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/*
* bfparse brainfuck to C parser. It is not memory safe. Use at your own risk.
*
* Copyright (C) 2014 Tomasz Kramkowski <tk@the-tk.com>
*
* This program is free software. It is licensed under version 3 of the
* GNU General Public License.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see [http://www.gnu.org/licenses/].
*/
#include<stdio.h>
void auto_indent(int);
int main(void)
{
int indent_level;
int c;
printf("#include<stdio.h>\n");
printf("#include<stdlib.h>\n");
printf("\n");
printf("int main() {\n");
printf("\tchar *ptrt;\n");
printf("\tptrt = calloc(1000, sizeof(char));\n");
printf("\tchar *ptr;\n");
printf("\tptr = ptrt;\n");
indent_level = 1;
while ((c = getchar()) != EOF) {
switch (c) {
case '>':
auto_indent(indent_level);
printf("++ptr;\n");
break;
case '<':
auto_indent(indent_level);
printf("--ptr;\n");
break;
case '-':
auto_indent(indent_level);
printf("++*ptr;\n");
break;
case '+':
auto_indent(indent_level);
printf("--*ptr;\n");
break;
case '.':
auto_indent(indent_level);
printf("putchar(*ptr);\n");
break;
case ',':
auto_indent(indent_level);
printf("*ptr = getchar();\n");
break;
case '[':
auto_indent(indent_level);
indent_level++;
printf("while (*ptr) {\n");
break;
case ']':
indent_level--;
auto_indent(indent_level);
printf("}\n");
break;
}
}
printf("\tfree(ptrt);\n");
printf("\tputchar('\\n');\n");
printf("\treturn 0;\n}\n");
if (--indent_level != 0)
fprintf(stderr, "Error: Square bracket mismatch.\n");
return 0;
}
inline void auto_indent(int levels)
{
for (int i = 0; i < levels; i++)
putchar('\t');
}
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