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annotate lwlib/lw_strbuf.c @ 500:733fd05ca2a8
Initialize temporary line structures properly
Apparently, not initializing all elements of a struct can lead to random
problems if something somewhere decides it should reference one of those
uninitialized fields. Who knew. Set the temporary line_t structure to zeroes
before passing it into anything when calculating the stuff for "object"
output which should at least make things predictable.
This seems to fix a crash reported by "strick" in Discord.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Thu, 29 Aug 2019 17:00:17 -0600 |
| parents | 670ea8f90212 |
| children |
| rev | line source |
|---|---|
| 295 | 1 /* |
|
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
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2 lwlib/lw_strbuf.c |
| 295 | 3 |
| 4 Copyright © 2013 William Astle | |
| 5 | |
| 6 This file is part of LWTOOLS. | |
| 7 | |
| 8 LWTOOLS is free software: you can redistribute it and/or modify it under the | |
| 9 terms of the GNU General Public License as published by the Free Software | |
| 10 Foundation, either version 3 of the License, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 16 more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License along with | |
| 19 this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 */ | |
| 21 | |
| 22 #include <stdlib.h> | |
| 23 | |
|
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670ea8f90212
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William Astle <lost@l-w.ca>
parents:
295
diff
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24 #include "lw_alloc.h" |
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
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25 #include "lw_strbuf.h" |
| 295 | 26 |
|
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
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changeset
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27 struct lw_strbuf *lw_strbuf_new(void) |
| 295 | 28 { |
|
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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29 struct lw_strbuf *lw_strbuf; |
| 295 | 30 |
|
308
670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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31 lw_strbuf = lw_alloc(sizeof(struct lw_strbuf)); |
|
670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
|
32 lw_strbuf -> str = NULL; |
|
670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
|
33 lw_strbuf -> bo = 0; |
|
670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
|
34 lw_strbuf -> bl = 0; |
|
670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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35 return lw_strbuf; |
| 295 | 36 } |
| 37 | |
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Converted preproc logic to library and moved some utility stuff to lwlib
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parents:
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38 void lw_strbuf_add(struct lw_strbuf *lw_strbuf, int c) |
| 295 | 39 { |
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40 if (lw_strbuf -> bo >= lw_strbuf -> bl) |
| 295 | 41 { |
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parents:
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42 lw_strbuf -> bl += 100; |
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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43 lw_strbuf -> str = lw_realloc(lw_strbuf -> str, lw_strbuf -> bl); |
| 295 | 44 } |
|
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Converted preproc logic to library and moved some utility stuff to lwlib
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parents:
295
diff
changeset
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45 lw_strbuf -> str[lw_strbuf -> bo++] = c; |
| 295 | 46 } |
| 47 | |
|
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parents:
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48 char *lw_strbuf_end(struct lw_strbuf *lw_strbuf) |
| 295 | 49 { |
| 50 char *rv; | |
| 51 | |
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670ea8f90212
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parents:
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changeset
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52 lw_strbuf_add(lw_strbuf, 0); |
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
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parents:
295
diff
changeset
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53 rv = lw_strbuf -> str; |
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670ea8f90212
Converted preproc logic to library and moved some utility stuff to lwlib
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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54 lw_free(lw_strbuf); |
| 295 | 55 return rv; |
| 56 } |