| 1 | /* |
| 2 | * BabelTrace - Float Type Converter |
| 3 | * |
| 4 | * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <babeltrace/compiler.h> |
| 22 | #include <babeltrace/types.h> |
| 23 | |
| 24 | void float_copy(struct stream_pos *dest, const struct format *fdest, |
| 25 | struct stream_pos *src, const struct format *fsrc, |
| 26 | const struct type_class *type_class) |
| 27 | { |
| 28 | struct type_class_float *float_class = |
| 29 | container_of(type_class, struct type_class_float, p); |
| 30 | |
| 31 | if (fsrc->float_copy == fdest->float_copy) { |
| 32 | fsrc->float_copy(dest, src, float_class); |
| 33 | } else { |
| 34 | double v; |
| 35 | |
| 36 | v = fsrc->double_read(src, float_class); |
| 37 | fdest->double_write(dest, float_class, v); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | void float_type_free(struct type_class_float *float_class) |
| 42 | { |
| 43 | g_free(float_class); |
| 44 | } |
| 45 | |
| 46 | static void _float_type_free(struct type_class *type_class) |
| 47 | { |
| 48 | struct type_class_float *float_class = |
| 49 | container_of(type_class, struct type_class_float, p); |
| 50 | float_type_free(float_class); |
| 51 | } |
| 52 | |
| 53 | struct type_class_float *float_type_new(const char *name, |
| 54 | size_t mantissa_len, |
| 55 | size_t exp_len, int byte_order, |
| 56 | size_t alignment) |
| 57 | { |
| 58 | struct type_class_float *float_class; |
| 59 | struct type_class_integer *int_class; |
| 60 | struct type_class *type_class; |
| 61 | int ret; |
| 62 | |
| 63 | float_class = g_new(struct type_class_float, 1); |
| 64 | type_class = &float_class->p; |
| 65 | |
| 66 | type_class->name = g_quark_from_string(name); |
| 67 | type_class->alignment = alignment; |
| 68 | type_class->copy = float_copy; |
| 69 | type_class->free = _float_type_free; |
| 70 | float_class->byte_order = byte_order; |
| 71 | |
| 72 | float_class->sign = integer_type_new(NULL, 1, |
| 73 | byte_order, false, 1); |
| 74 | if (!float_class->mantissa) |
| 75 | goto error_sign; |
| 76 | float_class->mantissa = integer_type_new(NULL, mantissa_len - 1, |
| 77 | byte_order, false, 1); |
| 78 | if (!float_class->mantissa) |
| 79 | goto error_mantissa; |
| 80 | float_class->exp = integer_type_new(NULL, exp_len, |
| 81 | byte_order, true, 1); |
| 82 | if (!float_class->exp) |
| 83 | goto error_exp; |
| 84 | |
| 85 | if (float_class->p.name) { |
| 86 | ret = ctf_register_type(&float_class->p); |
| 87 | if (ret) |
| 88 | goto error_register; |
| 89 | } |
| 90 | return float_class; |
| 91 | |
| 92 | error_register: |
| 93 | integer_type_free(float_class->exp); |
| 94 | error_exp: |
| 95 | integer_type_free(float_class->mantissa); |
| 96 | error_mantissa: |
| 97 | integer_type_free(float_class->sign); |
| 98 | error_sign: |
| 99 | g_free(float_class); |
| 100 | return NULL; |
| 101 | } |