^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * linux/fs/hfs/string.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 1995-1997 Paul H. Hargrove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * (C) 2003 Ardis Technologies <roman@ardistech.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This file may be distributed under the terms of the GNU General Public License.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This file contains the string comparison function for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Macintosh character set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * The code in this file is derived from code which is copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * 1986, 1989, 1990 by Abacus Research and Development, Inc. (ARDI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * It is used here by the permission of ARDI's president Cliff Matthews.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "hfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/dcache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /*================ File-local variables ================*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * unsigned char caseorder[]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Defines the lexical ordering of characters on the Macintosh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * Composition of the 'casefold' and 'order' tables from ARDI's code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * with the entry for 0x20 changed to match that for 0xCA to remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * special case for those two characters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static unsigned char caseorder[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 0x20,0x22,0x23,0x28,0x29,0x2A,0x2B,0x2C,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,0x36,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,0x45,0x46,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 0x47,0x48,0x57,0x59,0x5D,0x5F,0x66,0x68,0x6A,0x6C,0x72,0x74,0x76,0x78,0x7A,0x7E,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 0x8C,0x8E,0x90,0x92,0x95,0x97,0x9E,0xA0,0xA2,0xA4,0xA7,0xA9,0xAA,0xAB,0xAC,0xAD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 0x4E,0x48,0x57,0x59,0x5D,0x5F,0x66,0x68,0x6A,0x6C,0x72,0x74,0x76,0x78,0x7A,0x7E,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 0x8C,0x8E,0x90,0x92,0x95,0x97,0x9E,0xA0,0xA2,0xA4,0xA7,0xAF,0xB0,0xB1,0xB2,0xB3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 0x4A,0x4C,0x5A,0x60,0x7B,0x7F,0x98,0x4F,0x49,0x51,0x4A,0x4B,0x4C,0x5A,0x60,0x63,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 0x64,0x65,0x6E,0x6F,0x70,0x71,0x7B,0x84,0x85,0x86,0x7F,0x80,0x9A,0x9B,0x9C,0x98,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0x94,0xBB,0xBC,0xBD,0xBE,0xBF,0xC0,0x4D,0x81,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0x55,0x8A,0xCC,0x4D,0x81,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0x26,0x27,0xD4,0x20,0x49,0x4B,0x80,0x82,0x82,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 0xD5,0xD6,0x24,0x25,0x2D,0x2E,0xD7,0xD8,0xA6,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /*================ Global functions ================*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Hash a string to an integer in a case-independent way
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int hfs_hash_dentry(const struct dentry *dentry, struct qstr *this)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) const unsigned char *name = this->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned int hash, len = this->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (len > HFS_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) len = HFS_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) hash = init_name_hash(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) for (; len; len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) hash = partial_name_hash(caseorder[*name++], hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) this->hash = end_name_hash(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * Compare two strings in the HFS filename character ordering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * Returns positive, negative, or zero, not just 0 or (+/-)1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * Equivalent to ARDI's call:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * ROMlib_RelString(s1+1, s2+1, true, false, (s1[0]<<16) | s2[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int hfs_strcmp(const unsigned char *s1, unsigned int len1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) const unsigned char *s2, unsigned int len2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int len, tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) len = (len1 > len2) ? len2 : len1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) while (len--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) tmp = (int)caseorder[*(s1++)] - (int)caseorder[*(s2++)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return len1 - len2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * Test for equality of two strings in the HFS filename character ordering.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * return 1 on failure and 0 on success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) int hfs_compare_dentry(const struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned int len, const char *str, const struct qstr *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) const unsigned char *n1, *n2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (len >= HFS_NAMELEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (name->len < HFS_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) len = HFS_NAMELEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) } else if (len != name->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) n1 = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) n2 = name->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) while (len--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (caseorder[*n1++] != caseorder[*n2++])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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