20 static const char *ego
= "<unset>";
22 static const char *bkp
= 0;
24 static unsigned flags
= 0;
25 #define F_MIDLINETABS 1u
29 #define F_UNTABIFY 16u
33 static void usage(FILE *fp
)
34 { fprintf(fp
, "Usage: %s [-cmtuv] [-i[BKP]] [FILE...]\n\n", ego
); }
36 static char *augment(const char *name
, const char *suffix
)
38 size_t n
= strlen(name
), nn
= strlen(suffix
);
39 char *p
= malloc(n
+ nn
+ 1);
42 fprintf(stderr
, "%s: Out of memory!\n", ego
);
46 memcpy(p
+ n
, suffix
, nn
+ 1);
50 static FILE *freshname(const char *name
, char **newname
, mode_t mode
)
58 for (i
= 0; i
< 32767; i
++) {
59 sprintf(buf
, ".new%d", i
);
60 if ((n
= augment(name
, buf
)) == 0)
62 if ((fd
= open(n
, O_WRONLY
| O_CREAT
| O_EXCL
, mode
)) < 0) {
63 if (errno
== EEXIST
) {
67 fprintf(stderr
, "%s: Can't create new file for `%s': %s\n",
68 ego
, name
, strerror(errno
));
73 fprintf(stderr
, "%s: Can't find new file to update `%s'\n", ego
, name
);
78 fprintf(stderr
, "%s: Can't set permissions on `%s': %s\n",
79 ego
, n
, strerror(errno
));
82 if ((fp
= fdopen(fd
, "w")) == 0) {
83 fprintf(stderr
, "%s: fdopen on `%s' failed: %s\n",
84 ego
, n
, strerror(errno
));
103 #define BUF_INIT { 0, 0, 0 }
105 static void reset(buf
*b
) { b
->n
= 0; }
107 static int put(buf
*b
, int ch
)
117 b
->b
= realloc(b
->b
, w
);
120 fprintf(stderr
, "%s: Not enough memory for buffer!\n", ego
);
129 #define TABSTOP(n) (((n) + 8u) & ~7u)
131 static int space(const char *name
)
133 static buf b
= BUF_INIT
;
134 FILE *fin
, *fout
= stdout
;
135 char *newname
= 0, *oldname
= 0;
136 int rc
= TROUBLE
, status
= OK
;
138 unsigned nsp
= 0, nwsp
= 0, hpos
= 0, ohpos
= 0, nhpos
= 0, nl
= 1;
141 #define f_warnspacetab 2u
143 #define f_warntabs 8u
144 #define f_warnspaces 16u
147 #define f_forced 128u
148 unsigned f
= f_newline
| (flags
& F_TABIFY ? f_tabify
: 0);
151 if (strcmp(name
, "-") == 0) {
152 if (flags
& F_INPLACE
) {
153 fprintf(stderr
, "%s: Can't modify stdin in-place.\n", ego
);
158 if ((fin
= fopen(name
, "r")) == 0) {
159 fprintf(stderr
, "%s: Failed to open file `%s': %s.\n",
160 ego
, name
, strerror(errno
));
163 else if (flags
& F_INPLACE
) {
165 if (stat(name
, &st
)) {
166 fprintf(stderr
, "%s: Can't stat `%s': %s.\n",
167 ego
, name
, strerror(errno
));
170 if ((fout
= freshname(name
, &newname
, st
.st_mode
)) == 0)
181 nsp
++; nwsp
++; hpos
++;
182 if (put(&b
, ' ')) goto done_2
;
185 if (flags
& F_UNTABIFY
) {
186 if ((flags
& F_VERBOSE
) && !(f
& f_warntabs
)) {
187 fprintf(stderr
, "%s:%u: found tab\n", name
, nl
);
191 } else if (((flags
& F_MIDLINETABS
) || (f
& f_newline
)) && nsp
) {
192 if ((flags
& F_VERBOSE
) && !(f
& f_warnspacetab
)) {
193 fprintf(stderr
, "%s:%u: space followed by tab\n", name
, nl
);
197 f
|= f_tabify
| f_forced
;
200 nsp
= 0; nwsp
++; hpos
= TABSTOP(hpos
);
201 if (put(&b
, '\t')) goto done_2
;
204 if (nwsp
|| !(f
& f_newline
)) {
205 if (flags
& F_VERBOSE
)
206 fprintf(stderr
, "%s:%u: file ends in mid-line\n", name
, nl
);
208 if (fout
) putc('\n', fout
);
214 if (flags
& F_VERBOSE
)
215 fprintf(stderr
, "%s:%u: trailing whitespace\n", name
, nl
);
218 if (fout
) putc('\n', fout
);
220 nsp
= nwsp
= hpos
= ohpos
= 0; nl
++;
222 f
&= ~(f_tab
| f_warnspacetab
| f_warntabs
| f_warnspaces
);
223 if (flags
& F_TABIFY
)
231 if (flags
& F_UNTABIFY
) {
232 if (fout
) for (; ohpos
< hpos
; ohpos
++) putc(' ', fout
);
233 } else if ((f
& f_tabify
) &&
234 ((hpos
- ohpos
>= (last
== '.' || last
== ':' ?
