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 #include "libtcc.h"
  10
  11 void handle_error(void *opaque, const char *msg)
  12 {
  13     fprintf(opaque, "%s\n", msg);
  14 }
  15
  16 /* this function is called by the generated code */
  17 int add(int a, int b)
  18 {
  19     return a + b;
  20 }
  21
  22 /* this strinc is referenced by the generated code */
  23 const char hello[] = "Hello World!";
  24
  25 char my_program[] =
  26 "#include <tcclib.h>\n" /* include the "Simple libc header for TCC" */
  27 "extern int add(int a, int b);\n"
  28 "#ifdef _WIN32\n" /* dynamically linked data needs 'dllimport' */
  29 " __attribute__((dllimport))\n"
  30 "#endif\n"
  31 "extern const char hello[];\n"
  32 "int fib(int n)\n"
  33 "{\n"
  34 "    if (n <= 2)\n"
  35 "        return 1;\n"
  36 "    else\n"
  37 "        return fib(n-1) + fib(n-2);\n"
  38 "}\n"
  39 "\n"
  40 "int foo(int n)\n"
  41 "{\n"
  42 "    printf(\"%s\\n\", hello);\n"
  43 "    printf(\"fib(%d) = %d\\n\", n, fib(n));\n"
  44 "    printf(\"add(%d, %d) = %d\\n\", n, 2 * n, add(n, 2 * n));\n"
  45 "    return 0;\n"
  46 "}\n";
  47
  48 int main(int argc, char **argv)
  49 {
  50     TCCState *s;
  51     int i;
  52     int (*func)(int);
  53
  54     s = tcc_new();
  55     if (!s) {
  56         fprintf(stderr, "Could not create tcc state\n");
  57         exit(1);
  58     }
  59
  60     /* set custom error/warning printer */
  61     tcc_set_error_func(s, stderr, handle_error);
  62
  63     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
  64     for (i = 1; i < argc; ++i) {
  65         char *a = argv[i];
  66         if (a[0] == '-') {
  67             if (a[1] == 'B')
  68                 tcc_set_lib_path(s, a+2);
  69             else if (a[1] == 'I')
  70                 tcc_add_include_path(s, a+2);
  71             else if (a[1] == 'L')
  72                 tcc_add_library_path(s, a+2);
  73         }
  74     }
  75
  76     /* MUST BE CALLED before any compilation */
  77     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
  78
  79     if (tcc_compile_string(s, my_program) == -1)
  80         return 1;
  81
  82     /* as a test, we add symbols that the compiled program can use.
  83        You may also open a dll with tcc_add_dll() and use symbols from that */
  84     tcc_add_symbol(s, "add", add);
  85     tcc_add_symbol(s, "hello", hello);
  86
  87     /* relocate the code */
  88     if (tcc_relocate(s) < 0)
  89         return 1;
  90
  91     /* get entry symbol */
  92     func = tcc_get_symbol(s, "foo");
  93     if (!func)
  94         return 1;
  95
  96     /* run the code */
  97     func(32);
  98
  99     /* delete the state */
 100     tcc_delete(s);
 101
 102     return 0;
 103 }