| 1 | /* |
| 2 | * BabelTrace - Enumeration Type |
| 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 | #include <stdint.h> |
| 24 | #include <glib.h> |
| 25 | |
| 26 | struct enum_table { |
| 27 | GHashTable *value_to_quark; /* Tuples (value, GQuark) */ |
| 28 | GHashTable *quark_to_value; /* Tuples (GQuark, value) */ |
| 29 | }; |
| 30 | |
| 31 | #if (__WORDSIZE == 32) |
| 32 | GQuark enum_uint_to_quark(const struct type_class_enum *enum_class, uint64_t v) |
| 33 | { |
| 34 | gconstpointer q = g_hash_table_lookup(enum_class->table.value_to_quark, |
| 35 | &v); |
| 36 | return (GQuark) (unsigned long) q; |
| 37 | } |
| 38 | |
| 39 | GQuark enum_int_to_quark(const struct type_class_enum *enum_class, uint64_t v) |
| 40 | { |
| 41 | gconstpointer q = g_hash_table_lookup(enum_class->table.value_to_quark, |
| 42 | &v); |
| 43 | return (GQuark) (unsigned long) q; |
| 44 | } |
| 45 | |
| 46 | uint64_t enum_quark_to_uint(const struct type_class_enum *enum_class, |
| 47 | size_t len, int byte_order, GQuark q) |
| 48 | { |
| 49 | gconstpointer v = g_hash_table_lookup(enum_class->table.quark_to_value, |
| 50 | (gconstpointer) q); |
| 51 | return *(const uint64_t *) v; |
| 52 | } |
| 53 | |
| 54 | int64_t enum_quark_to_int(const struct type_class_enum *enum_class, |
| 55 | size_t len, int byte_order, GQuark q) |
| 56 | { |
| 57 | gconstpointer v = g_hash_table_lookup(enum_class->table.quark_to_value, |
| 58 | (gconstpointer) q); |
| 59 | return *(const int64_t *) v; |
| 60 | } |
| 61 | |
| 62 | guint enum_val_hash(gconstpointer key) |
| 63 | { |
| 64 | int64_t ukey = *(const int64_t *)key; |
| 65 | |
| 66 | return (guint)ukey ^ (guint)(ukey >> 32); |
| 67 | } |
| 68 | |
| 69 | gboolean enum_val_equal(gconstpointer a, gconstpointer b) |
| 70 | { |
| 71 | int64_t ua = *(const int64_t *)a; |
| 72 | int64_t ub = *(const int64_t *)b; |
| 73 | |
| 74 | return ua == ub; |
| 75 | } |
| 76 | |
| 77 | void enum_val_free(void *ptr) |
| 78 | { |
| 79 | g_free(ptr); |
| 80 | } |
| 81 | |
| 82 | void enum_signed_insert(struct type_class_enum *enum_class, int64_t v, GQuark q) |
| 83 | { |
| 84 | int64_t *valuep = g_new(int64_t, 1); |
| 85 | |
| 86 | g_hash_table_insert(enum_class->table>value_to_quark, valuep, |
| 87 | (gpointer) (unsigned long) q); |
| 88 | g_hash_table_insert(enum_class->table.quark_to_value, |
| 89 | (gpointer) (unsigned long) q, |
| 90 | valuep); |
| 91 | } |
| 92 | |
| 93 | void enum_unsigned_insert(struct type_class_enum *enum_class, uint64_t v, GQuark q) |
| 94 | { |
| 95 | uint64_t *valuep = g_new(uint64_t, 1); |
| 96 | |
| 97 | g_hash_table_insert(enum_class->table.value_to_quark, valuep, |
| 98 | (gpointer) (unsigned long) q); |
| 99 | g_hash_table_insert(enum_class->table.quark_to_value, |
| 100 | (gpointer) (unsigned long) q, |
| 101 | valuep); |
| 102 | } |
| 103 | #else /* __WORDSIZE != 32 */ |
| 104 | GQuark enum_uint_to_quark(const struct type_class_enum *enum_class, uint64_t v) |
| 105 | { |
| 106 | gconstpointer q = g_hash_table_lookup(enum_class->table.value_to_quark, |
| 107 | (gconstpointer) v); |
| 108 | return (GQuark) (unsigned long) q; |
| 109 | } |
| 110 | |
| 111 | GQuark enum_int_to_quark(const struct type_class_enum *enum_class, uint64_t v) |
| 112 | { |
| 113 | gconstpointer q = g_hash_table_lookup(enum_class->table.value_to_quark, |
| 114 | (gconstpointer) v); |
| 115 | return (GQuark) (unsigned long) q; |
| 116 | } |
| 117 | |
| 118 | uint64_t enum_quark_to_uint(const struct type_class_enum *enum_class, |
| 119 | size_t len, int byte_order, GQuark q) |
| 120 | { |
| 121 | gconstpointer v = g_hash_table_lookup(enum_class->table.quark_to_value, |
| 122 | (gconstpointer) (unsigned long) q); |
| 123 | return *(const uint64_t *) v; |
| 124 | } |
| 125 | |
