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-rw-r--r--iconvdata/ibm937.c97
1 files changed, 66 insertions, 31 deletions
diff --git a/iconvdata/ibm937.c b/iconvdata/ibm937.c
index 98e9683253..6da55ae883 100644
--- a/iconvdata/ibm937.c
+++ b/iconvdata/ibm937.c
@@ -1,5 +1,5 @@
/* Conversion to and from IBM937.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Masahide Washizawa <washi@yamato.ibm.co.jp>, 2000.
@@ -32,26 +32,68 @@
#define CHARSET_NAME "IBM937//"
#define FROM_LOOP from_ibm937
#define TO_LOOP to_ibm937
+#define MIN_NEEDED_FROM 1
+#define MAX_NEEDED_FROM 2
+#define MIN_NEEDED_TO 4
+#define MAX_NEEDED_TO 4
+#define PREPARE_LOOP \
+ int save_curcs; \
+ int *curcsp = &data->__statep->__count;
+#define EXTRA_LOOP_ARGS , curcsp
/* Definitions of initialization and destructor function. */
#define DEFINE_INIT 1
#define DEFINE_FINI 1
-#define MIN_NEEDED_FROM 1
-#define MIN_NEEDED_TO 4
+
+/* Since this is a stateful encoding we have to provide code which resets
+ the output state to the initial state. This has to be done during the
+ flushing. */
+#define EMIT_SHIFT_TO_INIT \
+ if ((data->__statep->__count & ~7) != sb) \
+ { \
+ if (FROM_DIRECTION) \
+ data->__statep->__count &= 7; \
+ else \
+ { \
+ unsigned char *outbuf = data->__outbuf; \
+ \
+ /* We are not in the initial state. To switch back we have \
+ to emit `SI'. */ \
+ if (__builtin_expect (outbuf >= data->__outbufend, 0)) \
+ /* We don't have enough room in the output buffer. */ \
+ status = __GCONV_FULL_OUTPUT; \
+ else \
+ { \
+ /* Write out the shift sequence. */ \
+ *outbuf++ = SI; \
+ data->__outbuf = outbuf; \
+ data->__statep->__count &= 7; \
+ } \
+ } \
+ }
+
+
+/* Since we might have to reset input pointer we must be able to save
+ and retore the state. */
+#define SAVE_RESET_STATE(Save) \
+ if (Save) \
+ save_curcs = *curcsp; \
+ else \
+ *curcsp = save_curcs
+
/* Current codeset type. */
enum
{
- init = 0,
- sb,
- db
+ sb = 0,
+ db = 64
};
/* First, define the conversion function from IBM-937 to UCS4. */
#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
+#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
-#define INIT_PARAMS int curcs = init;
#define LOOPFCT FROM_LOOP
#define BODY \
{ \
@@ -59,12 +101,6 @@ enum
\
if (__builtin_expect (ch, 0) == SO) \
{ \
- if (__builtin_expect (inptr + 1 >= inend, 0)) \
- { \
- result = __GCONV_INCOMPLETE_INPUT; \
- break; \
- } \
- \
/* Shift OUT, change to DBCS converter. */ \
if (curcs == db) \
{ \
@@ -73,16 +109,10 @@ enum
} \
curcs = db; \
++inptr; \
- ch = *inptr; \
+ continue; \
} \
else if (__builtin_expect (ch, 0) == SI) \
{ \
- if (__builtin_expect (inptr + 1 >= inend, 0)) \
- { \
- result = __GCONV_INCOMPLETE_INPUT; \
- break; \
- } \
- \
/* Shift IN, change to SBCS converter. */ \
if (curcs == sb) \
{ \
@@ -91,10 +121,10 @@ enum
} \
curcs = sb; \
++inptr; \
- ch = *inptr; \
+ continue; \
} \
\
- if (curcs == sb || curcs == init) \
+ if (curcs == sb) \
{ \
/* Use the UCS4 table for single byte. */ \
ch = __ibm937sb_to_ucs4[ch]; \
@@ -107,19 +137,20 @@ enum
break; \
} \
++*irreversible; \
- ++inptr; \
- continue; \
} \
else \
{ \
put32 (outptr, ch); \
outptr += 4; \
- inptr++; \
} \
+ ++inptr; \
} \
- else if (curcs == db) \
+ else \
{ \
/* Use the IBM937 table for double byte. */ \
+ \
+ assert (curcs == db); \
+ \
ch = ibm937db_to_ucs4(inptr[0], inptr[1]); \
if (__builtin_expect (ch, L'\1') == L'\0' && *inptr != '\0') \
{ \
@@ -130,24 +161,25 @@ enum
break; \
} \
++*irreversible; \
- inptr += 2; \
- continue; \
} \
else \
{ \
put32 (outptr, ch); \
outptr += 4; \
- inptr += 2; \
} \
+ inptr += 2; \
} \
}
#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS , int *curcsp
+#define INIT_PARAMS int curcs = *curcsp & ~7
+#define UPDATE_PARAMS *curcsp = curcs
#include <iconv/loop.c>
/* Next, define the other direction. */
#define MIN_NEEDED_INPUT MIN_NEEDED_TO
#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
-#define INIT_PARAMS int curcs = init;
+#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
#define LOOPFCT TO_LOOP
#define BODY \
{ \
@@ -174,7 +206,7 @@ enum
} \
else \
{ \
- if (curcs == init || curcs == sb) \
+ if (curcs == sb) \
{ \
*outptr++ = SO; \
if (__builtin_expect (outptr == outend, 0)) \
@@ -207,6 +239,9 @@ enum
inptr += 4; \
}
#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS , int *curcsp
+#define INIT_PARAMS int curcs = *curcsp & ~7
+#define UPDATE_PARAMS *curcsp = curcs
#include <iconv/loop.c>
/* Now define the toplevel functions. */