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| # Changelog | ||
| ======= | ||
| ### 1.0b18 | ||
| Bugfix: | ||
| - Fixed base64 image encoding. | ||
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| ### 1.0b17 | ||
| Bugfix: | ||
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| The MIT License (MIT) | ||
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| Copyright (c) 2014 Little Star Media, Inc. | ||
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| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
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| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
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| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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| b64.c | ||
| ===== | ||
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| Base64 encode/decode | ||
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| ## install | ||
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| ```sh | ||
| $ clib install littlstar/b64.c | ||
| ``` | ||
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| ## usage | ||
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| ```c | ||
| #include <b64/b64.h> | ||
| ``` | ||
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| or | ||
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| ```c | ||
| #include <b64.h> | ||
| ``` | ||
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| ```c | ||
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| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <stdlib.h> | ||
| #include "b64.h" | ||
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| int | ||
| main (void) { | ||
| unsigned char *str = "brian the monkey and bradley the kinkajou are friends"; | ||
| char *enc = b64_encode(str, strlen(str)); | ||
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| printf("%s\n", enc); // YnJpYW4gdGhlIG1vbmtleSBhbmQgYnJhZGxleSB0aGUga2lua2Fqb3UgYXJlIGZyaWVuZHM= | ||
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| char *dec = b64_decode(enc, strlen(enc)); | ||
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| printf("%s\n", dec); // brian the monkey and bradley the kinkajou are friends | ||
| free(enc); | ||
| free(dec); | ||
| return 0; | ||
| } | ||
| ``` | ||
| ## api | ||
| Base64 index table | ||
| ```c | ||
| static const char b64_table[] = { | ||
| 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', | ||
| 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', | ||
| 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', | ||
| 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', | ||
| 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', | ||
| 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', | ||
| 'w', 'x', 'y', 'z', '0', '1', '2', '3', | ||
| '4', '5', '6', '7', '8', '9', '+', '/' | ||
| }; | ||
| ``` | ||
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| Encode `unsigned char *` source with `size_t` size. | ||
| Returns a `char *` base64 encoded string | ||
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| ```c | ||
| char * | ||
| b64_encode (const unsigned char *, size_t); | ||
| ``` | ||
| Decode `char *` source with `size_t` size. | ||
| Returns a `unsigned char *` base64 decoded string | ||
| ```c | ||
| unsigned char * | ||
| b64_decode (const char *, size_t); | ||
| ``` | ||
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| ## license | ||
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| MIT |
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| /** | ||
| * `b64.h' - b64 | ||
| * | ||
| * copyright (c) 2014 joseph werle | ||
| */ | ||
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| #ifndef B64_H | ||
| #define B64_H 1 | ||
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| /** | ||
| * Memory allocation functions to use. You can define b64_malloc and | ||
| * b64_realloc to custom functions if you want. | ||
| */ | ||
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| #ifndef b64_malloc | ||
| # define b64_malloc(ptr) malloc(ptr) | ||
| #endif | ||
| #ifndef b64_realloc | ||
| # define b64_realloc(ptr, size) realloc(ptr, size) | ||
| #endif | ||
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| // How much memory to allocate per buffer | ||
| #define B64_BUFFER_SIZE (1024 * 64) // 64K | ||
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| // Start buffered memory | ||
| char* b64_buf_malloc(void); | ||
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| // Update memory size. Returns the same pointer if we | ||
| // have enough space in the buffer. Otherwise, we add | ||
| // additional buffers. | ||
| char* b64_buf_realloc(unsigned char* ptr, size_t size); | ||
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| /** | ||
| * Base64 index table. | ||
| */ | ||
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| static const char b64_table[] = { | ||
| 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', | ||
| 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', | ||
| 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', | ||
| 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', | ||
| 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', | ||
| 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', | ||
| 'w', 'x', 'y', 'z', '0', '1', '2', '3', | ||
| '4', '5', '6', '7', '8', '9', '+', '/' | ||
| }; | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| /** | ||
| * Encode `unsigned char *' source with `size_t' size. | ||
| * Returns a `char *' base64 encoded string. | ||
| */ | ||
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| char * | ||
| b64_encode (const unsigned char *, size_t); | ||
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| /** | ||
| * Decode `char *' source with `size_t' size. | ||
| * Returns a `unsigned char *' base64 decoded string. | ||
| */ | ||
| unsigned char * | ||
| b64_decode (const char *, size_t); | ||
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| /** | ||
| * Decode `char *' source with `size_t' size. | ||
| * Returns a `unsigned char *' base64 decoded string + size of decoded string. | ||
| */ | ||
| unsigned char * | ||
| b64_decode_ex (const char *, size_t, size_t *); | ||
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| #ifdef __cplusplus | ||
| } | ||
| #endif | ||
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| #endif |
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| #include <stdlib.h> | ||
| #include <ctype.h> | ||
| #include "b64.h" | ||
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| #ifdef b64_USE_CUSTOM_MALLOC | ||
| extern void* b64_malloc(size_t); | ||
| #endif | ||
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| #ifdef b64_USE_CUSTOM_REALLOC | ||
| extern void* b64_realloc(void*, size_t); | ||
| #endif | ||
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| // The number of buffers we need | ||
| int bufc = 0; | ||
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| char* b64_buf_malloc() | ||
| { | ||
| char* buf = b64_malloc(B64_BUFFER_SIZE); | ||
| bufc = 1; | ||
| return buf; | ||
| } | ||
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| char* b64_buf_realloc(unsigned char* ptr, size_t size) | ||
| { | ||
| if (size > bufc * B64_BUFFER_SIZE) | ||
| { | ||
| while (size > bufc * B64_BUFFER_SIZE) bufc++; | ||
| char* buf = b64_realloc(ptr, B64_BUFFER_SIZE * bufc); | ||
| if (!buf) return NULL; | ||
| return buf; | ||
| } | ||
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| return ptr; | ||
| } |
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