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49 lines
786 B
49 lines
786 B
20 years ago
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#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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