diff options
Diffstat (limited to 'tests/bf/bf.toc')
| -rw-r--r-- | tests/bf/bf.toc | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/tests/bf/bf.toc b/tests/bf/bf.toc new file mode 100644 index 0000000..ef0c086 --- /dev/null +++ b/tests/bf/bf.toc @@ -0,0 +1,108 @@ +getstdin @= fn() []char { + contents : []char; + contents_sz : int; + contents_len : int; + buffer : [1024]char; + while #C("fgets(buffer, 1024, stdin)") { + buffer_len : int; + while buffer[buffer_len] { + buffer_len = buffer_len + 1; + } + if contents_sz < contents_len + buffer_len { + old_contents := contents; + contents_sz = 2*contents_sz + 1024; + contents = new(char, contents_sz); + i := 0; + while i < contents_len { + contents[i] = old_contents[i]; + i = i + 1; + } + del(old_contents); + } + i := 0; + while i < buffer_len { + contents[contents_len] = buffer[i]; + contents_len = contents_len + 1; + i = i + 1; + } + } + contents[contents_len] = 0 as char; + contents +}; + +puti @= fn(x: int) { + #C("printf(\"%ld\\n\", x)"); +}; + +main @= fn() { + code := getstdin(); + tape_sz := 3; + tape := new(int, tape_sz); + ptr := tape_sz / 2; + i := 0; + while code[i] { + // puti(ptr); + // puti(tape_sz); + if code[i] == '+' { + tape[ptr] = tape[ptr]+1; + } elif code[i] == '-' { + tape[ptr] = tape[ptr]-1; + } elif code[i] == '>' { + ptr = ptr + 1; + if ptr >= tape_sz { + // extend to the right + newtape := new(int, 2*tape_sz); + j := 0; + while j < tape_sz { + newtape[j] = tape[j]; + j = j + 1; + } + tape_sz = tape_sz * 2; + del(tape); + tape = newtape; + } + } elif code[i] == '<' { + ptr = ptr - 1; + if ptr < 0 { + // extend to the left + newtape := new(int, 2*tape_sz); + j := 0; + while j < tape_sz { + newtape[j+tape_sz] = tape[j]; + j = j + 1; + } + tape_sz = tape_sz * 2; + del(tape); + tape = newtape; + ptr = ptr + tape_sz; + } + } elif code[i] == '[' { + if !tape[ptr] { + // jump to matching ] + level := 0; + while level >= 0 { + i = i + 1; + level = level + (if code[i] == '[' { 1 } elif code[i] == ']' { -1 } else {0}); + } + } + } elif code[i] == ']' { + if tape[ptr] { + // jump to matching [ + level := 0; + while level <= 0 { + i = i - 1; + level = level + (if code[i] == '[' { 1 } elif code[i] == ']' { -1 } else {0}); + } + } + } elif code[i] == '.' { + c := tape[ptr] as char; + #C("putc(c, stdout)"); + } elif code[i] == ',' { + // Input doesn't really work, because you + // need to send an EOF to end the program. + } + i = i + 1; + } + del(tape); + del(code); +};
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