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/udf/unicode.c b/fs/udf/unicode.c
new file mode 100644
index 0000000..5a80efd
--- /dev/null
+++ b/fs/udf/unicode.c
@@ -0,0 +1,516 @@
+/*
+ * unicode.c
+ *
+ * PURPOSE
+ * Routines for converting between UTF-8 and OSTA Compressed Unicode.
+ * Also handles filename mangling
+ *
+ * DESCRIPTION
+ * OSTA Compressed Unicode is explained in the OSTA UDF specification.
+ * http://www.osta.org/
+ * UTF-8 is explained in the IETF RFC XXXX.
+ * ftp://ftp.internic.net/rfc/rfcxxxx.txt
+ *
+ * CONTACTS
+ * E-mail regarding any portion of the Linux UDF file system should be
+ * directed to the development team's mailing list (run by majordomo):
+ * linux_udf@hpesjro.fc.hp.com
+ *
+ * COPYRIGHT
+ * This file is distributed under the terms of the GNU General Public
+ * License (GPL). Copies of the GPL can be obtained from:
+ * ftp://prep.ai.mit.edu/pub/gnu/GPL
+ * Each contributing author retains all rights to their own work.
+ */
+
+#include "udfdecl.h"
+
+#include <linux/kernel.h>
+#include <linux/string.h> /* for memset */
+#include <linux/nls.h>
+#include <linux/udf_fs.h>
+
+#include "udf_sb.h"
+
+static int udf_translate_to_linux(uint8_t *, uint8_t *, int, uint8_t *, int);
+
+static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen)
+{
+ if ( (!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN-2) )
+ return 0;
+ memset(dest, 0, sizeof(struct ustr));
+ memcpy(dest->u_name, src, strlen);
+ dest->u_cmpID = 0x08;
+ dest->u_len = strlen;
+ return strlen;
+}
+
+/*
+ * udf_build_ustr
+ */
+int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
+{
+ int usesize;
+
+ if ( (!dest) || (!ptr) || (!size) )
+ return -1;
+
+ memset(dest, 0, sizeof(struct ustr));
+ usesize= (size > UDF_NAME_LEN) ? UDF_NAME_LEN : size;
+ dest->u_cmpID=ptr[0];
+ dest->u_len=ptr[size-1];
+ memcpy(dest->u_name, ptr+1, usesize-1);
+ return 0;
+}
+
+/*
+ * udf_build_ustr_exact
+ */
+static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
+{
+ if ( (!dest) || (!ptr) || (!exactsize) )
+ return -1;
+
+ memset(dest, 0, sizeof(struct ustr));
+ dest->u_cmpID=ptr[0];
+ dest->u_len=exactsize-1;
+ memcpy(dest->u_name, ptr+1, exactsize-1);
+ return 0;
+}
+
+/*
+ * udf_ocu_to_utf8
+ *
+ * PURPOSE
+ * Convert OSTA Compressed Unicode to the UTF-8 equivalent.
+ *
+ * DESCRIPTION
+ * This routine is only called by udf_filldir().
+ *
+ * PRE-CONDITIONS
+ * utf Pointer to UTF-8 output buffer.
+ * ocu Pointer to OSTA Compressed Unicode input buffer
+ * of size UDF_NAME_LEN bytes.
+ * both of type "struct ustr *"
+ *
+ * POST-CONDITIONS
+ * <return> Zero on success.
+ *
+ * HISTORY
+ * November 12, 1997 - Andrew E. Mileski
+ * Written, tested, and released.
