Yes, checking beyond the end of your string may show invalid values -- you never set it to anything else, so its contents could be anything. So what? sprintf will always end its strings in a NULL, preventing any of the garbage from being used.
Or, if your program does not place the null correctly, there may be something funny going on with buffer sizes. Make sure all your character arrays are large enough to hold their strings.
Hello Friends,
I have a problem with install.can u tell me how can I install a programm?I use AIX(IBM) system.
And how can i access cd-rom?I can't mounted,coz i am not Root.(can u tell me another Command /way)?
Thanks all. (1 Reply)
I have the programm, that says to STDERR(not to STDOUT!): "hello world!" and this programm is compiled and I have no sources.
When I try to open this programm in another using C:
=======================================
FILE *pp = popen("hello_to_stderr.exe", "r");
int c;
string a;
... (2 Replies)
Dear friends,
I have hexadecimal data like this.
now i want to read each letter and convert to decimal format.
for example.:
from the below data first i have to read hex data 0 and convert to 4 bit decimal value ie 0000.
similarly second letter 8 decimal value is 1000.
like this.... (6 Replies)
Hi All,
My main intension of is to convert the Hexstring stored in a char* into hex and then prefixing it with "0x" and suffix it with ','
This has to be done for all the hexstring char* is NULL.
Store the result prefixed with "0x" and suffixed with ',' in another char* and pass it to... (1 Reply)
Hello All,
I have a requirement where I need to replaced the hex character - '\x0D' with 2 hex characters - 'x0D' & 'x0A'
I am trying to use SED -
But somehow its not working. Any pointers?
Also the hex character '\x0D' can occur anywhere in the line.
Can this also be accomplished... (6 Replies)
Hi,
I have files that has got ebcdic character set and also, there are fields like binary and hex fields. is there a way to convert this to normal ascii data by taking care of comp & comp-3 fields?
Many Thanks!! (10 Replies)
Hi,
Is there really a difference between these two, std::hex and ios::hex??
I stumbled upon reading a line, "std::ios::hex is a bitmask (8 on gcc) and works with setf(). std::hex is the operator". Is this true?
Thanks (0 Replies)
I have a binary (hex) file I need to parse to get some data which are encoded this way:
.* b4 . . . 01 12 .* af .* 83 L1 x1 x2 xL 84 L2 y1 y2 yL
By another words there is a stream of hexadecimal bytes (in my example separated by space for better readability). I need to get value stored in... (3 Replies)
Hi Forum.
I'm running the following awk command to extract the suffix value (pos 38) from the "AM00" record and append to the end of the "AM01" record.
awk 'substr($0,13,4)=="AM00" {SUFFIX = substr($0,38,2)} substr($0,13,4)=="AM01" {$0 = $0 SUFFIX} 1' before.txt > after.txt
Before.txt:... (2 Replies)
Discussion started by: pchang
2 Replies
LEARN ABOUT REDHAT
vasprintf
ASPRINTF(3) Linux Programmer's Manual ASPRINTF(3)NAME
asprintf, vasprintf - print to allocated string
SYNOPSIS
#define _GNU_SOURCE
#include <stdio.h>
int asprintf(char **strp, const char *fmt, ...);
int vasprintf(char **strp, const char *fmt, va_list ap);
DESCRIPTION
The functions asprintf and vasprintf are analogues of sprintf and vsprintf, except that they allocate a string large enough to hold the
output including the terminating NUL, and return a pointer to it via the first parameter. This pointer should be passed to free(3) to
release the allocated storage when it is no longer needed.
RETURN VALUE
When successful, these functions return the number of bytes printed, just like sprintf(3). If memory allocation wasn't possible, or some
other error occurs, these functions will return -1, and the contents of strp is undefined.
NOTES
These functions are GNU extensions, not in C or POSIX. They are also available under *BSD. The FreeBSD implementation sets strp to NULL
on error.
SEE ALSO free(3), malloc(3), printf(3)GNU 2001-12-18 ASPRINTF(3)