projects/linux·blob v3.5 · refs

321 lines · 5.8 KiB

1/*
2 * (C) Copyright David Gibson <[email protected]>, IBM Corporation. 2005.
3 *
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
18 * USA
19 */
20
21#include "dtc.h"
22
23void data_free(struct data d)
24{
25 struct marker *m, *nm;
26
27 m = d.markers;
28 while (m) {
29 nm = m->next;
30 free(m->ref);
31 free(m);
32 m = nm;
33 }
34
35 if (d.val)
36 free(d.val);
37}
38
39struct data data_grow_for(struct data d, int xlen)
40{
41 struct data nd;
42 int newsize;
43
44 if (xlen == 0)
45 return d;
46
47 nd = d;
48
49 newsize = xlen;
50
51 while ((d.len + xlen) > newsize)
52 newsize *= 2;
53
54 nd.val = xrealloc(d.val, newsize);
55
56 return nd;
57}
58
59struct data data_copy_mem(const char *mem, int len)
60{
61 struct data d;
62
63 d = data_grow_for(empty_data, len);
64
65 d.len = len;
66 memcpy(d.val, mem, len);
67
68 return d;
69}
70
71static char get_oct_char(const char *s, int *i)
72{
73 char x[4];
74 char *endx;
75 long val;
76
77 x[3] = '\0';
78 strncpy(x, s + *i, 3);
79
80 val = strtol(x, &endx, 8);
81
82 assert(endx > x);
83
84 (*i) += endx - x;
85 return val;
86}
87
88static char get_hex_char(const char *s, int *i)
89{
90 char x[3];
91 char *endx;
92 long val;
93
94 x[2] = '\0';
95 strncpy(x, s + *i, 2);
96
97 val = strtol(x, &endx, 16);
98 if (!(endx > x))
99 die("\\x used with no following hex digits\n");
100
101 (*i) += endx - x;
102 return val;
103}
104
105struct data data_copy_escape_string(const char *s, int len)
106{
107 int i = 0;
108 struct data d;
109 char *q;
110
111 d = data_grow_for(empty_data, strlen(s)+1);
112
113 q = d.val;
114 while (i < len) {
115 char c = s[i++];
116
117 if (c != '\\') {
118 q[d.len++] = c;
119 continue;
120 }
121
122 c = s[i++];
123 assert(c);
124 switch (c) {
125 case 'a':
126 q[d.len++] = '\a';
127 break;
128 case 'b':
129 q[d.len++] = '\b';
130 break;
131 case 't':
132 q[d.len++] = '\t';
133 break;
134 case 'n':
135 q[d.len++] = '\n';
136 break;
137 case 'v':
138 q[d.len++] = '\v';
139 break;
140 case 'f':
141 q[d.len++] = '\f';
142 break;
143 case 'r':
144 q[d.len++] = '\r';
145 break;
146 case '0':
147 case '1':
148 case '2':
149 case '3':
150 case '4':
151 case '5':
152 case '6':
153 case '7':
154 i--; /* need to re-read the first digit as
155 * part of the octal value */
156 q[d.len++] = get_oct_char(s, &i);
157 break;
158 case 'x':
159 q[d.len++] = get_hex_char(s, &i);
160 break;
161 default:
162 q[d.len++] = c;
163 }
164 }
165
166 q[d.len++] = '\0';
167 return d;
168}
169
170struct data data_copy_file(FILE *f, size_t maxlen)
171{
172 struct data d = empty_data;
173
174 while (!feof(f) && (d.len < maxlen)) {
175 size_t chunksize, ret;
176
177 if (maxlen == -1)
178 chunksize = 4096;
179 else
180 chunksize = maxlen - d.len;
181
182 d = data_grow_for(d, chunksize);
183 ret = fread(d.val + d.len, 1, chunksize, f);
184
185 if (ferror(f))
186 die("Error reading file into data: %s", strerror(errno));
187
188 if (d.len + ret < d.len)
189 die("Overflow reading file into data\n");
190
191 d.len += ret;
192 }
193
194 return d;
195}
196
197struct data data_append_data(struct data d, const void *p, int len)
198{
199 d = data_grow_for(d, len);
200 memcpy(d.val + d.len, p, len);
201 d.len += len;
202 return d;
203}
204
205struct data data_insert_at_marker(struct data d, struct marker *m,
206 const void *p, int len)
207{
208 d = data_grow_for(d, len);
209 memmove(d.val + m->offset + len, d.val + m->offset, d.len - m->offset);
210 memcpy(d.val + m->offset, p, len);
211 d.len += len;
212
213 /* Adjust all markers after the one we're inserting at */
214 m = m->next;
215 for_each_marker(m)
216 m->offset += len;
217 return d;
218}
219
220static struct data data_append_markers(struct data d, struct marker *m)
221{
222 struct marker **mp = &d.markers;
223
224 /* Find the end of the markerlist */
225 while (*mp)
226 mp = &((*mp)->next);
227 *mp = m;
228 return d;
229}
230
231struct data data_merge(struct data d1, struct data d2)
232{
233 struct data d;
234 struct marker *m2 = d2.markers;
235
236 d = data_append_markers(data_append_data(d1, d2.val, d2.len), m2);
237
238 /* Adjust for the length of d1 */
239 for_each_marker(m2)
240 m2->offset += d1.len;
241
242 d2.markers = NULL; /* So data_free() doesn't clobber them */
243 data_free(d2);
244
245 return d;
246}
247
248struct data data_append_cell(struct data d, cell_t word)
249{
250 cell_t beword = cpu_to_fdt32(word);
251
252 return data_append_data(d, &beword, sizeof(beword));
253}
254
255struct data data_append_re(struct data d, const struct fdt_reserve_entry *re)
256{
257 struct fdt_reserve_entry bere;
258
259 bere.address = cpu_to_fdt64(re->address);
260 bere.size = cpu_to_fdt64(re->size);
261
262 return data_append_data(d, &bere, sizeof(bere));
263}
264
265struct data data_append_addr(struct data d, uint64_t addr)
266{
267 uint64_t beaddr = cpu_to_fdt64(addr);
268
269 return data_append_data(d, &beaddr, sizeof(beaddr));
270}
271
272struct data data_append_byte(struct data d, uint8_t byte)
273{
274 return data_append_data(d, &byte, 1);
275}
276
277struct data data_append_zeroes(struct data d, int len)
278{
279 d = data_grow_for(d, len);
280
281 memset(d.val + d.len, 0, len);
282 d.len += len;
283 return d;
284}
285
286struct data data_append_align(struct data d, int align)
287{
288 int newlen = ALIGN(d.len, align);
289 return data_append_zeroes(d, newlen - d.len);
290}
291
292struct data data_add_marker(struct data d, enum markertype type, char *ref)
293{
294 struct marker *m;
295
296 m = xmalloc(sizeof(*m));
297 m->offset = d.len;
298 m->type = type;
299 m->ref = ref;
300 m->next = NULL;
301
302 return data_append_markers(d, m);
303}
304
305int data_is_one_string(struct data d)
306{
307 int i;
308 int len = d.len;
309
310 if (len == 0)
311 return 0;
312
313 for (i = 0; i < len-1; i++)
314 if (d.val[i] == '\0')
315 return 0;
316
317 if (d.val[len-1] != '\0')
318 return 0;
319
320 return 1;
321}