Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
[pandora-kernel.git] / fs / udf / unicode.c
index 706c92e..9e6099c 100644 (file)
@@ -31,12 +31,14 @@ 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) )
+       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;
 }
 
@@ -47,14 +49,15 @@ int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
 {
        int usesize;
 
-       if ( (!dest) || (!ptr) || (!size) )
+       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);
+       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;
 }
 
@@ -63,13 +66,14 @@ int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
  */
 static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
 {
-       if ( (!dest) || (!ptr) || (!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);
+       dest->u_cmpID = ptr[0];
+       dest->u_len = exactsize - 1;
+       memcpy(dest->u_name, ptr + 1, exactsize - 1);
+
        return 0;
 }
 
@@ -108,22 +112,20 @@ int udf_CS0toUTF8(struct ustr *utf_o, struct ustr *ocu_i)
        cmp_id = ocu_i->u_cmpID;
        utf_o->u_len = 0;
 
-       if (ocu_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);
+       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)) ;)
-       {
+       for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
 
                /* Expand OSTA compressed Unicode to Unicode */
                c = ocu[i++];
@@ -131,21 +133,18 @@ int udf_CS0toUTF8(struct ustr *utf_o, struct ustr *ocu_i)
                        c = (c << 8) | ocu[i++];
 
                /* Compress Unicode to UTF-8 */
-               if (c < 0x80U)
+               if (c < 0x80U) {
                        utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
-               else if (c < 0x800U)
-               {
+               } 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
-               {
+               } 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;
+       utf_o->u_cmpID = 8;
 
        return utf_o->u_len;
 }
@@ -186,61 +185,46 @@ try_again:
        u_len = 0U;
        utf_char = 0U;
        utf_cnt = 0U;
-       for (i = 0U; i < utf->u_len; i++)
-       {
+       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)
-               {
+               if (utf_cnt) {
                        utf_char = (utf_char << 6) | (c & 0x3fU);
                        if (--utf_cnt)
                                continue;
-               }
-               else
-               {
+               } else {
                        /* Check for a multi-byte UTF-8 character */
-                       if (c & 0x80U)
-                       {
+                       if (c & 0x80U) {
                                /* Start a multi-byte UTF-8 character */
-                               if ((c & 0xe0U) == 0xc0U)
-                               {
+                               if ((c & 0xe0U) == 0xc0U) {
                                        utf_char = c & 0x1fU;
                                        utf_cnt = 1;
-                               }
-                               else if ((c & 0xf0U) == 0xe0U)
-                               {
+                               } else if ((c & 0xf0U) == 0xe0U) {
                                        utf_char = c & 0x0fU;
                                        utf_cnt = 2;
-                               }
-                               else if ((c & 0xf8U) == 0xf0U)
-                               {
+                               } else if ((c & 0xf8U) == 0xf0U) {
                                        utf_char = c & 0x07U;
                                        utf_cnt = 3;
-                               }
-                               else if ((c & 0xfcU) == 0xf8U)
-                               {
+                               } else if ((c & 0xfcU) == 0xf8U) {
                                        utf_char = c & 0x03U;
                                        utf_cnt = 4;
-                               }
-                               else if ((c & 0xfeU) == 0xfcU)
-                               {
+                               } else if ((c & 0xfeU) == 0xfcU) {
                                        utf_char = c & 0x01U;
                                        utf_cnt = 5;
-                               }
-                               else
+                               } else {
                                        goto error_out;
+                               }
                                continue;
-                       } else
+                       } 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 )
-                       {
+               if (utf_char > max_val) {
+                       if (max_val == 0xffU) {
                                max_val = 0xffffU;
                                ocu[0] = (uint8_t)0x10U;
                                goto try_again;
@@ -248,26 +232,25 @@ try_again:
                        goto error_out;
                }
 
-               if (max_val == 0xffffU)
-               {
+               if (max_val == 0xffffU) {
                        ocu[++u_len] = (uint8_t)(utf_char >> 8);
                }
                ocu[++u_len] = (uint8_t)(utf_char & 0xffU);
        }
 
-
-       if (utf_cnt)
-       {
+       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)
+static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o,
+                       struct ustr *ocu_i)
 {
        uint8_t *ocu;
        uint32_t c;
@@ -280,36 +263,35 @@ static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o, struct ustr *
        cmp_id = ocu_i->u_cmpID;
        utf_o->u_len = 0;
 
-       if (ocu_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);
+       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)) ;)
-       {
+       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_len += nls->uni2char(c, &utf_o->u_name[utf_o->u_len],
+                                             UDF_NAME_LEN - utf_o->u_len);
        }
-       utf_o->u_cmpID=8;
+       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)
+static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni,
+                       int length)
 {
        unsigned len, i, max_val;
        uint16_t uni_char;
@@ -321,19 +303,17 @@ static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni, i
 
