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src/tests/exsymtab/30-two-contexts-struct-share.c  view on Meta::CPAN

/*
 * Share struct definitions between two contexts.
 */

/* uncomment to enable diagnostic output */
//      #define DIAG(...) diag(__VA_ARGS__)

#define INCLUDE_MALLOC
#include "test_setup.h"

char first_code[] =
"void * malloc(int);\n"
"void free(void *);\n"
"struct point {\n"
"    int x;\n"
"    int yval;\n"
"};\n"
"void * new_point(int x, int newy) {\n"
"    struct point * pt = malloc(sizeof(struct point));\n"
"    pt->x = x;\n"
"    pt->yval = newy;\n"
"    return pt;\n"
"}\n"
;

char second_code[] =
"int sq_distance_to_pt(struct point * pt) {\n"
"    return (pt->x) * (pt->x) + (pt->yval) * (pt->yval);\n"
"}\n"
;

int main(int argc, char **argv)
{
    /* ---- Compile the first code string and setup the callback data ---- */

    TCCState *s1 = tcc_new();
    extended_symtab_p my_symtab;
    setup_and_compile_s1(my_symtab, first_code);
    SETUP_SECOND_CALLBACK_DATA();

    /* ---- Allocate a point and manually unpack it ---- */
    void* (*allocate_ptr)(int, int) = tcc_get_symbol(s1, "new_point");
    if (allocate_ptr == NULL) return 1;

    void * point_p = allocate_ptr(6, 9);
    if (point_p == NULL) {
        fail("Unable to allocate point");
        return 1;
    }
    else
        pass("Allocated point");

    int * manual_unpack = point_p;
    is_i(manual_unpack[0], 6, "manually unpacked x-value");
    is_i(manual_unpack[1], 9, "manually unpacked y-value");

    /* ---- Compile the second compiler context ---- */
    TCCState * s_second = tcc_new();
    setup_and_relocate_second_state(s_second, second_code);
    int (*sq_dist_ptr)(void*) = tcc_get_symbol(s_second, "sq_distance_to_pt");
    if (sq_dist_ptr == NULL) return 1;
    is_i(sq_dist_ptr(point_p), 9*9+6*6, "Second context able to unpack struct");

    /* ---- clean up the memory ---- */
    tcc_delete_extended_symbol_table(my_symtab);
    tcc_delete(s1);
    tcc_delete(s_second);
    free(point_p);
    pass("cleanup");

    return done_testing();
}