+ */
+int udf_CS0toUTF8(struct ustr *utf_o, struct ustr *ocu_i)
+{
+ uint8_t *ocu;
+ uint32_t c;
+ uint8_t cmp_id, ocu_len;
+ int i;
+
+ ocu = ocu_i->u_name;
+
+ ocu_len = ocu_i->u_len;
+ cmp_id = ocu_i->u_cmpID;
+ utf_o->u_len = 0;
+
+ if (ocu_len == 0)
+ {
+ memset(utf_o, 0, sizeof(struct ustr));
+ utf_o->u_cmpID = 0;
+ utf_o->u_len = 0;
+ return 0;
+ }
+
+ if ((cmp_id != 8) && (cmp_id != 16))
+ {
+ printk(KERN_ERR "udf: unknown compression code (%d) stri=%s\n", cmp_id, ocu_i->u_name);
+ return 0;
+ }
+
+ for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN-3)) ;)
+ {
+
+ /* Expand OSTA compressed Unicode to Unicode */
+ c = ocu[i++];
+ if (cmp_id == 16)
+ c = (c << 8) | ocu[i++];
+
+ /* Compress Unicode to UTF-8 */
+ if (c < 0x80U)
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
+ else if (c < 0x800U)
+ {
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)(0xc0 | (c >> 6));
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)(0x80 | (c & 0x3f));
+ }
+ else
+ {
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)(0xe0 | (c >> 12));
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)(0x80 | ((c >> 6) & 0x3f));
+ utf_o->u_name[utf_o->u_len++] = (uint8_t)(0x80 | (c & 0x3f));
+ }
+ }
+ utf_o->u_cmpID=8;
+
+ return utf_o->u_len;
+}
+
+/*
+ *
+ * udf_utf8_to_ocu
+ *
+ * PURPOSE
+ * Convert UTF-8 to the OSTA Compressed Unicode equivalent.
+ *
+ * DESCRIPTION
+ * This routine is only called by udf_lookup().
+ *
+ * PRE-CONDITIONS
+ * ocu Pointer to OSTA Compressed Unicode output
+ * buffer of size UDF_NAME_LEN bytes.
+ * utf Pointer to UTF-8 input buffer.
+ * utf_len Length of UTF-8 input buffer in bytes.
+ *
+ * POST-CONDITIONS
+ * <return> Zero on success.
+ *
+ * HISTORY
+ * November 12, 1997 - Andrew E. Mileski
+ * Written, tested, and released.
+ */
+static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length)
+{
+ unsigned c, i, max_val, utf_char;
+ int utf_cnt, u_len;
+
+ memset(ocu, 0, sizeof(dstring) * length);
+ ocu[0] = 8;
+ max_val = 0xffU;
+
+try_again:
+ u_len = 0U;
+ utf_char = 0U;
+ utf_cnt = 0U;
+ for (i = 0U; i < utf->u_len; i++)
+ {
+ c = (uint8_t)utf->u_name[i];
+
+ /* Complete a multi-byte UTF-8 character */
+ if (utf_cnt)
+ {
+ utf_char = (utf_char << 6) | (c & 0x3fU);
+ if (--utf_cnt)
+ continue;
+ }
+ else
+ {
+ /* Check for a multi-byte UTF-8 character */
+ if (c & 0x80U)
+ {
+ /* Start a multi-byte UTF-8 character */
+ if ((c & 0xe0U) == 0xc0U)
+ {
+ utf_char = c & 0x1fU;
+ utf_cnt = 1;
+ }
+ else if ((c & 0xf0U) == 0xe0U)
+ {
+ utf_char = c & 0x0fU;
+ utf_cnt = 2;
+ }
+ else if ((c & 0xf8U) == 0xf0U)
+ {
+ utf_char = c & 0x07U;
+ utf_cnt = 3;
+ }
+ else if ((c & 0xfcU) == 0xf8U)
+ {
+ utf_char = c & 0x03U;
+ utf_cnt = 4;
+ }
+ else if ((c & 0xfeU) == 0xfcU)
+ {
+ utf_char = c & 0x01U;
+ utf_cnt = 5;
+ }
+ else
+ goto error_out;
+ continue;
+ } else
+ /* Single byte UTF-8 character (most common) */
+ utf_char = c;
+ }
+
+ /* Choose no compression if necessary */
+ if (utf_char > max_val)
+ {
+ if ( 0xffU == max_val )
+ {
+ max_val = 0xffffU;
+ ocu[0] = (uint8_t)0x10U;
+ goto try_again;
+ }
+ goto error_out;
+ }
+
+ if (max_val == 0xffffU)
+ {
+ ocu[++u_len] = (uint8_t)(utf_char >> 8);
+ }
+ ocu[++u_len] = (uint8_t)(utf_char & 0xffU);
