| 1 | /* |
| 2 | * float.c |
| 3 | * |
| 4 | * BabelTrace - Float Type Converter |
| 5 | * |
| 6 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation |
| 7 | * |
| 8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * |
| 10 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 11 | * of this software and associated documentation files (the "Software"), to deal |
| 12 | * in the Software without restriction, including without limitation the rights |
| 13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 14 | * copies of the Software, and to permit persons to whom the Software is |
| 15 | * furnished to do so, subject to the following conditions: |
| 16 | * |
| 17 | * The above copyright notice and this permission notice shall be included in |
| 18 | * all copies or substantial portions of the Software. |
| 19 | * |
| 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 26 | * SOFTWARE. |
| 27 | */ |
| 28 | |
| 29 | #include <babeltrace/compiler.h> |
| 30 | #include <babeltrace/format.h> |
| 31 | #include <babeltrace/types.h> |
| 32 | #include <babeltrace/endian.h> |
| 33 | |
| 34 | static |
| 35 | struct bt_definition *_float_definition_new(struct bt_declaration *declaration, |
| 36 | struct definition_scope *parent_scope, |
| 37 | GQuark field_name, int index, |
| 38 | const char *root_name); |
| 39 | static |
| 40 | void _float_definition_free(struct bt_definition *definition); |
| 41 | |
| 42 | static |
| 43 | void _float_declaration_free(struct bt_declaration *declaration) |
| 44 | { |
| 45 | struct declaration_float *float_declaration = |
| 46 | container_of(declaration, struct declaration_float, p); |
| 47 | |
| 48 | bt_declaration_unref(&float_declaration->exp->p); |
| 49 | bt_declaration_unref(&float_declaration->mantissa->p); |
| 50 | bt_declaration_unref(&float_declaration->sign->p); |
| 51 | g_free(float_declaration); |
| 52 | } |
| 53 | |
| 54 | struct declaration_float * |
| 55 | bt_float_declaration_new(size_t mantissa_len, |
| 56 | size_t exp_len, int byte_order, size_t alignment) |
| 57 | { |
| 58 | struct declaration_float *float_declaration; |
| 59 | struct bt_declaration *declaration; |
| 60 | |
| 61 | float_declaration = g_new(struct declaration_float, 1); |
| 62 | declaration = &float_declaration->p; |
| 63 | declaration->id = CTF_TYPE_FLOAT; |
| 64 | declaration->alignment = alignment; |
| 65 | declaration->declaration_free = _float_declaration_free; |
| 66 | declaration->definition_new = _float_definition_new; |
| 67 | declaration->definition_free = _float_definition_free; |
| 68 | declaration->ref = 1; |
| 69 | float_declaration->byte_order = byte_order; |
| 70 | |
| 71 | float_declaration->sign = bt_integer_declaration_new(1, |
| 72 | byte_order, false, 1, 2, |
| 73 | CTF_STRING_NONE, NULL); |
| 74 | float_declaration->mantissa = bt_integer_declaration_new(mantissa_len - 1, |
| 75 | byte_order, false, 1, 10, |
| 76 | CTF_STRING_NONE, NULL); |
| 77 | float_declaration->exp = bt_integer_declaration_new(exp_len, |
| 78 | byte_order, true, 1, 10, |
| 79 | CTF_STRING_NONE, NULL); |
| 80 | return float_declaration; |
| 81 | } |
| 82 | |
| 83 | static |
| 84 | struct bt_definition * |
| 85 | _float_definition_new(struct bt_declaration *declaration, |
| 86 | struct definition_scope *parent_scope, |
| 87 | GQuark field_name, int index, |
| 88 | const char *root_name) |
| 89 | { |
| 90 | struct declaration_float *float_declaration = |
| 91 | container_of(declaration, struct declaration_float, p); |
| 92 | struct definition_float *_float; |
| 93 | struct bt_definition *tmp; |
| 94 | |
| 95 | _float = g_new(struct definition_float, 1); |
| 96 | bt_declaration_ref(&float_declaration->p); |
| 97 | _float->p.declaration = declaration; |
| 98 | _float->declaration = float_declaration; |
| 99 | _float->p.scope = bt_new_definition_scope(parent_scope, field_name, root_name); |
| 100 | _float->p.path = bt_new_definition_path(parent_scope, field_name, root_name); |
| 101 | if (float_declaration->byte_order == LITTLE_ENDIAN) { |
| 102 | tmp = float_declaration->mantissa->p.definition_new(&float_declaration->mantissa->p, |
| 103 | _float->p.scope, g_quark_from_static_string("mantissa"), 0, NULL); |
| 104 | _float->mantissa = container_of(tmp, struct definition_integer, p); |
| 105 | tmp = float_declaration->exp->p.definition_new(&float_declaration->exp->p, |
| 106 | _float->p.scope, g_quark_from_static_string("exp"), 1, NULL); |
| 107 | _float->exp = container_of(tmp, struct definition_integer, p); |
| 108 | tmp = float_declaration->sign->p.definition_new(&float_declaration->sign->p, |
| 109 | _float->p.scope, g_quark_from_static_string("sign"), 2, NULL); |
| 110 | _float->sign = container_of(tmp, struct definition_integer, p); |
| 111 | } else { |
| 112 | tmp = float_declaration->sign->p.definition_new(&float_declaration->sign->p, |
| 113 | _float->p.scope, g_quark_from_static_string("sign"), 0, NULL); |
| 114 | _float->sign = container_of(tmp, struct definition_integer, p); |
| 115 | tmp = float_declaration->exp->p.definition_new(&float_declaration->exp->p, |
| 116 | _float->p.scope, g_quark_from_static_string("exp"), 1, NULL); |
| 117 | _float->exp = container_of(tmp, struct definition_integer, p); |
| 118 | tmp = float_declaration->mantissa->p.definition_new(&float_declaration->mantissa->p, |
| 119 | _float->p.scope, g_quark_from_static_string("mantissa"), 2, NULL); |
| 120 | _float->mantissa = container_of(tmp, struct definition_integer, p); |
| 121 | } |
| 122 | _float->p.ref = 1; |
| 123 | /* |
| 124 | * Use INT_MAX order to ensure that all fields of the parent |
| 125 | * scope are seen as being prior to this scope. |
| 126 | */ |
| 127 | _float->p.index = root_name ? INT_MAX : index; |
| 128 | _float->p.name = field_name; |
| 129 | _float->value = 0.0; |
| 130 | if (parent_scope) { |
| 131 | int ret; |
| 132 | |
| 133 | ret = bt_register_field_definition(field_name, &_float->p, |
| 134 | parent_scope); |
| 135 | assert(!ret); |
| 136 | } |
| 137 | return &_float->p; |
| 138 | } |
| 139 | |
| 140 | static |
| 141 | void _float_definition_free(struct bt_definition *definition) |
| 142 | { |
| 143 | struct definition_float *_float = |
| 144 | container_of(definition, struct definition_float, p); |
| 145 | |
| 146 | bt_definition_unref(&_float->sign->p); |
| 147 | bt_definition_unref(&_float->exp->p); |
| 148 | bt_definition_unref(&_float->mantissa->p); |
| 149 | bt_free_definition_scope(_float->p.scope); |
| 150 | bt_declaration_unref(_float->p.declaration); |
| 151 | g_free(_float); |
| 152 | } |