Below is the code for cutting the file and the merge file. It is some things I have written when I am used to familiarize my ability to operate with the file operation function. I have a good room, share with you, and listen to you. The program is debugged under UNIX_AIX.
/ ***************************
Mycut.c
File cutting program
Used to cut files into small files for 1024 bytes
*********************************** /
#include
#include
#include
#define size 1024
#define max 1048576 * 5
Main (int Argc, char ** argv)
{
Char buffer [size], c;
File * Source, * target;
Struct stat sbuf;
INT count = 0, n = 0;
Char flag = '0';
Char mycount [10];
CHAR Parts [10];
CHAR MYSIGN [20];
IF (argc! = 2)
{
FPrintf (stderr, "usage: source - file / n", * argv);
Exit (1);
}
IF ((Source = FOPEN (Argv [1], "R") == NULL)
{
PERROR (Argv [1]);
Exit (1);
}
Stat (Argv [1], & SBUF);
IF (SBUF.ST_SIZE> MAX)
{
Printf ("THE FILE IS TOO BIG / N");
exit (0);
}
/ * The number of blocks of the file * /
Count = SBUF.ST_SIZE / SIZE 1;
MEMSET (Mysign, 0, 10);
Printf ("% d / n", count);
/ * Record the number of files * /
Target = fopen ("thecount", "w");
Sprintf (mysign, "% d", count);
FPUTS (Mysign, Target);
Fclose (Target);
/ * Record file name * /
Target = fopen ("thefilename", "w");
FPUTS (Argv [1], Target;
Fclose (Target);
FOR (Flag = 0; flag { Sprintf (Mysign, "% D", FLAG); Printf ("% s", mysign); Target = fopen (mysign, "w"); n = fread (Buffer, Sizeof (Char), Size, Source FWrite (Buffer, Sizeof (Char), N, Target); Fclose (Target); } Fclose (Source); exit (0); } / *************************** mycomb.c File merger Merged recovery for small files that will cut with the above program *********************************** / #include #include #include #define size 1024 #define max 1048576 * 5 Main (int Argc, char ** argv) { Char buffer [size], c; File * Source, * target; Struct stat sbuf; INT count = 0, n = 0; Char flag = '0'; Char mycount [10]; Char filename [20]; CHAR MYSIGN [10]; / * Number of file blocks * / IF ((Source = FOPEN ("Thecount", "R")) == NULL) { Printf ("Some Thing IS WRONG / N"); Exit (1); } MEMSET (MyCount, 0, 10); FGETS (Mycount, 10, Source); Fclose (Source); REMOVE ("Thecount"); Count = ATOI (MyCount); / * Get file name information * / IF ((Source = Fopen ("TheFileName", "R")) == NULL) { Printf ("Some Thing IS WRONG / N"); Exit (1); } MEMSET (FileName, 0, 20); FGETS (Filename, 10, SOURCE); Fclose (Source); Remove ("thefilename"); Target = fopen (filename, "a"); MEMSET (Mysign, 0, 10); / * File merge * / FOR (Flag = 0; flag { Sprintf (Mysign, "% D", FLAG); Printf ("% s", mysign); Source = fopen (mysign, "r"); n = fread (Buffer, Sizeof (Char), Size, Source FWrite (Buffer, Sizeof (Char), N, Target); Fclose (Source); REMOVE (MYSIGN); } Fclose (Target); exit (0); }
