48 lines
786 B
48 lines
786 B
#include <stdio.h> |
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#include <string.h> |
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#include <ctype.h> |
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/* |
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* Remove empty lines from the beginning and end. |
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* |
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* Turn multiple consecutive empty lines into just one |
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* empty line. |
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*/ |
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static void cleanup(char *line) |
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{ |
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int len = strlen(line); |
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if (len > 1 && line[len-1] == '\n') { |
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do { |
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unsigned char c = line[len-2]; |
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if (!isspace(c)) |
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break; |
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line[len-2] = '\n'; |
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len--; |
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line[len] = 0; |
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} while (len > 1); |
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} |
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} |
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int main(int argc, char **argv) |
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{ |
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int empties = -1; |
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char line[1024]; |
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while (fgets(line, sizeof(line), stdin)) { |
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cleanup(line); |
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/* Not just an empty line? */ |
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if (line[0] != '\n') { |
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if (empties > 0) |
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putchar('\n'); |
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empties = 0; |
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fputs(line, stdout); |
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continue; |
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} |
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if (empties < 0) |
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continue; |
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empties++; |
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} |
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return 0; |
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}
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