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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
#ifndef _C4_YML_COMMON_HPP_
#define _C4_YML_COMMON_HPP_
#include <cstddef>
#include <c4/substr.hpp>
#include <c4/yml/export.hpp>
#ifndef RYML_USE_ASSERT
# define RYML_USE_ASSERT C4_USE_ASSERT
#endif
#if RYML_USE_ASSERT
# define RYML_ASSERT(cond) RYML_CHECK(cond)
# define RYML_ASSERT_MSG(cond, msg) RYML_CHECK_MSG(cond, msg)
#else
# define RYML_ASSERT(cond)
# define RYML_ASSERT_MSG(cond, msg)
#endif
#if defined(NDEBUG) || defined(C4_NO_DEBUG_BREAK)
# define RYML_DEBUG_BREAK()
#else
# define RYML_DEBUG_BREAK() \
{ \
if(c4::get_error_flags() & c4::ON_ERROR_DEBUGBREAK) \
{ \
C4_DEBUG_BREAK(); \
} \
}
#endif
#define RYML_CHECK(cond) \
do { \
if(!(cond)) \
{ \
RYML_DEBUG_BREAK() \
c4::yml::error("check failed: " #cond, c4::yml::Location(__FILE__, __LINE__, 0)); \
} \
} while(0)
#define RYML_CHECK_MSG(cond, msg) \
do \
{ \
if(!(cond)) \
{ \
RYML_DEBUG_BREAK() \
c4::yml::error(msg ": check failed: " #cond, c4::yml::Location(__FILE__, __LINE__, 0)); \
} \
} while(0)
#if C4_CPP >= 14
# define RYML_DEPRECATED(msg) [[deprecated(msg)]]
#else
# if defined(_MSC_VER)
# define RYML_DEPRECATED(msg) __declspec(deprecated(msg))
# else // defined(__GNUC__) || defined(__clang__)
# define RYML_DEPRECATED(msg) __attribute__((deprecated(msg)))
# endif
#endif
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
namespace c4 {
namespace yml {
enum : size_t {
/** a null position */
npos = size_t(-1),
/** an index to none */
NONE = size_t(-1)
};
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//! holds a position into a source buffer
struct RYML_EXPORT LineCol
{
//! number of bytes from the beginning of the source buffer
size_t offset;
//! line
size_t line;
//! column
size_t col;
LineCol() : offset(), line(), col() {}
//! construct from line and column
LineCol(size_t l, size_t c) : offset(0), line(l), col(c) {}
//! construct from offset, line and column
LineCol(size_t o, size_t l, size_t c) : offset(o), line(l), col(c) {}
};
//! a source file position
struct RYML_EXPORT Location : public LineCol
{
csubstr name;
operator bool () const { return !name.empty() || line != 0 || offset != 0; }
Location() : LineCol(), name() {}
Location( size_t l, size_t c) : LineCol{ l, c}, name( ) {}
Location( csubstr n, size_t l, size_t c) : LineCol{ l, c}, name(n) {}
Location( csubstr n, size_t b, size_t l, size_t c) : LineCol{b, l, c}, name(n) {}
Location(const char *n, size_t l, size_t c) : LineCol{ l, c}, name(to_csubstr(n)) {}
Location(const char *n, size_t b, size_t l, size_t c) : LineCol{b, l, c}, name(to_csubstr(n)) {}
};
//-----------------------------------------------------------------------------
/** the type of the function used to report errors. This function must
* interrupt execution, either by raising an exception or calling
* std::abort().
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
using pfn_error = void (*)(const char* msg, size_t msg_len, Location location, void *user_data);
/** the type of the function used to allocate memory */
using pfn_allocate = void* (*)(size_t len, void* hint, void *user_data);
/** the type of the function used to free memory */
using pfn_free = void (*)(void* mem, size_t size, void *user_data);
/** trigger an error: call the current error callback. */
RYML_EXPORT void error(const char *msg, size_t msg_len, Location loc);
/** @overload error */
inline void error(const char *msg, size_t msg_len)
{
error(msg, msg_len, Location{});
}
/** @overload error */
template<size_t N>
inline void error(const char (&msg)[N], Location loc)
{
error(msg, N-1, loc);
}
/** @overload error */
template<size_t N>
inline void error(const char (&msg)[N])
{
error(msg, N-1, Location{});
}
//-----------------------------------------------------------------------------
/** a c-style callbacks class
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
struct RYML_EXPORT Callbacks
{
void * m_user_data;
pfn_allocate m_allocate;
pfn_free m_free;
pfn_error m_error;
Callbacks();
Callbacks(void *user_data, pfn_allocate alloc, pfn_free free, pfn_error error_);
bool operator!= (Callbacks const& that) const { return !operator==(that); }
bool operator== (Callbacks const& that) const
{
return (m_user_data == that.m_user_data &&
m_allocate == that.m_allocate &&
m_free == that.m_free &&
m_error == that.m_error);
}
};
/** set the global callbacks.