+ }
+
+
+ if (utf_cnt)
+ {
+error_out:
+ ocu[++u_len] = '?';
+ printk(KERN_DEBUG "udf: bad UTF-8 character\n");
+ }
+
+ ocu[length - 1] = (uint8_t)u_len + 1;
+ return u_len + 1;
+}
+
+static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o, struct ustr *ocu_i)
+{
+ uint8_t *ocu;
+ uint32_t c;
+ uint8_t cmp_id, ocu_len;
+ int i;
+
+ ocu = ocu_i->u_name;
+
+ ocu_len = ocu_i->u_len;
+ cmp_id = ocu_i->u_cmpID;
+ utf_o->u_len = 0;
+
+ if (ocu_len == 0)
+ {
+ memset(utf_o, 0, sizeof(struct ustr));
+ utf_o->u_cmpID = 0;
+ utf_o->u_len = 0;
+ return 0;
+ }
+
+ if ((cmp_id != 8) && (cmp_id != 16))
+ {
+ printk(KERN_ERR "udf: unknown compression code (%d) stri=%s\n", cmp_id, ocu_i->u_name);
+ return 0;
+ }
+
+ for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN-3)) ;)
+ {
+ /* Expand OSTA compressed Unicode to Unicode */
+ c = ocu[i++];
+ if (cmp_id == 16)
+ c = (c << 8) | ocu[i++];
+
+ utf_o->u_len += nls->uni2char(c, &utf_o->u_name[utf_o->u_len],
+ UDF_NAME_LEN - utf_o->u_len);
+ }
+ utf_o->u_cmpID=8;
+
+ return utf_o->u_len;
+}
+
+static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni, int length)
+{
+ unsigned len, i, max_val;
+ uint16_t uni_char;
+ int u_len;
+
+ memset(ocu, 0, sizeof(dstring) * length);
+ ocu[0] = 8;
+ max_val = 0xffU;
+
+try_again:
+ u_len = 0U;
+ for (i = 0U; i < uni->u_len; i++)
+ {
+ len = nls->char2uni(&uni->u_name[i], uni->u_len-i, &uni_char);
+ if (len <= 0)
+ continue;
+
+ if (uni_char > max_val)
+ {
+ max_val = 0xffffU;
+ ocu[0] = (uint8_t)0x10U;
+ goto try_again;
+ }
+
+ if (max_val == 0xffffU)
+ ocu[++u_len] = (uint8_t)(uni_char >> 8);
+ ocu[++u_len] = (uint8_t)(uni_char & 0xffU);
+ i += len - 1;
+ }
+
+ ocu[length - 1] = (uint8_t)u_len + 1;
+ return u_len + 1;
+}
+
+int udf_get_filename(struct super_block *sb, uint8_t *sname, uint8_t *dname, int flen)
+{
+ struct ustr filename, unifilename;
+ int len;
+
+ if (udf_build_ustr_exact(&unifilename, sname, flen))
+ {
+ return 0;
+ }
+
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
+ {
+ if (!udf_CS0toUTF8(&filename, &unifilename) )
+ {
+ udf_debug("Failed in udf_get_filename: sname = %s\n", sname);
+ return 0;
+ }
+ }
+ else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
+ {
+ if (!udf_CS0toNLS(UDF_SB(sb)->s_nls_map, &filename, &unifilename) )
+ {
+ udf_debug("Failed in udf_get_filename: sname = %s\n", sname);
+ return 0;
+ }
+ }
+ else
+ return 0;
+
+ if ((len = udf_translate_to_linux(dname, filename.u_name, filename.u_len,
+ unifilename.u_name, unifilename.u_len)))
+ {
+ return len;
+ }
+ return 0;
+}
+
+int udf_put_filename(struct super_block *sb, const uint8_t *sname, uint8_t *dname, int flen)
+{
+ struct ustr unifilename;
+ int namelen;
+
+ if ( !(udf_char_to_ustr(&unifilename, sname, flen)) )
+ {
+ return 0;
+ }
+
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
+ {
+ if ( !(namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN)) )
+ {
+ return 0;
+ }
+ }
+ else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
+ {
+ if ( !(namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname, &unifilename, UDF_NAME_LEN)) )
+ {
+ return 0;
+ }
+ }
+ else
+ return 0;
+
+ return namelen;
+}
+
+#define ILLEGAL_CHAR_MARK '_'
+#define EXT_MARK '.'
