97 lines
3.6 KiB
C
97 lines
3.6 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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int main(int argc, char **argv) {
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FILE *input;
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char *line = NULL;
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size_t line_buf_length = 0;
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if (argc == 1 || argv[1][0] == '-')
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input = stdin;
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else if ((input = fopen(argv[1], "r")) == NULL) {
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fprintf(stderr, "Cannot open file %s\n", argv[1]);
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return -1;
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}
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uint64_t calibration_value = 0;
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while (getline(&line, &line_buf_length, input) != -1) {
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uint64_t current_calibration_value = 0;
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int8_t last_digit = 0;
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for (size_t i = 0; i < line_buf_length-1; ++i)
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if (line[i]>>4 == 0x3) {
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if (current_calibration_value == 0)
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current_calibration_value = (line[i]&0xf) * 10;
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last_digit = line[i]&0xf;
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} else {
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uint8_t digit = 0;
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switch (line[i]) {
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case 'o': // 1
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if (i+2 <= line_buf_length)
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if (line[i+1] == 'n' && line[i+2] == 'e')
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digit = 1;
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break;
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case 't': // 2 3
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if (i+2 <= line_buf_length)
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if (line[i+1] == 'w' && line[i+2] == 'o') {
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digit = 2;
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break;
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}
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if (i+4 <= line_buf_length)
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if (line[i+1] == 'h' && line[i+2] == 'r' && line[i+3] == 'e' && line[i+4] == 'e')
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digit = 3;
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break;
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case 'f': // 4 5
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if (i+3 <= line_buf_length)
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if (line[i+1] == 'o' && line[i+2] == 'u' && line[i+3] == 'r') {
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digit = 4;
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break;
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}
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if (i+3 <= line_buf_length)
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if (line[i+1] == 'i' && line[i+2] == 'v' && line[i+3] == 'e')
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digit = 5;
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break;
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case 's': // 6 7
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if (i+2 <= line_buf_length)
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if (line[i+1] == 'i' && line[i+2] == 'x') {
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digit = 6;
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break;
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}
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if (i+4 <= line_buf_length)
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if (line[i+1] == 'e' && line[i+2] == 'v' && line[i+3] == 'e' && line[i+4] == 'n')
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digit = 7;
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break;
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case 'e': // 8
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if (i+4 <= line_buf_length)
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if (line[i+1] == 'i' && line[i+2] == 'g' && line[i+3] == 'h' && line[i+4] == 't')
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digit = 8;
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break;
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case 'n': // 9
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if (i+3 <= line_buf_length)
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if (line[i+1] == 'i' && line[i+2] == 'n' && line[i+3] == 'e')
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digit = 9;
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break;
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}
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if (digit != 0) {
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if (current_calibration_value == 0)
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current_calibration_value = digit * 10;
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last_digit = digit;
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}
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}
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if (current_calibration_value != 0)
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calibration_value += current_calibration_value + last_digit;
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memset(line, 0, line_buf_length);
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}
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printf("%lu\n", calibration_value);
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return 0;
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} |