*
* @warning the error callback must never return: it must either abort
* or throw an exception. Otherwise, the parser will enter into an
* infinite loop, or the program may crash. */
RYML_EXPORT void set_callbacks(Callbacks const& c);
/// get the global callbacks
RYML_EXPORT Callbacks const& get_callbacks();
/// set the global callbacks back to their defaults
RYML_EXPORT void reset_callbacks();
/// @cond dev
#define _RYML_CB_ERR(cb, msg_literal) \
do \
{ \
const char msg[] = msg_literal; \
RYML_DEBUG_BREAK() \
(cb).m_error(msg, sizeof(msg), c4::yml::Location(__FILE__, 0, __LINE__, 0), (cb).m_user_data); \
} while(0)
#define _RYML_CB_CHECK(cb, cond) \
do \
{ \
if(!(cond)) \
{ \
const char msg[] = "check failed: " #cond; \
RYML_DEBUG_BREAK() \
(cb).m_error(msg, sizeof(msg), c4::yml::Location(__FILE__, 0, __LINE__, 0), (cb).m_user_data); \
} \
} while(0)
#ifdef RYML_USE_ASSERT
#define _RYML_CB_ASSERT(cb, cond) _RYML_CB_CHECK((cb), (cond))
#else
#define _RYML_CB_ASSERT(cb, cond) do {} while(0)
#endif
#define _RYML_CB_ALLOC_HINT(cb, T, num, hint) (T*) (cb).m_allocate((num) * sizeof(T), (hint), (cb).m_user_data)
#define _RYML_CB_ALLOC(cb, T, num) _RYML_CB_ALLOC_HINT((cb), (T), (num), nullptr)
#define _RYML_CB_FREE(cb, buf, T, num) \
do { \
(cb).m_free((buf), (num) * sizeof(T), (cb).m_user_data); \
(buf) = nullptr; \
} while(0)
namespace detail {
template<int8_t signedval, uint8_t unsignedval>
struct _charconstant_t
: public std::conditional<std::is_signed<char>::value,
std::integral_constant<int8_t, signedval>,
std::integral_constant<uint8_t, unsignedval>>::type
{};
#define _RYML_CHCONST(signedval, unsignedval) ::c4::yml::detail::_charconstant_t<INT8_C(signedval), UINT8_C(unsignedval)>::value
} // namespace detail
namespace detail {
struct _SubstrWriter
{
substr buf;
size_t pos;
_SubstrWriter(substr buf_, size_t pos_=0) : buf(buf_), pos(pos_) {}
void append(csubstr s)
{
C4_ASSERT(!s.overlaps(buf));
if(pos + s.len <= buf.len)
memcpy(buf.str + pos, s.str, s.len);
pos += s.len;
}
void append(char c)
{
if(pos < buf.len)
buf.str[pos] = c;
++pos;
}
void append_n(char c, size_t numtimes)
{
if(pos + numtimes < buf.len)
memset(buf.str + pos, c, numtimes);
pos += numtimes;
}
size_t slack() const { return pos <= buf.len ? buf.len - pos : 0; }
size_t excess() const { return pos > buf.len ? pos - buf.len : 0; }
//! get the part written so far
csubstr curr() const { return pos <= buf.len ? buf.first(pos) : buf; }
//! get the part that is still free to write to (the remainder)
substr rem() { return pos < buf.len ? buf.sub(pos) : buf.last(0); }
size_t advance(size_t more) { pos += more; return pos; }
};
} // namespace detail
/// @endcond
} // namespace yml
} // namespace c4
#endif /* _C4_YML_COMMON_HPP_ */
|