12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /* pngerror.c - stub functions for i/o and memory allocation
26 *
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file and, per its terms, should not be removed:
31 *
32 * Last changed in libpng 1.6.26 [October 20, 2016]
33 * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
34 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
35 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
36 *
37 * This code is released under the libpng license.
38 * For conditions of distribution and use, see the disclaimer
39 * and license in png.h
40 *
41 * This file provides a location for all error handling. Users who
42 * need special error handling are expected to write replacement functions
43 * and use png_set_error_fn() to use those functions. See the instructions
44 * at each function.
45 */
46
47 #include "pngpriv.h"
48
49 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
50
51 static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr,
52 png_const_charp error_message)),PNG_NORETURN);
53
174 {
175
176 static const char digits[] = "0123456789ABCDEF";
177
178 switch (format)
179 {
180 case PNG_NUMBER_FORMAT_fixed:
181 /* Needs five digits (the fraction) */
182 mincount = 5;
183 if (output != 0 || number % 10 != 0)
184 {
185 *--end = digits[number % 10];
186 output = 1;
187 }
188 number /= 10;
189 break;
190
191 case PNG_NUMBER_FORMAT_02u:
192 /* Expects at least 2 digits. */
193 mincount = 2;
194 /* FALL THROUGH */
195
196 case PNG_NUMBER_FORMAT_u:
197 *--end = digits[number % 10];
198 number /= 10;
199 break;
200
201 case PNG_NUMBER_FORMAT_02x:
202 /* This format expects at least two digits */
203 mincount = 2;
204 /* FALL THROUGH */
205
206 case PNG_NUMBER_FORMAT_x:
207 *--end = digits[number & 0xf];
208 number >>= 4;
209 break;
210
211 default: /* an error */
212 number = 0;
213 break;
214 }
215
216 /* Keep track of the number of digits added */
217 ++count;
218
219 /* Float a fixed number here: */
220 if ((format == PNG_NUMBER_FORMAT_fixed) && (count == 5) && (end > start))
221 {
222 /* End of the fraction, but maybe nothing was output? In that case
223 * drop the decimal point. If the number is a true zero handle that
224 * here.
|
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /* pngerror.c - stub functions for i/o and memory allocation
26 *
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file and, per its terms, should not be removed:
31 *
32 * Last changed in libpng 1.6.31 [July 27, 2017]
33 * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
34 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
35 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
36 *
37 * This code is released under the libpng license.
38 * For conditions of distribution and use, see the disclaimer
39 * and license in png.h
40 *
41 * This file provides a location for all error handling. Users who
42 * need special error handling are expected to write replacement functions
43 * and use png_set_error_fn() to use those functions. See the instructions
44 * at each function.
45 */
46
47 #include "pngpriv.h"
48
49 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
50
51 static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr,
52 png_const_charp error_message)),PNG_NORETURN);
53
174 {
175
176 static const char digits[] = "0123456789ABCDEF";
177
178 switch (format)
179 {
180 case PNG_NUMBER_FORMAT_fixed:
181 /* Needs five digits (the fraction) */
182 mincount = 5;
183 if (output != 0 || number % 10 != 0)
184 {
185 *--end = digits[number % 10];
186 output = 1;
187 }
188 number /= 10;
189 break;
190
191 case PNG_NUMBER_FORMAT_02u:
192 /* Expects at least 2 digits. */
193 mincount = 2;
194 /* FALLTHROUGH */
195
196 case PNG_NUMBER_FORMAT_u:
197 *--end = digits[number % 10];
198 number /= 10;
199 break;
200
201 case PNG_NUMBER_FORMAT_02x:
202 /* This format expects at least two digits */
203 mincount = 2;
204 /* FALLTHROUGH */
205
206 case PNG_NUMBER_FORMAT_x:
207 *--end = digits[number & 0xf];
208 number >>= 4;
209 break;
210
211 default: /* an error */
212 number = 0;
213 break;
214 }
215
216 /* Keep track of the number of digits added */
217 ++count;
218
219 /* Float a fixed number here: */
220 if ((format == PNG_NUMBER_FORMAT_fixed) && (count == 5) && (end > start))
221 {
222 /* End of the fraction, but maybe nothing was output? In that case
223 * drop the decimal point. If the number is a true zero handle that
224 * here.
|