+#define CRC_MARK '#'
+#define EXT_SIZE 5
+
+static int udf_translate_to_linux(uint8_t *newName, uint8_t *udfName, int udfLen, uint8_t *fidName, int fidNameLen)
+{
+ int index, newIndex = 0, needsCRC = 0;
+ int extIndex = 0, newExtIndex = 0, hasExt = 0;
+ unsigned short valueCRC;
+ uint8_t curr;
+ const uint8_t hexChar[] = "0123456789ABCDEF";
+
+ if (udfName[0] == '.' && (udfLen == 1 ||
+ (udfLen == 2 && udfName[1] == '.')))
+ {
+ needsCRC = 1;
+ newIndex = udfLen;
+ memcpy(newName, udfName, udfLen);
+ }
+ else
+ {
+ for (index = 0; index < udfLen; index++)
+ {
+ curr = udfName[index];
+ if (curr == '/' || curr == 0)
+ {
+ needsCRC = 1;
+ curr = ILLEGAL_CHAR_MARK;
+ while (index+1 < udfLen && (udfName[index+1] == '/' ||
+ udfName[index+1] == 0))
+ index++;
+ }
+ if (curr == EXT_MARK && (udfLen - index - 1) <= EXT_SIZE)
+ {
+ if (udfLen == index + 1)
+ hasExt = 0;
+ else
+ {
+ hasExt = 1;
+ extIndex = index;
+ newExtIndex = newIndex;
+ }
+ }
+ if (newIndex < 256)
+ newName[newIndex++] = curr;
+ else
+ needsCRC = 1;
+ }
+ }
+ if (needsCRC)
+ {
+ uint8_t ext[EXT_SIZE];
+ int localExtIndex = 0;
+
+ if (hasExt)
+ {
+ int maxFilenameLen;
+ for(index = 0; index<EXT_SIZE && extIndex + index +1 < udfLen;
+ index++ )
+ {
+ curr = udfName[extIndex + index + 1];
+
+ if (curr == '/' || curr == 0)
+ {
+ needsCRC = 1;
+ curr = ILLEGAL_CHAR_MARK;
+ while(extIndex + index + 2 < udfLen && (index + 1 < EXT_SIZE
+ && (udfName[extIndex + index + 2] == '/' ||
+ udfName[extIndex + index + 2] == 0)))
+ index++;
+ }
+ ext[localExtIndex++] = curr;
+ }
+ maxFilenameLen = 250 - localExtIndex;
+ if (newIndex > maxFilenameLen)
+ newIndex = maxFilenameLen;
+ else
+ newIndex = newExtIndex;
+ }
+ else if (newIndex > 250)
+ newIndex = 250;
+ newName[newIndex++] = CRC_MARK;
+ valueCRC = udf_crc(fidName, fidNameLen, 0);
+ newName[newIndex++] = hexChar[(valueCRC & 0xf000) >> 12];
+ newName[newIndex++] = hexChar[(valueCRC & 0x0f00) >> 8];
+ newName[newIndex++] = hexChar[(valueCRC & 0x00f0) >> 4];
+ newName[newIndex++] = hexChar[(valueCRC & 0x000f)];
+
+ if (hasExt)
+ {
+ newName[newIndex++] = EXT_MARK;
+ for (index = 0;index < localExtIndex ;index++ )
+ newName[newIndex++] = ext[index];
+ }
+ }
+ return newIndex;
+}