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reapp.c
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C/C++ Source or Header
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1996-09-28
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14KB
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682 lines
/************************************************************************
* This program is Copyright (C) 1986-1996 by Jonathan Payne. JOVE is *
* provided to you without charge, and with no warranty. You may give *
* away copies of JOVE, including sources, provided that this notice is *
* included in all the files. *
************************************************************************/
/* regular expression applications: search, replace, and tags */
#include "jove.h"
#include "fp.h"
#include "re.h"
#include "jctype.h"
#include "chars.h"
#include "disp.h"
#include "ask.h"
#include "fmt.h"
#include "marks.h"
#include "reapp.h"
#include "wind.h"
#ifdef MAC
# include "mac.h"
#else
# include <sys/stat.h>
#endif
private void
IncSearch proto((int));
private int
isearch proto((int, Bufpos *));
private char
searchstr[128]; /* global search string */
bool
UseRE = NO; /* VAR: use regular expressions in search */
private void
setsearch(str)
char *str;
{
strcpy(searchstr, str);
}
private char *
getsearch()
{
return searchstr;
}
private void
search(dir, re, setdefault)
int dir;
bool re,
setdefault;
{
Bufpos *newdot;
char *s;
s = ask(searchstr, ProcFmt);
if (setdefault)
setsearch(s);
okay_wrap = YES;
newdot = dosearch(s, dir, re);
okay_wrap = NO;
if (newdot == NULL) {
if (WrapScan)
complain("No \"%s\" in buffer.", s);
else
complain("No \"%s\" found to %s.", s,
(dir == FORWARD) ? "bottom" : "top");
}
PushPntp(newdot->p_line);
SetDot(newdot);
}
void
ForSearch()
{
search(FORWARD, UseRE, YES);
}
void
RevSearch()
{
search(BACKWARD, UseRE, YES);
}
void
FSrchND()
{
search(FORWARD, UseRE, NO);
}
void
RSrchND()
{
search(BACKWARD, UseRE, NO);
}
private int
substitute(re_blk, query, l1, char1, l2, char2)
struct RE_block *re_blk;
LinePtr l1,
l2;
bool query;
int char1,
char2;
{
LinePtr lp;
int numdone = 0,
UNDO_nd = 0,
offset = char1;
bool stop = NO;
daddr UNDO_da = NULL_DADDR;
LinePtr UNDO_lp = NULL;
lsave();
for (lp = l1; lp != l2->l_next; lp = lp->l_next) {
int crater = -1; /* end of last substitution on this line */
bool LineDone = NO; /* already replaced last empty string on line? */
while (!LineDone
&& re_lindex(lp, offset, FORWARD, re_blk, NO, crater)
&& (lp != l2 || REeom <= char2))
{
DotTo(lp, REeom);
offset = curchar;
if (query) {
ZXchar c;
message("Replace (Type '?' for help)? ");
reswitch:
redisplay();
c = kbd_getch();
if (c == AbortChar)
return numdone;
switch (CharUpcase(c)) {
case '.':
stop = YES;
/*FALLTHROUGH*/
case ' ':
case 'Y':
break;
case BS:
case DEL:
case 'N':
if (REbom == REeom) {
offset += 1;
if (linebuf[REeom] == '\0')
LineDone = YES;
}
continue;
case CTL('W'):
re_dosub(re_blk, linebuf, YES);
if (lp == l2)
char2 += REdelta;
modify();
numdone += 1;
curchar = REbom;
makedirty(curline);
/*FALLTHROUGH*/
case CTL('R'):
case 'R':
RErecur();
UNDO_lp = NULL; /* can't reliably undo this */
offset = curchar;
lp = curline;
continue;
case CTL('U'):
case 'U':
if (UNDO_lp == NULL) {
rbell();
goto reswitch;
}
lp = UNDO_lp;
lp->l_dline = UNDO_da;
if (UNDO_lp == curline)
