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#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lexer.h"
#include "common.h"
#include "error.h"
#include "logic.h"
#include "gate.h"
static FILE* fd;
static struct token *cursor;
#ifdef emit_error
#warning "Remember to remove the global emit_error"
#undef emit_error
#endif /* ifdef emit_error */
#define emit_error(...) fprintf(stderr, "Error (%zd,%zd): ", cursor->loc.line, cursor->loc.column);\
fprintf(stderr, __VA_ARGS__);\
indicate_file_area(fd, cursor->loc.line, cursor->loc.column, cursor->span)
//static struct op_lookup uop_handlers[] = {
// {.str = "not", .handler = logic_nand},
//};
//
//static struct op_lookup bop_handlers[] = {
// {.str = "and", .handler = logic_and},
// {.str = "or", .handler = logic_or},
// {.str = "nand", .handler = logic_nand},
// {.str = "nor", .handler = logic_nor},
// {.str = "xor", .handler = logic_xor}
//};
//
//static struct tok_lookup tok_handlers[] = {
// {.str = "input", .handler = parse_input},
// {.str = "module", .handler = parse_module},
// {.str = "expr", .handler = parse_expr}
//};
static int
expect(enum TOKEN_TYPE e) {
char *expected_desc = "(internal error)";
char *observed_desc = "(internal error)";
if (cursor->type != e) {
expected_desc = get_token_description(e);
observed_desc = get_token_description(cursor->type);
emit_error("Expected %s, got %s\n", expected_desc, observed_desc);
return 1;
}
return 0;
}
static void
kerchunk() {
cursor = cursor->next;
}
int
parse(FILE *f, struct token *t) {
char *token_desc = "(internal error)";
fd = f;
cursor = t;
if (expect(TOK_MODULE)) {
return 1;
}
kerchunk();
if (expect(TOK_IDENT)) {
return 1;
}
emit_error("Debug: module is named %s\n", cursor->value);
kerchunk();
if (expect(TOK_EOL)) {
return 1;
}
kerchunk();
while (cursor) {
switch(cursor->type) {
case TOK_EOL:
kerchunk();
break;
/* FIXME implement everything */
default:
token_desc = get_token_description(cursor->type);
emit_error("Unexpected %s\n", token_desc);
return 1;
}
}
return 0;
}
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