULL && gp->msg != NULL &&
gp->msg->get(gp->msg, &key, &data, 0) == 0 &&
data.size != 0) {
if (lenp != NULL)
*lenp = data.size - 1;
((char *)data.data)[data.size - 1] = '\0';
return (data.data);
}
str = &str[4];
}
if (lenp != NULL)
*lenp = strlen(str);
return (str);
}
/*
* msg_print --
* Return a printable version of a string, in allocated memory.
*
* PUBLIC: char *msg_print __P((SCR *, const char *, int *));
*/
char *
msg_print(sp, s, needfree)
SCR *sp;
const char *s;
int *needfree;
{
size_t blen, nlen;
const char *cp;
char *bp, *ep, *p, *t;
*needfree = 0;
for (cp = s; *cp != '\0'; ++cp)
if (!isprint(*cp))
break;
if (*cp == '\0')
return ((char *)s); /* SAFE: needfree set to 0. */
nlen = 0;
if (0) {
retry: if (sp == NULL)
free(bp);
else
FREE_SPACE(sp, bp, blen);
needfree = 0;
}
nlen += 256;
if (sp == NULL) {
if ((bp = malloc(nlen)) == NULL)
goto alloc_err;
} else
GET_SPACE_GOTO(sp, bp, blen, nlen);
if (0) {
alloc_err: return ("");
}
*needfree = 1;
for (p = bp, ep = (bp + blen) - 1, cp = s; *cp != '\0' && p < ep; ++cp)
for (t = KEY_NAME(sp, *cp); *t != '\0' && p < ep; *p++ = *t++);
if (p == ep)
goto retry;
*p = '\0';
return (bp);
}