(STORE_REST): Explicitly store the total expected size.
authordrepper <drepper>
Thu, 16 Jan 2003 02:24:17 +0000 (02:24 +0000)
committerdrepper <drepper>
Thu, 16 Jan 2003 02:24:17 +0000 (02:24 +0000)
(UNPACK_BYTES): Do the reverse.

iconv/gconv_simple.c

index 3937b95..124c8e7 100644 (file)
@@ -1,5 +1,5 @@
 /* Simple transformations functions.
-   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -1031,7 +1031,7 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
        correct and that it requires a larger number of bytes than there              \
        are in the input buffer.  */                                          \
     wint_t ch = **inptrp;                                                    \
-    size_t cnt;                                                                      \
+    size_t cnt, r;                                                           \
                                                                              \
     state->__count = inend - *inptrp;                                        \
                                                                              \
@@ -1069,16 +1069,19 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
       }                                                                              \
                                                                              \
     /* The first byte is already consumed.  */                               \
-    --cnt;                                                                   \
+    r = cnt - 1;                                                             \
     while (++(*inptrp) < inend)                                                      \
       {                                                                              \
        ch <<= 6;                                                             \
        ch |= **inptrp & 0x3f;                                                \
-       --cnt;                                                                \
+       --r;                                                                  \
       }                                                                              \
                                                                              \
     /* Shift for the so far missing bytes.  */                               \
-    ch <<= cnt * 6;                                                          \
+    ch <<= r * 6;                                                            \
+                                                                             \
+    /* Store the number of bytes expected for the entire sequence.  */       \
+    ch = ch << 3 | cnt;                                                              \
                                                                              \
     /* Store the value.  */                                                  \
     state->__value.__wch = ch;                                               \
@@ -1086,35 +1089,14 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
 
 #define UNPACK_BYTES \
   {                                                                          \
+    static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc };  \
     wint_t wch = state->__value.__wch;                                       \
-    size_t ntotal;                                                           \
+    size_t ntotal = wch & 7;                                                 \
+    wch >>= 3;                                                               \
+                                                                             \
     inlen = state->__count;                                                  \
                                                                              \
-    if (state->__value.__wch <= 0x7ff)                                       \
-      {                                                                              \
-       bytebuf[0] = 0xc0;                                                    \
-       ntotal = 2;                                                           \
-      }                                                                              \
-    else if (__builtin_expect (state->__value.__wch <= 0xffff, 1))           \
-      {                                                                              \
-       bytebuf[0] = 0xe0;                                                    \
-       ntotal = 3;                                                           \
-      }                                                                              \
-    else if (__builtin_expect (state->__value.__wch < 0x1fffff, 1))          \
-      {                                                                              \
-       bytebuf[0] = 0xf0;                                                    \
-       ntotal = 4;                                                           \
-      }                                                                              \
-    else if (__builtin_expect (state->__value.__wch < 0x3ffffff, 1))         \
-      {                                                                              \
-       bytebuf[0] = 0xf8;                                                    \
-       ntotal = 5;                                                           \
-      }                                                                              \
-    else                                                                     \
-      {                                                                              \
-       bytebuf[0] = 0xfc;                                                    \
-       ntotal = 6;                                                           \
-      }                                                                              \
+    bytebuf[0] = inmask[ntotal - 2];                                         \
                                                                              \
     do                                                                       \
       {                                                                              \