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| 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 |
| 3 * found in the LICENSE file. |
| 4 * |
| 5 * Stub implementations of utility functions which call their linux-specific |
| 6 * equivalents. |
| 7 */ |
| 8 |
| 9 #include "stateful_util.h" |
| 10 |
| 11 #include <stdarg.h> |
| 12 #include <stdio.h> |
| 13 #include <stdlib.h> |
| 14 |
| 15 void* StatefulMemcpy(MemcpyState* state, void* dst, |
| 16 uint64_t len) { |
| 17 if (state->overrun) |
| 18 return NULL; |
| 19 if (len > state->remaining_len) { |
| 20 state->overrun = 1; |
| 21 return NULL; |
| 22 } |
| 23 Memcpy(dst, state->remaining_buf, len); |
| 24 state->remaining_buf += len; |
| 25 state->remaining_len -= len; |
| 26 return dst; |
| 27 } |
| 28 |
| 29 const void* StatefulMemcpy_r(MemcpyState* state, const void* src, |
| 30 uint64_t len) { |
| 31 if (state->overrun) |
| 32 return NULL; |
| 33 if (len > state->remaining_len) { |
| 34 state->overrun = 1; |
| 35 return NULL; |
| 36 } |
| 37 Memcpy(state->remaining_buf, src, len); |
| 38 state->remaining_buf += len; |
| 39 state->remaining_len -= len; |
| 40 return src; |
| 41 } |
| 42 |
| 43 const void* StatefulMemset_r(MemcpyState* state, const uint8_t val, |
| 44 uint64_t len) { |
| 45 if (state->overrun) |
| 46 return NULL; |
| 47 if (len > state->remaining_len) { |
| 48 state->overrun = 1; |
| 49 return NULL; |
| 50 } |
| 51 Memset(state->remaining_buf, val, len); |
| 52 state->remaining_buf += len; |
| 53 state->remaining_len -= len; |
| 54 return state; // have to return something non-NULL |
| 55 } |
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