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 "#include <tcclib.h>\n" /* include the "Simple libc header for TCC" */
  20 "extern int add(int a, int b);\n"
  21 "int fib(int n)\n"
  22 "{\n"
  23 "    if (n <= 2)\n"
  24 "        return 1;\n"
  25 "    else\n"
  26 "        return fib(n-1) + fib(n-2);\n"
  27 "}\n"
  28 "\n"
  29 "int foo(int n)\n"
  30 "{\n"
  31 "    printf(\"Hello World!\\n\");\n"
  32 "    printf(\"fib(%d) = %d\\n\", n, fib(n));\n"
  33 "    printf(\"add(%d, %d) = %d\\n\", n, 2 * n, add(n, 2 * n));\n"
  34 "    return 0;\n"
  35 "}\n";
  36
  37 int main(int argc, char **argv)
  38 {
  39     TCCState *s;
  40     int i;
  41     int (*func)(int);
  42
  43     s = tcc_new();
  44     if (!s) {
  45         fprintf(stderr, "Could not create tcc state\n");
  46         exit(1);
  47     }
  48
  49     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
  50     for (i = 1; i < argc; ++i) {
  51         char *a = argv[i];
  52         if (a[0] == '-') {
  53             if (a[1] == 'B')
  54                 tcc_set_lib_path(s, a+2);
  55             else if (a[1] == 'I')
  56                 tcc_add_include_path(s, a+2);
  57             else if (a[1] == 'L')
  58                 tcc_add_library_path(s, a+2);
  59         }
  60     }
  61
  62     /* MUST BE CALLED before any compilation */
  63     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
  64
  65     if (tcc_compile_string(s, my_program) == -1)
  66         return 1;
  67
  68     /* as a test, we add a symbol that the compiled program can use.
  69        You may also open a dll with tcc_add_dll() and use symbols from that */
  70     tcc_add_symbol(s, "add", add);
  71
  72     /* relocate the code */
  73     if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0)
  74         return 1;
  75
  76     /* get entry symbol */
  77     func = tcc_get_symbol(s, "foo");
  78     if (!func)
  79         return 1;
  80
  81     /* run the code */
  82     func(32);
  83
  84     /* delete the state */
  85     tcc_delete(s);
  86
  87     return 0;
  88 }