89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "common.h"
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const char *sofname = "uddu";
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const char *syoumei = "Unix/BeOS/Plan9 to DOS, DOS to Unix/BeOS/Plan9";
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void unix_to_dos(FILE *in, FILE *out) {
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int c;
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while ((c = fgetc(in)) != EOF) {
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if (c == '\n') fputc('\r', out);
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fputc(c, out);
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}
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}
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void dos_to_unix(FILE *in, FILE *out) {
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int c;
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while ((c = fgetc(in)) != EOF) {
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if (c == '\r') continue;
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fputc(c, out);
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}
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}
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int detect_line_ending(FILE *in) {
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int c;
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int islf = 0;
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int iscr = 0;
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while ((c = fgetc(in)) != EOF) {
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if (c == '\r') iscr = 1;
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if (c == '\n') islf = 1;
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}
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if (iscr && islf) return 1; // DOS
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return 0; // Unix
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}
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void usage() {
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fprintf(stderr, "%s-%s\n%s\n", sofname, version, syoumei);
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fprintf(stderr, "usage: %s <ファイル.txt>\n", sofname);
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}
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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usage();
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return 1;
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}
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FILE *in = fopen(argv[1], "r");
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if (in == NULL) {
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perror("fopen input");
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usage();
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return 1;
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}
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FILE *tmp = fopen("tmp.txt", "w");
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if (tmp == NULL) {
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perror("fopen tmp");
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fclose(in);
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usage();
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return 1;
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}
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int line_ending_style = detect_line_ending(in);
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rewind(in);
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if (line_ending_style == 0) { // UNIX
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unix_to_dos(in, tmp);
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} else { // DOS
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dos_to_unix(in, tmp);
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}
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fclose(in);
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fclose(tmp);
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if (remove(argv[1]) != 0) {
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perror("元のファイルの削除");
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usage();
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return 1;
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}
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if (rename("tmp.txt", argv[1]) != 0) {
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perror("tmpファイル名の変更");
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usage();
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return 1;
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}
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return 0;
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}
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