1/*
2 * "streamable kanji code filter and converter"
3 * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
4 *
5 * LICENSE NOTICES
6 *
7 * This file is part of "streamable kanji code filter and converter",
8 * which is distributed under the terms of GNU Lesser General Public
9 * License (version 2) as published by the Free Software Foundation.
10 *
11 * This software is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with "streamable kanji code filter and converter";
18 * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 * Suite 330, Boston, MA  02111-1307  USA
20 *
21 * The author of this file:
22 *
23 */
24/*
25 * The source code included in this files was separated from mbfilter.c
26 * by Moriyoshi Koizumi <moriyoshi@php.net> on 20 Dec 2002. The file
27 * mbfilter.c is included in this package .
28 *
29 */
30
31#ifdef HAVE_CONFIG_H
32#include "config.h"
33#endif
34
35#ifdef HAVE_STDDEF_H
36#include <stddef.h>
37#endif
38
39#include "mbfl_allocators.h"
40#include "mbfl_string.h"
41#include "mbfl_memory_device.h"
42
43/*
44 * memory device output functions
45 */
46void
47mbfl_memory_device_init(mbfl_memory_device *device, int initsz, int allocsz)
48{
49    if (device) {
50        device->length = 0;
51        device->buffer = (unsigned char *)0;
52        if (initsz > 0) {
53            device->buffer = (unsigned char *)mbfl_malloc(initsz*sizeof(unsigned char));
54            if (device->buffer != NULL) {
55                device->length = initsz;
56            }
57        }
58        device->pos= 0;
59        if (allocsz > MBFL_MEMORY_DEVICE_ALLOC_SIZE) {
60            device->allocsz = allocsz;
61        } else {
62            device->allocsz = MBFL_MEMORY_DEVICE_ALLOC_SIZE;
63        }
64    }
65}
66
67void
68mbfl_memory_device_realloc(mbfl_memory_device *device, int initsz, int allocsz)
69{
70    unsigned char *tmp;
71
72    if (device) {
73        if (initsz > device->length) {
74            tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, initsz*sizeof(unsigned char));
75            if (tmp != NULL) {
76                device->buffer = tmp;
77                device->length = initsz;
78            }
79        }
80        if (allocsz > MBFL_MEMORY_DEVICE_ALLOC_SIZE) {
81            device->allocsz = allocsz;
82        } else {
83            device->allocsz = MBFL_MEMORY_DEVICE_ALLOC_SIZE;
84        }
85    }
86}
87
88void
89mbfl_memory_device_clear(mbfl_memory_device *device)
90{
91    if (device) {
92        if (device->buffer) {
93            mbfl_free(device->buffer);
94        }
95        device->buffer = (unsigned char *)0;
96        device->length = 0;
97        device->pos = 0;
98    }
99}
100
101void
102mbfl_memory_device_reset(mbfl_memory_device *device)
103{
104    if (device) {
105        device->pos = 0;
106    }
107}
108
109void
110mbfl_memory_device_unput(mbfl_memory_device *device)
111{
112    if (device->pos > 0) {
113        device->pos--;
114    }
115}
116
117mbfl_string *
118mbfl_memory_device_result(mbfl_memory_device *device, mbfl_string *result)
119{
120    if (device && result) {
121        result->len = device->pos;
122        mbfl_memory_device_output4('\0', device);
123        result->val = device->buffer;
124        device->buffer = (unsigned char *)0;
125        device->length = 0;
126        device->pos= 0;
127        if (result->val == NULL) {
128            result->len = 0;
129            result = NULL;
130        }
131    } else {
132        result = NULL;
133    }
134
135    return result;
136}
137
138int
139mbfl_memory_device_output(int c, void *data)
140{
141    mbfl_memory_device *device = (mbfl_memory_device *)data;
142
143    if (device->pos >= device->length) {
144        /* reallocate buffer */
145        int newlen;
146        unsigned char *tmp;
147
148        newlen = device->length + device->allocsz;
149        tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, newlen*sizeof(unsigned char));
150        if (tmp == NULL) {
151            return -1;
152        }
153        device->length = newlen;
154        device->buffer = tmp;
155    }
156
157    device->buffer[device->pos++] = (unsigned char)c;
158    return c;
159}
160
161int
162mbfl_memory_device_output2(int c, void *data)
163{
164    mbfl_memory_device *device = (mbfl_memory_device *)data;
165
166    if ((device->pos + 2) >= device->length) {
167        /* reallocate buffer */
168        int newlen;
169        unsigned char *tmp;
170
171        newlen = device->length + device->allocsz;
172        tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, newlen*sizeof(unsigned char));
173        if (tmp == NULL) {
174            return -1;
175        }
176        device->length = newlen;