getDOT(); /* downdate line cache */
makedirty(lp);
offset = 0;
numdone = UNDO_nd;
UNDO_lp = NULL;
continue;
case 'P':
case '!':
query = NO;
break;
case CR:
case LF:
case 'Q':
return numdone;
case CTL('L'):
RedrawDisplay();
goto reswitch;
default:
rbell();
message("Space or Y, Period, Delete or N, ^R or R, ^W, ^U or U, P or !, Return.");
goto reswitch;
}
}
if (UNDO_lp != curline) {
UNDO_da = curline->l_dline;
UNDO_lp = curline;
UNDO_nd = numdone;
}
if (REbom == REeom && linebuf[REeom] == '\0')
LineDone = YES;
re_dosub(re_blk, linebuf, NO);
if (lp == l2)
char2 += REdelta;
numdone += 1;
modify();
crater = offset = curchar = REeom;
makedirty(curline);
if (query) {
message(mesgbuf); /* no blinking */
redisplay(); /* show the change */
}
if (stop)
return numdone;
}
offset = 0;
}
return numdone;
}
/* prompt for search and replacement strings and do the substitution */
private void
replace(query, inreg)
bool query,
inreg;
{
Mark *m;
char *rep_ptr;
LinePtr l1 = curline,
l2 = curbuf->b_last;
int char1 = curchar,
char2 = length(curbuf->b_last),
numdone;
struct RE_block re_blk;
if (inreg) {
m = CurMark();
l2 = m->m_line;
char2 = m->m_char;
(void) fixorder(&l1, &char1, &l2, &char2);
}
/* get search string */
strcpy(rep_search, ask(rep_search[0] ? rep_search : (char *)NULL, ProcFmt));
REcompile(rep_search, UseRE, &re_blk);
/* Now the replacement string. Do_ask() so the user can play with
the default (previous) replacement string by typing ^R in ask(),
OR, he can just hit Return to replace with nothing. */
rep_ptr = do_ask("\r\n", NULL_ASK_EXT, rep_str, ": %f %s with ",
rep_search);
if (rep_ptr == NULL)
rep_ptr = NullStr;
strcpy(rep_str, rep_ptr);
if ((numdone = substitute(&re_blk, query, l1, char1, l2, char2)) != 0
&& !inreg)
{
do_set_mark(l1, char1);
add_mess(" "); /* just making things pretty */
} else {
message(NullStr);
}
add_mess("(%d substitution%n)", numdone, numdone);
}
void
RegReplace()
{
replace(NO, YES);
}
void
QRepSearch()
{
replace(YES, NO);
}
void
RepSearch()
{
replace(NO, NO);
}
/* Lookup a tag in tag file FILE. FILE is assumed to be sorted
alphabetically. The FASTTAGS code, which is implemented with
a binary search, depends on this assumption. If it's not true
it is possible to comment out the fast tag code (which is clearly
labeled), delete the marked test in the sequential loop, and
everything else will just work. */
private bool
lookup_tag(searchbuf, sbsize, filebuf, tag, file)
char *searchbuf;
size_t sbsize;
char *filebuf,
*tag,
*file;
{
register size_t taglen = strlen(tag);
char line[JBUFSIZ],
pattern[128];
register File *fp;
struct stat stbuf;
bool success = NO;
fp = open_file(file, iobuff, F_READ, NO);
if (fp == NULL) {
message(IOerr("open", file));
return NO;
}
swritef(pattern, sizeof(pattern), "^%s[^\t]*\t*\\([^\t]*\\)\t*\\([?/]\\)\\(.*\\)\\2$", tag);
/* ********BEGIN FAST TAG CODE******** */
/* Mac doesn't have fstat */
#ifdef MAC
if (stat(file, &stbuf) >= 0)
#else
if (fstat(fp->f_fd, &stbuf) >= 0)
#endif
{
/* Invariant: if there is a line matching the tag, it
* begins somewhere after position lower, and begins
* at or before upper. There is one possible
* exception: if lower is 0, the line with the tag
* might be the very first line.
*
* When this loop is done, we seek to lower, advance
* past the next newline (unless lower is 0), and fall
* into the sequential search.
