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| 1 | #include <stdio.h> | |
| 2 | #include <stdlib.h> | |
| 3 | #include <fcntl.h> | |
| 4 | #include <sys/mman.h> | |
| 5 | ||
| 6 | #define MAX_FILE_SIZE 65535 | |
| 7 | ||
| 8 | int main () | |
| 9 | {
| |
| 10 | int fd = open("~/input.txt",O_RDONLY,0);
| |
| 11 | void *bytes; | |
| 12 | void *byteptr; | |
| 13 | int i = 0; | |
| 14 | ||
| 15 | if (fp == -1) | |
| 16 | {
| |
| 17 | printf("File not found!\n");
| |
| 18 | exit(EXIT_FAILURE); | |
| 19 | } | |
| 20 | ||
| 21 | bytes = mmap(NULL,MAX_FILE_SIZE,PROT_READ,MAP_PRIVATE,fd,0); | |
| 22 | ||
| 23 | while ((char)*byteptr != EOF) | |
| 24 | {
| |
| 25 | char *line = malloc(256*sizeof(char)); | |
| 26 | char *lineptr = line; | |
| 27 | int line_size = 0; | |
| 28 | while (*lineptr++ = (char) *byteptr++ != '\n' && (char) *byteptr != EOF) | |
| 29 | line_size++; | |
| 30 | *lineptr = '\0'; | |
| 31 | printf("Line size: %s\nLine: %s\n",line_size,line);
| |
| 32 | i++; | |
| 33 | free(line); | |
| 34 | } | |
| 35 | ||
| 36 | munmap(bytes, MAX_FILE_SIZE); | |
| 37 | close(fd); | |
| 38 | printf("Total lines: %i\n", i);
| |
| 39 | } |