Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
new file mode 100644
index 0000000..060c690
--- /dev/null
+++ b/fs/hfsplus/unicode.c
@@ -0,0 +1,271 @@
+/*
+ * linux/fs/hfsplus/unicode.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Handler routines for unicode strings
+ */
+
+#include <linux/types.h>
+#include <linux/nls.h>
+#include "hfsplus_fs.h"
+#include "hfsplus_raw.h"
+
+/* Fold the case of a unicode char, given the 16 bit value */
+/* Returns folded char, or 0 if ignorable */
+static inline u16 case_fold(u16 c)
+{
+ u16 tmp;
+
+ tmp = hfsplus_case_fold_table[c >> 8];
+ if (tmp)
+ tmp = hfsplus_case_fold_table[tmp + (c & 0xff)];
+ else
+ tmp = c;
+ return tmp;
+}
+
+/* Compare unicode strings, return values like normal strcmp */
+int hfsplus_unistrcmp(const struct hfsplus_unistr *s1, const struct hfsplus_unistr *s2)
+{
+ u16 len1, len2, c1, c2;
+ const hfsplus_unichr *p1, *p2;
+
+ len1 = be16_to_cpu(s1->length);
+ len2 = be16_to_cpu(s2->length);
+ p1 = s1->unicode;
+ p2 = s2->unicode;
+
+ while (1) {
+ c1 = c2 = 0;
+
+ while (len1 && !c1) {
+ c1 = case_fold(be16_to_cpu(*p1));
+ p1++;
+ len1--;
+ }
+ while (len2 && !c2) {
+ c2 = case_fold(be16_to_cpu(*p2));
+ p2++;
+ len2--;
+ }
+
+ if (c1 != c2)
+ return (c1 < c2) ? -1 : 1;
+ if (!c1 && !c2)
+ return 0;
+ }
+}
+
+#define Hangul_SBase 0xac00
+#define Hangul_LBase 0x1100
+#define Hangul_VBase 0x1161
+#define Hangul_TBase 0x11a7
+#define Hangul_SCount 11172
+#define Hangul_LCount 19
+#define Hangul_VCount 21
+#define Hangul_TCount 28
+#define Hangul_NCount (Hangul_VCount * Hangul_TCount)
+
+
+static u16 *hfsplus_compose_lookup(u16 *p, u16 cc)
+{
+ int i, s, e;
+
+ s = 1;
+ e = p[1];
+ if (!e || cc < p[s * 2] || cc > p[e * 2])
+ return NULL;
+ do {
+ i = (s + e) / 2;
+ if (cc > p[i * 2])
+ s = i + 1;
+ else if (cc < p[i * 2])
+ e = i - 1;
+ else
+ return hfsplus_compose_table + p[i * 2 + 1];
+ } while (s <= e);
+ return NULL;
+}
+
+int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, char *astr, int *len_p)
+{
+ const hfsplus_unichr *ip;
+ struct nls_table *nls = HFSPLUS_SB(sb).nls;
+ u8 *op;
+ u16 cc, c0, c1;
+ u16 *ce1, *ce2;
+ int i, len, ustrlen, res, compose;
+
+ op = astr;
+ ip = ustr->unicode;
+ ustrlen = be16_to_cpu(ustr->length);
+ len = *len_p;
+ ce1 = NULL;
+ compose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE);
+
+ while (ustrlen > 0) {
+ c0 = be16_to_cpu(*ip++);
+ ustrlen--;
+ /* search for single decomposed char */
+ if (likely(compose))
+ ce1 = hfsplus_compose_lookup(hfsplus_compose_table, c0);
+ if (ce1 && (cc = ce1[0])) {
+ /* start of a possibly decomposed Hangul char */
+ if (cc != 0xffff)
+ goto done;
+ if (!ustrlen)
+ goto same;
+ c1 = be16_to_cpu(*ip) - Hangul_VBase;
