projects / babeltrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 6dc2ca62 MD |
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 | } |