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Bernhard Fischer trimmed down dos2unix a bit.

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This commit is contained in:
Rob Landley 2005-09-01 03:11:19 +00:00
parent 078bacf1e9
commit f815469a76
1 changed files with 33 additions and 45 deletions
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78
coreutils/dos2unix.c
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@ -35,28 +35,24 @@
#include <sys/time.h>
#include "busybox.h"
#define CT_AUTO 0
#define CT_UNIX2DOS 1
#define CT_DOS2UNIX 2
/* We are making a lame pseudo-random string generator here. in
* convert(), each pass through the while loop will add more and more
* stuff into value, which is _supposed_ to wrap. We don't care about
* it being accurate. We care about it being messy, since we then mod
* it by the sizeof(letters) and then use that as an index into letters
* it being accurate. We care about it being messy, since we use it
* to pick a random letter to add to out temporary file. */
typedef unsigned long int bb_uint64_t;
static const char letters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
// if fn is NULL then input is stdin and output is stdout
/* if fn is NULL then input is stdin and output is stdout */
static int convert(char *fn, int ConvType)
{
int c, fd;
struct timeval tv;
char tempFn[BUFSIZ];
RESERVE_CONFIG_BUFFER(tempFn, BUFSIZ);
static bb_uint64_t value=0;
FILE *in = stdin, *out = stdout;
FILE *in, *out;
if (fn != NULL) {
in = bb_xfopen(fn, "rw");
@ -73,7 +69,9 @@ static int convert(char *fn, int ConvType)
* the input file... */
gettimeofday (&tv, NULL);
value += ((bb_uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
tempFn[++c] = letters[value % 62];
tempFn[++c] = ((value%62) < 26)?(value%62)+97:
((value%62) < 52)?(value%62)+39:
(value%62)-4;
tempFn[c+1] = '\0';
value /= 62;
@ -88,12 +86,16 @@ static int convert(char *fn, int ConvType)
}
break;
}
} else {
in = stdin;
out = stdout;
}
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
/* file is already in DOS format so it is
* not necessary to touch it. */
remove(tempFn);
if (fclose(in) < 0 || fclose(out) < 0) {
bb_perror_nomsg();
@ -101,13 +103,12 @@ static int convert(char *fn, int ConvType)
}
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
/* file is already in DOS format so it is
* not necessary to touch it. */
remove(tempFn);
if ((fclose(in) < 0) || (fclose(out) < 0)) {
bb_perror_nomsg();
@ -115,27 +116,21 @@ static int convert(char *fn, int ConvType)
}
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;
}
while (c != EOF && (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);
}
@ -160,30 +155,23 @@ static int convert(char *fn, int ConvType)
int dos2unix_main(int argc, char *argv[])
{
int ConvType = CT_AUTO;
int ConvType;
int o;
//See if we are supposed to be doing dos2unix or unix2dos
/* See if we are supposed to be doing dos2unix or unix2dos */
if (argv[0][0]=='d') {
ConvType = CT_DOS2UNIX;
}
if (argv[0][0]=='u') {
} else {
ConvType = CT_UNIX2DOS;
}
// process parameters
while ((o = getopt(argc, argv, "du")) != EOF) {
switch (o) {
case 'd':
ConvType = CT_UNIX2DOS;
break;
case 'u':
ConvType = CT_DOS2UNIX;
break;
default:
bb_show_usage();
}
}
/* process parameters */
o = bb_getopt_ulflags(argc, argv, "ud");
/* Do the conversion requested by an argument else do the default
* conversion depending on our name. */
if (o)
ConvType = o;
if (optind < argc) {
while(optind < argc)