#include int ceph_armor(char *dst, const char *src, const char *end); int ceph_unarmor(char *dst, const char *src, const char *end); /* * base64 encode/decode. */ static const char *pem_key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; static int encode_bits(int c) { return pem_key[c]; } static int decode_bits(char c) { if (c >= 'A' && c <= 'Z') return c - 'A'; if (c >= 'a' && c <= 'z') return c - 'a' + 26; if (c >= '0' && c <= '9') return c - '0' + 52; if (c == '+') return 62; if (c == '/') return 63; if (c == '=') return 0; /* just non-negative, please */ return -EINVAL; } int ceph_armor(char *dst, const char *src, const char *end) { int olen = 0; int line = 0; while (src < end) { unsigned char a, b, c; a = *src++; *dst++ = encode_bits(a >> 2); if (src < end) { b = *src++; *dst++ = encode_bits(((a & 3) << 4) | (b >> 4)); if (src < end) { c = *src++; *dst++ = encode_bits(((b & 15) << 2) | (c >> 6)); *dst++ = encode_bits(c & 63); } else { *dst++ = encode_bits((b & 15) << 2); *dst++ = '='; } } else { *dst++ = encode_bits(((a & 3) << 4)); *dst++ = '='; *dst++ = '='; } olen += 4; line += 4; if (line == 64) { line = 0; *(dst++) = '\n'; olen++; } } return olen; } int ceph_unarmor(char *dst, const char *src, const char *end) { int olen = 0; while (src < end) { int a, b, c, d; if (src[0] == '\n') { src++; continue; } if (src + 4 > end) return -EINVAL; a = decode_bits(src[0]); b = decode_bits(src[1]); c = decode_bits(src[2]); d = decode_bits(src[3]); if (a < 0 || b < 0 || c < 0 || d < 0) return -EINVAL; *dst++ = (a << 2) | (b >> 4); if (src[2] == '=') return olen + 1; *dst++ = ((b & 15) << 4) | (c >> 2); if (src[3] == '=') return olen + 2; *dst++ = ((c & 3) << 6) | d; olen += 3; src += 4; } return olen; } mentation/unshare.txt'>
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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 21:58:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 21:58:13 -0800
commite7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba (patch)
treef63906f41699c8e38af9d12b063e2ceab0286ef2 /Documentation/unshare.txt
parente34bac726d27056081d0250c0e173e4b155aa340 (diff)
parent868c97a846a73e937d835b09b8c885a69df50ec8 (diff)
Merge tag 'docs-4.10' of git://git.lwn.net/linuxHEADmaster
Pull documentation update from Jonathan Corbet: "These are the documentation changes for 4.10. It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ... and, of course, lots of typo fixes and small updates" * tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits) dma-buf: Extract dma-buf.rst Update Documentation/00-INDEX docs: 00-INDEX: document directories/files with no docs docs: 00-INDEX: remove non-existing entries docs: 00-INDEX: add missing entries for documentation files/dirs docs: 00-INDEX: consolidate process/ and admin-guide/ description scripts: add a script to check if Documentation/00-INDEX is sane Docs: change sh -> awk in REPORTING-BUGS Documentation/core-api/device_link: Add initial documentation core-api: remove an unexpected unident ppc/idle: Add documentation for powersave=off Doc: Correct typo, "Introdution" => "Introduction" Documentation/atomic_ops.txt: convert to ReST markup Documentation/local_ops.txt: convert to ReST markup Documentation/assoc_array.txt: convert to ReST markup docs-rst: parse-headers.pl: cleanup the documentation docs-rst: fix media cleandocs target docs-rst: media/Makefile: reorganize the rules docs-rst: media: build SVG from graphviz files docs-rst: replace bayer.png by a SVG image ...
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