egcs projects compiler system

Exact copy of the snapshot, except for the removal of
	texinfo/
	gcc/ch/
	libchill/

1 files changed, 290 insertions, 0 deletions

diff --git a/gnu/egcs/gcc/mbchar.c b/gnu/egcs/gcc/mbchar.c
new file mode 100644
index 00000000000..a22e52b56b3
--- /dev/null
+++ b/gnu/egcs/gcc/mbchar.c
@@ -0,0 +1,290 @@
+/* Multibyte Character Functions.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* These functions are used to manipulate multibyte characters.  */
+
+/* Note regarding cross compilation:
+
+   In general translation of multibyte characters to wide characters can
+   only work in a native compiler since the translation function (mbtowc)
+   needs to know about both the source and target character encoding.  However,
+   this particular implementation for JIS, SJIS and EUCJP source characters
+   will work for any compiler with a newlib target.  Other targets may also
+   work provided that their wchar_t implementation is 2 bytes and the encoding
+   leaves the source character values unchanged (except for removing the
+   state shifting markers).  */
+
+#ifdef MULTIBYTE_CHARS
+#include "config.h"
+#include "system.h"
+#include "mbchar.h"
+#include <locale.h>
+
+typedef enum
+{
+  ESCAPE, DOLLAR, BRACKET, AT, B, J, NUL, JIS_CHAR, OTHER, JIS_C_NUM
+} JIS_CHAR_TYPE;
+
+typedef enum
+{
+  ASCII, A_ESC, A_ESC_DL, JIS, JIS_1, JIS_2, J_ESC, J_ESC_BR,
+  J2_ESC, J2_ESC_BR, INV, JIS_S_NUM
+} JIS_STATE; 
+
+typedef enum
+{
+  COPYA, COPYJ, COPYJ2, MAKE_A, MAKE_J, NOOP, EMPTY, ERROR
+} JIS_ACTION;
+
+/*****************************************************************************
+ * state/action tables for processing JIS encoding
+ * Where possible, switches to JIS are grouped with proceding JIS characters
+ * and switches to ASCII are grouped with preceding JIS characters.
+ * Thus, maximum returned length is:
+ *   2 (switch to JIS) + 2 (JIS characters) + 2 (switch back to ASCII) = 6.
+ *****************************************************************************/
+static JIS_STATE JIS_state_table[JIS_S_NUM][JIS_C_NUM] = {
+/*            ESCAPE DOLLAR   BRACKET   AT     B      J     NUL JIS_CHAR OTHER*/
+/*ASCII*/   { A_ESC, ASCII,   ASCII,    ASCII, ASCII, ASCII, ASCII,ASCII,ASCII},
+/*A_ESC*/   { ASCII, A_ESC_DL,ASCII,    ASCII, ASCII, ASCII, ASCII,ASCII,ASCII},
+/*A_ESC_DL*/{ ASCII, ASCII,   ASCII,    JIS,   JIS,   ASCII, ASCII,ASCII,ASCII},
+/*JIS*/     { J_ESC, JIS_1,   JIS_1,    JIS_1, JIS_1, JIS_1, INV,  JIS_1,INV },
+/*JIS_1*/   { INV,   JIS_2,   JIS_2,    JIS_2, JIS_2, JIS_2, INV,  JIS_2,INV },
+/*JIS_2*/   { J2_ESC,JIS,     JIS,      JIS,   JIS,   JIS,   INV,  JIS,  JIS },
+/*J_ESC*/   { INV,   INV,     J_ESC_BR, INV,   INV,   INV,   INV,  INV,  INV },
+/*J_ESC_BR*/{ INV,   INV,     INV,      INV,   ASCII, ASCII, INV,  INV,  INV },
+/*J2_ESC*/  { INV,   INV,     J2_ESC_BR,INV,   INV,   INV,   INV,  INV,  INV },
+/*J2_ESC_BR*/{INV,   INV,     INV,      INV,   ASCII, ASCII, INV,  INV,  INV },
+};
+
+static JIS_ACTION JIS_action_table[JIS_S_NUM][JIS_C_NUM] = {
+/*            ESCAPE DOLLAR BRACKET AT     B       J      NUL  JIS_CHAR OTHER */
+/*ASCII */   {NOOP,  COPYA, COPYA, COPYA,  COPYA,  COPYA, EMPTY, COPYA, COPYA},
+/*A_ESC */   {COPYA, NOOP,  COPYA, COPYA,  COPYA,  COPYA, COPYA, COPYA, COPYA},
+/*A_ESC_DL */{COPYA, COPYA, COPYA, MAKE_J, MAKE_J, COPYA, COPYA, COPYA, COPYA},
+/*JIS */     {NOOP,  NOOP,  NOOP,  NOOP,   NOOP,   NOOP,  ERROR, NOOP,  ERROR },
+/*JIS_1 */   {ERROR, NOOP,  NOOP,  NOOP,   NOOP,   NOOP,  ERROR, NOOP,  ERROR },
+/*JIS_2 */   {NOOP,  COPYJ2,COPYJ2,COPYJ2, COPYJ2, COPYJ2,ERROR, COPYJ2,COPYJ2},
+/*J_ESC */   {ERROR, ERROR, NOOP,  ERROR,  ERROR,  ERROR, ERROR, ERROR, ERROR },
+/*J_ESC_BR */{ERROR, ERROR, ERROR, ERROR,  NOOP,   NOOP,  ERROR, ERROR, ERROR },
+/*J2_ESC */  {ERROR, ERROR, NOOP,  ERROR,  ERROR,  ERROR, ERROR, ERROR, ERROR },
+/*J2_ESC_BR*/{ERROR, ERROR, ERROR, ERROR,  COPYJ,  COPYJ, ERROR, ERROR, ERROR },
+};
+
+
+char *literal_codeset = NULL;
+
+int
+local_mbtowc (pwc, s, n)
+     wchar_t       *pwc;
+     const char    *s;
+     size_t         n;
+{
+  static JIS_STATE save_state = ASCII;
+  JIS_STATE curr_state = save_state;
+  unsigned char *t = (unsigned char *)s;
+
+  if (s != NULL && n == 0)
+    return -1;
+
