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-rw-r--r--libbb/convert.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/libbb/convert.c b/libbb/convert.c
new file mode 100644
index 000000000..1fb3f32c0
--- /dev/null
+++ b/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;
+}