ref: f5cc1c082fb481d491014b84194e07c5c612c1e5
dir: /test/utils/BufferedData.h/
#ifndef __BUFFEREDDATA_H__ #define __BUFFEREDDATA_H__ #include <gtest/gtest.h> #include <stddef.h> #include <stdlib.h> #include "../test_stdint.h" #include <algorithm> class BufferedData { public: BufferedData() : data_ (NULL), capacity_ (0), length_ (0) {} ~BufferedData() { free (data_); } bool PushBack (uint8_t c) { if (!EnsureCapacity (length_ + 1)) { return false; } data_[length_++] = c; return true; } bool PushBack (const uint8_t* data, size_t len) { if (!EnsureCapacity (length_ + len)) { return false; } memcpy (data_ + length_, data, len); length_ += len; return true; } size_t PopFront (uint8_t* ptr, size_t len) { len = std::min (length_, len); memcpy (ptr, data_, len); memmove (data_, data_ + len, length_ - len); if (-1 == SetLength (length_ - len)) return -1; return len; } void Clear() { length_ = 0; } int SetLength (size_t newLen) { if (EnsureCapacity (newLen)) { length_ = newLen; } else { Clear(); //FAIL () << "unable to alloc memory in SetLength()"; std::cout << "unable to alloc memory in SetLength()" << std::endl; return -1; } return 0; } size_t Length() const { return length_; } uint8_t* data() { return data_; } private: bool EnsureCapacity (size_t capacity) { if (capacity > capacity_) { size_t newsize = capacity * 2; uint8_t* data = static_cast<uint8_t*> (realloc (data_, newsize)); if (!data) return false; data_ = data; capacity_ = newsize; return true; } return true; } uint8_t* data_; size_t capacity_; size_t length_; }; #endif //__BUFFEREDDATA_H__