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00022 #include <config.h>
00023 #include "exif-mnote-data-canon.h"
00024
00025 #include <stdlib.h>
00026 #include <stdio.h>
00027 #include <string.h>
00028
00029 #include <libexif/exif-byte-order.h>
00030 #include <libexif/exif-utils.h>
00031 #include <libexif/exif-data.h>
00032
00033 #define DEBUG
00034
00035 static void
00036 exif_mnote_data_canon_clear (ExifMnoteDataCanon *n)
00037 {
00038 ExifMnoteData *d = (ExifMnoteData *) n;
00039 unsigned int i;
00040
00041 if (!n) return;
00042
00043 if (n->entries) {
00044 for (i = 0; i < n->count; i++)
00045 if (n->entries[i].data) {
00046 exif_mem_free (d->mem, n->entries[i].data);
00047 n->entries[i].data = NULL;
00048 }
00049 exif_mem_free (d->mem, n->entries);
00050 n->entries = NULL;
00051 n->count = 0;
00052 }
00053 }
00054
00055 static void
00056 exif_mnote_data_canon_free (ExifMnoteData *n)
00057 {
00058 if (!n) return;
00059
00060 exif_mnote_data_canon_clear ((ExifMnoteDataCanon *) n);
00061 }
00062
00063 static void
00064 exif_mnote_data_canon_get_tags (ExifMnoteDataCanon *dc, unsigned int n,
00065 unsigned int *m, unsigned int *s)
00066 {
00067 unsigned int from = 0, to;
00068
00069 if (!dc || !m) return;
00070 for (*m = 0; *m < dc->count; (*m)++) {
00071 to = from + mnote_canon_entry_count_values (&dc->entries[*m]);
00072 if (to > n) {
00073 if (s) *s = n - from;
00074 break;
00075 }
00076 from = to;
00077 }
00078 }
00079
00080 static char *
00081 exif_mnote_data_canon_get_value (ExifMnoteData *note, unsigned int n, char *val, unsigned int maxlen)
00082 {
00083 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
00084 unsigned int m, s;
00085
00086 if (!dc) return NULL;
00087 exif_mnote_data_canon_get_tags (dc, n, &m, &s);
00088 if (m >= dc->count) return NULL;
00089 return mnote_canon_entry_get_value (&dc->entries[m], s, val, maxlen);
00090 }
00091
00092 static void
00093 exif_mnote_data_canon_set_byte_order (ExifMnoteData *d, ExifByteOrder o)
00094 {
00095 ExifByteOrder o_orig;
00096 ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) d;
00097 unsigned int i;
00098
00099 if (!n) return;
00100
00101 o_orig = n->order;
00102 n->order = o;
00103 for (i = 0; i < n->count; i++) {
00104 n->entries[i].order = o;
00105 exif_array_set_byte_order (n->entries[i].format, n->entries[i].data,
00106 n->entries[i].components, o_orig, o);
00107 }
00108 }
00109
00110 static void
00111 exif_mnote_data_canon_set_offset (ExifMnoteData *n, unsigned int o)
00112 {
00113 if (n) ((ExifMnoteDataCanon *) n)->offset = o;
00114 }
00115
00116 static void
00117 exif_mnote_data_canon_save (ExifMnoteData *ne,
00118 unsigned char **buf, unsigned int *buf_size)
00119 {
00120 ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) ne;
00121 unsigned int i, o, s, doff;
00122
00123 if (!n || !buf || !buf_size) return;
00124
00125
00126
00127
00128
00129 *buf_size = 2 + n->count * 12 + 4;
00130 *buf = exif_mem_alloc (ne->mem, sizeof (char) * *buf_size);
00131 if (!*buf) return;
00132
00133
00134 exif_set_short (*buf, n->order, (ExifShort) n->count);
00135
00136
00137 for (i = 0; i < n->count; i++) {
00138 o = 2 + i * 12;
00139 exif_set_short (*buf + o + 0, n->order, (ExifShort) n->entries[i].tag);
00140 exif_set_short (*buf + o + 2, n->order, (ExifShort) n->entries[i].format);
00141 exif_set_long (*buf + o + 4, n->order,
00142 n->entries[i].components);
00143 o += 8;
00144 s = exif_format_get_size (n->entries[i].format) *
00145 n->entries[i].components;
00146 if (s > 4) {
00147 *buf_size += s;
00148
00149
00150 if (s & 1) *buf_size += 1;
00151 *buf = exif_mem_realloc (ne->mem, *buf,
00152 sizeof (char) * *buf_size);
00153 if (!*buf) return;
00154 doff = *buf_size - s;
00155 if (s & 1) { doff--; *(*buf + *buf_size - 1) = '\0'; }
00156 exif_set_long (*buf + o, n->order, n->offset + doff);
00157 } else
00158 doff = o;
00159
00160
00161
00162
00163
00164 if (!n->entries[i].data) memset (*buf + doff, 0, s);
00165 else memcpy (*buf + doff, n->entries[i].data, s);
00166 if (s < 4) memset (*buf + doff + s, 0, (4 - s));
00167 }
00168 }
00169
00170
00171
00172
00173
00174
00175
00176
00177
00178
00179
00180
00181
00182 static void
00183 exif_mnote_data_canon_load (ExifMnoteData *ne,
