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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. // A function to display an error message and then exit
  6. void fatal(char *message) {
  7.    char error_message[100];
  8.  
  9.    strcpy(error_message, "[!!] Fatal Error ");
  10.    strncat(error_message, message, 83);
  11.    perror(error_message);
  12.    exit(-1);
  13. }
  14.  
  15. // An error checked malloc() wrapper function
  16. void *ec_malloc(unsigned int size) {
  17.    void *ptr;
  18.    ptr = malloc(size);
  19.    if(ptr == NULL)
  20.       fatal("in ec_malloc() on memory allocation");
  21.    return ptr;
  22. }
  23.  
  24. // dumps raw memory in hex byte and printable split format
  25. void dump(const unsigned char *data_buffer, const unsigned int length) {
  26. 	unsigned char byte;
  27. 	unsigned int i, j;
  28. 	for(i=0; i < length; i++) {
  29. 		byte = data_buffer[i];
  30. 		printf("%02x ", data_buffer[i]);  // display byte in hex
  31. 		if(((i%16)==15) || (i==length-1)) {
  32. 			for(j=0; j < 15-(i%16); j++)
  33. 				printf("   ");
  34. 			printf("| ");
  35. 			for(j=(i-(i%16)); j <= i; j++) {  // display printable bytes from line
  36. 				byte = data_buffer[j];
  37. 				if((byte > 31) && (byte < 127)) // outside printable char range
  38. 					printf("%c", byte);
  39. 				else
  40. 					printf(".");
  41. 			}
  42. 			printf("\n"); // end of the dump line (each line 16 bytes)
  43. 		} // end if
  44. 	} // end for
  45. }
  46.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function 'void* ec_malloc(unsigned int)':
prog.cpp:20:50: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
       fatal("in ec_malloc() on memory allocation");
                                                  ^
/usr/lib/gcc/i586-linux-gnu/5/../../../i386-linux-gnu/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/51vvVO
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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