tests/libtcc_test.c

   1 /*
   2  * Simple Test program for libtcc
   3  *
   4  * libtcc can be useful to use tcc as a "backend" for a code generator.
   5  */
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <string.h>
   9
  10 #include "libtcc.h"
  11
  12 /* this function is called by the generated code */
  13 int add(int a, int b)
  14 {
  15     return a + b;
  16 }
  17
  18 char my_program[] =
  19 "int fib(int n)\n"
  20 "{\n"
  21 "    if (n <= 2)\n"
  22 "        return 1;\n"
  23 "    else\n"
  24 "        return fib(n-1) + fib(n-2);\n"
  25 "}\n"
  26 "\n"
  27 "int foo(int n)\n"
  28 "{\n"
  29 "    printf(\"Hello World!\\n\");\n"
  30 "    printf(\"fib(%d) = %d\\n\", n, fib(n));\n"
  31 "    printf(\"add(%d, %d) = %d\\n\", n, 2 * n, add(n, 2 * n));\n"
  32 "    return 0;\n"
  33 "}\n";
  34
  35 int main(int argc, char **argv)
  36 {
  37     TCCState *s;
  38     int (*func)(int);
  39
  40     s = tcc_new();
  41     if (!s) {
  42         fprintf(stderr, "Could not create tcc state\n");
  43         exit(1);
  44     }
  45
  46     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
  47     if (argc == 2 && !memcmp(argv[1], "lib_path=",9))
  48         tcc_set_lib_path(s, argv[1]+9);
  49
  50     /* MUST BE CALLED before any compilation */
  51     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
  52
  53     if (tcc_compile_string(s, my_program) == -1)
  54         return 1;
  55
  56     /* as a test, we add a symbol that the compiled program can use.
  57        You may also open a dll with tcc_add_dll() and use symbols from that */
  58     tcc_add_symbol(s, "add", add);
  59
  60     /* relocate the code */
  61     if (tcc_relocate(s) < 0)
  62         return 1;
  63
  64     /* get entry symbol */
  65     func = tcc_get_symbol(s, "foo");
  66     if (!func)
  67         return 1;
  68
  69     /* run the code */
  70     func(32);
  71
  72     /* delete the state */
  73     tcc_delete(s);
  74
  75     return 0;
  76 }