Moved from dos2unix

libbb/convert.c

@@ -0,0 +1,106 @@
+/*
+ * Taken from dos2unix for BusyBox
+ *
+ * dos2unix '\n' convertor 0.5.0
+ *   based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
+ * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
+ * All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "libbb.h"
+
+// if fn is NULL then input is stdin and output is stdout
+extern int convert(char *fn, int ConvType) {
+	char c;
+	char *tempFn = NULL;
+	FILE *in = stdin, *out = stdout;
+
+	if (fn != NULL) {
+		if ((in = fopen(fn, "r")) == NULL) {
+			perror_msg(fn);
+			return -1;
+		}
+		tempFn = tmpnam(NULL);
+		if (tempFn == NULL || (out = fopen(tempFn, "w")) == NULL) {
+			perror_msg(NULL);
+			return -2;
+		}
+	}
+
+	while ((c = fgetc(in)) != EOF) {
+		if (c == '\r') {
+			if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
+				// file is alredy in DOS format so it is not necessery to touch it
+				if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
+					perror_msg(NULL);
+					return -2;
+				}
+				return 0;
+			}
+			if (!ConvType)
+				ConvType = CT_DOS2UNIX;
+			break;
+		}
+		if (c == '\n') {
+			if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
+				// file is alredy in UNIX format so it is not necessery to touch it
+				if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
+					perror_msg(NULL);
+					return -2;
+				}
+				return 0;
+			}
+			if (!ConvType)
+				ConvType = CT_UNIX2DOS;
+			if (ConvType == CT_UNIX2DOS)
+				fputc('\r', out);
+			fputc('\n', out);
+			break;
+		}
+		fputc(c, out);
+	}
+	if (c != EOF)
+		while ((c = fgetc(in)) != EOF) {
+			if (c == '\r')
+				continue;
+			if (c == '\n') {
+				if (ConvType == CT_UNIX2DOS)
+					fputc('\r', out);
+				fputc('\n', out);
+				continue;
+			}
+		fputc(c, out);
+	}
+
+	if (fn != NULL) {
+	    if (fclose(in) < 0 || fclose(out) < 0 || 
+		    (in = fopen(tempFn, "r")) == NULL || (out = fopen(fn, "w")) == NULL) {
+		perror_msg(NULL);
+		return -2;
+	    }
+
+	    while ((c = fgetc(in)) != EOF)
+		fputc(c, out);
+
+	    if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
+		perror_msg(NULL);
+		return -2;
+	    }
+	}
+
+	return 0;
+}