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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. | 1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
2 * Use of this source code is governed by a BSD-style license that can be | 2 * Use of this source code is governed by a BSD-style license that can be |
3 * found in the LICENSE file. | 3 * found in the LICENSE file. |
4 * | 4 * |
5 * Stub implementations of utility functions which call their linux-specific | 5 * Stub implementations of utility functions which call their linux-specific |
6 * equivalents. | 6 * equivalents. |
7 */ | 7 */ |
8 | 8 |
9 #include "stateful_util.h" | 9 #include "stateful_util.h" |
10 | 10 |
11 #include <stdarg.h> | 11 #include <stdarg.h> |
12 #include <stdio.h> | 12 #include <stdio.h> |
13 #include <stdlib.h> | 13 #include <stdlib.h> |
14 | 14 |
| 15 void* StatefulSkip(MemcpyState* state, uint64_t len) { |
| 16 if (state->overrun) |
| 17 return NULL; |
| 18 if (len > state->remaining_len) { |
| 19 state->overrun = 1; |
| 20 return NULL; |
| 21 } |
| 22 state->remaining_buf += len; |
| 23 state->remaining_len -= len; |
| 24 return state; // have to return something non-NULL |
| 25 } |
| 26 |
15 void* StatefulMemcpy(MemcpyState* state, void* dst, | 27 void* StatefulMemcpy(MemcpyState* state, void* dst, |
16 uint64_t len) { | 28 uint64_t len) { |
17 if (state->overrun) | 29 if (state->overrun) |
18 return NULL; | 30 return NULL; |
19 if (len > state->remaining_len) { | 31 if (len > state->remaining_len) { |
20 state->overrun = 1; | 32 state->overrun = 1; |
21 return NULL; | 33 return NULL; |
22 } | 34 } |
23 Memcpy(dst, state->remaining_buf, len); | 35 Memcpy(dst, state->remaining_buf, len); |
24 state->remaining_buf += len; | 36 state->remaining_buf += len; |
(...skipping 21 matching lines...) Expand all Loading... |
46 return NULL; | 58 return NULL; |
47 if (len > state->remaining_len) { | 59 if (len > state->remaining_len) { |
48 state->overrun = 1; | 60 state->overrun = 1; |
49 return NULL; | 61 return NULL; |
50 } | 62 } |
51 Memset(state->remaining_buf, val, len); | 63 Memset(state->remaining_buf, val, len); |
52 state->remaining_buf += len; | 64 state->remaining_buf += len; |
53 state->remaining_len -= len; | 65 state->remaining_len -= len; |
54 return state; // have to return something non-NULL | 66 return state; // have to return something non-NULL |
55 } | 67 } |
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