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1 | | -// Tencent is pleased to support the open source community by making RapidJSON available. |
2 | | -// |
3 | | -// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. |
4 | | -// |
5 | | -// Licensed under the MIT License (the "License"); you may not use this file except |
6 | | -// in compliance with the License. You may obtain a copy of the License at |
7 | | -// |
8 | | -// http://opensource.org/licenses/MIT |
9 | | -// |
10 | | -// Unless required by applicable law or agreed to in writing, software distributed |
11 | | -// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR |
12 | | -// CONDITIONS OF ANY KIND, either express or implied. See the License for the |
13 | | -// specific language governing permissions and limitations under the License. |
14 | | - |
15 | | -#ifndef RAPIDJSON_FILEREADSTREAM_H_ |
16 | | -#define RAPIDJSON_FILEREADSTREAM_H_ |
17 | | - |
18 | | -#include "rapidjson.h" |
19 | | -#include <cstdio> |
20 | | - |
21 | | -RAPIDJSON_NAMESPACE_BEGIN |
22 | | - |
23 | | -//! File byte stream for input using fread(). |
24 | | -/*! |
25 | | - \note implements Stream concept |
26 | | -*/ |
27 | | -class FileReadStream { |
28 | | -public: |
29 | | - typedef char Ch; //!< Character type (byte). |
30 | | - |
31 | | - //! Constructor. |
32 | | - /*! |
33 | | - \param fp File pointer opened for read. |
34 | | - \param buffer user-supplied buffer. |
35 | | - \param bufferSize size of buffer in bytes. Must >=4 bytes. |
36 | | - */ |
37 | | - FileReadStream(std::FILE* fp, char* buffer, size_t bufferSize) : fp_(fp), buffer_(buffer), bufferSize_(bufferSize), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { |
38 | | - RAPIDJSON_ASSERT(fp_ != 0); |
39 | | - RAPIDJSON_ASSERT(bufferSize >= 4); |
40 | | - Read(); |
41 | | - } |
42 | | - |
43 | | - Ch Peek() const { return *current_; } |
44 | | - Ch Take() { Ch c = *current_; Read(); return c; } |
45 | | - size_t Tell() const { return count_ + static_cast<size_t>(current_ - buffer_); } |
46 | | - |
47 | | - // Not implemented |
48 | | - void Put(Ch) { RAPIDJSON_ASSERT(false); } |
49 | | - void Flush() { RAPIDJSON_ASSERT(false); } |
50 | | - Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; } |
51 | | - size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; } |
52 | | - |
53 | | - // For encoding detection only. |
54 | | - const Ch* Peek4() const { |
55 | | - return (current_ + 4 <= bufferLast_) ? current_ : 0; |
56 | | - } |
57 | | - |
58 | | -private: |
59 | | - void Read() { |
60 | | - if (current_ < bufferLast_) |
61 | | - ++current_; |
62 | | - else if (!eof_) { |
63 | | - count_ += readCount_; |
64 | | - readCount_ = fread(buffer_, 1, bufferSize_, fp_); |
65 | | - bufferLast_ = buffer_ + readCount_ - 1; |
66 | | - current_ = buffer_; |
67 | | - |
68 | | - if (readCount_ < bufferSize_) { |
69 | | - buffer_[readCount_] = '\0'; |
70 | | - ++bufferLast_; |
71 | | - eof_ = true; |
72 | | - } |
73 | | - } |
74 | | - } |
75 | | - |
76 | | - std::FILE* fp_; |
77 | | - Ch *buffer_; |
78 | | - size_t bufferSize_; |
79 | | - Ch *bufferLast_; |
80 | | - Ch *current_; |
81 | | - size_t readCount_; |
82 | | - size_t count_; //!< Number of characters read |
83 | | - bool eof_; |
84 | | -}; |
85 | | - |
86 | | -RAPIDJSON_NAMESPACE_END |
87 | | - |
88 | | -#endif // RAPIDJSON_FILESTREAM_H_ |
| 1 | +// Tencent is pleased to support the open source community by making RapidJSON available. |
| 2 | +// |
| 3 | +// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. |
