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libstrfunc.c

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00001 
00002 /* Taken from LibStrfunc v7.3 */
00003 
00004 #include "define.h"
00005 
00006 
00007 static char base64_code_chars[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/==";
00008 
00009 void base64_append(char **ou, int *line_count, char data)
00010 {
00011     if (*line_count == 76) {
00012         *(*ou)++ = '\n';
00013         *line_count = 0;
00014     }
00015     *(*ou)++ = data;
00016     (*line_count)++;
00017 }
00018 
00019 
00020 char *base64_encode(void *data, size_t size)
00021 {
00022     int line_count = 0;
00023     return base64_encode_multiple(data, size, &line_count);
00024 }
00025 
00026 
00027 char *base64_encode_multiple(void *data, size_t size, int *line_count)
00028 {
00029     char *output;
00030     char *ou;
00031     unsigned char *p   = (unsigned char *)data;
00032     unsigned char *dte = p + size;
00033 
00034     if (data == NULL || size == 0) return NULL;
00035 
00036     ou = output = (char *)malloc(size / 3 * 4 + (size / 57) + 6);
00037     if (!output) return NULL;
00038 
00039     while((dte-p) >= 3) {
00040         unsigned char x = p[0];
00041         unsigned char y = p[1];
00042         unsigned char z = p[2];
00043         base64_append(&ou, line_count, base64_code_chars[ x >> 2 ]);
00044         base64_append(&ou, line_count, base64_code_chars[ ((x & 0x03) << 4) | (y >> 4) ]);
00045         base64_append(&ou, line_count, base64_code_chars[ ((y & 0x0F) << 2) | (z >> 6) ]);
00046         base64_append(&ou, line_count, base64_code_chars[ z & 0x3F ]);
00047         p+=3;
00048     };
00049     if ((dte-p) == 2) {
00050         base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]);
00051         base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) | (p[1] >> 4) ]);
00052         base64_append(&ou, line_count, base64_code_chars[ ((p[1] & 0x0F) << 2) ]);
00053         base64_append(&ou, line_count, '=');
00054     } else if ((dte-p) == 1) {
00055         base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]);
00056         base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) ]);
00057         base64_append(&ou, line_count, '=');
00058         base64_append(&ou, line_count, '=');
00059     };
00060 
00061     *ou=0;
00062     return output;
00063 };
00064 
00065 
00066 void hexdump(char *hbuf, int start, int stop, int ascii) /* {{{ HexDump all or a part of some buffer */
00067 {
00068     char c;
00069     int diff,i;
00070 
00071     while (start < stop ) {
00072         diff = stop - start;
00073         if (diff > 16) diff = 16;
00074 
00075         fprintf(stderr, ":%08X  ",start);
00076 
00077         for (i = 0; i < diff; i++) {
00078             if( 8 == i ) fprintf( stderr, " " );
00079             fprintf(stderr, "%02X ",(unsigned char)*(hbuf+start+i));
00080         }
00081         if (ascii) {
00082             for (i = diff; i < 16; i++) fprintf(stderr, "   ");
00083             for (i = 0; i < diff; i++) {
00084                 c = *(hbuf+start+i);
00085                 fprintf(stderr, "%c", isprint(c) ? c : '.');
00086             }
00087         }
00088         fprintf(stderr, "\n");
00089         start += 16;
00090     }
00091 }

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