40 lines
708 B
C
40 lines
708 B
C
#include "readline.h"
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#include <stdlib.h>
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#include <stdio.h>
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char *read_line(FILE *file) {
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int length = 0, size = 128;
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char *string = malloc(size);
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if (!string) {
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return NULL;
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}
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while (1) {
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int c = getc(file);
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if (c == EOF || c == '\n' || c == '\0') {
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break;
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}
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if (c == '\r') {
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continue;
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}
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if (length == size) {
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char *new_string = realloc(string, size *= 2);
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if (!new_string) {
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free(string);
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return NULL;
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}
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string = new_string;
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}
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string[length++] = c;
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}
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if (length + 1 == size) {
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char *new_string = realloc(string, length + 1);
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if (!new_string) {
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free(string);
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return NULL;
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}
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string = new_string;
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}
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string[length] = '\0';
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return string;
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}
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