ppc: yyinput returns a int, truncating to (unsigned)char does't work

retain this as an int so that on platforms where char is unsigned
we don't mangle the value and get this all wrong.

Fixes database opening tables on ppc if -fsigned-char is removed

Change-Id: I66f0c6b1b19191595f8b348377579f2daabf7ada

connectivity/source/parse/sqlflex.l

@@ -76,7 +76,7 @@ using namespace connectivity;
 
 static ::rtl::OUString aEmptyString;
 
-static sal_Int32	gatherString(sal_Int32 delim, sal_Int32 nTyp);
+static sal_Int32	gatherString(int delim, sal_Int32 nTyp);
 static sal_Int32	gatherName(const sal_Char*);
 static sal_Int32	gatherNamePre(const sal_Char* );
 // has to be set before the parser starts
@@ -94,8 +94,8 @@ OSQLScanner* xxx_pGLOBAL_SQLSCAN = NULL;
 
 #define YY_INPUT(buf,result,max_size) 				\
 {													\
-	buf[0] = xxx_pGLOBAL_SQLSCAN->SQLyygetc();		\
-	result = buf[0] != -1;							\
+    int c = xxx_pGLOBAL_SQLSCAN->SQLyygetc();		\
+    result = (c == EOF) ? YY_NULL : (buf[0] = c, 1);\
 }
 
 #define YY_FATAL_ERROR(msg)							\
@@ -518,9 +518,9 @@ inline bool checkeof(int c) { return c == 0 || c == EOF; }
  * nTyp == 1 -> SQL_NODE_STRING
  * nTyp == 2 -> SQL_NODE_ACCESS_DATE
  */
-sal_Int32 gatherString( sal_Int32 delim, sal_Int32 nTyp)
+sal_Int32 gatherString(int delim, sal_Int32 nTyp)
 {
-	sal_Char ch;
+	int ch;
 	::rtl::OStringBuffer sBuffer(256);
 
 	while (!checkeof(ch = yyinput())) 
@@ -547,7 +547,7 @@ sal_Int32 gatherString( sal_Int32 delim, sal_Int32 nTyp)
 			} 
 			else
 			{
-			    sBuffer.append(ch);
+			    sBuffer.append(static_cast<sal_Char>(ch));
 			}
 
 		} 
@@ -555,7 +555,7 @@ sal_Int32 gatherString( sal_Int32 delim, sal_Int32 nTyp)
 			break;					
 		else
 		{
-		    sBuffer.append(ch);
+		    sBuffer.append(static_cast<sal_Char>(ch));
 		}
 	}
 	YY_FATAL_ERROR("Unterminated name string"); 
@@ -746,7 +746,7 @@ void OSQLScanner::SQLyyerror(sal_Char *fmt)
 
 		sal_Char *s = Buffer;
 		sal_Int32 nPos = 1;
-		sal_Int32 ch = SQLyytext ? (SQLyytext[0] == 0 ? ' ' : SQLyytext[0]): ' ';
+		int ch = SQLyytext ? (SQLyytext[0] == 0 ? ' ' : SQLyytext[0]): ' ';
 		*s++ = ch;
 		while (!checkeof(ch = yyinput())) 
 		{
@@ -800,7 +800,7 @@ void OSQLScanner::prepareScan(const ::rtl::OUString & rNewStatement, const IPars
 //------------------------------------------------------------------------------
 sal_Int32 OSQLScanner::SQLyygetc(void)
 {
-	sal_Int32 nPos = (m_nCurrentPos >= m_sStatement.getLength()) ? -1 : m_sStatement.getStr()[m_nCurrentPos];
+	sal_Int32 nPos = (m_nCurrentPos >= m_sStatement.getLength()) ? EOF : m_sStatement.getStr()[m_nCurrentPos];
     m_nCurrentPos++;
     return nPos;
 }