1 /* 2 * Copyright (C) 2021 Jo-Philipp Wich <jo@mein.io> 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <stdio.h> 18 19 #include <ucode/compiler.h> 20 #include <ucode/lib.h> 21 #include <ucode/vm.h> 22 23 24 #define MULTILINE_STRING(...) #__VA_ARGS__ 25 26 static const char *program_code = MULTILINE_STRING( 27 {% 28 let n = global.value || 1; 29 30 print("Current value is " + n + "\n"); 31 32 global.value = n * 2; 33 %} 34 ); 35 36 static uc_parse_config_t config = { 37 .strict_declarations = false, 38 .lstrip_blocks = true, 39 .trim_blocks = true 40 }; 41 42 int main(int argc, char **argv) 43 { 44 int exit_code = 0; 45 46 /* create a source buffer containing the program code */ 47 uc_source_t *src = uc_source_new_buffer("my program", strdup(program_code), strlen(program_code)); 48 49 /* compile source buffer into function */ 50 char *syntax_error = NULL; 51 uc_program_t *program = uc_compile(&config, src, &syntax_error); 52 53 /* release source buffer */ 54 uc_source_put(src); 55 56 /* check if compilation failed */ 57 if (!program) { 58 fprintf(stderr, "Failed to compile program: %s\n", syntax_error); 59 free(syntax_error); 60 61 return 1; 62 } 63 64 /* initialize default module search path */ 65 uc_search_path_init(&config.module_search_path); 66 67 /* initialize VM context */ 68 uc_vm_t vm = { 0 }; 69 uc_vm_init(&vm, &config); 70 71 /* load standard library into global VM scope */ 72 uc_stdlib_load(uc_vm_scope_get(&vm)); 73 74 /* execute compiled program function five times */ 75 for (int i = 0; i < 5; i++) { 76 printf("Iteration %d: ", i + 1); 77 78 /* execute program function */ 79 int return_code = uc_vm_execute(&vm, program, NULL); 80 81 /* handle return status */ 82 if (return_code == ERROR_COMPILE || return_code == ERROR_RUNTIME) { 83 printf("An error occurred while running the program\n"); 84 exit_code = 1; 85 break; 86 } 87 88 /* perform GC step */ 89 ucv_gc(&vm); 90 } 91 92 /* release program function */ 93 uc_program_put(program); 94 95 /* free VM context */ 96 uc_vm_free(&vm); 97 98 /* free search module path vector */ 99 uc_search_path_free(&config.module_search_path); 100 101 return exit_code; 102 } 103
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