Error Checking C Code
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C Programming Error Handling
Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who C - Error Handling Advertisements Previous Page Next Page As such, C programming does not provide direct support for error handling but being a system programming language, it provides you access at lower level in the form of return values. Most of the C or even Unix function calls return -1 or NULL in case of any error and set an error code errno. It is set how to perform check disk as a global variable and indicates an error occurred during any function call. You can find various error codes defined in
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C Error Handling Best Practices
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack error handling in c++ Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error handling in C code up vote 102 down vote favorite https://www.tutorialspoint.com/cprogramming/c_error_handling.htm 59 What do you consider "best practice" when it comes to error handling errors in a consistent way in a C library. There are two ways I've been thinking of: Always return error code. A typical function would look like this: MYAPI_ERROR getObjectSize(MYAPIHandle h, int* returnedSize); The always provide an error pointer approach: int getObjectSize(MYAPIHandle h, MYAPI_ERROR* returnedError); When using the first approach it's possible to write code http://stackoverflow.com/questions/385975/error-handling-in-c-code like this where the error handling check is directly placed on the function call: int size; if(getObjectSize(h, &size) != MYAPI_SUCCESS) { // Error handling } Which looks better than the error handling code here. MYAPIError error; int size; size = getObjectSize(h, &error); if(error != MYAPI_SUCCESS) { // Error handling } However, I think using the return value for returning data makes the code more readable, It's obvious that something was written to the size variable in the second example. Do you have any ideas on why I should prefer any of those approaches or perhaps mix them or use something else? I'm not a fan of global error states since it tends to make multi threaded use of the library way more painful. EDIT: C++ specific ideas on this would also be interesting to hear about as long as they are not involving exceptions since it's not an option for me at the moment... c error-handling share|improve this question edited Nov 6 '13 at 19:09 ubershmekel 3,64013145 asked Dec 22 '08 at 10:46 Laserallan 6,71172956 add a comment| 17 Answers 17 active oldest votes up vote 50 down vote accepted I like the error as return-value way. If you're designing the api and you
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn http://programmers.stackexchange.com/questions/302730/should-one-check-for-every-little-error-in-c more about hiring developers or posting ads with us Programmers Questions Tags Users Badges Unanswered Ask Question _ Programmers Stack Exchange is a question and answer site for professional programmers interested in conceptual questions about software development. https://ideone.com/ Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Should one check for every little error checking error in C? [duplicate] up vote 53 down vote favorite 4 This question already has an answer here: What defines robust code? 12 answers As a good programmer one should write robust codes that will handle every single outcome of his program. However, almost all functions from the C library will return 0 or -1 or NULL when there's an error. It's sometimes obvious that error checking is needed, for example when you try to error checking c open a file. But I often ignore error checking in functions such as printf or even malloc because I don't feel necessary. if(fprintf(stderr, "%s", errMsg) < 0){ perror("An error occurred while displaying the previous error."); exit(1); } Is it a good practice to just ignore certain errors, or is there a better way to handle all the errors? c error-handling share|improve this question asked Nov 16 '15 at 23:59 Derek 朕會功夫 33338 marked as duplicate by gnat, GlenH7, Dan Pichelman Nov 17 '15 at 18:32 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 30 +1 because that code made me laugh out loud. –Ixrec Nov 17 '15 at 0:06 12 Depends on the robustness level that is required for the project you're working on. Systems that has a chance of receiving inputs from untrusted parties (e.g. public-facing servers), or operating in not fully trusted environments, need to be coded very cautiously, to avoid the code becoming a ticking time bomb (or the weakest link being hacked). Obviously, hobby and learning projects do not need such robustness. –rwong Nov 17 '15 at 0:32 1 Some languages provide exceptions. If you don't catch exceptions, your thread will terminate, which is better than letting it co
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