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
41using std::string;
42
43static const char failureNoMemory[] = "Unable to allocate memory.";
44static const char failureInternal[] = "Internal error.";
45static const char failureBadAlloc[] = "Allocator returned misaligned memory.";
46
47extern const hs_compile_error_t hs_enomem = {
48 const_cast<char *>(failureNoMemory), 0
49};
50extern const hs_compile_error_t hs_einternal = {
51 const_cast<char *>(failureInternal), 0
52};
53extern const hs_compile_error_t hs_badalloc = {
54 const_cast<char *>(failureBadAlloc), 0
55};
56
57namespace ue2 {
58
59hs_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
92hs_compile_error_t *generateCompileError(const CompileError &e) {
93 return generateCompileError(e.reason, e.hasIndex ? (int)e.index : -1);
94}
95
96void 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