54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
#include <assert.h>
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#include <inttypes.h>
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#include <stdio.h>
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void pair(size_t count, uint8_t byte)
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{
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static size_t unique_count = 0;
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static uint8_t unique_data[15];
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if (count == 1) {
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unique_data[unique_count++] = byte;
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assert(unique_count <= 15);
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}
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else {
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assert(count <= 15);
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uint8_t control = (count << 4) | unique_count;
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putchar(control);
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for (size_t i = 0; i < unique_count; i++) {
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putchar(unique_data[i]);
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}
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if (count != 0) {
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putchar(byte);
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}
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else {
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assert(control == 0);
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}
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unique_count = 0;
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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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size_t count = 1;
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uint8_t byte = getchar();
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int new;
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size_t position = 0;
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while ((new = getchar()) != EOF) {
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if (byte == new) {
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count++;
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}
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else {
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pair(count, byte);
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byte = new;
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count = 1;
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}
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}
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pair(count, byte);
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pair(0, 0);
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}
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