null-character

What could cause an XML file to be filled with null characters?

由 牧云@^-^@ 提交于 2019-12-18 02:28:07
问题 This is a tricky question. I suspect it will require some advanced knowledge of file systems to answer. I have a WPF application, "App1," targeting .NET framework 4.0. It has a Settings.settings file that generates a standard App1.exe.config file where default settings are stored. When the user modifies settings, the modifications go in AppData\Roaming\MyCompany\App1\X.X.0.0\user.config . This is all standard .NET behavior. However, on occasion, we've discovered that the user.config file on a

Reading null delimited strings through a Bash loop

由 戏子无情 提交于 2019-12-17 10:23:29
问题 I want to iterate through a list of files without caring about what characters the filenames might contain, so I use a list delimited by null characters. The code will explain things better. # Set IFS to the null character to hopefully change the for..in # delimiter from the space character (sadly does not appear to work). IFS=$'\0' # Get null delimited list of files filelist="`find /some/path -type f -print0`" # Iterate through list of files for file in $filelist ; do # Arbitrary operations

Assign string containing null-character (\0) to a variable in Bash

由 为君一笑 提交于 2019-12-17 09:20:17
问题 While trying to process a list of file-/foldernames correctly (see my other questions) through the use of a NULL-character as a delimiter I stumbled over a strange behaviour of Bash that I don't understand: When assigning a string containing one or more NULL-character to a variable, the NULL-characters are lost / ignored / not stored. For example, echo -ne "n\0m\0k" | od -c # -> 0000000 n \0 m \0 k But: VAR1=`echo -ne "n\0m\0k"` echo -ne "$VAR1" | od -c # -> 0000000 n m k This means that I

inserting a substring into another string in c

由 不羁岁月 提交于 2019-12-13 08:04:37
问题 i just started learning c . i am doing an exercise and the question is as follows. Write a function called insertString to insert one character string into another string.The arguments to the function should consist of the source string, the string to be inserted, and the position in the source string where the string is to be inserted. So, the call insertString (text, "per", 10); with text as originally defined "the wrong son" results in the character string "per" being inserted inside text,

Copy string data with NULL character inside string to char array

由 好久不见. 提交于 2019-12-11 19:52:30
问题 I am trying to copy one string to char array, string have multiple NULL character. My problem is when first NULL character encountered my program stops copying the string. I have used two approaches. This is what I am so far. #include<iostream> #include<string.h> using namespace std; int main() { std::string str = "Hello World.\0 How are you?\0"; char resp[2000]; int i = 0; memset(resp, 0, sizeof(resp)); /* Approach 1*/ while(i < str.length()) { if(str.at(i) == '\0') str.replace(str.begin(),

difference between “\0” and '\0'

由 你说的曾经没有我的故事 提交于 2019-12-09 17:01:00
问题 I am trying to understand following piece of code, but I am confused between "\0" and '\0' .I know its silly but kindly help me out #define MAX_HISTORY 20 char *pStr = "\0"; for(x=0;x<MAX_HISTORY;x++){ str_temp = (char *)malloc((strlen(pStr)+1)*sizeof(char)); if (str_temp=='\0'){ return 1; } memset(str_temp, '\0', strlen(pStr) ); strcpy(str_temp, pStr); 回答1: Double quotes create string literals. So "\0" is a string literal holding the single character '\0' , plus a second one as the

store non-nul terminated C string constant in C++

由 懵懂的女人 提交于 2019-12-08 19:30:15
问题 Before anyone says, "DON'T DO THIS as it is really bad". I understand the reasons for having a NUL terminated string. I know one can state something like char mystr[] = { 'm', 'y', ' ', 's', 't', 'r', 'i', 'n', 'g'}; However, the convenience of the c-string representation is too great. The rational for this is that I'm programming for a micro-controller and I need to store data into the programme's memory. Some of the data is in the form of bytes, words, dwords and floats. I'd like the data

How to create C++ istringstream from a char array with null(0) characters?

由 别等时光非礼了梦想. 提交于 2019-12-06 05:11:54
问题 I have a char array which contains null characters at random locations. I tried to create an iStringStream using this array (encodedData_arr) as below, I use this iStringStream to insert binary data(imagedata of Iplimage) to a MySQL database blob field(using MySQL Connector/C++'s setBlob(istream *is) ) it only stores the characters upto the first null character. Is there a way to create an iStringStream using a char array with null characters? unsigned char *encodedData_arr = new unsigned

How to create C++ istringstream from a char array with null(0) characters?

由 做~自己de王妃 提交于 2019-12-04 11:27:20
I have a char array which contains null characters at random locations. I tried to create an iStringStream using this array (encodedData_arr) as below, I use this iStringStream to insert binary data(imagedata of Iplimage) to a MySQL database blob field(using MySQL Connector/C++'s setBlob(istream *is) ) it only stores the characters upto the first null character. Is there a way to create an iStringStream using a char array with null characters? unsigned char *encodedData_arr = new unsigned char[data_vector_uchar->size()]; // Assign the data of vector<unsigned char> to the encodedData_arr for

difference between “\\0” and '\\0'

由 拟墨画扇 提交于 2019-12-04 05:04:39
I am trying to understand following piece of code, but I am confused between "\0" and '\0' .I know its silly but kindly help me out #define MAX_HISTORY 20 char *pStr = "\0"; for(x=0;x<MAX_HISTORY;x++){ str_temp = (char *)malloc((strlen(pStr)+1)*sizeof(char)); if (str_temp=='\0'){ return 1; } memset(str_temp, '\0', strlen(pStr) ); strcpy(str_temp, pStr); Double quotes create string literals. So "\0" is a string literal holding the single character '\0' , plus a second one as the terminator. It's a silly way to write an empty string ( "" is the idiomatic way). Single quotes are for character
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