| 4 | +// |
| 5 | +// Licensed under the MIT License (the "License"); you may not use this file except |
| 6 | +// in compliance with the License. You may obtain a copy of the License at |
| 7 | +// |
| 8 | +// http://opensource.org/licenses/MIT |
| 9 | +// |
| 10 | +// Unless required by applicable law or agreed to in writing, software distributed |
| 11 | +// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR |
| 12 | +// CONDITIONS OF ANY KIND, either express or implied. See the License for the |
| 13 | +// specific language governing permissions and limitations under the License. |
| 14 | + |
| 15 | +#ifndef RAPIDJSON_FILEREADSTREAM_H_ |
| 16 | +#define RAPIDJSON_FILEREADSTREAM_H_ |
| 17 | + |
| 18 | +#include "stream.h" |
| 19 | +#include <cstdio> |
| 20 | + |
| 21 | +#ifdef __clang__ |
| 22 | +RAPIDJSON_DIAG_PUSH |
| 23 | +RAPIDJSON_DIAG_OFF(padded) |
| 24 | +RAPIDJSON_DIAG_OFF(unreachable-code) |
| 25 | +RAPIDJSON_DIAG_OFF(missing-noreturn) |
| 26 | +#endif |
| 27 | + |
| 28 | +RAPIDJSON_NAMESPACE_BEGIN |
| 29 | + |
| 30 | +//! File byte stream for input using fread(). |
| 31 | +/*! |
| 32 | + \note implements Stream concept |
| 33 | +*/ |
| 34 | +class FileReadStream { |
| 35 | +public: |
| 36 | + typedef char Ch; //!< Character type (byte). |
| 37 | + |
| 38 | + //! Constructor. |
| 39 | + /*! |
| 40 | + \param fp File pointer opened for read. |
| 41 | + \param buffer user-supplied buffer. |
| 42 | + \param bufferSize size of buffer in bytes. Must >=4 bytes. |
| 43 | + */ |
| 44 | + FileReadStream(std::FILE* fp, char* buffer, size_t bufferSize) : fp_(fp), buffer_(buffer), bufferSize_(bufferSize), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { |
| 45 | + RAPIDJSON_ASSERT(fp_ != 0); |
| 46 | + RAPIDJSON_ASSERT(bufferSize >= 4); |
| 47 | + Read(); |
| 48 | + } |
| 49 | + |
| 50 | + Ch Peek() const { return *current_; } |
| 51 | + Ch Take() { Ch c = *current_; Read(); return c; } |
| 52 | + size_t Tell() const { return count_ + static_cast<size_t>(current_ - buffer_); } |
| 53 | + |
| 54 | + // Not implemented |
| 55 | + void Put(Ch) { RAPIDJSON_ASSERT(false); } |
| 56 | + void Flush() { RAPIDJSON_ASSERT(false); } |
| 57 | + Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; } |
| 58 | + size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; } |
| 59 | + |
| 60 | + // For encoding detection only. |
| 61 | + const Ch* Peek4() const { |
| 62 | + return (current_ + 4 <= bufferLast_) ? current_ : 0; |
| 63 | + } |
| 64 | + |
| 65 | +private: |
| 66 | + void Read() { |
| 67 | + if (current_ < bufferLast_) |
| 68 | + ++current_; |
| 69 | + else if (!eof_) { |
| 70 | + count_ += readCount_; |
| 71 | + readCount_ = fread(buffer_, 1, bufferSize_, fp_); |
| 72 | + bufferLast_ = buffer_ + readCount_ - 1; |
| 73 | + current_ = buffer_; |
| 74 | + |
| 75 | + if (readCount_ < bufferSize_) { |
| 76 | + buffer_[readCount_] = '\0'; |
| 77 | + ++bufferLast_; |
| 78 | + eof_ = true; |
| 79 | + } |
| 80 | + } |
| 81 | + } |
| 82 | + |
| 83 | + std::FILE* fp_; |
| 84 | + Ch *buffer_; |
| 85 | + size_t bufferSize_; |
| 86 | + Ch *bufferLast_; |
| 87 | + Ch *current_; |
| 88 | + size_t readCount_; |
| 89 | + size_t count_; //!< Number of characters read |
| 90 | + bool eof_; |
| 91 | +}; |
| 92 | + |
| 93 | +RAPIDJSON_NAMESPACE_END |
| 94 | + |
| 95 | +#ifdef __clang__ |
| 96 | +RAPIDJSON_DIAG_POP |
| 97 | +#endif |
| 98 | + |
| 99 | +#endif // RAPIDJSON_FILESTREAM_H_ |
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