122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/*--------------------------------------------------------------------------*\
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FILE........: extract.c
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AUTHOR......: David Rowe
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DATE CREATED: 23/2/95
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This program extracts a float file of vectors from a text file
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of vectors. The float files are easier to process quickly
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during VQ training. A subset of the text file VQ may be
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extracted to faciltate split VQ of scaler VQ design.
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\*--------------------------------------------------------------------------*/
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/*
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Copyright (C) 2009 David Rowe
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All rights reserved.
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This program 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 version 2, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define MAX_STR 256 /* maximum string length */
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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void scan_line(FILE *fp, float f[], int n);
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int main(int argc, char *argv[]) {
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FILE *ftext; /* text file of vectors */
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FILE *ffloat; /* float file of vectors */
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int st,en; /* start and end values of vector to copy */
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float *buf; /* ptr to vector read from ftext */
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long lines; /* lines read so far */
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if (argc != 5) {
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printf("usage: extract TextFile FloatFile start end\n");
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exit(0);
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}
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/* read command line arguments and open files */
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ftext = fopen(argv[1],"rt");
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if (ftext == NULL) {
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printf("Error opening text file: %s\n",argv[1]);
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exit(1);
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}
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ffloat = fopen(argv[2],"wb");
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if (ffloat == NULL) {
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printf("Error opening float file: %s\n",argv[2]);
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exit(1);
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}
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st = atoi(argv[3]);
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en = atoi(argv[4]);
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buf = (float*)malloc(en*sizeof(float));
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if (buf == NULL) {
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printf("Error in malloc()\n");
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exit(1);
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}
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lines = 0;
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while(!feof(ftext)) {
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scan_line(ftext, buf, en);
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fwrite(&buf[st-1], sizeof(float), en-st+1, ffloat);
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printf("\r%ld lines",lines++);
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}
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printf("\n");
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/* clean up and exit */
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free(buf);
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fclose(ftext);
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fclose(ffloat);
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return 0;
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}
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/*---------------------------------------------------------------------------*\
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FUNCTION....: scan_line()
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AUTHOR......: David Rowe
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DATE CREATED: 20/2/95
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This function reads a vector of floats from a line in a text file.
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\*---------------------------------------------------------------------------*/
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void scan_line(FILE *fp, float f[], int n)
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/* FILE *fp; file ptr to text file */
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/* float f[]; array of floats to return */
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/* int n; number of floats in line */
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{
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char s[MAX_STR];
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char *ps,*pe;
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int i;
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fgets(s,MAX_STR,fp);
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ps = pe = s;
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for(i=0; i<n; i++) {
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while( isspace(*pe)) pe++;
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while( !isspace(*pe)) pe++;
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sscanf(ps,"%f",&f[i]);
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ps = pe;
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}
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}
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