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#include <stdio.h>
#include <string.h>
#ifdef _FUSPEL_CLI
#include <argp.h>
#include <stdbool.h>
#endif
#include "eval.h"
#include "lex.h"
#include "mem.h"
#include "parse.h"
#include "print.h"
#define LINE_LENGTH 139
struct fuspel *import(struct fuspel *already_parsed, char *fname) {
struct token_list *tokens = NULL;
struct fuspel *pgm;
FILE *f;
char *fname_;
fname_ = my_calloc(1, strlen(fname) + 6);
strcpy(fname_, fname);
strcat(fname_, ".fusp");
f = fopen(fname_, "r");
if (!f) {
fprintf(stderr, "Couldn't read %s.\n", fname_);
exit(EXIT_FAILURE);
}
while (!feof(f)) {
char program[LINE_LENGTH];
if (!fgets(program, LINE_LENGTH, f)) {
if (feof(f))
break;
fprintf(stderr, "Couldn't read %s.\n", fname_);
exit(EXIT_FAILURE);
}
tokens = lex(tokens, program);
if (!tokens) {
fprintf(stderr, "Couldn't lex module %s.\n", fname);
exit(EXIT_FAILURE);
}
}
my_free(fname_);
pgm = parse(tokens);
free_token_list(tokens);
concat_fuspel(pgm, already_parsed);
return pgm;
}
#ifdef _FUSPEL_CLI
const char *argp_prog_version = "fuspel";
const char *argp_prog_bugs = "<info@camilstaps.nl>";
static char doc[] = "Interpret a fuspel program";
static char args_doc[] = "MODULE [MODULE [MODULE [..]]]";
static struct argp_option options[] = {
{ "print-program", 'P', 0, 0, "Print the parsed program before execution" },
#ifdef _FUSPEL_DEBUG
{ "debug-graphs", 'g', 0, 0, "Make a dot graph after every rewriting step" },
#endif // _FUSPEL_DEBUG
{ 0 }
};
struct environment {
struct fuspel *program;
bool printProgram;
#ifdef _FUSPEL_DEBUG
bool debugGraphs;
#endif // _FUSPEL_DEBUG
};
static error_t parse_opt(int key, char *arg, struct argp_state *state) {
struct environment *env = state->input;
switch (key) {
case 'P':
env->printProgram = true;
break;
#ifdef _FUSPEL_DEBUG
case 'g':
env->debugGraphs = true;
break;
#endif // _FUSPEL_DEBUG
case ARGP_KEY_ARG:
env->program = import(env->program, arg);
return 0;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = { options, parse_opt, args_doc, doc, 0, 0, 0 };
int main(int argc, char *argv[]) {
struct expression *result;
struct environment env;
env.printProgram = false;
env.program = NULL;
#ifdef _FUSPEL_DEBUG
env.debugGraphs = false;
#endif
argp_parse(&argp, argc, argv, 0, 0, &env);
if (!env.program) {
fprintf(stderr, "Couldn't parse program.\n");
exit(EXIT_FAILURE);
}
if (env.printProgram) {
printf("\n");
print_fuspel(env.program);
printf("\n\n");
}
#ifdef _FUSPEL_DEBUG
result = eval_main(env.program, env.debugGraphs);
#else
result = eval_main(env.program);
#endif
if (result) {
print_expression(result);
printf("\n");
free_expression(result);
my_free(result);
}
free_fuspel(env.program);
my_free(env.program);
return 0;
}
#endif // _FUSPEL_CLI
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