Moved from dos2unix

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;
+}