177        device->buffer = tmp;
178    }
179
180    device->buffer[device->pos++] = (unsigned char)((c >> 8) & 0xff);
181    device->buffer[device->pos++] = (unsigned char)(c & 0xff);
182
183    return c;
184}
185
186int
187mbfl_memory_device_output4(int c, void* data)
188{
189    mbfl_memory_device *device = (mbfl_memory_device *)data;
190
191    if ((device->pos + 4) >= device->length) {
192        /* reallocate buffer */
193        int newlen;
194        unsigned char *tmp;
195
196        newlen = device->length + device->allocsz;
197        tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, newlen*sizeof(unsigned char));
198        if (tmp == NULL) {
199            return -1;
200        }
201        device->length = newlen;
202        device->buffer = tmp;
203    }
204
205    device->buffer[device->pos++] = (unsigned char)((c >> 24) & 0xff);
206    device->buffer[device->pos++] = (unsigned char)((c >> 16) & 0xff);
207    device->buffer[device->pos++] = (unsigned char)((c >> 8) & 0xff);
208    device->buffer[device->pos++] = (unsigned char)(c & 0xff);
209
210    return c;
211}
212
213int
214mbfl_memory_device_strcat(mbfl_memory_device *device, const char *psrc)
215{
216    int len;
217    unsigned char *w;
218    const unsigned char *p;
219
220    len = 0;
221    p = psrc;
222    while (*p) {
223        p++;
224        len++;
225    }
226
227    if ((device->pos + len) >= device->length) {
228        /* reallocate buffer */
229        int newlen = device->length + (len + MBFL_MEMORY_DEVICE_ALLOC_SIZE)*sizeof(unsigned char);
230        unsigned char *tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, newlen*sizeof(unsigned char));
231        if (tmp == NULL) {
232            return -1;
233        }
234        device->length = newlen;
235        device->buffer = tmp;
236    }
237
238    p = psrc;
239    w = &device->buffer[device->pos];
240    device->pos += len;
241    while (len > 0) {
242        *w++ = *p++;
243        len--;
244    }
245
246    return len;
247}
248
249int
250mbfl_memory_device_strncat(mbfl_memory_device *device, const char *psrc, int len)
251{
252    unsigned char *w;
253
254    if ((device->pos + len) >= device->length) {
255        /* reallocate buffer */
256        int newlen = device->length + len + MBFL_MEMORY_DEVICE_ALLOC_SIZE;
257        unsigned char *tmp = (unsigned char *)mbfl_realloc((void *)device->buffer, newlen*sizeof(unsigned char));
258        if (tmp == NULL) {
259            return -1;
260        }
261        device->length = newlen;
262        device->buffer = tmp;
263    }
264
265    w = &device->buffer[device->pos];
266    device->pos += len;
267    while (len > 0) {
268        *w++ = *psrc++;
269        len--;
270    }
271
272    return len;
273}
274
275int
276mbfl_memory_device_devcat(mbfl_memory_device *dest, mbfl_memory_device *src)
277{
278    int n;
279    unsigned char *p, *w;
280
281    if ((dest->pos + src->pos) >= dest->length) {
282        /* reallocate buffer */
283        int newlen = dest->length + src->pos + MBFL_MEMORY_DEVICE_ALLOC_SIZE;
284        unsigned char *tmp = (unsigned char *)mbfl_realloc((void *)dest->buffer, newlen*sizeof(unsigned char));
285        if (tmp == NULL) {
286            return -1;
287        }
288        dest->length = newlen;
289        dest->buffer = tmp;
290    }
291
292    p = src->buffer;
293    w = &dest->buffer[dest->pos];
294    n = src->pos;
295    dest->pos += n;
296    while (n > 0) {
297        *w++ = *p++;
298        n--;
299    }
300
301    return n;
302}
303
304void
305mbfl_wchar_device_init(mbfl_wchar_device *device)
306{
307    if (device) {
308        device->buffer = (unsigned int *)0;
309        device->length = 0;
310        device->pos= 0;
311        device->allocsz = MBFL_MEMORY_DEVICE_ALLOC_SIZE;
312    }
313}
314
315void
316mbfl_wchar_device_clear(mbfl_wchar_device *device)
317{
318    if (device) {
319        if (device->buffer) {
320            mbfl_free(device->buffer);
321        }
322        device->buffer = (unsigned int*)0;
323        device->length = 0;
324        device->pos = 0;
325    }
326}
327
328int
329mbfl_wchar_device_output(int c, void *data)
330{
331    mbfl_wchar_device *device = (mbfl_wchar_device *)data;
332
333    if (device->pos >= device->length) {
334        /* reallocate buffer */
335        int newlen;
336        unsigned int *tmp;
337
338        newlen = device->length + device->allocsz;
339        tmp = (unsigned int *)mbfl_realloc((void *)device->buffer, newlen*sizeof(int));
340        if (tmp == NULL) {
341            return -1;
342        }
343        device->length = newlen;
344        device->buffer = tmp;
345    }
346
347    device->buffer[device->pos++] = c;
348
349    return c;
350}
351