C Improved 6 pointers Miscellaneous API function encapsulation, sockets encapsulation, memory leak detection, log library

Pointers Misc Demo:

The same function is called two times to perform different functions:

1, basic operation, function allocated memory

#include  <stdio.h> #include  <stdlib.h> #include  <string.h>int  Getcontentlen (Char *filename,char **buf,int *len) {         char *tmp =  (char*) malloc (        if) (TMP  == null)  return -1;        strcpy (tmp, "Hello!");         *len = strlen (TMP);         *buf = tmp;        return 0;} Int main () {        int ret = 0;         char *filename =  "MyFile.txt";         char *buf = null;        int len  = 0;     &nBsp;  ret = getcontentlen (Filename,&buf,&len);         if (ret != 0) {Return ret;}         printf ("%s \n", buf);         printf ("%d \n", Len);                 if (buf != null)  free (BUF);         return 0;} Compile and run: [Email protected]:~/high$ gcc -g -o run main.c && ./run  hello! 6 [email protected]:~/high$

#include  <stdio.h> #include  <stdlib.h> #include  <string.h>int  Getcontentlen (Char *filename,char *buf,int *len) {         if (buf == null)          {                 *len = 10;                 return 0;         }        else         {                 strncpy (buf, "goog morning!", ten);        }         return 0;} Int main () {        int ret = 0;        char *filename =  "MyFile.txt";         int len = 0;         ret = getcontentlen (Filename,null,&len);         char *buf =  (char *) malloc (+);         ret =  getcontentlen (Filename,buf,&len);         printf ("%s \n" , buf);         return 0;} Compiling: [Email protected]:~/high$ gcc -g -o run main.c && ./run  goog morni [email protected]:~/high$

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C Improved 6 pointers Miscellaneous API function encapsulation, sockets encapsulation, memory leak detection, log library