236 (f
& (f_tab
| f_newline
)))) {
239 nhpos
= TABSTOP(ohpos
);
240 if (nhpos
> hpos
) break;
241 if (fout
) putc('\t', fout
);
242 if ((flags
& F_VERBOSE
) && (flags
& F_TABIFY
) &&
243 i
< b
.n
&& b
.b
[i
] != '\t' &&
244 !(f
& (f_warnspaces
| f_forced
))) {
245 fprintf(stderr
, "%s:%u: spaces could be turned into tabs\n",
253 for (; ohpos
< hpos
; ohpos
++) putc(' ', fout
);
255 for (i
= 0; i
< b
.n
; i
++) putc(b
.b
[i
], fout
);
258 f
&= ~(f_newline
| f_tab
| f_forced
);
259 if (!(flags
& F_TABIFY
) || !(flags
& F_MIDLINETABS
)) f
&= ~f_tabify
;
261 hpos
++; ohpos
= hpos
;
262 if (fout
) putc(ch
, fout
);
263 if (ch
!= '"' && ch
!= '\'')
271 fprintf(stderr
, "%s: Error reading `%s': %s\n",
272 ego
, name
, strerror(errno
));
277 if (fflush(fout
) || ferror(fout
)) f
|= f_bad
;
278 if (fout
!= stdout
&& fclose(fout
)) f
|= f_bad
;
281 fprintf(stderr
, "%s: Error writing `%s': %s\n",
282 ego
, newname
, strerror(errno
));
287 if (flags
& F_INPLACE
) {
289 if ((oldname
= augment(name
, bkp
)) == 0)
291 if (rename(name
, oldname
)) {
292 fprintf(stderr
, "%s: Failed to back up `%s' as `%s': %s\n",
293 ego
, name
, oldname
, strerror(errno
));
297 if (rename(newname
, name
)) {
298 if (oldname
) rename(oldname
, name
);
299 fprintf(stderr
, "%s: Failed to install `%s' as `%s': %s\n",
300 ego
, newname
, name
, strerror(errno
));
308 if (oldname
) free(oldname
);
314 if (fout
&& fout
!= stdout
) fclose(fout
);
320 static int manysetp(unsigned f
) { return (!!(f
& (f
- 1))); }
322 int main(int argc
, char *argv
[])
327 if ((ego
= strrchr(argv
[0], '/')) == 0)
333 if ((i
= getopt(argc
, argv
, "h" "cmtuv" "i::")) < 0)
337 printf("%s -- remove extraneous spaces from files\n\n", ego
);
340 -h Print this help text\n\
341 -c Check files for badness, but don't produce other output\n\
342 -m Fix spaces followed by tabs in mid-line\n\
343 -t Tabify file completely\n\
344 -u Untabify file completely\n\
345 -i[BKP] Modify files in place; leave FILEBKP as copy of old FILE\n\
353 flags
|= F_MIDLINETABS
;
372 if (flags
& F_BOGUS
) {
376 if (manysetp(flags
& (F_CHECK
| F_INPLACE
))) {
377 fprintf(stderr
, "%s: Options -c and -i are mutually exclusive.\n", ego
);
380 if (manysetp(flags
& (F_TABIFY
| F_UNTABIFY
))) {
381 fprintf(stderr
, "%s: Options -t and -u are mutually exclusive.\n", ego
);
385 if (optind
== argc
) {
387 fprintf(stderr
, "%s: No options given and stdin is a terminal.\n",
392 } else for (i
= optind
; i
< argc
; i
++) {
394 if (st
> rc
) rc
= st
;
396 if (rc
== BADNESS
&& !(flags
& F_CHECK
))