| 1 | /* |
| 2 | * Common Trace Format |
| 3 | * |
| 4 | * Integers read/write functions. |
| 5 | * |
| 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * Dual LGPL v2.1/GPL v2 license. |
| 9 | */ |
| 10 | |
| 11 | #include <ctf/ctf-types.h> |
| 12 | #include <stdint.h> |
| 13 | #include <glib.h> |
| 14 | #include <endian.h> |
| 15 | |
| 16 | uint64_t uint_read(const uint8_t *ptr, size_t len, int byte_order) |
| 17 | { |
| 18 | int rbo = (byte_order != BYTE_ORDER); /* reverse byte order */ |
| 19 | |
| 20 | switch (len) { |
| 21 | case 8: |
| 22 | { |
| 23 | uint8_t v; |
| 24 | |
| 25 | v = *(const uint8_t *)ptr; |
| 26 | return v; |
| 27 | } |
| 28 | case 16: |
| 29 | { |
| 30 | uint16_t v; |
| 31 | |
| 32 | v = *(const uint16_t *)ptr; |
| 33 | return rbo ? GUINT16_SWAP_LE_BE(v) : v; |
| 34 | } |
| 35 | case 32: |
| 36 | { |
| 37 | uint32_t v; |
| 38 | |
| 39 | v = *(const uint32_t *)ptr; |
| 40 | return rbo ? GUINT32_SWAP_LE_BE(v) : v; |
| 41 | } |
| 42 | case 64: |
| 43 | { |
| 44 | uint64_t v; |
| 45 | |
| 46 | v = *(const uint64_t *)ptr; |
| 47 | return rbo ? GUINT64_SWAP_LE_BE(v) : v; |
| 48 | } |
| 49 | default: |
| 50 | assert(0); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | int64_t int_read(const uint8_t *ptr, size_t len, int byte_order) |
| 55 | { |
| 56 | int rbo = (byte_order != BYTE_ORDER); /* reverse byte order */ |
| 57 | |
| 58 | switch (len) { |
| 59 | case 8: |
| 60 | { |
| 61 | int8_t v; |
| 62 | |
| 63 | v = *(const int8_t *)ptr; |
| 64 | return v; |
| 65 | } |
| 66 | case 16: |
| 67 | { |
| 68 | int16_t v; |
| 69 | |
| 70 | v = *(const int16_t *)ptr; |
| 71 | return rbo ? GUINT16_SWAP_LE_BE(v) : v; |
| 72 | } |
| 73 | case 32: |
| 74 | { |
| 75 | int32_t v; |
| 76 | |
| 77 | v = *(const int32_t *)ptr; |
| 78 | return rbo ? GUINT32_SWAP_LE_BE(v) : v; |
| 79 | } |
| 80 | case 64: |
| 81 | { |
| 82 | int64_t v; |
| 83 | |
| 84 | v = *(const int64_t *)ptr; |
| 85 | return rbo ? GUINT64_SWAP_LE_BE(v) : v; |
| 86 | } |
| 87 | default: |
| 88 | assert(0); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | size_t uint_write(uint8_t *ptr, size_t len, int byte_order, uint64_t v) |
| 93 | { |
| 94 | int rbo = (byte_order != BYTE_ORDER); /* reverse byte order */ |
| 95 | |
| 96 | if (!ptr) |
| 97 | goto end; |
| 98 | |
| 99 | switch (len) { |
| 100 | case 8: *(uint8_t *)ptr = (uint8_t) v; |
| 101 | break; |
| 102 | case 16: |
| 103 | *(uint16_t *)ptr = rbo ? GUINT16_SWAP_LE_BE((uint16_t) v) : |
| 104 | (uint16_t) v; |
| 105 | break; |
| 106 | case 32: |
| 107 | *(uint32_t *)ptr = rbo ? GUINT32_SWAP_LE_BE((uint32_t) v) : |
| 108 | (uint32_t) v; |
| 109 | break; |
| 110 | case 64: |
| 111 | *(uint64_t *)ptr = rbo ? GUINT64_SWAP_LE_BE(v) : v; |
| 112 | break; |
| 113 | default: |
| 114 | assert(0); |
| 115 | } |
| 116 | end: |
| 117 | return len; |
| 118 | } |
| 119 | |
| 120 | size_t int_write(uint8_t *ptr, size_t len, int byte_order, int64_t v) |
| 121 | { |
| 122 | int rbo = (byte_order != BYTE_ORDER); /* reverse byte order */ |
| 123 | |
| 124 | if (!ptr) |
| 125 | goto end; |
| 126 | |
| 127 | switch (len) { |
| 128 | case 8: *(int8_t *)ptr = (int8_t) v; |
| 129 | break; |
| 130 | case 16: |
| 131 | *(int16_t *)ptr = rbo ? GUINT16_SWAP_LE_BE((int16_t) v) : |
| 132 | (int16_t) v; |
| 133 | break; |
| 134 | case 32: |
| 135 | *(int32_t *)ptr = rbo ? GUINT32_SWAP_LE_BE((int32_t) v) : |
| 136 | (int32_t) v; |
| 137 | break; |
| 138 | case 64: |
| 139 | *(int64_t *)ptr = rbo ? GUINT64_SWAP_LE_BE(v) : v; |
| 140 | break; |
| 141 | default: |
| 142 | assert(0); |
| 143 | } |
| 144 | end: |
| 145 | return len; |
| 146 | } |