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| #include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "token.h"
#include "utils.h"
/* State of the parser/modifier. */
FILE *fout_c = NULL;
FILE *fout_h = NULL;
FILE *fdefer[128] = {NULL};
int fdefer_count = 0;
int defer_nonpop = 0;
int lambda_count = 0;
int parse_tok(struct Tok *tok, int n, FILE *fout);
int parse_lambda(struct Tok *tok, int n, FILE *fout) {
int lambda_idx = lambda_count++;
fprintf(fout, "lambda_%d", lambda_idx);
FILE *ftmp = tmpfile();
int bbr = 0;
int ebr = 0;
int i = 1;
fprintf(ftmp, "static");
while (!((ebr == bbr) && ebr)) {
if (ARROW_LEFT == tok[i].type) {
fprintf(ftmp, "lambda_%d", lambda_idx);
++i;
continue;
} else {
if (CURLY_BEGIN == tok[i].type) {
++bbr;
}
if (CURLY_END == tok[i].type) {
++ebr;
}
i += parse_tok(&tok[i], n - i, ftmp);
}
}
fprintf(fout_h, "\n");
tmpflush(fout_h, ftmp);
fclose(ftmp);
return i;
}
int parse_defer(struct Tok *tok, int n, FILE *fout) {
int i = 1;
while (i < n) {
if (SEMICOLON == tok[i].type) {
fprintf(fdefer[fdefer_count-1], ";");
++i;
break;
}
i += parse_tok(&tok[i], n-i, fdefer[fdefer_count-1]);
}
return i;
}
void defer_push() {
fdefer[fdefer_count++] = tmpfile();
}
void defer_pop(FILE *fout) {
if (defer_nonpop) {
defer_nonpop = 0;
return;
}
tmpflush(fout, fdefer[fdefer_count - 1]);
fclose(fdefer[--fdefer_count]);
}
void defer_flush(FILE *fout) {
for (int i = fdefer_count - 1; i >= 0; --i) {
tmpflush(fout, fdefer[i]);
}
fclose(fdefer[--fdefer_count]);
defer_nonpop = 1;
}
int parse_tok(struct Tok *tok, int n, FILE *fout) {
if (n) {
if (LAMBDA == tok[0].type) {
return parse_lambda(tok, n, fout);
}
if (DEFER == tok[0].type) {
return parse_defer(tok, n, fout);
}
if (CURLY_BEGIN == tok[0].type) {
defer_push();
}
if (CURLY_END == tok[0].type) {
defer_pop(fout);
}
if (RETURN == tok[0].type) {
defer_flush(fout);
}
fprintf(fout, "%.*s", (int)(tok->end - tok->begin), tok->begin);
return 1;
}
return 0;
}
void parse(struct Tok *tok, long nt) {
if (tok) {
int it = 0;
while (it < nt) {
int progress;
it += progress = parse_tok(&tok[it], nt - it, fout_c);
if (0 == progress) {
fprintf(stderr, "Break.\n");
break;
}
}
}
}
int main(int argc, char **argv)
{
FILE *fin = NULL;
if (argc < 4) {
printf ("Usage: cea FILE_C_IN FILE_C_OUT FILE_H_OUT\n");
return 1;
}
fin = fopen(argv[1], "r");
fout_c = fopen(argv[2], "w");
fout_h = fopen(argv[3], "w");
long n = 0;
char *a = readf(fin, &n);
long nt = 0;
struct Tok *tok = tokenize(a, n, &nt);
parse(tok, nt);
free(tok);
free(a);
fclose(fin);
fclose(fout_c);
fclose(fout_h);
return 0;
}
|