| 1 | /* |
| 2 | * sequence.c |
| 3 | * |
| 4 | * BabelTrace - Sequence Type Converter |
| 5 | * |
| 6 | * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | */ |
| 18 | |
| 19 | #include <babeltrace/compiler.h> |
| 20 | #include <babeltrace/format.h> |
| 21 | |
| 22 | #ifndef max |
| 23 | #define max(a, b) ((a) < (b) ? (b) : (a)) |
| 24 | #endif |
| 25 | |
| 26 | static |
| 27 | struct type *_sequence_type_new(struct type_class *type_class, |
| 28 | struct declaration_scope *parent_scope); |
| 29 | static |
| 30 | void _sequence_type_free(struct type *type); |
| 31 | |
| 32 | void sequence_copy(struct stream_pos *dest, const struct format *fdest, |
| 33 | struct stream_pos *src, const struct format *fsrc, |
| 34 | struct type *type) |
| 35 | { |
| 36 | struct type_sequence *sequence = |
| 37 | container_of(type, struct type_sequence, p); |
| 38 | struct type_class_sequence *sequence_class = sequence->_class; |
| 39 | uint64_t i; |
| 40 | |
| 41 | fsrc->sequence_begin(src, sequence); |
| 42 | fdest->sequence_begin(dest, sequence); |
| 43 | |
| 44 | sequence->len->p._class->copy(dest, fdest, src, fsrc, |
| 45 | &sequence->len->p); |
| 46 | |
| 47 | for (i = 0; i < sequence->len->value._unsigned; i++) { |
| 48 | struct type *elem_type = sequence->current_element.type; |
| 49 | elem_type->p._class->copy(dest, fdest, src, fsrc, elem_type); |
| 50 | } |
| 51 | fsrc->sequence_end(src, sequence); |
| 52 | fdest->sequence_end(dest, sequence); |
| 53 | } |
| 54 | |
| 55 | static |
| 56 | void _sequence_type_class_free(struct type_class *type_class) |
| 57 | { |
| 58 | struct type_class_sequence *sequence_class = |
| 59 | container_of(type_class, struct type_class_sequence, p); |
| 60 | |
| 61 | type_class_unref(&sequence_class->len_class->p); |
| 62 | type_class_unref(sequence_class->elem); |
| 63 | g_free(sequence_class); |
| 64 | } |
| 65 | |
| 66 | struct type_class_sequence * |
| 67 | sequence_type_class_new(const char *name, struct type_class_integer *len_class, |
| 68 | struct type_class *elem) |
| 69 | { |
| 70 | struct type_class_sequence *sequence_class; |
| 71 | struct type_class *type_class; |
| 72 | int ret; |
| 73 | |
| 74 | sequence_class = g_new(struct type_class_sequence, 1); |
| 75 | type_class = &sequence_class->p; |
| 76 | assert(!len_class->signedness); |
| 77 | type_ref(&len_class->p); |
| 78 | sequence_class->len_class = len_class; |
| 79 | type_ref(elem); |
| 80 | sequence_class->elem = elem; |
| 81 | type_class->name = g_quark_from_string(name); |
| 82 | type_class->alignment = max(len_class->p.alignment, |
| 83 | elem->alignment); |
| 84 | type_class->copy = sequence_copy; |
| 85 | type_class->class_free = _sequence_type_class_free; |
| 86 | type_class->type_new = _sequence_type_new; |
| 87 | type_class->type_free = _sequence_type_free; |
| 88 | type_class->ref = 1; |
| 89 | |
| 90 | if (type_class->name) { |
| 91 | ret = register_type(type_class); |
| 92 | if (ret) |
| 93 | goto error_register; |
| 94 | } |
| 95 | return sequence_class; |
| 96 | |
| 97 | error_register: |
| 98 | type_class_unref(&len_class->p); |
| 99 | type_class_unref(elem); |
| 100 | g_free(sequence_class); |
| 101 | return NULL; |
| 102 | } |
| 103 | |
| 104 | static |
| 105 | struct type *_sequence_type_new(struct type_class *type_class, |
| 106 | struct declaration_scope *parent_scope) |
| 107 | { |
| 108 | struct type_class_sequence *sequence_class = |
| 109 | container_of(type_class, struct type_class_sequence, p); |
| 110 | struct type_sequence *sequence; |
| 111 | |
| 112 | sequence = g_new(struct type_sequence, 1); |
| 113 | type_class_ref(&sequence_class->p); |
| 114 | sequence->p._class = sequence_class; |
| 115 | sequence->p.ref = 1; |
| 116 | sequence->scope = new_declaration_scope(parent_scope); |
| 117 | sequence->len.type = |
| 118 | sequence_class->len_class.p->type_new(&sequence_class->len_class.p, |
| 119 | parent_scope); |
| 120 | sequence->current_element.type = |
| 121 | sequence_class->elem.p->type_new(&sequence_class->elem.p, |
| 122 | parent_scope); |
| 123 | return &sequence->p; |
| 124 | } |
| 125 | |
| 126 | static |
| 127 | void _sequence_type_free(struct type *type) |
| 128 | { |
| 129 | struct type_sequence *sequence = |
| 130 | container_of(type, struct type_sequence, p); |
| 131 | struct type *len_type = sequence->len.type; |
| 132 | struct type *elem_type = sequence->current_element.type; |
| 133 | |
| 134 | len_type->p._class->type_free(len_type); |
| 135 | elem_type->p._class->type_free(elem_type); |
| 136 | free_declaration_scope(sequence->scope); |
| 137 | type_class_unref(sequence->p._class); |
| 138 | g_free(sequence); |
| 139 | } |