可以把任何文件显示成文本，并且能够再转换回去的工具。

在上传文件十分痛苦的今天，显示成为文本的文件可以更加方便的发布在各类论坛上（百度贴吧支持）。

转换后文件大小将增大23.1%左右。（理论上可以达到14.3%，有空改改）

编码器代码：

#include <stdio.h>
#include <string.h>
#include <sys\stat.h>

unsigned buffer[3] = {0, 0, 0};
int curPos = 16;
int code;
int finish = 0;
int size;
void Encode(int x);
FILE *fIn, *fOut;

const int HIGHSTART = 0x81;
const int LOWSTART = 0x80;
const int LOWEND = 0xFE;

int main(int argc, char** argv)
{
	int i, j;
	char name[128];
	if(argc != 2)
		return 0;
	fIn = fopen(argv[1], "rb");
	if(fIn == NULL)
		return 0;
	struct stat st;
	if(stat(argv[1], &st) == 0)
		size = st.st_size;
	for(i = strlen(argv[1]); i >= 0; i--)
		if(argv[1][i] == '\\')
			break;
	for(j = i + 1; j <= strlen(argv[1]); j++)
		name[j - i - 1] = argv[1][j];
	argv[1][i + 1] = 0;

	fOut = fopen(strcat(strcat(argv[1], name), "-texualized.txt"), "w");
	if(fread(&buffer[1], 1, 1, fIn) != 1)
		return 0;
	fprintf(fOut, "%d\n%s\n", size, name);
	
	while(finish < 2)
	{
		if(feof(fIn) != 0)
			finish++, buffer[2] = 0;
		else
			fread(&buffer[2], 1, 1, fIn);
			
		curPos -= 8;
		if(curPos <= 8)
		{
			if(curPos <= 3)
			{
				code = (buffer[0] << (curPos + 5)) + (buffer[1] >> (3 - curPos));
				code &= 0x1FFF;
				Encode(code);
			}
			else
			{
				code = (buffer[0] << (curPos + 5)) + (buffer[1] << (curPos - 3)) + (buffer[2] >> (11 - curPos));
				code &= 0x1FFF;
				Encode(code);
			}
			curPos += 13;
		}
		buffer[0] = buffer[1];
		buffer[1] = buffer[2];
	}
	fclose(fIn);
	fclose(fOut);
	return 0;
}

void Encode(int x)
{
	int high, low;
	high = x / (LOWEND - LOWSTART) + HIGHSTART;
	low = x % (LOWEND- LOWSTART) + LOWSTART;
	fprintf(fOut, "%c%c", high, low);
}

解码器代码：

#include <stdio.h>
#include <string.h>

unsigned char buffer[3] = {0, 0, 0};
FILE *fIn, *fOut;
unsigned code;
int curPos = 0;
char tCh1, tCh2;
int size;

const int HIGHSTART = 0x81;
const int LOWSTART = 0x80;
const int LOWEND = 0xFE;

unsigned Decode(char high, char low);

int main(int argc, char** argv)
{
	char add[128];
	int i;
	unsigned char t;
	if(argc != 2)
		return 0;
	fIn = fopen(argv[1], "r");
	if(fIn == NULL)
		return 0;
	fscanf(fIn, "%d\n", &size);
	fgets(add, 1024, fIn);
	add[strlen(add) - 1] = 0;
	for(i = strlen(argv[1]); i >= 0; i--)
		if(argv[1][i] == '\\')
			break;
	argv[1][i + 1] = 0;
	fOut = fopen(strcat(argv[1], add), "wb");
	while(1)
	{
		if(fscanf(fIn, "%c%c", &tCh1, &tCh2) != 2)
			break;
		code = Decode(tCh1, tCh2);
		if(curPos <= 3)
		{
			t = 0;
			for(i = 0; i < 8  - curPos; i++)
				t = (t << 1) + 1;
			buffer[0] &= ~t;
			buffer[0] += code >> (curPos + 5);
			buffer[1] = (code << (3 - curPos)) & 0xFF;
		}
		else
		{
			t = 0;
			for(i = 0; i < 8 - curPos; i++)
				t = (t << 1) + 1;
			buffer[0] &= ~t;
			buffer[0] += code >> (curPos + 5);
			buffer[1] = (code >> (curPos - 3)) & 0xFF;
			buffer[2] = (code << (11 - curPos)) & 0xFF;
		}
		curPos += 13;
		while(curPos >= 8)
		{
			fwrite(&buffer[0], 1, 1, fOut);
			size--;
			if(size <= 0)
			{
				fclose(fIn);
				fclose(fOut);
				return 0;
			}
			buffer[0] = buffer[1], buffer[1] = buffer[2];
			curPos -= 8;
		}
	}
	return 0;
}

unsigned Decode(char high, char low)
{
	unsigned x;
	x = (high + 256 - HIGHSTART) * (LOWEND - LOWSTART) + (low + 256 - LOWSTART);
	return (x & 0x1FFF);
}

编码器下载地址：http://futurecode.qupan.com/6548257.html

解码器下载地址：http://futurecode.qupan.com/6548264.html

使用方法：将需要编码/解码的文件用鼠标拽到exe图标上即可