*/
register off_t lower = 0;
register off_t upper = stbuf.st_size;
for (;;) {
off_t mid;
int chars_eq;
if (upper - lower < JBUFSIZ)
break; /* small range: search sequentially */
mid = (lower + upper) / 2;
f_seek(fp, mid); /* mid will not be 0 */
f_toNL(fp);
if (f_gets(fp, line, sizeof line))
break; /* unexpected: bail out */
chars_eq = numcomp(line, tag);
if (chars_eq == taglen && jiswhite(line[chars_eq])) {
/* we hit the exact line: get out */
lower = mid;
break;
}
if (line[chars_eq] < tag[chars_eq])
lower = mid; /* line is BEFORE tag */
else
upper = mid; /* line is AFTER tag */
}
/* sequentially search from lower */
f_seek(fp, lower);
if (lower > 0)
f_toNL(fp);
}
/* END FAST TAG CODE */
while (!f_gets(fp, line, sizeof line)) {
int cmp = line[0] - *tag;
if (cmp == 0) {
cmp = strncmp(line, tag, taglen);
if (cmp == 0) {
/* we've found the match */
if (!LookingAt(pattern, line, 0)) {
complain("I thought I saw it!");
} else {
putmatch(1, filebuf, (size_t)FILESIZE);
putmatch(3, searchbuf, sbsize-1);
success = YES;
}
break;
}
}
if (cmp > 0)
break; /* failure: gone too far. PRESUMES ALPHABETIC ORDER */
}
close_file(fp);
if (!success)
s_mess("Can't find tag \"%s\".", tag);
return success;
}
char TagFile[FILESIZE] = "tags"; /* VAR: default tag file */
void
find_tag(tag, localp)
char *tag;
bool localp;
{
char filebuf[FILESIZE],
sstr[100],
tfbuf[FILESIZE];
register Bufpos *bp;
register Buffer *b;
if (lookup_tag(sstr, sizeof(sstr), filebuf, tag,
localp? TagFile : ask_file("With tag file ", TagFile, tfbuf)))
{
set_mark();
b = do_find(curwind, filebuf, YES, NO);
if (curbuf != b)
SetABuf(curbuf);
SetBuf(b);
if ((bp = dosearch(sstr, BACKWARD, NO)) == NULL
&& (bp = dosearch(sstr, FORWARD, NO)) == NULL)
message("Well, I found the file, but the tag is missing.");
else
SetDot(bp);
}
}
void
FindTag()
{
bool localp = !is_an_arg();
char tag[128];
strcpy(tag, ask((char *)NULL, ProcFmt));
find_tag(tag, localp);
}
/* Find Tag at Dot. */
void
FDotTag()
{
int c1 = curchar,
c2 = c1;
char tagname[50];
if (!jisident(linebuf[curchar]))
complain("Not a tag!");
while (c1 > 0 && jisident(linebuf[c1 - 1]))
c1 -= 1;
while (jisident(linebuf[c2]))
c2 += 1;
if ((c2 - c1) >= (int)sizeof(tagname))
complain("tag too long");
null_ncpy(tagname, linebuf + c1, (size_t) (c2 - c1));
find_tag(tagname, !is_an_arg());
}
/* I-search returns a code saying what to do:
I_STOP: We found the match, so unwind the stack and leave
where it is.
I_DELETE: Rubout the last command.
I_BACKUP: Back up to where the isearch was last NOT failing.
