We all know the trouble overflows can cause, and this is why strn* exist - and most of the time they make sense. However, I have seen code which uses strncmp to compare commandline parameters like so: if(... strncmp(argv[i], "--help", 6) == 0 Now, I would have thought that this is unnecessary and perhaps even dangerous (for longer par...
Hello, compiling with gcc C99 I am trying to compare 2 string using string compare. However, I seem to be getting a stack dump on the strcmp line. **attribute will contain these, so I am looking for frametype. [name] [time] [type] [time] [name] [callref] [type] [string] [name] [port] [type] [int16] [name] [frametype] [type] [int16] ...
Hi There, If get a gring from the registry and it correctly displays when I place it in a message box. ::MessageBoxW(0, (LPCWSTR)achValue, _T("Found"), MB_YESNO); The value is stored in archValue which is a DWORD. What I want to do is compare it to the following string "2.0.7045.0" but strcmp fails to work for me. Any ideas on how to d...
Hi, I know this may be a totally newbie question (I haven't touched C in a long while), but can someone tell me why this isn't working? printf("Enter command: "); bzero(buffer,256); fgets(buffer,255,stdin); if (strcmp(buffer, "exit") == 0) return 0; If I enter "exit" it doesn't enter the if, does it have to do with the length of ...
I am writing a string compare function to sort medical terms that often contain special accented characters from many different European languages, and I need to somehow achieve a collation similar to MySQL's latin1_general_ci. First, I'm doing some basic munging on the strings to remove spaces, quotes, hyphens, parentheses, etc. The pr...
I'm having trouble comparing strings in C (with which I am fairly new to). I have socket on this server application waiting to accept data from a client. In this particular portion of my program I want to be able to execute a MySQL query based on the data received from the client. I want to be able to know when the received data has the ...
Can anyone verify this for me? JavaScript does not have a version of strcmp(), so you have to write out something like: ( str1 < str2 ) ? -1 : ( str1 > str2 ? 1 : 0 ); As this question is really just me complaining, I wouldn't normally waste your time with it, but I wasted 30 minutes looking for such a func...
I'm reading in an NES ROM file, where the first four bytes are "\x4e\x45\x53\x1a", or NES\x1a. In my actual code, the given file can be arbitrary, so I want to check to make sure this header is here. However, I'm running into some trouble, which the following code demonstrates: #include <stdio.h> #include <string.h> int main() { FILE ...
I am having a bit of trouble using strtok with strcmp. //Handles the header sent by the browser char* handleHeader(char *header){ //Method given by browser (will only take GET, POST, and HEAD) char *method,*path, *httpVer; method = (char*)malloc(strlen(header)+1); strcpy(method,header); method = ...
Hi I am using strcmp as shown below. I am debugging the values and which are coming same but still not getting that condition true. const char opcode_read[2] = {'0', '1'}; rc = recvfrom(s, blk_receive_full, sizeof (blk_receive_full), 0,(struct sockaddr FAR *)&sin, &fromlength); if(rc == -1){ printf("failed: recvfrom, \n No data rec...
I want another condition --still maintaining a fast execution time but safer-- where i return false if either or both strings is empty: int speicial_strcmp(char *str1, char* str2 ) { if(*str1==*str2 =='\0') return 0; return strcmp(str1,str2); } ...
I am writing a PHP page to convert an uploaded file to XML. I only want to convert the news file to XML. The only file that ever needs to be converted is news.htm. I have narrowed my problem down to this if statement. What is wrong with it? $fileName = basename( $_FILES['uploaded']['name'] ); if( strcmp( $fileName, "news.htm") == 0 ) (...
I made a function like this: bool IsSameString(char* p1, char* p2) { return 0 == strcmp(p1, p2); } The problem is that sometimes, by mistake, arguments are passed which are not strings (meaning that p1 or p2 is not terminated with a null character). Then, strcmp continues comparing until it reaches non-accessible memory and cras...
I'm using strcmp to compare character arrays in c++, but I get the following error for every occurrence of strcmp: error: invalid conversion from 'int' to 'const char*' followed by: error: initializing argument 2 of 'int strcmp(const char*, const char*)' I've include string, string.h, and stdio.h and here is my code, thanks to all who ...
I have a struct member that holds lots of string elements. What I want is to iterate the whole member of the struct and count only different elements (diff last names). struct log { char *last; }; ... struct log *l l->last = last_name; // loading *last member with data coming from last_name var ... What would be a good way to com...
There's something really weird going on: strcmp() returns -1 though both strings are exactly the same. Here is a snippet from the output of the debugger (gdb): (gdb) print s[i][0] == grammar->symbols_from_int[107][0] $36 = true (gdb) print s[i][1] == grammar->symbols_from_int[107][1] $37 = true (gdb) print s[i][2] == grammar->symbols_fr...
I want to allow the user to enter a coupon number in order to get a discount. After the coupon number is entered and submitted, the page reloads withe a tick showing that they have entered a correct amount. The way I'm trying to do this is displaying the tick if the coupon amount is not £0.00. But the string comparison doesn't seem to ...
In MSVC++, there's a function strcmpi for case-insensitive C-string comparisons. When you try and use it, it goes, This POSIX function is deprecated beginning in Visual C++ 2005. Use the ISO C++ conformant _stricmp instead. What I don't see is why does ISO not want MSVC++ to use strcmpi, and why is _stricmp the preferred way, and w...
Hey Folks, strcmp, when fed the results of strtok, in the following code seems to be blatantly lying to me. int fSize; char * buffer=NULL; char * jobToken = "job"; char * nextToken=NULL; job * curJob=NULL; struct node * head=NULL; struct node * parseList(FILE* file){ fseek(file,0,SEEK_END); fSize=ftell(file); buffer = (cha...
I'm trying to compare two strings. One stored in a file, the other retrieved from the user (stdin). Here is a sample program: int main() { char targetName[50]; fgets(targetName,50,stdin); char aName[] = "bob"; printf("%d",strcmp(aName,targetName)); return 0; } In this program, strcmp returns a value of -1 when ...