Hi:
Your suggestion really works, but I get "segment fault" while reading the file at second time.
Below is the output message:
uValue in decimal is 16 and in hex is 0x10
Segmentation fault
After I mark the sscanf as below, the segmentation fault disappears.
while(!feof(fIn))
{
fgets(cTemString, 3, fIn);
// sscanf(cTemString,"%x",&uValue);
printf("uValue in decimal is %d and in hex is 0x%x\n",uValue,uValue);
// uValue = atoi(cTemString);
fwrite(&uValue, sizeof(unsigned char),1,fout);
}
It is quite wired, since sscanf only parse the value to uValue and doesn't change the file token at all.
Appreciate your help,
cckuo
-----Original Message-----
From: Manish Katiyar [mailto:mkatiyar@xxxxxxxxx]
Sent: Wednesday, December 19, 2007 6:43 PM
To: C C Kuo(郭哲君)
Subject: Re: how to know a binary or text file and show all the information in file
Hi,
Did you try something like this ?
while(!feof(fIn))
{
fgets(cTemString, 3, fIn);
sscanf(cTemString,"%x",&uValue);
printf("uValue in decimal is %d and in hex is 0x%x\n",uValue,uValue);
// uValue = atoi(cTemString);
fwrite(&uValue, sizeof(unsigned char),1,fout);
}
Hope that helps
On Dec 19, 2007 3:30 PM, <C_C_Kuo@xxxxxxxxxxxxxx> wrote:
> Hi all:
> My problem is:
> I have a file which content is like below 100f1010 0f100f10 0e100e10 (The format is ASCII text, with CRLF line terminators, which I got by typing "file myfile" and thanks Manish and Grigoriy ).
> Right now I want to transfer it to hex format each 2 chars and save it as binary file like below:
> 0f 10 0f 10 original input
> Ox0f 0x10 0x0f 0x10 final output
> 0e 10 0e 10 original input
> 0x0e 0x10 0x0e 0x10 final output
>
> And my function is like below
> while(!feof(fIn))
> {
> fgets(cTemString, 3, fIn);
> uValue = atoi(cTemString);
> fwrite(&uValue, sizeof(unsigned char),1,fout);
> }
>
> But I have some problems right now,
> 1. Does there have any atoh function, transfer char* to hex value.
> 2. How can I avoid getting the control character, like /r /c,etc by using fgets?
> I know I can use fgetc and isspace to check whether the character is control character. But it is too slow, since read 1 char each time. Can any acceleration help me?
>
> Appreciate all your help,
> cckuo
> -----Original Message-----
> From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Grigoriy Shcherbyak
> Sent: Wednesday, December 19, 2007 4:42 PM
> To: kernelnewbies@xxxxxxxxxxxx
> Subject: Re: how to know a binary or text file and show all the information in file
>
>
> Hello!
>
> "File" utility should give you the information on what this file is.
> Just run
> file myfile.dat.
>
> If you mean that you need to transform binary in printable form, then
> look to base64 coding functionality from openssl package - it can do
> this.
>
> Many tools can open binary files, it depends on what you want it to do.
>
> Regards,
>
> On Dec 19, 2007 10:18 AM, <C_C_Kuo@xxxxxxxxxxxxxx> wrote:
> > Dear all:
> > Could someone tell me how to know the file is binary or ASCII?
> > I know both of them are stream of bytes but interpreted by different ways.
> > My questions are:
> > 1. How can I know this without opening it?
> > 2. how can I see all the information in a file, include all the control characters, like linein, print character and line feed, etc.
> > 3. Is there any tool on Linux can open binary file?
> > 4. Is there any tool on Linux can transfer ASCII to binary and binary to ASCII?
> >
> > Appreciate your help,
> > cckuo
> >
> >
> >
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>
>
>
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Thanks & Regards,
********************************************
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3rd Floor, Fair Winds Block
EGL Software Park
Off Intermediate Ring Road
Bangalore 560071, India
***********************************************
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