fix warning
[m6w6/ext-psi] / src / types / decl_struct.c
1 /*******************************************************************************
2 Copyright (c) 2016, Michael Wallner <mike@php.net>.
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
7
8 * Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13
14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
18 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
22 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *******************************************************************************/
25
26 #include "php_psi_stdinc.h"
27 #include "data.h"
28
29 #include <assert.h>
30
31 struct psi_decl_struct* psi_decl_struct_init(const char *name,
32 struct psi_plist *args)
33 {
34 struct psi_decl_struct *s = calloc(1, sizeof(*s));
35 s->name = strdup(name);
36 s->args = args;
37 return s;
38 }
39
40 void psi_decl_struct_free(struct psi_decl_struct **s_ptr)
41 {
42 if (*s_ptr) {
43 struct psi_decl_struct *s = *s_ptr;
44
45 *s_ptr = NULL;
46 if (s->token) {
47 free(s->token);
48 }
49 if (s->args) {
50 psi_plist_free(s->args);
51 }
52 if (s->engine.type && s->engine.dtor) {
53 s->engine.dtor(s->engine.type);
54 }
55 free(s->name);
56 free(s);
57 }
58 }
59
60 void psi_decl_struct_dump(int fd, struct psi_decl_struct *strct)
61 {
62 dprintf(fd, "struct %s::(%zu, %zu)", strct->name, strct->align,
63 strct->size);
64 if (psi_plist_count(strct->args)) {
65 psi_decl_type_dump_args_with_layout(fd, strct->args, 0);
66 } else {
67 dprintf(fd, ";");
68 }
69 }
70
71 struct psi_decl_arg *psi_decl_struct_get_arg(struct psi_decl_struct *s,
72 struct psi_decl_var *var)
73 {
74 if (s->args) {
75 return psi_decl_arg_get_by_var(var, s->args, NULL);
76 }
77
78 return NULL;
79 }
80
81 bool psi_decl_struct_validate(struct psi_data *data, struct psi_decl_struct *s,
82 struct psi_validate_scope *scope)
83 {
84 size_t i, pos, len, size, align;
85 struct psi_decl_arg *darg, *prev_arg;
86
87 if (!s) {
88 return false;
89 }
90 if (psi_validate_scope_has_struct(scope, s->name)) {
91 return true;
92 }
93
94 if (!s->size && !psi_plist_count(s->args)) {
95 /* TODO: return true and check those structs are only used by address */
96 /* suppress needless warning
97 data->error(data, s->token, PSI_WARNING, "Empty struct %s",
98 s->name);
99 */
100 return false;
101 }
102
103 psi_validate_scope_add_struct(scope, s->name, s);
104
105 for (i = 0; psi_plist_get(s->args, i, &darg); ++i) {
106 darg->var->arg = darg;
107
108 if (!psi_decl_arg_validate(data, darg, scope)) {
109 psi_validate_scope_del_struct(scope, s->name);
110 return false;
111 }
112
113 if (darg->layout && darg->layout->len) {
114 pos = darg->layout->pos;
115 align = psi_decl_arg_align(darg, &pos, &len);
116
117 if (!align) {
118 data->error(data, darg->token, PSI_WARNING,
119 "Computed zero alignment of %s.%s of type '%s'",
120 len, s->name, darg->var->name, darg->type->name);
121 psi_validate_scope_del_struct(scope, s->name);
122 return false;
123 }
124
125 if (darg->layout->len != len) {
126 data->error(data, darg->token, PSI_WARNING,
127 "Computed size %zu of %s.%s does not match"
128 " pre-defined size %zu of type '%s'",
129 len, s->name, darg->var->name, darg->layout->len,
130 darg->type->name);
131 }
132 if (darg->layout->pos != pos) {
133 data->error(data, darg->token, PSI_WARNING,
134 "Computed offset %zu of %s.%s does not match"
135 " pre-defined offset %zu",
136 pos, s->name, darg->var->name, darg->layout->pos);
137 }
138 } else {
139 if (i) {
140 if (prev_arg->layout && prev_arg->layout->bfw && darg->layout && darg->layout->bfw) {
141 struct psi_decl_type *real = NULL;
142 size_t max_bfw = 8 * psi_decl_type_get_size(prev_arg->type, &real);
143
144 switch (real->type) {
145 case PSI_T_INT8:
146 case PSI_T_UINT8:
147 case PSI_T_INT16:
148 case PSI_T_UINT16:
149 case PSI_T_INT32:
150 case PSI_T_UINT32:
151 case PSI_T_INT64:
152 case PSI_T_UINT64:
153 break;
154 default:
155 data->error(data, darg->token, PSI_WARNING,
156 "Unsupported type for bit field: %s", real->name);
157 psi_validate_scope_del_struct(scope, s->name);
158 return false;
159 }
160 darg->layout->bfw->pos = prev_arg->layout->bfw->pos + prev_arg->layout->bfw->len;
161 if (max_bfw >= darg->layout->bfw->pos + darg->layout->bfw->len) {
162 pos = prev_arg->layout->pos;
163 } else {
164 darg->layout->bfw->pos = 0;
165 pos = prev_arg->layout->pos + prev_arg->layout->len;
166 }
167 } else {
168 pos = prev_arg->layout->pos + prev_arg->layout->len;
169 }
170 } else {
171 pos = 0;
172 }
173
174 align = psi_decl_arg_align(darg, &pos, &len);
175
176 if (darg->layout) {
177 if (darg->layout->pos != pos) {
178 data->error(data, darg->token, PSI_WARNING,
179 "Computed offset %zu of %s.%s does not match"
180 " pre-defined offset %zu",
181 pos, s->name, darg->var->name, darg->layout->pos);
182 }
183 darg->layout->pos = pos;
184 darg->layout->len = len;
185 } else {
186 darg->layout = psi_layout_init(pos, len, NULL);
187 }
188 }
189
190 if (align > s->align) {
191 s->align = align;
192 }
193 prev_arg = darg;
194 }
195
196 if (psi_plist_count(s->args)) {
197 psi_plist_sort(s->args, psi_layout_sort_cmp, NULL);
198 psi_plist_get(s->args, psi_plist_count(s->args) - 1, &darg);
199
200 size = darg->layout->pos + darg->layout->len;
201 if (s->size < size) {
202 s->size = psi_align(size, s->align);
203 }
204 }
205
206 assert(s->size);
207
208 return true;
209 }
210
211 size_t psi_decl_struct_get_align(struct psi_decl_struct *s)
212 {
213 if (!s) {
214 return 0;
215 }
216 if (!s->align) {
217 s->align = psi_decl_type_get_args_align(s->args);
218 }
219 return s->align;
220 }