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/**
* @file test_huff_code.c Test Huffman coding
* @author David Huggins-Daines <dhuggins@cs.cmu.edu>
*/
#include "huff_code.h"
#include "test_macros.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int32 const ivalues[10] = {
1, 2, 3, 5, 7, 11, 13, 17, 19, 23
};
int32 const frequencies[10] = {
42, 4, 5, 6, 225, 15001, 3, 2, 87, 1003
};
char * const svalues[10] = {
"foo", "bar", "baz", "quux", "argh",
"hurf", "burf", "blatz", "unf", "woof"
};
char * const svalues2[10] = {
"1","2","3","4","5","6","7","8","9","10"
};
char const cdata[7] = { 0x08, 0x30, 0x40, 0x4c, 0x00, 0x04, 0x50 };
void
test_intcode(huff_code_t *hc)
{
FILE *fh;
char const *dptr;
int i, offset;
size_t dlen;
int32 val;
fh = fopen("hufftest.out", "wb");
huff_code_attach(hc, fh, "wb");
for (i = 0; i < 10; ++i) {
huff_code_encode_int(hc, ivalues[i], NULL);
}
huff_code_detach(hc);
fclose(fh);
fh = fopen("hufftest.out", "rb");
huff_code_attach(hc, fh, "rb");
for (i = 0; i < 10; ++i) {
int32 val;
huff_code_decode_int(hc, &val, NULL, NULL, 0);
printf("%d ", val);
TEST_EQUAL(val, ivalues[i]);
}
printf("\n");
huff_code_detach(hc);
fclose(fh);
dptr = cdata;
dlen = 7;
offset = 0;
for (i = 0; i < 10; ++i) {
huff_code_decode_int(hc, &val, &dptr, &dlen, &offset);
printf("%d ", val);
TEST_EQUAL(val, ivalues[i]);
}
TEST_EQUAL(dlen, 1);
TEST_EQUAL(offset, 4);
printf("\n");
dptr = cdata;
dlen = 7;
offset = 0;
i = 0;
while (huff_code_decode_int(hc, &val, &dptr, &dlen, &offset) != -1) {
printf("%d ", val);
TEST_EQUAL(val, ivalues[i++]);
}
TEST_EQUAL(dlen, 1);
TEST_EQUAL(offset, 4);
printf("\n");
}
void
test_strcode(huff_code_t *hc, char * const *svalues)
{
FILE *fh;
char const *dptr;
int i, offset;
size_t dlen;
fh = fopen("hufftest.out", "wb");
huff_code_attach(hc, fh, "wb");
for (i = 9; i >= 0; --i) {
huff_code_encode_str(hc, svalues[i], NULL);
}
huff_code_detach(hc);
fclose(fh);
fh = fopen("hufftest.out", "rb");
huff_code_attach(hc, fh, "rb");
for (i = 9; i >= 0; --i) {
char const *val = huff_code_decode_str(hc, NULL, NULL, 0);
printf("%s ", val);
TEST_EQUAL(0, strcmp(val, svalues[i]));
}
printf("\n");
huff_code_detach(hc);
fclose(fh);
dptr = cdata;
dlen = 7;
offset = 0;
for (i = 0; i < 10; ++i) {
char const *val = huff_code_decode_str(hc, &dptr, &dlen, &offset);
printf("%s ", val);
TEST_EQUAL(0, strcmp(val, svalues[i]));
}
TEST_EQUAL(dlen, 1);
TEST_EQUAL(offset, 4);
printf("\n");
}
int
main(int argc, char *argv[])
{
huff_code_t *hc;
FILE *fh;
hc = huff_code_build_int(ivalues, frequencies, 10);
huff_code_dump(hc, stdout);
test_intcode(hc);
fh = fopen("huffcode.out", "wb");
huff_code_write(hc, fh);
fclose(fh);
huff_code_free(hc);
fh = fopen("huffcode.out", "rb");
hc = huff_code_read(fh);
fclose(fh);
test_intcode(hc);
huff_code_free(hc);
hc = huff_code_build_str(svalues, frequencies, 10);
huff_code_dump(hc, stdout);
test_strcode(hc, svalues);
fh = fopen("huffcode.out", "wb");
huff_code_write(hc, fh);
fclose(fh);
huff_code_free(hc);
fh = fopen("huffcode.out", "rb");
hc = huff_code_read(fh);
fclose(fh);
test_strcode(hc, svalues);
huff_code_free(hc);
hc = huff_code_build_str(svalues2, frequencies, 10);
huff_code_dump(hc, stdout);
test_strcode(hc, svalues2);
huff_code_free(hc);
return 0;
}
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