00184 const unsigned char *buf, unsigned int buf_size)
00185 {
00186 ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) ne;
00187 ExifShort c;
00188 unsigned int i, o, s;
00189
00190 if (!n || !buf || !buf_size || (buf_size < 6 + n->offset + 2)) return;
00191
00192
00193 c = exif_get_short (buf + 6 + n->offset, n->order);
00194 exif_mnote_data_canon_clear (n);
00195
00196
00197 for (i = 0; i < c; i++) {
00198 o = 6 + 2 + n->offset + 12 * i;
00199 if (o + 8 > buf_size) return;
00200
00201 n->count = i + 1;
00202 n->entries = exif_mem_realloc (ne->mem, n->entries,
00203 sizeof (MnoteCanonEntry) * (i+1));
00204 memset (&n->entries[i], 0, sizeof (MnoteCanonEntry));
00205 n->entries[i].tag = exif_get_short (buf + o, n->order);
00206 n->entries[i].format = exif_get_short (buf + o + 2, n->order);
00207 n->entries[i].components = exif_get_long (buf + o + 4, n->order);
00208 n->entries[i].order = n->order;
00209
00210
00211
00212
00213
00214 s = exif_format_get_size (n->entries[i].format) * n->entries[i].components;
00215 if (!s) return;
00216 o += 8;
00217 if (s > 4) o = exif_get_long (buf + o, n->order) + 6;
00218 if (o + s > buf_size) return;
00219
00220
00221 n->entries[i].data = exif_mem_alloc (ne->mem, sizeof (char) * s);
00222 if (!n->entries[i].data) return;
00223 n->entries[i].size = s;
00224 memcpy (n->entries[i].data, buf + o, s);
00225 }
00226 }
00227
00228 static unsigned int
00229 exif_mnote_data_canon_count (ExifMnoteData *n)
00230 {
00231 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) n;
00232 unsigned int i, c;
00233
00234 for (i = c = 0; dc && (i < dc->count); i++)
00235 c += mnote_canon_entry_count_values (&dc->entries[i]);
00236 return c;
00237 }
00238
00239 static unsigned int
00240 exif_mnote_data_canon_get_id (ExifMnoteData *d, unsigned int i)
00241 {
00242 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) d;
00243 unsigned int m;
00244
00245 if (!dc) return 0;
00246 exif_mnote_data_canon_get_tags (dc, i, &m, NULL);
00247 if (m >= dc->count) return 0;
00248 return dc->entries[m].tag;
00249 }
00250
00251 static const char *
00252 exif_mnote_data_canon_get_name (ExifMnoteData *note, unsigned int i)
00253 {
00254 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
00255 unsigned int m, s;
00256
00257 if (!dc) return NULL;
00258 exif_mnote_data_canon_get_tags (dc, i, &m, &s);
00259 if (m >= dc->count) return NULL;
00260 return mnote_canon_tag_get_name_sub (dc->entries[m].tag, s);
00261 }
00262
00263 static const char *
00264 exif_mnote_data_canon_get_title (ExifMnoteData *note, unsigned int i)
00265 {
00266 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
00267 unsigned int m, s;
00268
00269 if (!dc) return NULL;
00270 exif_mnote_data_canon_get_tags (dc, i, &m, &s);
00271 if (m >= dc->count) return NULL;
00272 return mnote_canon_tag_get_title_sub (dc->entries[m].tag, s);
00273 }
00274
00275 static const char *
00276 exif_mnote_data_canon_get_description (ExifMnoteData *note, unsigned int i)
00277 {
00278 ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
00279 unsigned int m;
00280
00281 if (!dc) return NULL;
00282 exif_mnote_data_canon_get_tags (dc, i, &m, NULL);
00283 if (m >= dc->count) return NULL;
00284 return mnote_canon_tag_get_description (dc->entries[m].tag);
00285 }
00286
00287 ExifMnoteData *
00288 exif_mnote_data_canon_new (ExifMem *mem)
00289 {
00290 ExifMnoteData *d;
00291
00292 if (!mem) return NULL;
00293
00294 d = exif_mem_alloc (mem, sizeof (ExifMnoteDataCanon));
00295 if (!d) return NULL;
00296
00297 exif_mnote_data_construct (d, mem);
00298
00299
00300 d->methods.free = exif_mnote_data_canon_free;
00301 d->methods.set_byte_order = exif_mnote_data_canon_set_byte_order;
00302 d->methods.set_offset = exif_mnote_data_canon_set_offset;
00303 d->methods.load = exif_mnote_data_canon_load;
00304 d->methods.save = exif_mnote_data_canon_save;
00305 d->methods.count = exif_mnote_data_canon_count;
00306 d->methods.get_id = exif_mnote_data_canon_get_id;
00307 d->methods.get_name = exif_mnote_data_canon_get_name;
00308 d->methods.get_title = exif_mnote_data_canon_get_title;
00309 d->methods.get_description = exif_mnote_data_canon_get_description;
00310 d->methods.get_value = exif_mnote_data_canon_get_value;
00311
00312 return d;
00313 }