1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include <stdlib.h>
#include <string.h>
#include "sl_pp_context.h"
#include "sl_pp_process.h"
#include "sl_pp_public.h"
/**
* Declare an extension to the preprocessor. This tells the preprocessor
* which extensions are supported by Mesa.
* The shader still needs to have a "#extension name: behavior" line to enable
* the extension.
*/
int
sl_pp_context_add_extension(struct sl_pp_context *context,
const char *name)
{
struct sl_pp_extension ext;
if (context->num_extensions == SL_PP_MAX_EXTENSIONS) {
return -1;
}
ext.name = sl_pp_context_add_unique_str(context, name);
if (ext.name == -1) {
return -1;
}
ext.enabled = 0;
context->extensions[context->num_extensions++] = ext;
assert(context->num_extensions <= sizeof(context->extensions));
return 0;
}
/**
* Process a "#extension name: behavior" directive.
*/
int
sl_pp_process_extension(struct sl_pp_context *context,
const struct sl_pp_token_info *input,
unsigned int first,
unsigned int last,
struct sl_pp_process_state *state)
{
int extension_name = -1;
int behavior = -1;
struct sl_pp_token_info out;
struct sl_pp_extension *extension = NULL;
/* Grab the extension name. */
if (first < last && input[first].token == SL_PP_IDENTIFIER) {
extension_name = input[first].data.identifier;
first++;
}
if (extension_name == -1) {
strcpy(context->error_msg, "expected identifier after `#extension'");
return -1;
}
/* Make sure the extension is supported. */
if (extension_name == context->dict.all) {
out.data.extension = extension_name;
} else {
unsigned int i;
out.data.extension = -1;
for (i = 0; i < context->num_extensions; i++) {
if (extension_name == context->extensions[i].name) {
out.data.extension = extension_name;
extension = &context->extensions[i];
break;
}
}
}
/* Grab the colon separating the extension name and behavior. */
while (first < last && input[first].token == SL_PP_WHITESPACE) {
first++;
}
if (first < last && input[first].token == SL_PP_COLON) {
first++;
} else {
strcpy(context->error_msg, "expected `:' after extension name");
return -1;
}
while (first < last && input[first].token == SL_PP_WHITESPACE) {
first++;
}
/* Grab the behavior name. */
if (first < last && input[first].token == SL_PP_IDENTIFIER) {
behavior = input[first].data.identifier;
first++;
}
if (behavior == -1) {
strcpy(context->error_msg, "expected identifier after `:'");
return -1;
}
if (behavior == context->dict.require) {
if (out.data.extension == -1) {
strcpy(context->error_msg, "the required extension is not supported");
return -1;
}
if (out.data.extension == context->dict.all) {
strcpy(context->error_msg, "invalid behavior for `all' extension: `require'");
return -1;
}
out.token = SL_PP_EXTENSION_REQUIRE;
if (extension_name != context->dict.all) {
assert(extension);
extension->enabled = 1;
}
} else if (behavior == context->dict.enable) {
if (out.data.extension == -1) {
/* Warning: the extension cannot be enabled. */
return 0;
}
if (out.data.extension == context->dict.all) {
strcpy(context->error_msg, "invalid behavior for `all' extension: `enable'");
return -1;
}
out.token = SL_PP_EXTENSION_ENABLE;
if (extension_name != context->dict.all) {
assert(extension);
extension->enabled = 1;
}
} else if (behavior == context->dict.warn) {
if (out.data.extension == -1) {
/* Warning: the extension is not supported. */
return 0;
}
out.token = SL_PP_EXTENSION_WARN;
if (extension_name != context->dict.all) {
assert(extension);
extension->enabled = 1;
}
} else if (behavior == context->dict.disable) {
if (out.data.extension == -1) {
/* Warning: the extension is not supported. */
return 0;
}
out.token = SL_PP_EXTENSION_DISABLE;
if (extension_name != context->dict.all) {
assert(extension);
extension->enabled = 0;
}
} else {
strcpy(context->error_msg, "unrecognised behavior name");
return -1;
}
/* Grab the end of line. */
while (first < last && input[first].token == SL_PP_WHITESPACE) {
first++;
}
if (first < last) {
strcpy(context->error_msg, "expected end of line after behavior name");
return -1;
}
if (sl_pp_process_out(state, &out)) {
return -1;
}
return 0;
}
|
