1 | /* |
2 | * Copyright (c) 2015-2016, Intel Corporation |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are met: |
6 | * |
7 | * * Redistributions of source code must retain the above copyright notice, |
8 | * this list of conditions and the following disclaimer. |
9 | * * Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * * Neither the name of Intel Corporation nor the names of its contributors |
13 | * may be used to endorse or promote products derived from this software |
14 | * without specific prior written permission. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
26 | * POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | /** \file |
30 | * \brief Compile-time error utils. |
31 | */ |
32 | #include "allocator.h" |
33 | #include "error.h" |
34 | #include "ue2common.h" |
35 | #include "hs_compile.h" |
36 | #include "util/compile_error.h" |
37 | |
38 | #include <cstring> |
39 | #include <string> |
40 | |
41 | using std::string; |
42 | |
43 | static const char failureNoMemory[] = "Unable to allocate memory." ; |
44 | static const char failureInternal[] = "Internal error." ; |
45 | static const char failureBadAlloc[] = "Allocator returned misaligned memory." ; |
46 | |
47 | extern const hs_compile_error_t hs_enomem = { |
48 | const_cast<char *>(failureNoMemory), 0 |
49 | }; |
50 | extern const hs_compile_error_t hs_einternal = { |
51 | const_cast<char *>(failureInternal), 0 |
52 | }; |
53 | extern const hs_compile_error_t hs_badalloc = { |
54 | const_cast<char *>(failureBadAlloc), 0 |
55 | }; |
56 | |
57 | namespace ue2 { |
58 | |
59 | hs_compile_error_t *generateCompileError(const string &err, int expression) { |
60 | hs_compile_error_t *ret = |
61 | (struct hs_compile_error *)hs_misc_alloc(sizeof(hs_compile_error_t)); |
62 | if (ret) { |
63 | hs_error_t e = hs_check_alloc(ret); |
64 | if (e != HS_SUCCESS) { |
65 | hs_misc_free(ret); |
66 | return const_cast<hs_compile_error_t *>(&hs_badalloc); |
67 | } |
68 | char *msg = (char *)hs_misc_alloc(err.size() + 1); |
69 | if (msg) { |
70 | e = hs_check_alloc(msg); |
71 | if (e != HS_SUCCESS) { |
72 | hs_misc_free(msg); |
73 | return const_cast<hs_compile_error_t *>(&hs_badalloc); |
74 | } |
75 | memcpy(msg, err.c_str(), err.size() + 1); |
76 | ret->message = msg; |
77 | } else { |
78 | hs_misc_free(ret); |
79 | ret = nullptr; |
80 | } |
81 | } |
82 | |
83 | if (!ret || !ret->message) { |
84 | return const_cast<hs_compile_error_t *>(&hs_enomem); |
85 | } |
86 | |
87 | ret->expression = expression; |
88 | |
89 | return ret; |
90 | } |
91 | |
92 | hs_compile_error_t *generateCompileError(const CompileError &e) { |
93 | return generateCompileError(e.reason, e.hasIndex ? (int)e.index : -1); |
94 | } |
95 | |
96 | void freeCompileError(hs_compile_error_t *error) { |
97 | if (!error) { |
98 | return; |
99 | } |
100 | if (error == &hs_enomem || error == &hs_einternal || |
101 | error == &hs_badalloc) { |
102 | // These are not allocated. |
103 | return; |
104 | } |
105 | |
106 | hs_misc_free(error->message); |
107 | hs_misc_free(error); |
108 | } |
109 | |
110 | } // namespace ue2 |
111 | |