I_TOSTART: Abort the search, going back where isearch started
When a character is typed it is appended to the search string, and
then, isearch is called recursively. When ^S or ^R is typed, isearch
is again called recursively. */
#define I_STOP 1
#define I_DELETE 2
#define I_BACKUP 3
#define I_TOSTART 4
private char
ISbuf[128],
*incp = NULL;
ZXchar SExitChar = CR; /* VAR: type this to stop i-search */
private Bufpos *
doisearch(dir, c, failing)
register ZXchar c;
register int dir;
bool failing;
{
static Bufpos buf;
Bufpos *bp;
if (c != CTL('S') && c != CTL('R')) {
if (failing)
return NULL;
DOTsave(&buf);
if (dir == FORWARD) {
if (ZXC(linebuf[curchar]) == c
|| (CaseIgnore && cind_eq(linebuf[curchar], c))) {
buf.p_char = curchar + 1;
return &buf;
}
} else {
if (look_at(ISbuf))
return &buf;
}
}
okay_wrap = YES;
if ((bp = dosearch(ISbuf, dir, NO)) == NULL)
rbell(); /* ring the first time there's no match */
okay_wrap = NO;
return bp;
}
void
IncFSearch()
{
IncSearch(FORWARD);
}
void
IncRSearch()
{
IncSearch(BACKWARD);
}
private void
IncSearch(dir)
int dir;
{
Bufpos save_env;
DOTsave(&save_env);
ISbuf[0] = '\0';
incp = ISbuf;
if (isearch(dir, &save_env) == I_TOSTART)
SetDot(&save_env);
else {
if (LineDist(curline, save_env.p_line) >= MarkThresh)
do_set_mark(save_env.p_line, save_env.p_char);
}
setsearch(ISbuf);
}
/* Nicely recursive. */
private int
isearch(dir, bp)
int dir;
Bufpos *bp;
{
Bufpos pushbp;
ZXchar c;
int ndir;
bool failing;
char *orig_incp;
if (bp != NULL) { /* Move to the new position. */
pushbp.p_line = bp->p_line;
pushbp.p_char = bp->p_char;
SetDot(bp);
failing = NO;
} else {
DOTsave(&pushbp);
failing = YES;
}
orig_incp = incp;
ndir = dir; /* Same direction as when we got here, unless
we change it with ^S or ^R. */
for (;;) {
SetDot(&pushbp);
message(NullStr);
if (failing)
add_mess("Failing ");
if (dir == BACKWARD)
add_mess("reverse-");
add_mess("I-search: %s", ISbuf);
DrawMesg(NO);
add_mess(NullStr); /* tell me this is disgusting ... */
c = getch();
if (c == SExitChar)
return I_STOP;
if (c == AbortChar) {
/* If we're failing, we backup until we're no longer
failing or we've reached the beginning; else, we
just abort the search and go back to the start. */
if (failing)
return I_BACKUP;
return I_TOSTART;
}
switch (c) {
case DEL:
case BS:
return I_DELETE;
case CTL('\\'):
c = CTL('S');
/*FALLTHROUGH*/
case CTL('S'):
case CTL('R'):
/* If this is the first time through and we have a
search string left over from last time, and Inputp
is not in use [kludge!], use that one now. */
if (Inputp == NULL && incp == ISbuf) {
Inputp = getsearch();
continue;
}
ndir = (c == CTL('S')) ? FORWARD : BACKWARD;
/* If we're failing and we're not changing our
direction, don't recur since there's no way
the search can work. */
if (failing && ndir == dir) {
rbell();
continue;
}
break;
case '\\':
if (incp > &ISbuf[(sizeof ISbuf) - 1]) {
rbell();
continue;
}
*incp++ = '\\';
add_mess("\\");
/*FALLTHROUGH*/
case CTL('Q'):
case CTL('^'):
add_mess(NullStr);
c = getch();
goto literal;
default:
/* check for "funny" characters */
if (!jisprint(c) || IsPrefixChar(c)) {
Ungetc(c);
return I_STOP;
}
/*FALLTHROUGH*/
case '\t':
literal:
if (incp > &ISbuf[(sizeof ISbuf) - 1]) {
rbell();
continue;
}
*incp++ = c;
*incp = '\0';
break;
}
add_mess("%s", orig_incp);
add_mess(" ..."); /* so we know what's going on */
DrawMesg(NO); /* do it now */
switch (isearch(ndir, doisearch(ndir, c, failing))) {
case I_TOSTART:
return I_TOSTART;
case I_STOP:
return I_STOP;
case I_BACKUP:
/* If we're not failing, we just continue to to the
for loop; otherwise we keep returning to the
previous levels until we find one that isn't
failing OR we reach the beginning. */
if (failing)
return I_BACKUP;
/*FALLTHROUGH*/
case I_DELETE:
incp = orig_incp;
*incp = '\0';
continue;
}
}
}