diff options
Diffstat (limited to 'base64.c')
| -rw-r--r-- | base64.c | 83 |
1 files changed, 55 insertions, 28 deletions
diff --git a/base64.c b/base64.c index a69b7be..f159089 100644 --- a/base64.c +++ b/base64.c @@ -2,24 +2,17 @@ base64.c - by Joe DF (joedf@ahkscript.org) Released under the MIT License - Revision: 00:06 2014-09-22 + See "base64.h", for more information. Thank you for inspiration: http://www.codeproject.com/Tips/813146/Fast-base-functions-for-encode-decode */ - -unsigned int b64_int(unsigned int ch); -unsigned int b64e_size(unsigned int in_size); -unsigned int b64d_size(unsigned int in_size); -unsigned int b64_encode(const unsigned int* in, unsigned int in_len, unsigned char* out); -unsigned int b64_decode(const unsigned char* in, unsigned int in_len, unsigned int* out); - +#include "base64.h" //Base64 char table - used internally for encoding unsigned char b64_chr[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; -//Base64 char table function - used internally for decoding unsigned int b64_int(unsigned int ch) { // ASCII to base64_int @@ -30,44 +23,36 @@ unsigned int b64_int(unsigned int ch) { // 47 Slash (/) >> 63 // 61 Equal (=) >> 64~ if (ch==43) - return 62; + return 62; if (ch==47) - return 63; + return 63; if (ch==61) - return 64; + return 64; if ((ch>47) && (ch<58)) - return ch + 4; + return ch + 4; if ((ch>64) && (ch<91)) - return ch - 'A'; + return ch - 'A'; if ((ch>96) && (ch<123)) - return (ch - 'a') + 26; + return (ch - 'a') + 26; return 0; } -// in_size : the number bytes to be encoded. -// Returns the recommended memory size to be allocated for the output buffer excluding the null byte unsigned int b64e_size(unsigned int in_size) { // size equals 4*floor((1/3)*(in_size+2)); int i, j = 0; for (i=0;i<in_size;i++) { if (i % 3 == 0) - j += 1; + j += 1; } return (4*j); } -// in_size : the number bytes to be decoded. -// Returns the recommended memory size to be allocated for the output buffer excluding the null byte unsigned int b64d_size(unsigned int in_size) { return ((3*in_size)/4); } -// in : buffer of "raw" binary to be encoded. -// in_len : number of bytes to be encoded. -// out : pointer to buffer with enough memory, user is responsible for memory allocation, receives null-terminated string -// returns size of output including null byte unsigned int b64_encode(const unsigned int* in, unsigned int in_len, unsigned char* out) { unsigned int i=0, j=0, k=0, s[3]; @@ -101,10 +86,6 @@ unsigned int b64_encode(const unsigned int* in, unsigned int in_len, unsigned ch return k; } -// in : buffer of base64 string to be decoded. -// in_len : number of bytes to be decoded. -// out : pointer to buffer with enough memory, user is responsible for memory allocation, receives "raw" binary -// returns size of output excluding null byte unsigned int b64_decode(const unsigned char* in, unsigned int in_len, unsigned int* out) { unsigned int i=0, j=0, k=0, s[4]; @@ -129,3 +110,49 @@ unsigned int b64_decode(const unsigned char* in, unsigned int in_len, unsigned i return k; } + +unsigned int b64_encodef(char *InFile, char *OutFile) { + + FILE *pInFile = fopen(InFile,"rb"); + FILE *pOutFile = fopen(OutFile,"wb"); + if ( (pInFile==NULL) || (pOutFile==NULL) ) + return 0; + + unsigned int i=0, j=0, c=0, s[3]; + + while(c!=EOF) { + c=fgetc(pInFile); + if (c==EOF) + break; + s[j++]=c; + if (j==3) { + fputc(b64_chr[ s[0]>>2 ],pOutFile); + fputc(b64_chr[ ((s[0]&0x03)<<4)+((s[1]&0xF0)>>4) ],pOutFile); + fputc(b64_chr[ ((s[1]&0x0F)<<2)+((s[2]&0xC0)>>6) ],pOutFile); + fputc(b64_chr[ s[2]&0x3F ],pOutFile); + j=0; i+=4; + } + } + + if (j) { + if (j==1) + s[1] = 0; + fputc(b64_chr[ s[0]>>2 ],pOutFile); + fputc(b64_chr[ ((s[0]&0x03)<<4)+((s[1]&0xF0)>>4) ],pOutFile); + if (j==2) + fputc(b64_chr[ ((s[1]&0x0F)<<2) ],pOutFile); + else + fputc('=',pOutFile); + fputc('=',pOutFile); + } + + fclose(pInFile); + fclose(pOutFile); + + return i; +} +/* +unsigned int b64_decodef(char *InFile, char *OutFile) { + +} +*/ \ No newline at end of file |