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#include <climits>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "fpzip.h"
static int
usage()
{
fprintf(stderr, "%s\n", fpzip_version_string);
fprintf(stderr, "Usage: fpzip [options] [<infile] [>outfile]\n");
fprintf(stderr, "Options:\n");
fprintf(stderr, " -d : decompress\n");
fprintf(stderr, " -q : quiet mode\n");
fprintf(stderr, " -i <path> : input file (default=stdin)\n");
fprintf(stderr, " -o <path> : output file (default=stdout)\n");
fprintf(stderr, " -t <float|double> : scalar type (default=float)\n");
fprintf(stderr, " -p <precision> : number of bits of precision (default=full)\n");
fprintf(stderr, " -1 <nx> : dimensions of 1D array a[nx]\n");
fprintf(stderr, " -2 <nx> <ny> : dimensions of 2D array a[ny][nx]\n");
fprintf(stderr, " -3 <nx> <ny> <nz> : dimensions of 3D array a[nz][ny][nx]\n");
fprintf(stderr, " -4 <nx> <ny> <nz> <nf> : dimensions of multi-field 3D array a[nf][nz][ny][nx]\n");
return EXIT_FAILURE;
}
int main(int argc, char* argv[])
{
int type = FPZIP_TYPE_FLOAT;
int prec = 0;
int nx = 1;
int ny = 1;
int nz = 1;
int nf = 1;
char* inpath= 0;
char* outpath = 0;
bool zip = true;
bool quiet = false;
if (argc == 1)
return usage();
for (int i = 1; i < argc; i++)
if (!strcmp(argv[i], "-h"))
return usage();
else if (!strcmp(argv[i], "-d"))
zip = false;
else if (!strcmp(argv[i], "-q"))
quiet = true;
else if (!strcmp(argv[i], "-i")) {
if (++i == argc)
return usage();
inpath = argv[i];
}
else if (!strcmp(argv[i], "-o")) {
if (++i == argc)
return usage();
outpath = argv[i];
}
else if (!strcmp(argv[i], "-t")) {
if (++i == argc)
return usage();
if (!strcmp(argv[i], "float"))
type = FPZIP_TYPE_FLOAT;
else if (!strcmp(argv[i], "double"))
type = FPZIP_TYPE_DOUBLE;
else
return usage();
}
else if (!strcmp(argv[i], "-p")) {
if (++i == argc || sscanf(argv[i], "%d", &prec) != 1)
return usage();
}
else if (!strcmp(argv[i], "-1")) {
if (++i == argc || sscanf(argv[i], "%d", &nx) != 1)
return usage();
ny = nz = nf = 1;
}
else if (!strcmp(argv[i], "-2")) {
if (++i == argc || sscanf(argv[i], "%d", &nx) != 1 ||
++i == argc || sscanf(argv[i], "%d", &ny) != 1)
return usage();
nz = nf = 1;
}
else if (!strcmp(argv[i], "-3")) {
if (++i == argc || sscanf(argv[i], "%d", &nx) != 1 ||
++i == argc || sscanf(argv[i], "%d", &ny) != 1 ||
++i == argc || sscanf(argv[i], "%d", &nz) != 1)
return usage();
nf = 1;
}
else if (!strcmp(argv[i], "-4")) {
if (++i == argc || sscanf(argv[i], "%d", &nx) != 1 ||
++i == argc || sscanf(argv[i], "%d", &ny) != 1 ||
++i == argc || sscanf(argv[i], "%d", &nz) != 1 ||
++i == argc || sscanf(argv[i], "%d", &nf) != 1)
return usage();
}
// initialize
// allocate buffers
void* data = 0;
if (zip) {
// allocate memory for uncompressed data
size_t count = (size_t)nx * ny * nz * nf;
size_t size = (type == FPZIP_TYPE_FLOAT ? sizeof(float) : sizeof(double));
data = (type == FPZIP_TYPE_FLOAT ? static_cast<void*>(new float[count]) : static_cast<void*>(new double[count]));
if (prec == 0)
prec = (int)(CHAR_BIT * size);
else if (prec < 0 || (size_t)prec > CHAR_BIT * size) {
fprintf(stderr, "precision out of range\n");
return EXIT_FAILURE;
}
// read raw data
FILE* file = inpath ? fopen(inpath, "rb") : stdin;
if (!file) {
fprintf(stderr, "cannot open input file\n");
return EXIT_FAILURE;
}
if (fread(data, size, count, file) != count) {
fprintf(stderr, "cannot read input file\n");
return EXIT_FAILURE;
}
fclose(file);
// compress to file
file = outpath ? fopen(outpath, "wb") : stdout;
if (!file) {
fprintf(stderr, "cannot create output file\n");
return EXIT_FAILURE;
}
FPZ* fpz = fpzip_write_to_file(file);
fpz->type = type;
fpz->prec = prec;
fpz->nx = nx;
fpz->ny = ny;
fpz->nz = nz;
fpz->nf = nf;
// write header
if (!fpzip_write_header(fpz)) {
fprintf(stderr, "cannot write header: %s\n", fpzip_errstr[fpzip_errno]);
return EXIT_FAILURE;
}
// perform actual compression
size_t outbytes = fpzip_write(fpz, data);
if (!outbytes) {
fprintf(stderr, "compression failed: %s\n", fpzip_errstr[fpzip_errno]);
return EXIT_FAILURE;
}
fpzip_write_close(fpz);
fclose(file);
if (!quiet)
fprintf(stderr, "outbytes=%lu ratio=%.2f\n", (unsigned long)outbytes, double(nx) * ny * nz * nf * size / outbytes);
}
else {
// decompress from file
FILE* file = inpath ? fopen(inpath, "rb") : stdin;
if (!file) {
fprintf(stderr, "cannot open input file\n");
return EXIT_FAILURE;
}
FPZ* fpz = fpzip_read_from_file(file);
// read header
if (!fpzip_read_header(fpz)) {
fprintf(stderr, "cannot read header: %s\n", fpzip_errstr[fpzip_errno]);
return EXIT_FAILURE;
}
type = fpz->type;
prec = fpz->prec;
nx = fpz->nx;
ny = fpz->ny;
nz = fpz->nz;
nf = fpz->nf;
if (!quiet)
fprintf(stderr, "type=%s nx=%d ny=%d nz=%d nf=%d prec=%d\n", type == FPZIP_TYPE_FLOAT ? "float" : "double", nx, ny, nz, nf, prec);
size_t count = (size_t)nx * ny * nz * nf;
size_t size = (type == FPZIP_TYPE_FLOAT ? sizeof(float) : sizeof(double));
data = (type == FPZIP_TYPE_FLOAT ? static_cast<void*>(new float[count]) : static_cast<void*>(new double[count]));
// perform actual decompression
if (!fpzip_read(fpz, data)) {
fprintf(stderr, "decompression failed: %s\n", fpzip_errstr[fpzip_errno]);
return EXIT_FAILURE;
}
fpzip_read_close(fpz);
fclose(file);
// write decompressed data to file
file = outpath ? fopen(outpath, "wb") : stdout;
if (!file) {
fprintf(stderr, "cannot create output file\n");
return EXIT_FAILURE;
}
if (fwrite(data, size, count, file) != count) {
fprintf(stderr, "cannot write output file\n");
return EXIT_FAILURE;
}
fclose(file);
}
// deallocate buffers
if (type == FPZIP_TYPE_FLOAT)
delete[] static_cast<float*>(data);
else
delete[] static_cast<double*>(data);
return 0;
}
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