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/*
* Copyright (C) 2021 Jo-Philipp Wich <jo@mein.io>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <ucode/compiler.h>
#include <ucode/lib.h>
#include <ucode/vm.h>
#define MULTILINE_STRING(...) #__VA_ARGS__
static const char *program = MULTILINE_STRING(
{%
print("add() = " + add(5, 3.1, 2) + "\n");
print("multiply() = " + multiply(7.3, 5) + "\n");
%}
);
static uc_parse_config_t config = {
.strict_declarations = false,
.lstrip_blocks = true,
.trim_blocks = true
};
static uc_value_t *
multiply_two_numbers(uc_vm_t *vm, size_t nargs)
{
uc_value_t *x = uc_fn_arg(0);
uc_value_t *y = uc_fn_arg(1);
return ucv_double_new(ucv_to_double(x) * ucv_to_double(y));
}
static uc_value_t *
add_all_numbers(uc_vm_t *vm, size_t nargs)
{
double res = 0.0;
for (size_t n = 0; n < nargs; n++)
res += ucv_to_double(uc_fn_arg(n));
return ucv_double_new(res);
}
int main(int argc, char **argv)
{
int exit_code = 0;
/* create a source buffer containing the program code */
uc_source_t *src = uc_source_new_buffer("my program", strdup(program), strlen(program));
/* compile source buffer into function */
char *syntax_error = NULL;
uc_function_t *progfunc = uc_compile(&config, src, &syntax_error);
/* release source buffer */
uc_source_put(src);
/* check if compilation failed */
if (!progfunc) {
fprintf(stderr, "Failed to compile program: %s\n", syntax_error);
return 1;
}
/* initialize VM context */
uc_vm_t vm = { 0 };
uc_vm_init(&vm, &config);
/* load standard library into global VM scope */
uc_stdlib_load(uc_vm_scope_get(&vm));
/* register our native functions as "add" and "multiply" */
uc_function_register(uc_vm_scope_get(&vm), "add", add_all_numbers);
uc_function_register(uc_vm_scope_get(&vm), "multiply", multiply_two_numbers);
/* execute program function */
int return_code = uc_vm_execute(&vm, progfunc, NULL);
/* handle return status */
if (return_code == ERROR_COMPILE || return_code == ERROR_RUNTIME) {
printf("An error occurred while running the program\n");
exit_code = 1;
}
/* free VM context */
uc_vm_free(&vm);
return exit_code;
}
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