| 126 | int64_t enum_quark_to_int(const struct type_class_enum *enum_class, |
| 127 | size_t len, int byte_order, GQuark q) |
| 128 | { |
| 129 | gconstpointer v = g_hash_table_lookup(enum_class->table.quark_to_value, |
| 130 | (gconstpointer) (unsigned long) q); |
| 131 | return *(const int64_t *) v; |
| 132 | } |
| 133 | |
| 134 | guint enum_val_hash(gconstpointer key) |
| 135 | { |
| 136 | return g_direct_hash(key); |
| 137 | } |
| 138 | |
| 139 | gboolean enum_val_equal(gconstpointer a, gconstpointer b) |
| 140 | { |
| 141 | return g_direct_equal(a, b); |
| 142 | } |
| 143 | |
| 144 | void enum_val_free(void *ptr) |
| 145 | { |
| 146 | } |
| 147 | |
| 148 | void enum_signed_insert(struct type_class_enum *enum_class, |
| 149 | int64_t v, GQuark q) |
| 150 | { |
| 151 | g_hash_table_insert(enum_class->table.value_to_quark, (gpointer) v, |
| 152 | (gpointer) (unsigned long) q); |
| 153 | g_hash_table_insert(enum_class->table.quark_to_value, |
| 154 | (gpointer) (unsigned long) q, |
| 155 | valuep); |
| 156 | } |
| 157 | |
| 158 | void enum_unsigned_insert(struct type_class_enum *enum_class, |
| 159 | uint64_t v, GQuark q) |
| 160 | { |
| 161 | g_hash_table_insert(enum_class->table.value_to_quark, (gpointer) v, |
| 162 | (gpointer) (unsigned long) q); |
| 163 | g_hash_table_insert(enum_class->table.quark_to_value, |
| 164 | (gpointer) (unsigned long) q, |
| 165 | valuep); |
| 166 | } |
| 167 | #endif /* __WORDSIZE != 32 */ |
| 168 | |
| 169 | size_t enum_copy(unsigned char *dest, const struct format *fdest, |
| 170 | const unsigned char *src, const struct format *fsrc, |
| 171 | const struct type_class *type_class) |
| 172 | { |
| 173 | struct type_class_enum *enum_class = |
| 174 | container_of(type_class, struct type_class_enum, p); |
| 175 | struct type_class_integer *int_class = &enum_class->p; |
| 176 | GQuark v; |
| 177 | |
| 178 | v = fsrc->enum_read(src, enum_class) |
| 179 | return fdest->enum_write(dest, enum_class, v); |
| 180 | } |
| 181 | |
| 182 | void enum_type_free(struct type_class_enum *enum_class) |
| 183 | { |
| 184 | g_hash_table_destroy(enum_class->table.value_to_quark); |
| 185 | g_hash_table_destroy(enum_class->table.quark_to_value); |
| 186 | g_free(enum_class); |
| 187 | } |
| 188 | |
| 189 | static |
| 190 | void _enum_type_free(struct type_class *type_class) |
| 191 | { |
| 192 | struct type_class_enum *enum_class = |
| 193 | container_of(type_class, struct type_class_enum, p); |
| 194 | enum_type_free(enum_class); |
| 195 | } |
| 196 | |
| 197 | struct type_class_enum *enum_type_new(const char *name, |
| 198 | size_t len, int byte_order, |
| 199 | int signedness, |
| 200 | size_t alignment) |
| 201 | { |
| 202 | struct type_class_integer *int_class; |
| 203 | int ret; |
| 204 | |
| 205 | enum_class = g_new(struct type_class_enum, 1); |
| 206 | enum_class->table.value_to_quark = g_hash_table(enum_val_hash, |
| 207 | enum_val_equal); |
| 208 | enum_class->table.quark_to_value = g_hash_table_new_full(g_direct_hash, |
| 209 | g_direct_equal, |
| 210 | NULL, enum_val_free); |
| 211 | int_class = &enum_class->p; |
| 212 | int_class->p.name = g_quark_from_string(name); |
| 213 | int_class->p.alignment = alignment; |
| 214 | int_class->p.copy = enum_copy; |
| 215 | int_class->p.free = _enum_type_free; |
| 216 | int_class->len = len; |
| 217 | int_class->byte_order = byte_order; |
| 218 | int_class->signedness = signedness; |
| 219 | if (int_class->p.name) { |
| 220 | ret = register_type(&int_class->p); |
| 221 | if (ret) { |
| 222 | g_hash_table_destroy(enum_class->table.value_to_quark); |
| 223 | g_hash_table_destroy(enum_class->table.quark_to_value); |
| 224 | g_free(enum_class); |
| 225 | return NULL; |
| 226 | } |
| 227 | } |
| 228 | return enum_class; |
| 229 | } |