Remove file produced by Makefile.
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src/base64u.c
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src/base64u.c
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/* No use in editing, produced by Makefile! */
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/*
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* Copyright (c) 2006-2009 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
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* Mostly rewritten 2009 J.A.Bezemer@opensourcepartners.nl
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "encoding.h"
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#include "base64u.h"
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#define BLKSIZE_RAW 3
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#define BLKSIZE_ENC 4
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/* Note: the "unofficial" char is last here, which means that the \377 pattern
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in DOWNCODECCHECK1 ('Y' request) will properly test it. */
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static const char cb64[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-0123456789_";
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static unsigned char rev64[256];
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static int reverse_init = 0;
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static int base64u_encode(char *, size_t *, const void *, size_t);
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static int base64u_decode(void *, size_t *, const char *, size_t);
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static int base64u_handles_dots();
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static int base64u_blksize_raw();
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static int base64u_blksize_enc();
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static struct encoder base64u_encoder =
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{
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"Base64u",
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base64u_encode,
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base64u_decode,
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base64u_handles_dots,
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base64u_handles_dots,
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base64u_blksize_raw,
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base64u_blksize_enc
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};
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struct encoder
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*get_base64u_encoder(void)
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{
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return &base64u_encoder;
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}
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static int
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base64u_handles_dots(void)
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{
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return 0;
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}
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static int
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base64u_blksize_raw(void)
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{
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return BLKSIZE_RAW;
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}
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static int
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base64u_blksize_enc(void)
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{
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return BLKSIZE_ENC;
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}
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inline static void
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base64u_reverse_init(void)
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{
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unsigned char c;
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if (!reverse_init) {
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memset (rev64, 0, 256);
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for (int i = 0; i < 64; i++) {
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c = cb64[i];
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rev64[(int) c] = i;
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}
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reverse_init = 1;
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}
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}
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static int
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base64u_encode(char *buf, size_t *buflen, const void *data, size_t size)
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/*
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* Fills *buf with max. *buflen characters, encoding size bytes of *data.
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*
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* NOTE: *buf space should be at least 1 byte _more_ than *buflen
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* to hold the trailing '\0'.
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*
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* return value : #bytes filled in buf (excluding \0)
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* sets *buflen to : #bytes encoded from data
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*/
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{
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unsigned char *udata = (unsigned char *) data;
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int iout = 0; /* to-be-filled output char */
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int iin = 0; /* one more than last input byte that can be
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successfully decoded */
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/* Note: Don't bother to optimize manually. GCC optimizes
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better(!) when using simplistic array indexing. */
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while (1) {
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if (iout >= *buflen || iin >= size)
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break;
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buf[iout] = cb64[((udata[iin] & 0xfc) >> 2)];
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iout++;
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if (iout >= *buflen || iin >= size) {
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iout--; /* previous char is useless */
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break;
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}
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buf[iout] = cb64[((udata[iin] & 0x03) << 4) |
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((iin + 1 < size) ?
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((udata[iin + 1] & 0xf0) >> 4) : 0)];
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iin++; /* 0 complete, iin=1 */
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iout++;
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if (iout >= *buflen || iin >= size)
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break;
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buf[iout] = cb64[((udata[iin] & 0x0f) << 2 ) |
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((iin + 1 < size) ?
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((udata[iin + 1] & 0xc0) >> 6) : 0)];
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iin++; /* 1 complete, iin=2 */
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iout++;
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if (iout >= *buflen || iin >= size)
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break;
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buf[iout] = cb64[(udata[iin] & 0x3f)];
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iin++; /* 2 complete, iin=3 */
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iout++;
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}
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buf[iout] = '\0';
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/* store number of bytes from data that was used */
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*buflen = iin;
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return iout;
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}
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#define REV64(x) rev64[(int) (x)]
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static int
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base64u_decode(void *buf, size_t *buflen, const char *str, size_t slen)
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/*
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* Fills *buf with max. *buflen bytes, decoded from slen chars in *str.
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* Decoding stops early when *str contains \0.
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* Illegal encoded chars are assumed to decode to zero.
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*
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* NOTE: *buf space should be at least 1 byte _more_ than *buflen
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* to hold a trailing '\0' that is added (though *buf will usually
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* contain full-binary data).
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*
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* return value : #bytes filled in buf (excluding \0)
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*/
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{
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unsigned char *ubuf = (unsigned char *) buf;
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int iout = 0; /* to-be-filled output byte */
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int iin = 0; /* next input char to use in decoding */
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base64u_reverse_init ();
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/* Note: Don't bother to optimize manually. GCC optimizes
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better(!) when using simplistic array indexing. */
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while (1) {
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if (iout >= *buflen || iin + 1 >= slen ||
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str[iin] == '\0' || str[iin + 1] == '\0')
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break;
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ubuf[iout] = ((REV64(str[iin]) & 0x3f) << 2) |
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((REV64(str[iin + 1]) & 0x30) >> 4);
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iin++; /* 0 used up, iin=1 */
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iout++;
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if (iout >= *buflen || iin + 1 >= slen ||
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str[iin] == '\0' || str[iin + 1] == '\0')
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break;
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ubuf[iout] = ((REV64(str[iin]) & 0x0f) << 4) |
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((REV64(str[iin + 1]) & 0x3c) >> 2);
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iin++; /* 1 used up, iin=2 */
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iout++;
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if (iout >= *buflen || iin + 1 >= slen ||
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str[iin] == '\0' || str[iin + 1] == '\0')
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break;
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ubuf[iout] = ((REV64(str[iin]) & 0x03) << 6) |
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(REV64(str[iin + 1]) & 0x3f);
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iin += 2; /* 2,3 used up, iin=4 */
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iout++;
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}
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ubuf[iout] = '\0';
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return iout;
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}
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