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| -rw-r--r-- | libbb/convert.c | 106 |
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; +} |