 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);
+       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)
-               {
+               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);
@@ -344,112 +324,98 @@ try_again:
        return u_len + 1;
 }
 
-int udf_get_filename(struct super_block *sb, uint8_t *sname, uint8_t *dname, int flen)
+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))
-       {
+       if (udf_build_ustr_exact(&unifilename, sname, flen)) {
                return 0;
        }
 
-       if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
-       {
-               if (!udf_CS0toUTF8(&filename, &unifilename) )
-               {
+       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) )
-               {
+       } 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
+       } else {
                return 0;
+       }
 
-       if ((len = udf_translate_to_linux(dname, filename.u_name, filename.u_len,
-               unifilename.u_name, unifilename.u_len)))
-       {
+       len = udf_translate_to_linux(dname, filename.u_name, filename.u_len,
+                                    unifilename.u_name, unifilename.u_len);
+       if (len) {
                return len;
        }
+
        return 0;
 }
 
-int udf_put_filename(struct super_block *sb, const uint8_t *sname, uint8_t *dname, int flen)
+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)) )
-       {
+       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)) )
-               {
+       if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
+               namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN);
+               if (!namelen) {
                        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)) )
-               {
+       } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
+               namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname, &unifilename, UDF_NAME_LEN);
+               if (!namelen) {
                        return 0;
                }
-       }
-       else
+       } else {
                return 0;
+       }
 
        return namelen;
 }
 
 #define ILLEGAL_CHAR_MARK      '_'
-#define EXT_MARK                       '.'
-#define CRC_MARK                       '#'
-#define EXT_SIZE                       5
+#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)
+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 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] == '.')))
-       {
+       if (udfName[0] == '.' &&
+           (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) {
                needsCRC = 1;
                newIndex = udfLen;
                memcpy(newName, udfName, udfLen);
-       }
-       else
-       {       
-               for (index = 0; index < udfLen; index++)
-               {
+       } else {
+               for (index = 0; index < udfLen; index++) {
                        curr = udfName[index];
-                       if (curr == '/' || curr == 0)
-                       {
+                       if (curr == '/' || curr == 0) {
                                needsCRC = 1;
                                curr = ILLEGAL_CHAR_MARK;
-                               while (index+1 < udfLen && (udfName[index+1] == '/' ||
-                                       udfName[index+1] == 0))
+                               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)
+                       } if (curr == EXT_MARK && (udfLen - index - 1) <= EXT_SIZE) {
+                               if (udfLen == index + 1) {
                                        hasExt = 0;
-                               else
-                               {
+                               } else {
                                        hasExt = 1;
                                        extIndex = index;
                                        newExtIndex = newIndex;
@@ -461,26 +427,22 @@ static int udf_translate_to_linux(uint8_t *newName, uint8_t *udfName, int udfLen
                                needsCRC = 1;
                }
        }
-       if (needsCRC)
-       {
+       if (needsCRC) {
                uint8_t ext[EXT_SIZE];
                int localExtIndex = 0;
 
-               if (hasExt)
-               {
+               if (hasExt) {
                        int maxFilenameLen;
-                       for(index = 0; index<EXT_SIZE && extIndex + index +1 < udfLen;
-                               index++ )
-                       {
+                       for(index = 0; index < EXT_SIZE && extIndex + index + 1 < udfLen; index++) {
                                curr = udfName[extIndex + index + 1];
 
-                               if (curr == '/' || curr == 0)
-                               {
+                               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)))
+                                       while(extIndex + index + 2 < udfLen &&
+                                             (index + 1 < EXT_SIZE
+                                              && (udfName[extIndex + index + 2] == '/' ||
+                                                  udfName[extIndex + index + 2] == 0)))
                                                index++;
                                }
                                ext[localExtIndex++] = curr;
@@ -490,9 +452,9 @@ static int udf_translate_to_linux(uint8_t *newName, uint8_t *udfName, int udfLen
                                newIndex = maxFilenameLen;
                        else
                                newIndex = newExtIndex;
-               }
-               else if (newIndex > 250)
+               } else if (newIndex > 250) {
                        newIndex = 250;
+               }
                newName[newIndex++] = CRC_MARK;
                valueCRC = udf_crc(fidName, fidNameLen, 0);
                newName[newIndex++] = hexChar[(valueCRC & 0xf000) >> 12];
@@ -500,12 +462,12 @@ static int udf_translate_to_linux(uint8_t *newName, uint8_t *udfName, int udfLen
                newName[newIndex++] = hexChar[(valueCRC & 0x00f0) >> 4];
                newName[newIndex++] = hexChar[(valueCRC & 0x000f)];
 
-               if (hasExt)
-               {
+               if (hasExt) {
                        newName[newIndex++] = EXT_MARK;
-                       for (index = 0;index < localExtIndex ;index++ )
+                       for (index = 0; index < localExtIndex; index++)
                                newName[newIndex++] = ext[index];
                }
        }
+
        return newIndex;
 }