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mirror of https://github.com/fumiama/base16384.git synced 2026-06-16 02:50:24 +08:00

add v1 branch

This commit is contained in:
源文雨
2022-06-03 11:46:55 +08:00
parent 70a5125e48
commit 1cccc911ce
13 changed files with 127 additions and 1621 deletions

View File

@@ -1,225 +1,99 @@
#ifndef __cosmopolitan
//base16384.c
//MIT fumiama 20200416
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#ifdef _WIN32
#include <windows.h>
#else
#include <sys/mman.h>
#endif
#endif
#include "base16384.h"
#include "bitio.h"
#ifdef __cosmopolitan
#define get_file_size(filepath) ((off_t)GetFileSize(filepath))
#else
static off_t get_file_size(const char* filepath) {
struct stat statbuf;
return stat(filepath, &statbuf)?-1:statbuf.st_size;
}
#endif
#define HEAD 0x4E
BIT outbuf;
unsigned char buf[BUFSIZ/8*8+2];
char encbuf[BUFSIZ*1024/7*7];
char decbuf[BUFSIZ*1024/8*8+2];
static int encode_file(const char* input, const char* output) {
off_t inputsize;
FILE* fp = NULL;
FILE* fpo;
if(*(uint16_t*)input == *(uint16_t*)"-") { // read from stdin
inputsize = 0;
fp = stdin;
} else inputsize = get_file_size(input);
if(inputsize < 0) {
perror("Get file size error");
return 1;
}
fpo = (*(uint16_t*)output == *(uint16_t*)"-")?stdout:fopen(output, "wb");
if(!fpo) {
perror("Fopen output file error");
return 2;
}
if(!inputsize || inputsize > BUFSIZ*1024) { // stdin or big file, use encbuf & fread
inputsize = BUFSIZ*1024/7*7;
#ifdef _WIN32
}
#endif
if(!fp) fp = fopen(input, "rb");
if(!fp) {
perror("Fopen input file error");
return 3;
}
int outputsize = encode_len(inputsize)+16;
size_t cnt = 0;
fputc(0xFE, fpo);
fputc(0xFF, fpo);
while((cnt = fread(encbuf, sizeof(char), inputsize, fp))) {
int n = encode(encbuf, cnt, decbuf, outputsize);
if(fwrite(decbuf, n, 1, fpo) <= 0) {
perror("Write file error");
return 4;
}
}
/* 由操作系统负责释放资源
fclose(fpo);
fclose(fp);
以缩短程序运行时间 */
#ifndef _WIN32
} else { // small file, use mmap & fwrite
int fd = open(input, O_RDONLY);
if(fd <= 0) {
perror("Open input file error");
return 5;
}
char *input_file = mmap(NULL, (size_t)inputsize, PROT_READ, MAP_PRIVATE, fd, 0);
if(input_file == MAP_FAILED) {
perror("Map input file error");
return 6;
}
int outputsize = encode_len(inputsize)+16;
fputc(0xFE, fpo);
fputc(0xFF, fpo);
int n = encode(input_file, (int)inputsize, decbuf, outputsize);
if(fwrite(decbuf, n, 1, fpo) <= 0) {
perror("Write file error");
return 7;
}
munmap(input_file, (size_t)inputsize);
/* 由操作系统负责释放资源
fclose(fpo);
close(fd);
以缩短程序运行时间 */
}
#endif
return 0;
}
#define rm_head(fp) {\
int ch = fgetc(fp);\
if(ch == 0xFE) fgetc(fp);\
else rewind(fp);\
}
#define skip_offset(input_file) ((input_file[0]==(char)0xFE)?2:0)
static int is_next_end(FILE* fp) {
int ch = fgetc(fp);
if(ch == '=') return fgetc(fp);
ungetc(ch, fp);
return 0;
}
static int decode_file(const char* input, const char* output) {
off_t inputsize;
FILE* fp = NULL;
FILE* fpo;
if(*(uint16_t*)input == *(uint16_t*)"-") { // read from stdin
inputsize = 0;
fp = stdin;
} else inputsize = get_file_size(input);
if(inputsize < 0) {
perror("Get file size error");
return 1;
}
fpo = (*(uint16_t*)output == *(uint16_t*)"-")?stdout:fopen(output, "wb");
if(!fpo) {
perror("Fopen output file error");
return 2;
}
if(!inputsize || inputsize > BUFSIZ*1024) { // stdin or big file, use decbuf & fread
inputsize = BUFSIZ*1024/8*8;
#ifdef _WIN32
}
#endif
if(!fp) fp = fopen(input, "rb");
if(!fp) {
perror("Fopen input file error");
return 3;
}
int outputsize = decode_len(inputsize, 0)+16;
int cnt = 0;
int end = 0;
rm_head(fp);
while((cnt = fread(decbuf, sizeof(char), inputsize, fp))) {
if((end = is_next_end(fp))) {
decbuf[cnt++] = '=';
decbuf[cnt++] = end;
}