+  if (literal_codeset == NULL || strlen (literal_codeset) <= 1)
+    {
+      /* This must be the "C" locale or unknown locale -- fall thru */
+    }
+  else if (! strcmp (literal_codeset, "C-SJIS"))
+    {
+      int char1;
+      if (s == NULL)
+        return 0;  /* not state-dependent */
+      char1 = *t;
+      if (ISSJIS1 (char1))
+        {
+          int char2 = t[1];
+          if (n <= 1)
+            return -1;
+          if (ISSJIS2 (char2))
+            {
+	      if (pwc != NULL)
+		*pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1));
+              return 2;
+            }
+	  return -1;
+        }
+      if (pwc != NULL)
+	*pwc = (wchar_t)*t;
+      if (*t == '\0')
+	return 0;
+      return 1;
+    }
+  else if (! strcmp (literal_codeset, "C-EUCJP"))
+    {
+      int char1;
+      if (s == NULL)
+        return 0;  /* not state-dependent */
+      char1 = *t;
+      if (ISEUCJP (char1))
+        {
+          int char2 = t[1];     
+          if (n <= 1)
+            return -1;
+          if (ISEUCJP (char2))
+            {
+	      if (pwc != NULL)
+		*pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1));
+              return 2;
+            }
+	  return -1;
+        }
+      if (pwc != NULL)
+	*pwc = (wchar_t)*t;
+      if (*t == '\0')
+	return 0;
+      return 1;
+    }
+  else if (! strcmp (literal_codeset, "C-JIS"))
+    {
+      JIS_ACTION action;
+      JIS_CHAR_TYPE ch;
+      unsigned char *ptr;
+      int i, curr_ch;
+ 
+      if (s == NULL)
+	{
+	  save_state = ASCII;
+	  return 1;  /* state-dependent */
+	}
+
+      ptr = t;
+
+      for (i = 0; i < n; ++i)
+        {
+          curr_ch = t[i];
+          switch (curr_ch)
+            {
+	    case JIS_ESC_CHAR:
+              ch = ESCAPE;
+              break;
+	    case '$':
+              ch = DOLLAR;
+              break;
+            case '@':
+              ch = AT;
+              break;
+            case '(':
+	      ch = BRACKET;
+              break;
+            case 'B':
+              ch = B;
+              break;
+            case 'J':
+              ch = J;
+              break;
+            case '\0':
+              ch = NUL;
+              break;
+            default:
+              if (ISJIS (curr_ch))
+                ch = JIS_CHAR;
+              else
+                ch = OTHER;
+	    }
+
+          action = JIS_action_table[curr_state][ch];
+          curr_state = JIS_state_table[curr_state][ch];
+        
+          switch (action)
+            {
+            case NOOP:
+              break;
+            case EMPTY:
+	      if (pwc != NULL)
+		*pwc = (wchar_t)0;
+	      save_state = curr_state;
+              return i;
+            case COPYA:
+	      if (pwc != NULL)
+		*pwc = (wchar_t)*ptr;
+	      save_state = curr_state;
+              return (i + 1);
+            case COPYJ:
+	      if (pwc != NULL)
+		*pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1));
+	      save_state = curr_state;
+              return (i + 1);
+            case COPYJ2:
+	      if (pwc != NULL)
+		*pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1));
+	      save_state = curr_state;
+              return (ptr - t) + 2;
+            case MAKE_A:
+            case MAKE_J:
+              ptr = (char *)(t + i + 1);
+              break;
+            case ERROR:
+            default:
+              return -1;
+            }
+        }
+
+      return -1;  /* n < bytes needed */
+    }
+               
+#ifdef CROSS_COMPILE
+  if (s == NULL)
+    return 0;  /* not state-dependent */
+  if (pwc != NULL)
+    *pwc = *s;
+  return 1;
+#else
+  /* This must be the "C" locale or unknown locale. */
+  return mbtowc (pwc, s, n);
+#endif
+}
+
+int
+local_mblen (s, n)
+     const char    *s;
+     size_t         n;
+{
+  return local_mbtowc (NULL, s, n);
+}
+
+int
+local_mb_cur_max ()
+{
+  if (literal_codeset == NULL || strlen (literal_codeset) <= 1)
+    ;
+  else if (! strcmp (literal_codeset, "C-SJIS"))
+    return 2;
+  else if (! strcmp (literal_codeset, "C-EUCJP"))
+    return 2;
+  else if (! strcmp (literal_codeset, "C-JIS"))
+    return 8; /* 3 + 2 + 3 */
+
+#ifdef CROSS_COMPILE
+  return 1;
+#else
+  if (MB_CUR_MAX > 0)
+    return MB_CUR_MAX;
+
+  return 1; /* default */
+#endif
+}
+#endif /* MULTIBYTE_CHARS */