45 lines
991 B
C
45 lines
991 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#define INITIAL_BUFFER_SIZE 2
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char *input_buffer;
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char *aoc_read_input(void) {
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int buffer_size = INITIAL_BUFFER_SIZE;
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input_buffer = malloc(buffer_size);
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int chars_read = read(STDIN_FILENO, input_buffer, buffer_size);
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char *buffer_position = &input_buffer[chars_read];
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while (chars_read == buffer_size) {
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buffer_size *= 2;
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input_buffer = realloc(input_buffer, buffer_size);
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buffer_position = &input_buffer[chars_read];
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chars_read += read(STDIN_FILENO, buffer_position, buffer_size / 2);
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}
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input_buffer[chars_read] = 0;
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return input_buffer;
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}
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char *seek = NULL;
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char *aoc_read_line(void) {
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if (input_buffer == NULL) aoc_read_input();
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if (seek == NULL) seek = input_buffer;
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char *line_break = strstr(seek, "\n");
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if (line_break == NULL) return NULL;
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*line_break = '\0';
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char *token = seek;
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seek = line_break + 1;
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return token;
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}
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void aoc_free(void) {
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free(input_buffer);
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}
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