if(fwrite(encbuf, decode(decbuf, cnt, encbuf, outputsize), 1, fpo) <= 0) {
perror("Write file error");
return 4;
}
}
/* 由操作系统负责释放资源
fclose(fpo);
fclose(fp);
以缩短程序运行时间 */
#ifndef _WIN32
} else { // small file, use mmap & fwrite
int fd = open(input, O_RDONLY);
if(fd <= 0) {
perror("Open input file error");
return 5;
}
char *input_file = mmap(NULL, (size_t)inputsize, PROT_READ, MAP_PRIVATE, fd, 0);
if(input_file == MAP_FAILED) {
perror("Map input file error");
return 6;
}
int outputsize = decode_len(inputsize, 0)+16;
int off = skip_offset(input_file);
if(fwrite(encbuf, decode(input_file+off, inputsize-off, encbuf, outputsize), 1, fpo) <= 0) {
perror("Write file error");
return 7;
}
munmap(input_file, (size_t)inputsize);
/* 由操作系统负责释放资源
fclose(fpo);
close(fd);
以缩短程序运行时间 */
}
#endif
return 0;
}
#ifndef _WIN32
unsigned long get_start_ms() {
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return (ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
}
#endif
int main(int argc, char** argv) {
if(argc != 4) {
puts("Usage: -[e|d] <inputfile> <outputfile>");
puts("\t-e encode");
puts("\t-d decode");
puts("\t<inputfile> pass - to read from stdin");
puts("\t<outputfile> pass - to write to stdout");
exit(EXIT_SUCCESS);
static void push(int istrue, FILE *fpo, int offset){
if(!~pushbit(&outbuf, istrue)){
if(offset) for(int i = 0; i < BITBUFSIZE; i += 2) outbuf.b[i] += offset;
fwrite(outbuf.b, sizeof(char), BITBUFSIZE, fpo);
outbuf.p = 0;
pushbit(&outbuf, istrue);
}
#ifdef _WIN32
clock_t t = clock();
#else
unsigned long t = get_start_ms();
#endif
int exitstat = 0;
switch(argv[1][1]) {
case 'e': exitstat = encode_file(argv[2], argv[3]); break;
case 'd': exitstat = decode_file(argv[2], argv[3]); break;
default: break;
}
if(!exitstat && *(uint16_t*)(argv[3]) != *(uint16_t*)"-") {
#ifdef _WIN32
printf("spend time: %lums\n", clock() - t);
#else
printf("spend time: %lums\n", get_start_ms() - t);
#endif
}
return exitstat;
}
static void encode(FILE *fp, FILE *fpo){
int cnt, prevcnt;
fputc(0xFE, fpo);
fputc(0xFF, fpo);
while((cnt = fread(buf, sizeof(char), BUFSIZ/7*7, fp))){
prevcnt = cnt;
for(int i = 0; i < cnt * 8; i++){
if(!(outbuf.p % 16)){
push(0, fpo, HEAD);
push(0, fpo, HEAD);
}
push(buf[i / 8] & (128u >> (i % 8)), fpo, HEAD);
}
}
if(outbuf.p){
outbuf.b[outbuf.p / 8] &= ~(255u >> outbuf.p % 8);
for(int i = 0; i < outbuf.p / 8 + 1; i += 2) outbuf.b[i] += HEAD;
fwrite(outbuf.b, sizeof(char), (outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8 , fpo);
if(((outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8) % 2) fputc(0, fpo);
if(outbuf.p % 16) {
fputc('=', fpo);
fputc(prevcnt%7, fpo);
}
}
}
static uint8_t map[] = {0, 6, 12, 4, 10, 2, 8};
static void decode(FILE *fp, FILE *fpo){
int cnt;
int cnt8;
while((cnt = fread(buf, sizeof(char), BUFSIZ/8*8, fp))){
cnt8 = cnt * 8;
if(buf[cnt-2] == '=') {
cnt8 -= 2*8 + map[buf[cnt-1]&7];
} else if(cnt == BUFSIZ && !feof(fp)) {
int ch;
if((ch=fgetc(fp)) != '=') ungetc(ch, fp);
else cnt8 -= map[fgetc(fp)&7];
}
for(int i = ((buf[0] == 0xFE)?16:0); i < cnt8; i++){
if(!(i % 16)){
buf[i / 8] -= HEAD;
i += 2;
}
push(buf[i / 8] & (128u >> (i % 8)), fpo, 0);
}
}
if(outbuf.p) fwrite(outbuf.b, sizeof(char), (outbuf.p % 8)?outbuf.p / 8 + 1:outbuf.p / 8, fpo);
}
#define CHOICE argv[1][1]
#define READ argv[2]
#define WRITE argv[3]
int main(int argc, char **argv){
FILE *fp = NULL;
FILE *fpo = NULL;
if(argc != 4){
fputs("Usage: -[e|d] inputfile outputfile\n", stderr);
fputs(" -e encode\n", stderr);
fputs(" -d decode\n", stderr);
exit(EXIT_FAILURE);
}
fp = fopen(READ, "rb");
fpo = fopen(WRITE, "wb");
if(!fp || !fpo){
fputs("IO error!", stderr);
exit(EXIT_FAILURE);
}
switch(CHOICE){
case 'e': encode(fp, fpo); break;
case 'd': decode(fp, fpo); break;
default: break;
}
return 0;
}