first commit

05_day/setjmp/setjmp.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <unistd.h>
+
+#define FILE_ERROR  1
+#define MEM_ERROR   2
+
+jmp_buf jmpbuf;
+
+
+FILE * find_file(const char *fname)
+{
+	FILE *f;
+
+	if (access(fname, F_OK))
+		longjmp(jmpbuf, FILE_ERROR);
+
+	f = fopen(fname, "r");
+	if (f == NULL)
+		longjmp(jmpbuf, FILE_ERROR);
+
+	return f;
+}
+
+void read_file(FILE *f, int size)
+{
+	char *buf;
+
+	if (size < 0)
+		longjmp(jmpbuf, MEM_ERROR);
+
+	buf = malloc(size);
+	if (buf == NULL)
+		longjmp(jmpbuf, MEM_ERROR);
+
+	fread(buf, size, 1, f);
+
+	/* do something */
+
+	free(buf);
+}
+int main(int argc, char *argv[])
+{
+	int res;
+	int step;
+	FILE *fp;
+
+	/* Usage: ./a.out <filename> <bufsize> */
+
+	step = -1;
+	if ((res = setjmp(jmpbuf)) == 0) {
+		step = 0;
+		fp = find_file(argv[1]);
+		step = 1;
+		read_file(fp, strtol(argv[2], NULL, 10));
+		step = 2;
+		fclose(fp);
+	}
+	else if (res == FILE_ERROR) {
+		printf("file exception: %s\n", argv[1]);
+	}
+	else if (res == MEM_ERROR) {
+		printf("memory exception: %s\n", argv[2]);
+		fclose(fp);
+	}
+
+	printf("last step = %d\n", step);
+	return res;
+}

05_day/setjmp/try_catch_1.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; if( !setjmp(ex_buf__) ){
+#define CATCH } else {
+#define ETRY } }while(0)
+#define THROW longjmp(ex_buf__, 1)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW;
+		printf("I do not appear\n");
+	}
+	CATCH
+	{
+		printf("Got Exception!\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_2.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0:
+#define CATCH(x) break; case x:
+#define ETRY } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAR_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_3.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0: while(1){
+#define CATCH(x) break; case x:
+#define FINALLY break; } default:
+#define ETRY } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAR_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	FINALLY
+	{
+		printf("...et in arcadia Ego\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_4.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0: while(1){
+#define CATCH(x) break; case x:
+#define FINALLY break; } default:
+#define ETRY } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAR_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_5.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0: while(1){
+#define CATCH(x) break; case x:
+#define FINALLY break; } default: {
+#define ETRY } } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAR_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_6.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0: while(1){
+#define CATCH(x) break; case x:
+#define FINALLY break; } default: {
+#define ETRY } } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAZ_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	ETRY;
+
+	return 0;
+}

05_day/setjmp/try_catch_7.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <setjmp.h>
+
+#define TRY do{ jmp_buf ex_buf__; switch( setjmp(ex_buf__) ){ case 0: while(1){
+#define CATCH(x) break; case x:
+#define FINALLY break; } default: {
+#define ETRY break; } } }while(0)
+#define THROW(x) longjmp(ex_buf__, x)
+
+#define FOO_EXCEPTION (1)
+#define BAR_EXCEPTION (2)
+#define BAZ_EXCEPTION (3)
+
+int main(int argc, char** argv)
+{
+	TRY
+	{
+		printf("In Try Statement\n");
+		THROW( BAZ_EXCEPTION );
+		printf("I do not appear\n");
+	}
+	CATCH( FOO_EXCEPTION )
+	{
+		printf("Got Foo!\n");
+	}
+	CATCH( BAR_EXCEPTION )
+	{
+		printf("Got Bar!\n");
+	}
+	CATCH( BAZ_EXCEPTION )
+	{
+		printf("Got Baz!\n");
+	}
+	ETRY;
+
+	return 0;
+}