44 lines
923 B
C
44 lines
923 B
C
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//////////////////////////////////////
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// Cunren Liang, NASA JPL/Caltech
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// Copyright 2017
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//////////////////////////////////////
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#include "resamp.h"
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FILE *openfile(char *filename, char *pattern){
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FILE *fp;
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fp=fopen(filename, pattern);
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if (fp==NULL){
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fprintf(stderr,"Error: cannot open file: %s\n", filename);
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exit(1);
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}
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return fp;
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}
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void readdata(void *data, size_t blocksize, FILE *fp){
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if(fread(data, blocksize, 1, fp) != 1){
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fprintf(stderr,"Error: cannot read data\n");
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exit(1);
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}
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}
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void writedata(void *data, size_t blocksize, FILE *fp){
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if(fwrite(data, blocksize, 1, fp) != 1){
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fprintf(stderr,"Error: cannot write data\n");
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exit(1);
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}
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}
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long file_length(FILE* fp, long width, long element_size){
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long length;
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fseeko(fp,0L,SEEK_END);
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length = ftello(fp) / element_size / width;
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rewind(fp);
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return length;
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}
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