fumiama/base16384
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新的设计，速度快很多

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fumiama
2021-04-08 15:34:32 +08:00
parent 2785b6e766
commit 963abc1ec3
13 changed files with 355 additions and 305 deletions
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83
64/base1464le.c
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@@ -1,4 +1,4 @@
//basex64.c
//base1464le.c
//fumiama 20210407
#include <stdio.h>
#include <stdlib.h>
@@ -6,7 +6,7 @@
//#define DEBUG
LENDAT* encode(const char* data, const u_int64_t len) {
LENDAT* encode(const uint8_t* data, const u_int64_t len) {
LENDAT* encd = (LENDAT*)malloc(sizeof(LENDAT));
uint64_t outlen = len / 7 * 8;
uint8_t offset = len % 7;
@@ -28,7 +28,7 @@ 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; 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;
@@ -77,7 +77,7 @@ LENDAT* encode(const char* data, const u_int64_t len) {
return encd;
}
LENDAT* decode(const char* data, const u_int64_t len) {
LENDAT* decode(const uint8_t* data, const u_int64_t len) {
LENDAT* decd = (LENDAT*)malloc(sizeof(LENDAT));
uint64_t outlen = len;
uint8_t offset = 0;
@@ -136,78 +136,3 @@ LENDAT* decode(const char* data, const u_int64_t len) {
}
return decd;
}
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