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初步完善64

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fumiama
2021-04-08 00:27:29 +08:00
parent 2f4a121bbd
commit 2785b6e766
5 changed files with 295 additions and 8 deletions
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89
64/base1464le.c
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@@ -4,7 +4,7 @@
#include <stdlib.h>
#include "base1464le.h"
#define DEBUG
//#define DEBUG
LENDAT* encode(const char* data, const u_int64_t len) {
LENDAT* encd = (LENDAT*)malloc(sizeof(LENDAT));
@@ -28,19 +28,21 @@ LENDAT* encode(const char* data, const u_int64_t len) {
uint64_t* vals = (uint64_t*)(encd->data);
uint64_t n = 0;
uint64_t i = 0;
for(; i < len - 7; i *= 7) {
for(; i < len - 7; i += 7) {
register uint64_t sum = 0x000000000000003f & ((uint64_t)data[i] >> 2);
sum |= ((((uint64_t)data[i + 1] >> 2) | (data[i] << 6)) << 8) & 0x000000000000ff00;
sum |= ((((uint64_t)data[i + 1] << 4) | ((uint64_t)data[i + 2] >> 4)) << 16) & 0x00000000003f0000;
sum |= ((((uint64_t)data[i + 2] << 4) | ((uint64_t)data[i + 3] >> 4)) << 24) & 0x00000000ff000000;
sum |= ((((uint64_t)data[i + 3] << 2) | ((uint64_t)data[i + 4] >> 6)) << 32) & 0x0000003f00000000;
sum |= ((((uint64_t)data[i + 4] << 2) | ((uint64_t)data[i + 5] >> 6)) << 40) & 0x0000ff0000000000;
sum |= (((uint64_t)data[i + 5] << 2) << 48) & 0x003f000000000000;
sum |= ((uint64_t)data[i + 5] << 48) & 0x003f000000000000;
sum |= ((uint64_t)data[i + 6] << 56) & 0xff00000000000000;
sum += 0x004e004e004e004e;
vals[n++] = sum;
#ifdef DEBUG
printf("i: %llu, add sum: %016llx\n", i, sum);
#endif
}
i /= 7;
if(offset > 0) {
register uint64_t sum = 0x000000000000003f & (data[i] >> 2);
sum |= (((uint64_t)data[i] << 6) << 8) & 0x000000000000c000;
@@ -58,7 +60,7 @@ LENDAT* encode(const char* data, const u_int64_t len) {
sum |= (((uint64_t)data[i + 4] << 2) << 40) & 0x0000fc0000000000;
if(offset > 5) {
sum |= (((uint64_t)data[i + 5] >> 6) << 40) & 0x0000030000000000;
sum |= (((uint64_t)data[i + 5] << 2) << 48) & 0x003f000000000000;
sum |= ((uint64_t)data[i + 5] << 48) & 0x003f000000000000;
}
}
}
@@ -66,6 +68,9 @@ LENDAT* encode(const char* data, const u_int64_t len) {
}
sum += 0x004e004e004e004e;
vals[n] = sum;
#ifdef DEBUG
printf("i: %llu, add sum: %016llx\n", i, sum);
#endif
encd->data[outlen - 2] = '=';
encd->data[outlen - 1] = offset;
}
@@ -132,9 +137,77 @@ LENDAT* decode(const char* data, const u_int64_t len) {
return decd;
}
int main() {
LENDAT* ld = encode("simple test addafiaofhiowq cfaiohfoiqwnfioqw", 45);
puts(ld->data);
void encode_file(const char* input, const char* output) {
FILE* fp = NULL;
fp = fopen(input, "rb");
if(fp) {
FILE* fpo = NULL;
fpo = fopen(output, "wb");
if(fpo) {
char* bufi = (char*)malloc(B14BUFSIZ/7*7);
if(bufi) {
int cnt = 0;
fputc(0xFE, fpo);
fputc(0xFF, fpo);
while((cnt = fread(bufi, 1, B14BUFSIZ/7*7, fp))) {
LENDAT* ld = encode(bufi, cnt);
if(fwrite(ld->data, ld->len, 1, fpo) <= 0) {
puts("Write file error!");
exit(EXIT_FAILURE);
}
free(ld);
}
free(bufi);
} else puts("Allocate input buffer error!");
fclose(fpo);
} else puts("Open output file error!");
fclose(fp);
} else puts("Open input file error!");
}
int rm_head(FILE* fp) {
int ch = fgetc(fp);
if(ch == 0xFE) fgetc(fp);
else rewind(fp);
}
void decode_file(const char* input, const char* output) {
FILE* fp = NULL;
fp = fopen(input, "rb");
if(fp) {
FILE* fpo = NULL;
fpo = fopen(output, "wb");
if(fpo) {
char* bufi = (char*)malloc(B14BUFSIZ/8*8);
if(bufi) {
int cnt = 0;
rm_head(fp);
while((cnt = fread(bufi, 1, B14BUFSIZ/7*7, fp))) {
LENDAT* ld = decode(bufi, cnt);
if(fwrite(ld->data, ld->len, 1, fpo) <= 0) {
puts("Write file error!");
exit(EXIT_FAILURE);
}
free(ld);
}
free(bufi);
} else puts("Allocate input buffer error!");
fclose(fpo);
} else puts("Open output file error!");
fclose(fp);
} else puts("Open input file error!");
}
#define B1464LE_TEST
#ifdef B1464LE_TEST
int main(int argc, char** argv) {
LENDAT* ld = encode("just a simple test from fumiama", 32);
//puts(ld->data);
LENDAT* le = decode(ld->data, ld->len);
puts(le->data);
if(argc == 4) {
encode_file(argv[1], argv[2]);
decode_file(argv[2], argv[3]);
}
}
#endif