| //===-- SourceManager.cpp ---------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/Core/SourceManager.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/Stream.h" |
| |
| using namespace lldb_private; |
| |
| static inline bool is_newline_char(char ch) |
| { |
| return ch == '\n' || ch == '\r'; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // SourceManager constructor |
| //---------------------------------------------------------------------- |
| SourceManager::SourceManager() : |
| m_file_cache (), |
| m_last_file_sp (), |
| m_last_file_line (0), |
| m_last_file_context_before (0), |
| m_last_file_context_after (0) |
| { |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| SourceManager::~SourceManager() |
| { |
| } |
| |
| size_t |
| SourceManager::DisplaySourceLines |
| ( |
| const FileSpec &file_spec, |
| uint32_t line, |
| uint32_t context_before, |
| uint32_t context_after, |
| Stream *s |
| ) |
| { |
| m_last_file_sp = GetFile (file_spec); |
| m_last_file_line = line + context_after + 1; |
| m_last_file_context_before = context_before; |
| m_last_file_context_after = context_after; |
| if (m_last_file_sp.get()) |
| return m_last_file_sp->DisplaySourceLines (line, context_before, context_after, s); |
| |
| return 0; |
| } |
| |
| SourceManager::FileSP |
| SourceManager::GetFile (const FileSpec &file_spec) |
| { |
| FileSP file_sp; |
| FileCache::iterator pos = m_file_cache.find(file_spec); |
| if (pos != m_file_cache.end()) |
| file_sp = pos->second; |
| else |
| { |
| file_sp.reset (new File (file_spec)); |
| m_file_cache[file_spec] = file_sp; |
| } |
| return file_sp; |
| } |
| |
| size_t |
| SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile |
| ( |
| uint32_t line, |
| uint32_t context_before, |
| uint32_t context_after, |
| const char* current_line_cstr, |
| Stream *s |
| ) |
| { |
| if (line == 0) |
| { |
| if (m_last_file_line != 0 |
| && m_last_file_line != UINT32_MAX) |
| line = m_last_file_line + context_before; |
| else |
| line = 1; |
| } |
| |
| m_last_file_line = line + context_after + 1; |
| m_last_file_context_before = context_before; |
| m_last_file_context_after = context_after; |
| |
| if (context_before == UINT32_MAX) |
| context_before = 0; |
| if (context_after == UINT32_MAX) |
| context_after = 10; |
| |
| if (m_last_file_sp.get()) |
| { |
| const uint32_t start_line = line <= context_before ? 1 : line - context_before; |
| const uint32_t end_line = line + context_after; |
| uint32_t curr_line; |
| for (curr_line = start_line; curr_line <= end_line; ++curr_line) |
| { |
| if (!m_last_file_sp->LineIsValid (curr_line)) |
| { |
| m_last_file_line = UINT32_MAX; |
| break; |
| } |
| |
| s->Printf("%4u %2.2s\t", curr_line, curr_line == line ? current_line_cstr : ""); |
| if (m_last_file_sp->DisplaySourceLines (curr_line, 0, 0, s) == 0) |
| { |
| m_last_file_line = UINT32_MAX; |
| break; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| size_t |
| SourceManager::DisplaySourceLinesWithLineNumbers |
| ( |
| const FileSpec &file_spec, |
| uint32_t line, |
| uint32_t context_before, |
| uint32_t context_after, |
| const char* current_line_cstr, |
| Stream *s |
| ) |
| { |
| bool same_as_previous = m_last_file_sp && m_last_file_sp->FileSpecMatches (file_spec); |
| |
| if (!same_as_previous) |
| m_last_file_sp = GetFile (file_spec); |
| |
| if (line == 0) |
| { |
| if (!same_as_previous) |
| m_last_file_line = 0; |
| } |
| |
| return DisplaySourceLinesWithLineNumbersUsingLastFile (line, context_before, context_after, current_line_cstr, s); |
| } |
| |
| size_t |
