base64.h

C编写的用来实现search engine的推荐功能

/*******************************************
 * Base64编码、解码
 * 编码中可以指明每个若干个字符插入一个换行符
 * 解码时可以忽略其中的回车、换行符
 * Author: lubing
 * Date: Oct. 26, 2000
 *******************************************/
 
#ifndef _BASE64_H
#define _BASE64_H

#ifdef __cplusplus
extern "C" {
#endif

/***********************************
 * Encode a string.
 * IN:
 *   src:     the string to be encoded.
 *   srclen:  the length the content in src, so the function can process binany data.
 *   dest:    the buffer to store the result.
 *   destlen: the size of the buffer.
 *   wraplen: the characters number inteval a newline(\n) will be inserted.
 *            0 means no newline needed.
 * OUT:
 *   0: the buffer is too small to store the result.
 *   >0: the length of the result.
 ***********************************/
int Base64Encode(const char* src, const int srclen, char* dest, const int destlen, const int wraplen);
	
/***********************************
 * Decode a base64 string..
 * IN:
 *   src:     the string to be decoded. LF/CR will be discarded.
 *   dest:    the buffer to store the result.
 *   destlen: the size of the buffer.
 * OUT:
 *   0: the buffer is too small to store the result.
 *   >0: the length of the result.
 ***********************************/
int Base64Decode(const char* src, char* dest, const int destlen);

#ifdef __cplusplus
}
#endif

#endif