diff options
| -rw-r--r-- | brainfuck.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/brainfuck.c b/brainfuck.c index ceb52c4..5cd021e 100644 --- a/brainfuck.c +++ b/brainfuck.c | |||
| @@ -8,6 +8,7 @@ typedef struct brainfuck{ | |||
| 8 | char command[MAX_DATA]; | 8 | char command[MAX_DATA]; |
| 9 | char *ptr; | 9 | char *ptr; |
| 10 | int count; | 10 | int count; |
| 11 | int num; | ||
| 11 | }bf; | 12 | }bf; |
| 12 | 13 | ||
| 13 | bf one; | 14 | bf one; |
| @@ -17,6 +18,7 @@ void init() | |||
| 17 | char c; | 18 | char c; |
| 18 | memset(&one, 0, sizeof(one)); | 19 | memset(&one, 0, sizeof(one)); |
| 19 | one.count = 0; | 20 | one.count = 0; |
| 21 | one.num = 0; | ||
| 20 | one.ptr = one.data; | 22 | one.ptr = one.data; |
| 21 | 23 | ||
| 22 | while ((c = getchar()) != EOF) | 24 | while ((c = getchar()) != EOF) |
| @@ -25,7 +27,7 @@ void init() | |||
| 25 | break; | 27 | break; |
| 26 | one.command[++one.count] = c; | 28 | one.command[++one.count] = c; |
| 27 | } | 29 | } |
| 28 | one.command[0] = one.count; | 30 | one.num = one.count; |
| 29 | one.command[one.count] = '\0'; | 31 | one.command[one.count] = '\0'; |
| 30 | } | 32 | } |
| 31 | 33 | ||
| @@ -33,6 +35,8 @@ void run() | |||
| 33 | { | 35 | { |
| 34 | char c; | 36 | char c; |
| 35 | int i; | 37 | int i; |
| 38 | int left; | ||
| 39 | int right; | ||
| 36 | 40 | ||
| 37 | one.count = 0; | 41 | one.count = 0; |
| 38 | while (c = one.command[++one.count]) | 42 | while (c = one.command[++one.count]) |
| @@ -40,16 +44,22 @@ void run() | |||
| 40 | switch (c) | 44 | switch (c) |
| 41 | { | 45 | { |
| 42 | case '+': | 46 | case '+': |
| 43 | (*one.ptr)++; | 47 | if (*one.ptr == 255) |
| 48 | *one.ptr = 0; | ||
| 49 | else | ||
| 50 | ++*one.ptr; | ||
| 44 | break; | 51 | break; |
| 45 | case '-': | 52 | case '-': |
| 46 | (*one.ptr)--; | 53 | if (*one.ptr == 0) |
| 54 | *one.ptr = 255; | ||
| 55 | else | ||
| 56 | --*one.ptr; | ||
| 47 | break; | 57 | break; |
| 48 | case '>': | 58 | case '>': |
| 49 | one.ptr++; | 59 | ++one.ptr; |
| 50 | break; | 60 | break; |
| 51 | case '<': | 61 | case '<': |
| 52 | one.ptr--; | 62 | --one.ptr; |
| 53 | break; | 63 | break; |
| 54 | case ',': | 64 | case ',': |
| 55 | *one.ptr = getchar(); | 65 | *one.ptr = getchar(); |
| @@ -58,31 +68,48 @@ void run() | |||
| 58 | putchar(*one.ptr); | 68 | putchar(*one.ptr); |
| 59 | break; | 69 | break; |
| 60 | case '[': | 70 | case '[': |
| 71 | left = 0; | ||
| 61 | if (*one.ptr != 0) | 72 | if (*one.ptr != 0) |
| 62 | break; | 73 | break; |
| 63 | else | 74 | else |
| 64 | { | 75 | { |
| 65 | for (i = one.count + 1; i <= one.command[0]; i++) | 76 | for (i = one.count + 1; i <= one.num; i++) |
| 66 | { | 77 | { |
| 67 | if (one.command[i] == ']') | 78 | if (one.command[i] == '[') |
| 79 | ++left; | ||
| 80 | else if (one.command[i] == ']') | ||
| 68 | { | 81 | { |
| 69 | one.count = i; | 82 | if (left == 0) |
| 70 | break; | 83 | { |
| 84 | one.count = i; | ||
| 85 | break; | ||
| 86 | } | ||
| 87 | else | ||
| 88 | --left; | ||
| 71 | } | 89 | } |
| 90 | |||
| 72 | } | 91 | } |
| 73 | } | 92 | } |
| 74 | break; | 93 | break; |
| 75 | case ']': | 94 | case ']': |
| 95 | right = 0; | ||
| 76 | if (*one.ptr == 0) | 96 | if (*one.ptr == 0) |
| 77 | break; | 97 | break; |
| 78 | else | 98 | else |
| 79 | { | 99 | { |
| 80 | for (i = one.count - 1; i >= 1; i--) | 100 | for (i = one.count - 1; i >= 1; i--) |
| 81 | { | 101 | { |
| 82 | if (one.command[i] == '[') | 102 | if (one.command[i] == ']') |
| 103 | ++right; | ||
| 104 | else if (one.command[i] == '[') | ||
| 83 | { | 105 | { |
| 84 | one.count = i; | 106 | if (right == 0) |
| 85 | break; | 107 | { |
| 108 | one.count = i; | ||
| 109 | break; | ||
| 110 | } | ||
| 111 | else | ||
| 112 | --right; | ||
| 86 | } | 113 | } |
| 87 | } | 114 | } |
| 88 | } | 115 | } |
| @@ -97,4 +124,4 @@ int main(int argc, char **argv) | |||
| 97 | init(); | 124 | init(); |
| 98 | run(); | 125 | run(); |
| 99 | return 0; | 126 | return 0; |
| 100 | } \ No newline at end of file | 127 | } |