diff options
| -rw-r--r-- | README | 5 | ||||
| -rw-r--r-- | brainfuck.c | 31 | ||||
| -rw-r--r-- | clear-cell.bf | 5 |
3 files changed, 35 insertions, 6 deletions
@@ -18,7 +18,10 @@ Output formats for operator '.': if omitted read stdin Standard operators: <>+-[]., -Extensions: ciuox - change format output (same as -c & others, see above) +Extensions: + ciuox - change format output (same as -c & others, see above) + ; - end of code (usefull when reading stdin) + # - comment to the end of line (usefull when reading files) Example: echo '+++[.-]' | ./brainfuck diff --git a/brainfuck.c b/brainfuck.c index ba573db..79ff0e5 100644 --- a/brainfuck.c +++ b/brainfuck.c @@ -24,17 +24,30 @@ char format = 'u'; unsigned int cp = 0; unsigned int dp = 0; unsigned int sp = 0; +char ignore [] = "\t\r\n "; + void read_code() { - int allocated, n, c; + int allocated, n, c, comment; allocated = 1000; n = 0; code = (char*) malloc(allocated * sizeof(char)); + comment = 0; while (EOF != (c = getc(prog))) { + if (c == ';') /* end of code */ + break; + else if (c == '#') + comment = 1; + else if (c == '\n' || c == '\r') + comment = 0; + + if (comment || (NULL != strchr(ignore, c))) + continue; + if (n >= allocated) { allocated <<= 1; @@ -103,10 +116,15 @@ void pop_cp() int skip() { + int ob = 0; while (code[cp] != '\0') { - if (code[++cp] == ']') - return 1; + switch (code[cp]) + { + case '[': ++ob; break; + case ']': --ob; if (0 == ob) return 1; + } + ++cp; } return 0; } @@ -129,7 +147,7 @@ void run_code() char cmd; while ('\0' != (cmd = code[cp])) { - /*fprintf(stderr, "%c", cmd);*/ + /* fprintf(stderr, "%c", cmd); */ switch (cmd) { case '[': if (data[dp]) @@ -187,7 +205,10 @@ void usage(char * self) printf(" if omitted read stdin\n"); printf("\n"); printf("Standard operators: <>+-[].,\n"); - printf("Extensions: ciuox - change format output (same as -c & others, see above)\n"); + printf("Extensions:\n"); + printf(" ciuox - change format output (same as -c & others, see above)\n"); + printf(" ; - end of code (usefull when reading stdin)\n"); + printf(" # - comment to the end of line (usefull when reading files)\n"); printf("\n"); printf("Example:\n"); printf(" echo '+++[.-]' | %s\n", self); diff --git a/clear-cell.bf b/clear-cell.bf new file mode 100644 index 0000000..1376939 --- /dev/null +++ b/clear-cell.bf @@ -0,0 +1,5 @@ ++++++ +. +[-] +. + |