| SourceManager::DisplayMoreWithLineNumbers (Stream *s) |
| { |
| if (m_last_file_sp) |
| { |
| if (m_last_file_line == UINT32_MAX) |
| return 0; |
| DisplaySourceLinesWithLineNumbersUsingLastFile (0, m_last_file_context_before, m_last_file_context_after, "", s); |
| } |
| return 0; |
| } |
| |
| |
| |
| SourceManager::File::File(const FileSpec &file_spec) : |
| m_file_spec(file_spec), |
| m_data_sp(file_spec.ReadFileContents ()), |
| m_offsets() |
| { |
| } |
| |
| SourceManager::File::~File() |
| { |
| } |
| |
| uint32_t |
| SourceManager::File::GetLineOffset (uint32_t line) |
| { |
| if (line == 0) |
| return UINT32_MAX; |
| |
| if (line == 1) |
| return 0; |
| |
| if (CalculateLineOffsets (line)) |
| { |
| if (line < m_offsets.size()) |
| return m_offsets[line - 1]; // yes we want "line - 1" in the index |
| } |
| return UINT32_MAX; |
| } |
| |
| bool |
| SourceManager::File::LineIsValid (uint32_t line) |
| { |
| if (line == 0) |
| return false; |
| |
| if (CalculateLineOffsets (line)) |
| return line < m_offsets.size(); |
| return false; |
| } |
| |
| size_t |
| SourceManager::File::DisplaySourceLines (uint32_t line, uint32_t context_before, uint32_t context_after, Stream *s) |
| { |
| const uint32_t start_line = line <= context_before ? 1 : line - context_before; |
| const uint32_t start_line_offset = GetLineOffset (start_line); |
| if (start_line_offset != UINT32_MAX) |
| { |
| const uint32_t end_line = line + context_after; |
| uint32_t end_line_offset = GetLineOffset (end_line + 1); |
| if (end_line_offset == UINT32_MAX) |
| end_line_offset = m_data_sp->GetByteSize(); |
| |
| assert (start_line_offset <= end_line_offset); |
| size_t bytes_written = 0; |
| if (start_line_offset < end_line_offset) |
| { |
| size_t count = end_line_offset - start_line_offset; |
| const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset; |
| bytes_written = s->Write(cstr, count); |
| if (!is_newline_char(cstr[count-1])) |
| bytes_written += s->EOL(); |
| } |
| return bytes_written; |
| } |
| return 0; |
| } |
| |
| bool |
| SourceManager::File::FileSpecMatches (const FileSpec &file_spec) |
| { |
| return FileSpec::Compare (m_file_spec, file_spec, false) == 0; |
| } |
| |
| |
| bool |
| SourceManager::File::CalculateLineOffsets (uint32_t line) |
| { |
| line = UINT32_MAX; // TODO: take this line out when we support partial indexing |
| if (line == UINT32_MAX) |
| { |
| // Already done? |
| if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX) |
| return true; |
| |
| if (m_offsets.empty()) |
| { |
| if (m_data_sp.get() == NULL) |
| return false; |
| |
| const char *start = (char *)m_data_sp->GetBytes(); |
| if (start) |
| { |
| const char *end = start + m_data_sp->GetByteSize(); |
| |
| // Calculate all line offsets from scratch |
| |
| // Push a 1 at index zero to indicate the file has been completely indexed. |
| m_offsets.push_back(UINT32_MAX); |
| register const char *s; |
| for (s = start; s < end; ++s) |
| { |
| register char curr_ch = *s; |
| if (is_newline_char (curr_ch)) |
| { |
| register char next_ch = s[1]; |
| if (is_newline_char (next_ch)) |
| { |
| if (curr_ch != next_ch) |
| ++s; |
| } |
| m_offsets.push_back(s + 1 - start); |
| } |
| } |
| if (!m_offsets.empty()) |
| { |
| if (m_offsets.back() < end - start) |
| m_offsets.push_back(end - start); |
| } |
| return true; |
| } |
| } |
| else |
| { |
| // Some lines have been populated, start where we last left off |
| assert(!"Not implemented yet"); |
| } |
| |
| } |
| else |
| { |
| // Calculate all line offsets up to "line" |
| assert(!"Not implemented yet"); |
| } |
| return false; |
| } |