correction partielle

tp/tp2/correction/ex1/copy_stdio.c

@@ -0,0 +1,36 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <assert.h>
+#include <stdio.h>
+
+#define BLOCK_SIZE 1
+
+
+int main(int argc, char *argv[])
+{
+	FILE* fin,
+		* fout;
+	char buf[BLOCK_SIZE];
+
+	assert( argc == 3 );
+
+	fin = fopen(argv[1], "r");
+	assert( fin != NULL );
+
+	fout = fopen(argv[2],"w");
+	assert( fout != NULL );
+
+	while(1){
+		ssize_t nb_read; 
+		nb_read = fread(buf,BLOCK_SIZE,1,fin);
+		if (nb_read <= 0)
+			break;
+		fwrite(buf,BLOCK_SIZE,nb_read,fout);
+	}
+
+	fclose(fin);
+	fclose(fout);
+
+	return 0;
+}
+

tp/tp2/correction/ex1/copy_sys.c

@@ -0,0 +1,35 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <assert.h>
+
+#define BLOCK_SIZE 1
+
+
+int main(int argc, char *argv[])
+{
+	int fin,
+		fout;
+	char buf[BLOCK_SIZE];
+
+	assert( argc == 3 );
+
+	fin = open(argv[1],O_RDONLY);
+	assert( fin >= 0 );
+
+	fout = open(argv[2],O_CREAT|O_WRONLY|O_TRUNC,0600);
+	assert( fout >= 0 );
+
+	while(1){
+		ssize_t nb_read; 
+		nb_read = read(fin,buf,BLOCK_SIZE);
+		if (nb_read <= 0)
+			break;
+		write(fout,buf,nb_read);
+	}
+
+	close(fin);
+	close(fout);
+
+	return 0;
+}
+

tp/tp2/correction/ex2/my_cp_map.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <time.h>
+#include <sys/mman.h>
+
+
+#define BUFSIZE 1024 
+
+
+static inline double tstamp(void) 
+{                             
+	struct timespec tv;
+	clock_gettime(CLOCK_REALTIME, &tv);
+	return tv.tv_sec + tv.tv_nsec * 1.0e-9;
+}
+
+int main(int argc, char *argv[])
+{
+	//char buf[BUFSIZE];	
+	char * bufin = NULL,
+		 * bufout = NULL;
+
+
+	int fin,
+		fout;
+
+	double start,
+		   end;
+
+	size_t filesize = 0;
+
+	assert(argc == 3);
+
+	start = tstamp();
+
+	fin = open(argv[1],O_RDONLY);
+	assert(fin >=0);
+
+	fout = open(argv[2],O_RDWR|O_CREAT|O_TRUNC,0600);
+	assert(fout >=0);
+
+	filesize = lseek(fin,0,SEEK_END);
+	ftruncate (fout,filesize);
+
+	bufin = mmap(NULL,filesize,PROT_READ,MAP_PRIVATE,fin,0);
+	assert(bufin != (void*)-1);
+
+	bufout = mmap(NULL,filesize,PROT_WRITE,MAP_SHARED,fout,0);
+
+	assert(bufout != (void*)-1);
+
+
+	memcpy(bufout,bufin,filesize);
+
+	//munmap(bufin,filesize);
+	//munmap(bufout,filesize);
+
+	//ssize_t nb_read = read(fin,buf,sizeof(buf));
+	close(fin);
+	close(fout);
+
+	end = tstamp();
+
+	printf("time = %.3lf\n",end - start);
+	return 0;
+}