90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
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// SPDX-License-Identifier: BSD-2-Clause
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// This code is part of the sfizz library and is licensed under a BSD 2-clause
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// license. You should have receive a LICENSE.md file along with the code.
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// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
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#include "DataHelpers.h"
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#include <string>
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#include <vector>
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#include <iostream>
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#include <sstream>
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#include <cstring>
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void load_txt(DataPoints& dp, std::istream& in)
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{
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struct RawValue {
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bool rowJump;
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float value;
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};
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std::vector<RawValue> raw;
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raw.reserve(1024);
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// read raw value data
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{
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std::string line;
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line.reserve(256);
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while (std::getline(in, line)) {
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size_t commentPos = line.find('#');
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if (commentPos == line.npos)
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line = line.substr(0, commentPos);
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std::istringstream lineIn(line);
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RawValue rv;
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rv.rowJump = true;
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while (lineIn >> rv.value) {
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raw.push_back(rv);
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rv.rowJump = false;
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}
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}
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}
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if (raw.empty()) {
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dp.rows = 0;
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dp.cols = 0;
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dp.data.reset();
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return;
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}
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// count rows and columns
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size_t numRows = 0;
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size_t numCols = 0;
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{
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size_t c = 0;
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for (const RawValue& rv : raw) {
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if (!rv.rowJump)
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++c;
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else {
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numRows += c != 0;
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c = 1;
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}
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numCols = std::max(numCols, c);
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}
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numRows += c != 0;
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}
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// fill the data
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float* data = new float[numRows * numCols];
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dp.rows = numRows;
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dp.cols = numCols;
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dp.data.reset(data);
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for (size_t i = 0, j = 0; i < numRows * numCols; ) {
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size_t c = 1;
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data[i++] = raw[j++].value;
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for (; j < raw.size() && !raw[j].rowJump; ++c)
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data[i++] = raw[j++].value;
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for ( ; c < numCols; ++c)
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data[i++] = 0.0f;
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}
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}
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bool load_txt_file(DataPoints& dp, const fs::path& path)
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{
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fs::ifstream in(path);
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load_txt(dp, in);
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return !in.bad();
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}
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