int main(int argc, char **argv) { if (argc == 1) { /* given a specific constant name, get and print its value */ char name[] = "CTR_COUNTER_BIG_ENDIAN"; int value; char *names_list; unsigned int names_list_len; if (crypt_get_constant(name, &value) != 0) exit(EXIT_FAILURE); printf("\n %s is %d \n\n", name, value); /* get and print the length of the names (and values) list */ if (crypt_list_all_constants(NULL, &names_list_len) != 0) exit(EXIT_FAILURE); printf(" need to allocate %u bytes \n\n", names_list_len); /* get and print the names (and values) list */ if ((names_list = malloc(names_list_len)) == NULL) exit(EXIT_FAILURE); if (crypt_list_all_constants(names_list, &names_list_len) != 0) exit(EXIT_FAILURE); printf(" supported constants:\n\n%s\n\n", names_list); free(names_list); } else if (argc == 2) { if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) { char* base = strdup(basename(argv[0])); printf("Usage: %s [-a] [-s name]\n\n", base); _print_line("<no argument>", "The old behavior of the demo"); _print_line("-a", "Only lists all constants"); _print_line("-s name", "List a single constant given as argument"); _print_line("-h", "The help you're looking at"); free(base); } else if (strcmp(argv[1], "-a") == 0) { char *names_list; unsigned int names_list_len; /* get and print the length of the names (and values) list */ if (crypt_list_all_constants(NULL, &names_list_len) != 0) exit(EXIT_FAILURE); /* get and print the names (and values) list */ if ((names_list = malloc(names_list_len)) == NULL) exit(EXIT_FAILURE); if (crypt_list_all_constants(names_list, &names_list_len) != 0) exit(EXIT_FAILURE); printf("%s\n", names_list); free(names_list); } } else if (argc == 3) { if (strcmp(argv[1], "-s") == 0) { int value; if (crypt_get_constant(argv[2], &value) != 0) exit(EXIT_FAILURE); printf("%s,%u\n", argv[2], value); } } return 0; }
int main(void) { // given a specific constant name, get and print its value char name[] = "CTR_COUNTER_BIG_ENDIAN"; int value; if (crypt_get_constant(name, &value) != 0) exit(EXIT_FAILURE); printf("\n %s is %d \n\n", name, value); // get and print the length of the names (and values) list char *names_list; unsigned long names_list_len; if (crypt_list_all_constants(NULL, &names_list_len) != 0) exit(EXIT_FAILURE); printf(" need to allocate %lu bytes \n\n", names_list_len); // get and print the names (and values) list if ((names_list = malloc(names_list_len)) == NULL) exit(EXIT_FAILURE); if (crypt_list_all_constants(names_list, &names_list_len) != 0) exit(EXIT_FAILURE); printf(" supported constants:\n\n%s\n\n", names_list); free(names_list); return 0; }