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Allow to skip lines from beginning #176

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Allow to skip lines from beginning #176

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17 changes: 16 additions & 1 deletion src/rapidcsv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -428,10 +428,12 @@ namespace rapidcsv
*/
explicit LineReaderParams(const bool pSkipCommentLines = false,
const char pCommentPrefix = '#',
const bool pSkipEmptyLines = false)
const bool pSkipEmptyLines = false,
const int pSkippedLinesCount = 0)
: mSkipCommentLines(pSkipCommentLines)
, mCommentPrefix(pCommentPrefix)
, mSkipEmptyLines(pSkipEmptyLines)
, mSkippedLinesCount(pSkippedLinesCount)
{
}

Expand All @@ -449,6 +451,11 @@ namespace rapidcsv
* @brief specifies whether to skip empty lines.
*/
bool mSkipEmptyLines;

/**
* @brief specifies the number of lines skipped from the start.
*/
int mSkippedLinesCount;
};

/**
Expand Down Expand Up @@ -1567,6 +1574,14 @@ namespace rapidcsv
int cr = 0;
int lf = 0;

// skip lines from the beginning
std::string line;
for (int i = 0; i < mLineReaderParams.mSkippedLinesCount; ++ i)
{
std::getline(pStream, line);
p_FileLength -= line.size() +1;
}

while (p_FileLength > 0)
{
const std::streamsize toReadLength = std::min<std::streamsize>(p_FileLength, bufLength);
Expand Down
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