* very basic C ... args testing

tests/test/cg/tprintf.pp

@@ -0,0 +1,57 @@
+{ %NOTE=This test requires a C library }
+
+{$mode objfpc}
+
+
+{$linklib c}
+
+uses
+  strings;
+
+type
+ THandle = longint;
+const
+  l : longint = 45;
+  s : pchar = 'Enclosed text';
+  d : double = 45.45;
+  p : pchar = nil;
+  has_errors : boolean = false;
+
+procedure printf(const formatstr : pchar; const args : array of const);cdecl; external;
+procedure sprintf(p : pchar;const formatstr : pchar; const args : array of const);cdecl; external;
+
+begin
+  getmem(p,500);
+
+  Writeln('Testing C printf function called from FPC code');
+//  printf('Simple test without arg'#10,[]);
+  Writeln('Testing with single pchar argument');
+  printf('Text containing "%s" text'#10,[s]);
+  sprintf(p,'Text containing "%s" text'#10,[s]);
+  if strpos(p,'g "Enclosed text" ')=nil then
+    begin
+      writeln('The output of sprintf for pchar is wrong:',p);
+      has_errors:=true;
+    end;
+
+  Writeln('Testing with single longint argument');
+  printf('Text containing longint : %d'#10,[l]);
+  sprintf(p,'Text containing longint : %d'#10,[l]);
+  if strpos(p,'longint : 45')=nil then
+    begin
+      writeln('The output of sprintf for longint is wrong:',p);
+      has_errors:=true;
+    end;
+
+  Writeln('Testing with single double argument');
+  printf('Text containing double : %f'#10,[d]);
+  sprintf(p,'Text containing double : %f'#10,[d]);
+  if strpos(p,' : 45.45')=nil then
+    begin
+      writeln('The output of sprintf for double is wrong:',p);
+      has_errors:=true;
+    end;
+
+  if has_errors then
+    halt(1);
+end.