+ if (c1 < Hangul_VCount) {
+ /* compose the Hangul char */
+ cc = (c0 - Hangul_LBase) * Hangul_VCount;
+ cc = (cc + c1) * Hangul_TCount;
+ cc += Hangul_SBase;
+ ip++;
+ ustrlen--;
+ if (!ustrlen)
+ goto done;
+ c1 = be16_to_cpu(*ip) - Hangul_TBase;
+ if (c1 > 0 && c1 < Hangul_TCount) {
+ cc += c1;
+ ip++;
+ ustrlen--;
+ }
+ goto done;
+ }
+ }
+ while (1) {
+ /* main loop for common case of not composed chars */
+ if (!ustrlen)
+ goto same;
+ c1 = be16_to_cpu(*ip);
+ if (likely(compose))
+ ce1 = hfsplus_compose_lookup(hfsplus_compose_table, c1);
+ if (ce1)
+ break;
+ switch (c0) {
+ case 0:
+ c0 = 0x2400;
+ break;
+ case '/':
+ c0 = ':';
+ break;
+ }
+ res = nls->uni2char(c0, op, len);
+ if (res < 0) {
+ if (res == -ENAMETOOLONG)
+ goto out;
+ *op = '?';
+ res = 1;
+ }
+ op += res;
+ len -= res;
+ c0 = c1;
+ ip++;
+ ustrlen--;
+ }
+ ce2 = hfsplus_compose_lookup(ce1, c0);
+ if (ce2) {
+ i = 1;
+ while (i < ustrlen) {
+ ce1 = hfsplus_compose_lookup(ce2, be16_to_cpu(ip[i]));
+ if (!ce1)
+ break;
+ i++;
+ ce2 = ce1;
+ }
+ if ((cc = ce2[0])) {
+ ip += i;
+ ustrlen -= i;
+ goto done;
+ }
+ }
+ same:
+ switch (c0) {
+ case 0:
+ cc = 0x2400;
+ break;
+ case '/':
+ cc = ':';
+ break;
+ default:
+ cc = c0;
+ }
+ done:
+ res = nls->uni2char(cc, op, len);
+ if (res < 0) {
+ if (res == -ENAMETOOLONG)
+ goto out;
+ *op = '?';
+ res = 1;
+ }
+ op += res;
+ len -= res;
+ }
+ res = 0;
+out:
+ *len_p = (char *)op - astr;
+ return res;
+}
+
+int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, const char *astr, int len)
+{
+ struct nls_table *nls = HFSPLUS_SB(sb).nls;
+ int size, off, decompose;
+ wchar_t c;
+ u16 outlen = 0;
+
+ decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE);
+
+ while (outlen < HFSPLUS_MAX_STRLEN && len > 0) {
+ size = nls->char2uni(astr, len, &c);
+ if (size <= 0) {
+ c = '?';
+ size = 1;
+ }
+ astr += size;
+ len -= size;
+ switch (c) {
+ case 0x2400:
+ c = 0;
+ break;
+ case ':':
+ c = '/';
+ break;
+ }
+ if (c >= 0xc0 && decompose) {
+ off = hfsplus_decompose_table[(c >> 12) & 0xf];
+ if (!off)
+ goto done;
+ if (off == 0xffff) {
+ goto done;
+ }
+ off = hfsplus_decompose_table[off + ((c >> 8) & 0xf)];
+ if (!off)
+ goto done;
+ off = hfsplus_decompose_table[off + ((c >> 4) & 0xf)];
+ if (!off)
+ goto done;
+ off = hfsplus_decompose_table[off + (c & 0xf)];
+ size = off & 3;
+ if (!size)
+ goto done;
+ off /= 4;
+ if (outlen + size > HFSPLUS_MAX_STRLEN)
+ break;
+ do {
+ ustr->unicode[outlen++] = cpu_to_be16(hfsplus_decompose_table[off++]);
+ } while (--size > 0);
+ continue;
+ }
+ done:
+ ustr->unicode[outlen++] = cpu_to_be16(c);
+ }
+ ustr->length = cpu_to_be16(outlen);
+ if (len > 0)
+ return -ENAMETOOLONG;
+ return 0;
+}