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#include "slang-source-map.h"
namespace Slang {
void SourceMap::clear()
{
String empty;
m_file = empty;
m_sourceRoot = empty;
m_sources.clear();
m_names.clear();
m_sourcesContent.clear();
m_lineStarts.setCount(1);
m_lineStarts[0] = 0;
m_lineEntries.clear();
m_slicePool.clear();
}
void SourceMap::advanceToLine(Index nextLineIndex)
{
const Count currentLineIndex = getGeneratedLineCount() - 1;
SLANG_ASSERT(nextLineIndex >= currentLineIndex);
if (nextLineIndex <= currentLineIndex)
{
return;
}
const auto lastEntryIndex = m_lineEntries.getCount();
// For all the new entries they will need to point to the end
m_lineStarts.setCount(nextLineIndex + 1);
Index* starts = m_lineStarts.getBuffer();
for (Index i = currentLineIndex + 1; i < nextLineIndex + 1; ++i)
{
starts[i] = lastEntryIndex;
}
}
Index SourceMap::getNameIndex(const UnownedStringSlice& slice)
{
StringSlicePool::Handle handle;
if (!m_slicePool.findOrAdd(slice, handle))
{
// We know it can't possibly be used, so must be new (!)
m_names.add(handle);
return m_names.getCount() - 1;
}
// Okay, could already be in the list
const auto index = m_names.indexOf(handle);
if (index >= 0)
{
return index;
}
m_names.add(handle);
return m_names.getCount() - 1;
}
UnownedStringSlice SourceMap::getSourceFileName(Index sourceFileIndex) const
{
return m_slicePool.getSlice(m_sources[sourceFileIndex]);
}
Index SourceMap::getSourceFileIndex(const UnownedStringSlice& slice)
{
StringSlicePool::Handle handle;
if (!m_slicePool.findOrAdd(slice, handle))
{
// We know it can't possibly be used, so must be new (!)
m_sources.add(handle);
return m_sources.getCount() - 1;
}
// Okay, could already be in the list
const auto index = m_sources.indexOf(handle);
if (index >= 0)
{
return index;
}
m_sources.add(handle);
return m_sources.getCount() - 1;
}
Index SourceMap::findEntry(Index lineIndex, Index colIndex) const
{
auto entries = getEntriesForLine(lineIndex);
Index closestDist = 0x7fffffff;
Index bestIndex = -1;
const Count count = entries.getCount();
for (Index i = 0; i < count; ++i)
{
const Entry& entry = entries[i];
// We found an exact match
if (entry.generatedColumn == colIndex)
{
bestIndex = i;
break;
}
Index dist = entry.generatedColumn - colIndex;
dist = (dist < 0) ? -dist : dist;
if (dist < closestDist)
{
closestDist = dist;
bestIndex = i;
}
}
if (bestIndex < 0)
{
return bestIndex;
}
return m_lineStarts[lineIndex] + bestIndex;
}
} // namespace Slang
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