tests: Added numerous tests.

The tests are taken almost verbatim from the open source project PicoC. It can
be found at https://code.google.com/p/picoc/.

The tests range from very simple/trivial ones to more complicated. My view is
that the more tests the better. Without tests like this I was very reluctant to
make any changes to tcc for the fear of breaking things.

The tests pass on Win32, OSX, Linux x86 and x86_64. One or two tests fail on
each platform due to differences in the runtime library.

1 files changed, 266 insertions, 0 deletions

diff --git a/tests2/32_led.c b/tests2/32_led.c
new file mode 100644
index 0000000..5596cbf
--- /dev/null
+++ b/tests2/32_led.c
@@ -0,0 +1,266 @@
+/* example from http://barnyard.syr.edu/quickies/led.c */
+
+/* led.c: print out number as if on 7 line led display. I.e., write integer
+   given on command line like this:  
+      _   _       _  
+   |  _|  _| |_| |_  
+   | |_   _|   |  _| etc.
+
+   We assume the terminal behaves like a classical teletype. So the top
+   lines of all digits have to be printed first, then the middle lines of
+   all digits, etc.
+
+   By Terry R. McConnell
+
+compile: cc -o led led.c
+
+If you just want to link in the subroutine print_led that does all the
+work, compile with -DNO_MAIN, and declare the following in any source file
+that uses the call:
+
+extern void print_led(unsigned long x, char *buf);
+
+Bug: you cannot call repeatedly to print more than one number to a line.
+That would require curses or some other terminal API that allows moving the
+cursor to a previous line.
+
+*/
+
+
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#define MAX_DIGITS 32
+#define NO_MAIN
+
+
+/* Print the top line of the digit d into buffer. 
+   Does not null terminate buffer. */
+
+void topline(int d, char *p){
+
+   *p++ = ' ';
+   switch(d){
+
+      /* all these have _ on top line */
+
+      case 0:
+      case 2:
+      case 3:
+      case 5:
+      case 7:
+      case 8:
+      case 9:
+         *p++ = '_';
+         break;
+      default:
+         *p++=' ';
+
+   }
+   *p++=' ';
+}
+
+/* Print the middle line of the digit d into the buffer. 
+   Does not null terminate. */
+
+void midline(int d, char *p){
+
+   switch(d){
+
+      /* those that have leading | on middle line */
+
+      case 0:
+      case 4:
+      case 5:
+      case 6:
+      case 8:
+      case 9:
+         *p++='|';
+         break;
+      default:
+         *p++=' ';	
+   }
+   switch(d){
+
+      /* those that have _ on middle line */
+
+      case 2:
+      case 3:
+      case 4:
+      case 5:
+      case 6:
+      case 8:
+      case 9:
+         *p++='_';
+         break;
+      default:
+         *p++=' ';
+
+   }
+   switch(d){
+
+      /* those that have closing | on middle line */
+
+      case 0:
+      case 1:
+      case 2:
+      case 3:
+      case 4:
+      case 7:
+      case 8:
+      case 9:
+         *p++='|';
+         break;
+      default:
+         *p++=' ';
+
+   }
+}
+
+/* Print the bottom line of the digit d. Does not null terminate. */
+
+void botline(int d, char *p){
+
+
+   switch(d){
+
+      /* those that have leading | on bottom line */
+
+      case 0:
+      case 2:
+      case 6:
+      case 8:
+         *p++='|';
+         break;
+      default:
+         *p++=' ';	
+   }
+   switch(d){
+
+      /* those that have _ on bottom line */
+
+      case 0:
+      case 2:
+      case 3:
+      case 5:
+      case 6:
+      case 8:
+         *p++='_';
+         break;
+      default:
+         *p++=' ';
+
+   }
+   switch(d){
+
+      /* those that have closing | on bottom line */
+
+      case 0:
+      case 1:
+      case 3:
+      case 4:
+      case 5:
+      case 6:
+      case 7:
+      case 8:
+      case 9:
+         *p++='|';
+         break;
+      default:
+         *p++=' ';
+
+   }
+}
+
+/* Write the led representation of integer to string buffer. */
+
+void print_led(unsigned long x, char *buf)
+{
+
+   int i=0,n;
+   static int d[MAX_DIGITS];
+
+
+   /* extract digits from x */
+
+   n = ( x == 0L ? 1 : 0 );  /* 0 is a digit, hence a special case */
+
+   while(x){
+      d[n++] = (int)(x%10L);
+      if(n >= MAX_DIGITS)break;
+      x = x/10L;
+   }
+
+   /* print top lines of all digits */
+
+   for(i=n-1;i>=0;i--){
+      topline(d[i],buf);
+      buf += 3;
+      *buf++=' ';
+   }
+   *buf++='\n'; /* move teletype to next line */
+
+   /* print middle lines of all digits */
+
+   for(i=n-1;i>=0;i--){
+      midline(d[i],buf);
+      buf += 3;
+      *buf++=' ';
+   }
+   *buf++='\n';
+
+   /* print bottom lines of all digits */
+
+   for(i=n-1;i>=0;i--){
+      botline(d[i],buf);
+      buf += 3;
+      *buf++=' ';
+   }
+   *buf++='\n';
+   *buf='\0';
+}
+
+int main()
+{
+   char buf[5*MAX_DIGITS];
+   print_led(1234567, buf);
+   printf("%s\n",buf);
+
+   return 0;
+}
+
+#ifndef NO_MAIN
+int main(int argc, char **argv)
+{
+
+   int i=0,n;
+   long x;
+   static int d[MAX_DIGITS];
+   char buf[5*MAX_DIGITS];
+
+   if(argc != 2){
+      fprintf(stderr,"led: usage: led integer\n");
+      return 1;
+   }
+
+   /* fetch argument from command line */
+
+   x = atol(argv[1]);
+
+   /* sanity check */
+
+   if(x<0){
+      fprintf(stderr,"led: %d must be non-negative\n",x);
+      return 1;
+   }
+
+   print_led(x,buf);
+   printf("%s\n",buf);
+
+   return 0;
+
+}
+#endif
+
+/* vim: set expandtab ts=4 sw=3 sts=3 tw=80 :*/