Merge remote-tracking branch 'asoc/fix/dma' into asoc-linus

[karo-tx-linux.git] / fs / nls / nls_base.c

diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c
index 44a88a9fa2c87724408fb1268cb46b84b87b3746..fea6bd5831dce3d84868316c424266c1232949fd 100644 (file)
--- a/fs/nls/nls_base.c
+++ b/fs/nls/nls_base.c
@@ -52,7 +52,7 @@ static const struct utf8_table utf8_table[] =
 #define SURROGATE_LOW  0x00000400
 #define SURROGATE_BITS 0x000003ff
 
-int utf8_to_utf32(const u8 *s, int len, unicode_t *pu)
+int utf8_to_utf32(const u8 *s, int inlen, unicode_t *pu)
 {
        unsigned long l;
        int c0, c, nc;
@@ -71,7 +71,7 @@ int utf8_to_utf32(const u8 *s, int len, unicode_t *pu)
                        *pu = (unicode_t) l;
                        return nc;
                }
-               if (len <= nc)
+               if (inlen <= nc)
                        return -1;
                s++;
                c = (*s ^ 0x80) & 0xFF;
@@ -83,7 +83,7 @@ int utf8_to_utf32(const u8 *s, int len, unicode_t *pu)
 }
 EXPORT_SYMBOL(utf8_to_utf32);
 
-int utf32_to_utf8(unicode_t u, u8 *s, int maxlen)
+int utf32_to_utf8(unicode_t u, u8 *s, int maxout)
 {
        unsigned long l;
        int c, nc;
@@ -97,7 +97,7 @@ int utf32_to_utf8(unicode_t u, u8 *s, int maxlen)
                return -1;
 
        nc = 0;
-       for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) {
+       for (t = utf8_table; t->cmask && maxout; t++, maxout--) {
                nc++;
                if (l <= t->lmask) {
                        c = t->shift;
@@ -114,34 +114,57 @@ int utf32_to_utf8(unicode_t u, u8 *s, int maxlen)
 }
 EXPORT_SYMBOL(utf32_to_utf8);
 
-int utf8s_to_utf16s(const u8 *s, int len, wchar_t *pwcs)
+static inline void put_utf16(wchar_t *s, unsigned c, enum utf16_endian endian)
+{
+       switch (endian) {
+       default:
+               *s = (wchar_t) c;
+               break;
+       case UTF16_LITTLE_ENDIAN:
+               *s = __cpu_to_le16(c);
+               break;
+       case UTF16_BIG_ENDIAN:
+               *s = __cpu_to_be16(c);
+               break;
+       }
+}
+
+int utf8s_to_utf16s(const u8 *s, int inlen, enum utf16_endian endian,
+               wchar_t *pwcs, int maxout)
 {
        u16 *op;
        int size;
        unicode_t u;
 
        op = pwcs;
-       while (*s && len > 0) {
+       while (inlen > 0 && maxout > 0 && *s) {
                if (*s & 0x80) {
-                       size = utf8_to_utf32(s, len, &u);
+                       size = utf8_to_utf32(s, inlen, &u);
                        if (size < 0)
                                return -EINVAL;
+                       s += size;
+                       inlen -= size;
 
                        if (u >= PLANE_SIZE) {
+                               if (maxout < 2)
+                                       break;
                                u -= PLANE_SIZE;
-                               *op++ = (wchar_t) (SURROGATE_PAIR |
-                                               ((u >> 10) & SURROGATE_BITS));
-                               *op++ = (wchar_t) (SURROGATE_PAIR |
+                               put_utf16(op++, SURROGATE_PAIR |
+                                               ((u >> 10) & SURROGATE_BITS),
+                                               endian);
+                               put_utf16(op++, SURROGATE_PAIR |
                                                SURROGATE_LOW |
-                                               (u & SURROGATE_BITS));
+                                               (u & SURROGATE_BITS),
+                                               endian);
+                               maxout -= 2;
                        } else {
-                               *op++ = (wchar_t) u;
+                               put_utf16(op++, u, endian);
+                               maxout--;
                        }
-                       s += size;
-                       len -= size;
                } else {
-                       *op++ = *s++;
-                       len--;
+                       put_utf16(op++, *s++, endian);
+                       inlen--;
+                       maxout--;
                }
        }
        return op - pwcs;
@@ -160,27 +183,27 @@ static inline unsigned long get_utf16(unsigned c, enum utf16_endian endian)
        }
 }
 
-int utf16s_to_utf8s(const wchar_t *pwcs, int len, enum utf16_endian endian,
-               u8 *s, int maxlen)
+int utf16s_to_utf8s(const wchar_t *pwcs, int inlen, enum utf16_endian endian,
+               u8 *s, int maxout)
 {
        u8 *op;
        int size;
        unsigned long u, v;
 
        op = s;
-       while (len > 0 && maxlen > 0) {
+       while (inlen > 0 && maxout > 0) {
                u = get_utf16(*pwcs, endian);
                if (!u)
                        break;
                pwcs++;
-               len--;
+               inlen--;
                if (u > 0x7f) {
                        if ((u & SURROGATE_MASK) == SURROGATE_PAIR) {
                                if (u & SURROGATE_LOW) {
                                        /* Ignore character and move on */
                                        continue;
                                }
-                               if (len <= 0)
+                               if (inlen <= 0)
                                        break;
                                v = get_utf16(*pwcs, endian);
                                if ((v & SURROGATE_MASK) != SURROGATE_PAIR ||
@@ -191,18 +214,18 @@ int utf16s_to_utf8s(const wchar_t *pwcs, int len, enum utf16_endian endian,
                                u = PLANE_SIZE + ((u & SURROGATE_BITS) << 10)
                                                + (v & SURROGATE_BITS);
                                pwcs++;
-                               len--;
+                               inlen--;
                        }
-                       size = utf32_to_utf8(u, op, maxlen);
+                       size = utf32_to_utf8(u, op, maxout);
                        if (size == -1) {
                                /* Ignore character and move on */
                        } else {
                                op += size;
-                               maxlen -= size;
+                               maxout -= size;
                        }
                } else {
                        *op++ = (u8) u;
-                       maxlen--;
+                       maxout--;
                }
        }
        return op - s;