Verifies string tensor has legit buffer contents that follow the schema defined in lite/string_util.h
| 55 | // Verifies string tensor has legit buffer contents that follow the schema |
| 56 | // defined in lite/string_util.h |
| 57 | bool VerifyStringTensorBuffer(const Tensor& tensor, const Buffer& buffer, |
| 58 | ErrorReporter* error_reporter) { |
| 59 | uint32_t buffer_size = buffer.data()->size(); |
| 60 | if (buffer_size < sizeof(uint32_t)) { |
| 61 | ReportError(error_reporter, "String tensor %s is invalid (empty)", |
| 62 | tensor.name()->c_str()); |
| 63 | return false; |
| 64 | } |
| 65 | const char* buffer_ptr = reinterpret_cast<const char*>(buffer.data()->data()); |
| 66 | |
| 67 | uint32_t num_strings = *GetIntPtr(buffer_ptr); |
| 68 | if (num_strings > kMaxNumString) { |
| 69 | ReportError(error_reporter, |
| 70 | "String tensor %s has invalid num of string set: %d", |
| 71 | tensor.name()->c_str(), num_strings); |
| 72 | return false; |
| 73 | } |
| 74 | uint32_t header_offsets = |
| 75 | static_cast<uint32_t>(num_strings + 2) * sizeof(int32_t); |
| 76 | |
| 77 | if (buffer_size < header_offsets) { |
| 78 | ReportError(error_reporter, |
| 79 | "String tensor %s buffer requires at least %d bytes, but is " |
| 80 | "allocated with %d bytes", |
| 81 | tensor.name()->c_str(), header_offsets, buffer_size); |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | uint32_t prev_ptr = header_offsets; |
| 86 | uint32_t offset = sizeof(int32_t); |
| 87 | |
| 88 | if (*GetIntPtr(buffer_ptr + offset) != header_offsets) { |
| 89 | ReportError(error_reporter, |
| 90 | "String tensor %s buffer initial offset must be: %d", |
| 91 | tensor.name()->c_str(), header_offsets); |
| 92 | return false; |
| 93 | } |
| 94 | offset += sizeof(int32_t); |
| 95 | for (int i = 1; i <= num_strings; i++, offset += sizeof(int32_t)) { |
| 96 | int string_offset = *GetIntPtr(buffer_ptr + offset); |
| 97 | if (string_offset < prev_ptr || string_offset > buffer_size) { |
| 98 | ReportError(error_reporter, |
| 99 | "String tensor %s buffer is invalid: index %d", |
| 100 | tensor.name()->c_str(), i); |
| 101 | return false; |
| 102 | } |
| 103 | } |
| 104 | if (*GetIntPtr(buffer_ptr + offset - sizeof(int32_t)) != buffer_size) { |
| 105 | ReportError(error_reporter, |
| 106 | "String tensor %s buffer last offset must be %d", |
| 107 | tensor.name()->c_str(), buffer_size); |
| 108 | return false; |
| 109 | } |
| 110 | return true; |
| 111 | } |
| 112 | |
| 113 | // Verifies numeric tensor has legit buffer. |
| 114 | bool VerifyNumericTensorBuffer(const Tensor& tensor, const Buffer& buffer, |
no test coverage detected