diff options
author | Anthony G. Basile <blueness@gentoo.org> | 2012-11-15 10:33:16 -0500 |
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committer | Anthony G. Basile <blueness@gentoo.org> | 2012-11-15 10:33:16 -0500 |
commit | 7d4a62f8c1404ed426500b97af03d4ef8d034a71 (patch) | |
tree | 2436cd4f0460a3a3d589875d4ffba55556f3c582 /src/shared/utf8.c | |
parent | 2944f347d087ff24ec808e4b70fe104a772a97a0 (diff) |
Isolation of udev code from remaining systemd
This commit is a first attempt to isolate the udev code from the
remaining code base. It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed. This is a sweeping commit which may easily have
missed needed code. Files can be retrieved by doing a checkout
from the previous commit:
git checkout 2944f347d0 -- <filename>
Diffstat (limited to 'src/shared/utf8.c')
-rw-r--r-- | src/shared/utf8.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/src/shared/utf8.c b/src/shared/utf8.c deleted file mode 100644 index 5f9f3c60c5..0000000000 --- a/src/shared/utf8.c +++ /dev/null @@ -1,286 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -/* This file is based on the GLIB utf8 validation functions. The - * original license text follows. */ - -/* gutf8.c - Operations on UTF-8 strings. - * - * Copyright (C) 1999 Tom Tromey - * Copyright (C) 2000 Red Hat, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#include <errno.h> -#include <stdlib.h> -#include <inttypes.h> -#include <string.h> -#include <stdbool.h> - -#include "utf8.h" - -#define FILTER_CHAR '_' - -static inline bool is_unicode_valid(uint32_t ch) { - - if (ch >= 0x110000) /* End of unicode space */ - return false; - if ((ch & 0xFFFFF800) == 0xD800) /* Reserved area for UTF-16 */ - return false; - if ((ch >= 0xFDD0) && (ch <= 0xFDEF)) /* Reserved */ - return false; - if ((ch & 0xFFFE) == 0xFFFE) /* BOM (Byte Order Mark) */ - return false; - - return true; -} - -static inline bool is_continuation_char(uint8_t ch) { - if ((ch & 0xc0) != 0x80) /* 10xxxxxx */ - return false; - return true; -} - -static inline void merge_continuation_char(uint32_t *u_ch, uint8_t ch) { - *u_ch <<= 6; - *u_ch |= ch & 0x3f; -} - -static bool is_unicode_control(uint32_t ch) { - - /* - 0 to ' '-1 is the C0 range. - DEL=0x7F, and DEL+1 to 0x9F is C1 range. - '\t' is in C0 range, but more or less harmless and commonly used. - */ - - return (ch < ' ' && ch != '\t') || - (0x7F <= ch && ch <= 0x9F); -} - -char* utf8_is_printable_n(const char* str, size_t length) { - uint32_t val = 0; - uint32_t min = 0; - const uint8_t *p; - - assert(str); - - for (p = (const uint8_t*) str; length; p++, length--) { - if (*p < 128) { - val = *p; - } else { - if ((*p & 0xe0) == 0xc0) { /* 110xxxxx two-char seq. */ - min = 128; - val = (uint32_t) (*p & 0x1e); - goto ONE_REMAINING; - } else if ((*p & 0xf0) == 0xe0) { /* 1110xxxx three-char seq.*/ - min = (1 << 11); - val = (uint32_t) (*p & 0x0f); - goto TWO_REMAINING; - } else if ((*p & 0xf8) == 0xf0) { /* 11110xxx four-char seq */ - min = (1 << 16); - val = (uint32_t) (*p & 0x07); - } else - goto error; - - p++; - length--; - if (!length || !is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - TWO_REMAINING: - p++; - length--; - if (!is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - ONE_REMAINING: - p++; - length--; - if (!is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - if (val < min) - goto error; - } - - if (is_unicode_control(val)) - goto error; - } - - return (char*) str; - -error: - return NULL; -} - -static char* utf8_validate(const char *str, char *output) { - uint32_t val = 0; - uint32_t min = 0; - const uint8_t *p, *last; - int size; - uint8_t *o; - - assert(str); - - o = (uint8_t*) output; - for (p = (const uint8_t*) str; *p; p++) { - if (*p < 128) { - if (o) - *o = *p; - } else { - last = p; - - if ((*p & 0xe0) == 0xc0) { /* 110xxxxx two-char seq. */ - size = 2; - min = 128; - val = (uint32_t) (*p & 0x1e); - goto ONE_REMAINING; - } else if ((*p & 0xf0) == 0xe0) { /* 1110xxxx three-char seq.*/ - size = 3; - min = (1 << 11); - val = (uint32_t) (*p & 0x0f); - goto TWO_REMAINING; - } else if ((*p & 0xf8) == 0xf0) { /* 11110xxx four-char seq */ - size = 4; - min = (1 << 16); - val = (uint32_t) (*p & 0x07); - } else - goto error; - - p++; - if (!is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - TWO_REMAINING: - p++; - if (!is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - ONE_REMAINING: - p++; - if (!is_continuation_char(*p)) - goto error; - merge_continuation_char(&val, *p); - - if (val < min) - goto error; - - if (!is_unicode_valid(val)) - goto error; - - if (o) { - memcpy(o, last, (size_t) size); - o += size; - } - - continue; - - error: - if (o) { - *o = FILTER_CHAR; - p = last; /* We retry at the next character */ - } else - goto failure; - } - - if (o) - o++; - } - - if (o) { - *o = '\0'; - return output; - } - - return (char*) str; - -failure: - return NULL; -} - -char* utf8_is_valid (const char *str) { - return utf8_validate(str, NULL); -} - -char* utf8_filter (const char *str) { - char *new_str; - - assert(str); - - new_str = malloc(strlen(str) + 1); - if (!new_str) - return NULL; - - return utf8_validate(str, new_str); -} - -char *ascii_is_valid(const char *str) { - const char *p; - - assert(str); - - for (p = str; *p; p++) - if ((unsigned char) *p >= 128) - return NULL; - - return (char*) str; -} - -char *ascii_filter(const char *str) { - const char *s; - char *r, *d; - size_t l; - - assert(str); - - l = strlen(str); - r = malloc(l + 1); - if (!r) - return NULL; - - for (s = str, d = r; *s; s++) - if ((unsigned char) *s < 128) - *(d++) = *s; - - *d = 0; - - return r; -} |