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 /* this strinc is referenced by the generated code */
  19 const char hello[] = "Hello World!";
  20
  21 char my_program[] =
  22 "#include <tcclib.h>\n" /* include the "Simple libc header for TCC" */
  23 "extern int add(int a, int b);\n"
  24 "#ifdef _WIN32\n" /* dynamically linked data needs 'dllimport' */
  25 " __attribute__((dllimport))\n"
  26 "#endif\n"
  27 "extern const char hello[];\n"
  28 "int fib(int n)\n"
  29 "{\n"
  30 "    if (n <= 2)\n"
  31 "        return 1;\n"
  32 "    else\n"
  33 "        return fib(n-1) + fib(n-2);\n"
  34 "}\n"
  35 "\n"
  36 "int foo(int n)\n"
  37 "{\n"
  38 "    printf(\"%s\\n\", hello);\n"
  39 "    printf(\"fib(%d) = %d\\n\", n, fib(n));\n"
  40 "    printf(\"add(%d, %d) = %d\\n\", n, 2 * n, add(n, 2 * n));\n"
  41 "    return 0;\n"
  42 "}\n";
  43
  44 int main(int argc, char **argv)
  45 {
  46     TCCState *s;
  47     int i;
  48     int (*func)(int);
  49
  50     s = tcc_new();
  51     if (!s) {
  52         fprintf(stderr, "Could not create tcc state\n");
  53         exit(1);
  54     }
  55
  56     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
  57     for (i = 1; i < argc; ++i) {
  58         char *a = argv[i];
  59         if (a[0] == '-') {
  60             if (a[1] == 'B')
  61                 tcc_set_lib_path(s, a+2);
  62             else if (a[1] == 'I')
  63                 tcc_add_include_path(s, a+2);
  64             else if (a[1] == 'L')
  65                 tcc_add_library_path(s, a+2);
  66         }
  67     }
  68
  69     /* MUST BE CALLED before any compilation */
  70     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
  71
  72     if (tcc_compile_string(s, my_program) == -1)
  73         return 1;
  74
  75     /* as a test, we add symbols that the compiled program can use.
  76        You may also open a dll with tcc_add_dll() and use symbols from that */
  77     tcc_add_symbol(s, "add", add);
  78     tcc_add_symbol(s, "hello", hello);
  79
  80     /* relocate the code */
  81     if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0)
  82         return 1;
  83
  84     /* get entry symbol */
  85     func = tcc_get_symbol(s, "foo");
  86     if (!func)
  87         return 1;
  88
  89     /* run the code */
  90     func(32);
  91
  92     /* delete the state */
  93     tcc_delete(s);
  94
  95     return 0;
  96 }