mirror of
git://git.sv.gnu.org/coreutils
synced 2026-05-19 21:21:58 -04:00
Jim Meyering
3b933f1e33
When decoding, always allow newlines in input, with almost no performance impact. * src/base64.c (do_decode): Initialize decode context. Call base64_decode one more time, after all input is processed. (usage): When decoding, newlines are always accepted. * tests/misc/base64: Add a bunch of tests, for the above. * gl/lib/base64.c: Include <string.h>. (base64_decode_ctx_init, get_4, decode_4): New functions. (base64_decode): Efficiently handle interspersed newlines. (base64_decode_alloc): Update signature. * gl/lib/base64.h (struct base64_decode_context): Define. (base64_decode_ctx_init): Add prototype. (base64_decode, base64_decode_alloc): Update prototypes. [doc/ChangeLog] * coreutils.texi (base64 invocation): When decoding, newlines are always accepted.
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* base64.h -- Encode binary data using printable characters.
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Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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Written by Simon Josefsson.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef BASE64_H
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# define BASE64_H
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/* Get size_t. */
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# include <stddef.h>
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/* Get bool. */
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# include <stdbool.h>
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/* This uses that the expression (n+(k-1))/k means the smallest
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integer >= n/k, i.e., the ceiling of n/k. */
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# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
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struct base64_decode_context
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{
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unsigned int i;
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char buf[4];
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};
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extern bool isbase64 (char ch);
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extern void base64_encode (const char *restrict in, size_t inlen,
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char *restrict out, size_t outlen);
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extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
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extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
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extern bool base64_decode (struct base64_decode_context *ctx,
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const char *restrict in, size_t inlen,
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char *restrict out, size_t *outlen);
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extern bool base64_decode_alloc (struct base64_decode_context *ctx,
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const char *in, size_t inlen,
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char **out, size_t *outlen);
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#endif /* BASE64_H */
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