csv2json.cpp

/*
Copyright (c) 2012-2023 James Baker

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

The official repository for this library is at https://github.com/VA7ODR/json

*/
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>
#if defined USE_DATA_DOCUMENT
#	include "data.hpp"
#else
#	include "json.hpp"
#endif

std::vector<std::vector<sdstring>> CSVData;

sdstring deQuote(const sdstring & strIn)
{
	sdstring str(strIn);
	if (str[0] == '\"') {
		str = str.substr(1);
	}
	if (str[str.length() - 1] == '\"') {
		str = str.substr(0, str.length() - 1);
	}
	return str;
}

size_t ParseCSV(const sdstring & szFileName)
{
	FILE * fp;

	size_t iLines = 0;

	fp = fopen(szFileName.c_str(), "r");
	if (fp) {
		fseek(fp, 0, SEEK_END);
		size_t l = ftell(fp);
		fseek(fp, 0, SEEK_SET);

		char * szData = new char[l + 1];

		char * szField = szData;

		memset(szData, 0, l + 1);
		if (fread(szData, 1, l, fp) != l) {
			printf("Error reading file.");
		}
		fclose(fp);

		bool bQuote = false;

		size_t iFields = 0;

		for (size_t i = 0; i < l; i++) {
			if (bQuote) {
				if (szData[i] == '\"') {
					bQuote = false;
				}
			} else {
				if (szData[i] == '\"') {
					bQuote = true;
					continue;
				} else if (szData[i] == ',') {
					printf("Got Comma %i characters %i lines %i fields\n", (int)i, (int)iLines, (int)iFields);
					if (iLines >= CSVData.size()) {
						CSVData.resize(iLines + 1);
					}
					CSVData[iLines].push_back(deQuote(sdstring(szField, &szData[i] - szField)));
					szField = &szData[i] + 1;
					iFields++;
				} else if (szData[i] == '\n') {
					printf("Got newline %i characters %i lines %i fields\n", (int)i, (int)iLines, (int)iFields);
					if (iLines >= CSVData.size()) {
						CSVData.resize(iLines + 1);
					}
					CSVData[iLines].push_back(deQuote(sdstring(szField, &szData[i] - szField)));
					iFields = 0;
					szField = &szData[i] + 1;
					iLines++;
				} else if (i == l - 1) {
					printf("Got end %i characters %i lines %i fields\n", (int)i, (int)iLines, (int)iFields);
					if (iLines >= CSVData.size()) {
						CSVData.resize(iLines + 1);
					}
					CSVData[iLines].push_back(deQuote(sdstring(szField)));
					iFields = 0;
					// szField = &szData[i] + 1;
					iLines++;
				}
			}
		}
		delete[] szData;
	}
	return iLines;
}

int main(int argc, char ** argv)
{
	if (std::string(argv[0]) == "csv2xml") {
		if (argc != 4) {
			printf("Useage: %s input.csv output.json root_tag\n", argv[0]);
			return 1;
		}
	} else {
		if (argc != 3) {
			printf("Useage: %s input.csv output.json \n", argv[0]);
			return 1;
		}
	}
	size_t iLines = ParseCSV(argv[1]);

#if defined USE_DATA_DOCUMENT
	odata::document outDoc;
#else
	ojson::document outDoc;
#endif
	for (size_t i = 1; i < iLines; i++) {
		for (size_t j = 0; j < CSVData[i].size(); j++) {
			if (CSVData[0][j].empty()) {
				continue;
			}
			// printf("%s = %s\n", CSVData[0][j].c_str(), CSVData[i][j].c_str());
			outDoc[i - 1][CSVData[0][j]] = CSVData[i][j];
		}
	}
#if defined USE_DATA_DOCUMENT
	if (std::string(argv[0]) == "csv2xml") {
		outDoc.writeXMLFile(argv[2], argv[3], true);
		return 0;
	}
#endif
	outDoc.writeFile(argv[2], true);
	return 0;
}