// This is the master header. This will include every feature of the library. // This comes with many helper macros (high level API) and utility functions. #include "macro_collections.h" // A PARAM is a standard way to pass required parameters to the lower level API. // It is a tuple of form (PFX, SNAME, SIZE, K, V). In this case, not all of them // are used, so we can leave them empty. We are creating a list of value int. #define MY_LIST_PARAMS (intl, int_list, , , int) // High level API. Generate a LIST from the CMC library with the STR extension // using our previously defined PARAMs. Every collections has a CORE part that // needs to be generated first. Then, we can add other parts after. This macro // does all of that for us. The STR part will provide us with a function that // will be used later. C_MACRO_COLLECTIONS_EXTENDED(CMC, LIST, MY_LIST_PARAMS, (STR)) int main(void) { // Our list type is defined by SNAME and all functions are prefixed by PFX // (PFX can also be thought as the function's namespace). Also, nodes, // entries, iterators and other structures are prefixed by SNAME. So PFX is // for functions and SNAME is for structs, where the main one is simply // 'struct SNAME'. // To initialize a list we need to pass in an initial capacity and something // that is called a function table for the V type. // This function table is a struct with methods that will extract some // (sometimes) necessary behaviour from your custom data type. Things like // hash, comparison and printing. A list doesn't require any of these // functions. That is, the CORE module doesn't use any of them. // But since we are using the STR module, we will need to define the 'str' // function. luckily, for the 'int' type, the library already provides such // function (cmc_i32_str), provided by the /utl/futils.h header file. struct int_list *list = intl_new(32, &(struct int_list_fval){ .str = cmc_i32_str, NULL }); // Check if the list was successfully initialized. It could fail if the // initial capacity is too big or if 'struct int_list_fval *' is NULL, // because every data structure must have a valid function table. if (!list) return 1; // Add some items to the list. The CMC data structures are all dynamically // sized. So there can be as many items as you want as long as you have // enough memory. for (int i = 0; i < 100; i++) { // Try to add an element to the list. If it fails you can check what // caused it by getting its flag. if (!intl_push_back(list, i)) { enum cmc_flags flag = intl_flag(list); // Use cmc_flags_to_str to map the enum error to a string. fprintf(stderr, "%s : push_back failed\n", cmc_flags_to_str[flag]); } } // Now we will use the STR module, the _print() function. This is where the // '.str' from the function table comes into play. If we haven't defined it, // the program would've crashed. We also need to define to which file we // will be printing the list's content. In this case, the terminal. Also, // some strings need to be defined. They will be printed: before all elements, // between each one, and after all elements. This is very usefull and can // print a data structure very nicely. intl_print(list, stdout, "[ ", ", ", " ]\n"); // Free all of its resources intl_free(list); }