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/* compare ints - a test utility */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <inttypes.h>
/* Declarations */
/* Globals */
/* Functions */
int get_data(FILE *f, int64_t *dd, int signed_flag, int bytes) {
int res;
int8_t d_8;
int16_t d_16;
uint8_t d_u8;
uint16_t d_u16;
// TODO Loop on reads until, but catch EOF!!
if (signed_flag) {
switch (bytes) {
case 1:
res = fread(&d_8, bytes, 1, f);
*dd = d_8;
break;
case 2:
res = fread(&d_16, bytes, 1, f);
*dd = d_16;
break;
default:
fprintf(stderr, "Error: unsupported size %d bytes\n", bytes);
exit(1);
}
}
else { // unsigned
switch (bytes) {
case 1:
res = fread(&d_u8, bytes, 1, f);
*dd = d_u8;
break;
case 2:
res = fread(&d_u16, bytes, 1, f);
*dd = d_u16;
break;
default:
fprintf(stderr, "Error: unsupported size %d bytes\n", bytes);
exit(1);
}
}
if (res != 1) return(0);
else return(1);
}
/* Main */
int main(int argc, char *argv[]) {
char usage[] = "Usage: %s [-b size_in_bytes] [-c] [-s] [-t tolerance] [-n numerrorstoexit] file1 file2\n";
int bytes = 1;
int count_errors = 0;
int signed_flag = 0;
int tol = 1;
int numerrorstoexit = -1;
int opt;
while ((opt = getopt(argc, argv, "b:cst:n:")) != -1) {
switch (opt) {
case 'b':
bytes = atoi(optarg);
break;
case 'c':
count_errors = 1;
break;
case 's':
signed_flag = 1;
break;
case 'n':
numerrorstoexit = atoi(optarg);
break;
case 't':
tol = atof(optarg);
break;
default:
fprintf(stderr, usage, argv[0]);
exit(1);
}
}
if ((optind + 2) > argc) {
fprintf(stderr, usage, argv[0]);
exit(1);
}
char *fname1 = argv[optind++];
char *fname2 = argv[optind++];
FILE *f1 = fopen(fname1, "rb");
if (f1 == NULL) {
fprintf(stderr, "Error opening file1 \"%s\": ", fname1);
perror(NULL);
exit(1);
}
FILE *f2 = fopen(fname2, "rb");
if (f2 == NULL) {
fprintf(stderr, "Error opening file2 \"%s\": ", fname2);
perror(NULL);
exit(1);
}
// Convert inputs to SIGNED long values
int64_t data1, data2;
int count = 0;
int errors = 0;
int rms_sum = 0;
while (get_data(f1, &data1, signed_flag, bytes)) {
if (!get_data(f2, &data2, signed_flag, bytes)) {
fprintf(stderr, "Error: file2 is shorter\n");
exit(1);
}
uint64_t err = llabs(data1 - data2);
if (err > tol) {
errors ++;
printf("%d %" PRId64 " %" PRId64 "\n", count, data1, data2);
if (numerrorstoexit != -1)
if (errors > numerrorstoexit) {
printf("reached errors: %d, bailing!", numerrorstoexit);
exit(1);
}
}
rms_sum += (err * err);
count ++;
}
if (get_data(f2, &data2, signed_flag, bytes)) {
fprintf(stderr, "Error: file1 is shorter\n");
exit(1);
}
if (count_errors) exit(errors);
else {
if (errors) {
printf("Fail: %d errors\n", errors);
printf(" rms error = %f\n", ((double)rms_sum/count));
exit(1);
}
else printf("Pass\n");
exit(0);
}
} // main
/* vi:set ts=4 et sts=4: */
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