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107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
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/***************************************************************************
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rlhistoryreader.h - description
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-------------------
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begin : Wed Dec 06 2006
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copyright : (C) 2006 by R. Lehrig
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email : lehrig@t-online.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as *
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* published by the Free Software Foundation *
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* *
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***************************************************************************/
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#ifndef _RL_HISTORY_READER_H_
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#define _RL_HISTORY_READER_H_
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#include "rldefine.h"
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#include "rltime.h"
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#include <stdio.h>
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typedef struct _rlHistoryReaderLine_
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{
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_rlHistoryReaderLine_ *next;
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char *line;
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}rlHistoryReaderLine;
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/*! <pre>
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This class reads tab separated text including time stamp from 10 csv files
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Use it together with rlHistoryLogger.
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Example usage within pvbrowser slot function:
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#include "rlhistoryreader.h"
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typedef struct // (todo: define your data structure here)
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{
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rlHistoryReader hist;
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}
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DATA;
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...snip...
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static int slotButtonEvent(PARAM *p, int id, DATA *d)
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{
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if(p == NULL || id == 0 || d == NULL) return -1;
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if(id == buttonShowPlot)
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{
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rlTime tStart, tDiff, tEnd;
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tStart.year = 2009;
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tStart.month = 8;
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tStart.day = 29;
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tStart.hour = 0;
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tDiff.hour = 24;
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tEnd = tStart + tDiff;
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printf("start=%s diff=%s end=%s\n",tStart.getTimeString(), tDiff.getTimeString(), tEnd.getTimeString());
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if(d->hist.read("test", &tStart, &tEnd) < 0)
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{
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printf("could not read test csv file\n");
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return 0;
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}
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const char *line = d->hist.firstLine();
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while(*line != '\\0')
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{
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printf("line=%s", line);
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const char *values = strchr(line,'\t');
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if(values != NULL)
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{
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float val1, val2;
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sscanf(values,"\t%f\t%f", &val1, &val2);
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printf("val1=%f val2=%f\n", val1, val2);
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//// fill your buffer for plotting here
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}
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line = d->hist.nextLine();
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}
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//// display your xy-graphic from the filled buffer here
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}
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return 0;
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}
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</pre> */
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class rlHistoryReader
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{
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public:
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rlHistoryReader();
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virtual ~rlHistoryReader();
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int read(const char *csvName, rlTime *start, rlTime *end);
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const char *firstLine();
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const char *nextLine();
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int clean();
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int cat(const char *csvName, FILE *fout);
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int debug;
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private:
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int openFile();
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int pushLineToMemory(const char *line);
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rlHistoryReaderLine *first_line,*current_line;
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rlTime time;
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FILE *fin;
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int current_file;
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char *csv_name, *csv_file_name;
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};
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#endif
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