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-rw-r--r--bruiser/bruiserffi.c119
1 files changed, 106 insertions, 13 deletions
diff --git a/bruiser/bruiserffi.c b/bruiser/bruiserffi.c
index d4d531d..6be7376 100644
--- a/bruiser/bruiserffi.c
+++ b/bruiser/bruiserffi.c
@@ -18,12 +18,99 @@ You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*/
/**********************************************************************************************************************/
+// @TODO-structs and unions not supported
+// @TODO-vararg xobjs are not supported
+/**********************************************************************************************************************/
#include <ffi.h>
+#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "bruiserffi.h"
/**********************************************************************************************************************/
+#define VOIDIFY(X) (void*)X
+/**********************************************************************************************************************/
+#define REINTERPRET_GENERATOR(X) \
+ X ffi_reinterpret_##X(void* result) {return (X)result;}
+
+#define X_LIST_GEN \
+ X(uint8_t, "uint8_t")\
+ X(uint16_t, "uint8_t")\
+ X(uint32_t, "uint8_t")\
+ X(uint64_t, "uint8_t")\
+ X(int8_t, "uint8_t")\
+ X(int16_t, "uint8_t")\
+ X(int32_t, "uint8_t")\
+ X(int64_t, "uint8_t")\
+ X(uintptr_t, "uint8_t")\
+ //X(float, "uint8_t")\
+ X(double, "uint8_t")
+
+#define X(X1,X2) REINTERPRET_GENERATOR(X1)
+X_LIST_GEN
+#undef X
+#undef X_LIST_GEN
+#undef REINTERPRET_GENERATOR
+
+void ffi_value_ctor(void** ret, int argc, ...) {
+ va_list value_list;
+ char* arg_string;
+ uint16_t counter = 0U;
+
+ va_start(value_list, argc);
+ for (int i = 0; i < argc; ++i) {
+ arg_string = va_arg(value_list, char*);
+ if (strcmp(arg_string, "uint8") == 0) {
+ uint8_t* dummy = va_arg(value_list, uint8_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "sint8") == 0) {
+ int8_t* dummy = va_arg(value_list, int8_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "uint16") == 0) {
+ uint16_t* dummy = va_arg(value_list, uint16_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "sint16") == 0) {
+ int16_t* dummy = va_arg(value_list, int16_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "uint32") == 0) {
+ uint32_t* dummy = va_arg(value_list, uint32_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "sint32") == 0) {
+ int32_t* dummy = va_arg(value_list, int32_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "uint64") == 0) {
+ uint64_t* dummy = va_arg(value_list, uint64_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "sint64") == 0) {
+ int64_t* dummy = va_arg(value_list, int64_t*);
+ ret[counter] = VOIDIFY(dummy);
+ }
+ else if (strcmp(arg_string, "float") == 0) {
+ float* dummy = va_arg(value_list, float*);
+ ret[counter] = dummy;
+ }
+ else if (strcmp(arg_string, "double") == 0) {
+ double* dummy = va_arg(value_list, double*);
+ ret[counter] = dummy;
+ }
+ else if (strcmp(arg_string, "pointer") == 0) {
+ ret[counter] = va_arg(value_list, void*);
+ }
+ else {
+ ret[counter] = NULL;
+ fprintf(stderr, "got garbage arg value string...\n");
+ }
+ counter++;
+ }
+}
+
ffi_type* ffi_type_ctor(const char* arg_string) {
if (strcmp(arg_string, "void") == 0) {return &ffi_type_void;}
else if (strcmp(arg_string, "uint8") == 0) {return &ffi_type_uint8;}
@@ -45,16 +132,17 @@ ffi_type* ffi_type_ctor(const char* arg_string) {
}
}
-void* ffi_callX(int argc, const char** arg_string, ffi_type rtype, void* x_ptr, const char* ret_type) {
+void* ffi_callX(int argc, const char** arg_string, ffi_type rtype, void* x_ptr, void** values) {
ffi_status status;
ffi_cif cif;
ffi_type* args_types[argc];
+ void* ret;
+
for (int i = 0; i < argc; ++i) {
if (ffi_type_ctor(arg_string[i])) args_types[i] = ffi_type_ctor(arg_string[i]);
}
- //status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI, argc, &rtype, args);
- status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI, argc, &ffi_type_uint32, args_types);
+ status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI, argc, &rtype, args_types);
if (status == FFI_BAD_TYPEDEF) {
fprintf(stderr, "ffi_prep_cif returned FFI_BAD_TYPEDEF: %d\n", status);
return NULL;
@@ -68,32 +156,37 @@ void* ffi_callX(int argc, const char** arg_string, ffi_type rtype, void* x_ptr,
return NULL;
}
- uint32_t a = 30;
- uint32_t b = 20;
- void* ret;
- //void* values[argc]; //FIXME the actual arguments
- void* values[2] = {&a, &b};
ffi_call(&cif, FFI_FN(x_ptr), &ret, values);
return ret;
}
-void* ffi_callX_var(int argc, const char** arg_string, ffi_type rtype, void* x_ptr, const char* ret_type) {}
+void* ffi_callX_var(int argc, const char** arg_string, ffi_type rtype, void* x_ptr, void** values) {}
/**********************************************************************************************************************/
// @DEVI-the following lines are only meant for testing.
uint32_t add2(uint32_t a, uint32_t b) {return a+b;}
uint32_t sub2(uint32_t a, uint32_t b) {return a-b;}
+#pragma weak main
int main(int argc, char** argv) {
+ // @DEVI-we get these from lua
void* padd = &add2;
void* psub = &sub2;
+ // @DEVI-user input from lua
int argcount = 2;
+ // @DEVI-we get these from user in lua
ffi_type ret_type = ffi_type_uint32;
+ // @DEVI-we get these from user in lua
const char* args[] = {"uint32", "uint32"};
const char* ret_string = "uint32";
+ uint32_t a = 30;
+ uint32_t b = 20;
+ void* values[2];
+ // @DEVI-we get thsese from the user in lua
+ ffi_value_ctor(values, 2, "uint32", &a, "uint32", &b);
- void* result = ffi_callX(argcount, args, ret_type, psub, ret_string);
- fprintf(stdout, "first result %d\n", (uint32_t)result);
- result = ffi_callX(argcount, args, ret_type, padd, ret_string);
- fprintf(stdout, "first result %d\n", (uint32_t)result);
+ void* result = ffi_callX(argcount, args, ret_type, padd, values);
+ fprintf(stdout, "result of callling add is %d\n", (uint32_t)result);
+ result = ffi_callX(argcount, args, ret_type, psub, values);
+ fprintf(stdout, "result of calling sub is %d\n", (uint32_t)result);
return 0;
}
/**********************************************************************************************************************/