andrew/exclib
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Forgot to remove exceptions.c from latest (broken) commit

Browse Source
This commit is contained in:
Andrew Kesterson
2011-07-16 23:07:04 -07:00
parent 8cc4ee6b6a
commit 216750dcd0
1 changed files with 0 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
exceptions.c
View File

@@ -1,79 +0,0 @@
#include <stdio.h>
#include <setjmp.h>
struct exc_status {
struct exc_status *next;
struct exc_status *prev;
jmp_buf buf;
int last_exception;
int last_caught;
int tried;
};
struct exc_status __exc_status_head;
struct exc_status *EXC_STATUS_LIST = &__exc_status_head;
int new_exc_frame(struct exc_status *es)
{
if ( !es )
return 1;
EXC_STATUS_LIST->next = es;
es->next = NULL;
es->prev = EXC_STATUS_LIST;
es->last_exception = 0;
es->last_caught = 0;
es->tried = 0;
EXC_STATUS_LIST = es;
return 0;
}
int clear_exc_frame()
{
struct exc_status *es = EXC_STATUS_LIST;
if ( es->prev )
es->prev->next = NULL;
EXC_STATUS_LIST = es->prev;
es->last_exception = 0;
es->last_caught = 0;
es->tried = 0;
}
jmp_buf exc_buf;
int EXC_LAST_EXCEPTION = 0;
int EXC_LAST_CAUGHT = 0;
int EXC_TRIED = 0;
#define TRY struct exc_status es; new_exc_frame(&es); es.last_exception = sigsetjmp(es.buf, 1); switch( es.last_exception ) { case 0:
#define CATCH(x) break; case x: es.last_caught = x;
#define DEFAULT break; default: es.last_caught = 1;
#define ETRY }; clear_exc_frame();
#define FINALLY }; if ( es.last_caught || es.tried ) {
#define THROW(x) EXC_STATUS_LIST->last_exception = x; siglongjmp(EXC_STATUS_LIST->buf, x);
void testfunc(void)
{
printf("Throwing 34 from testfunc\n");
THROW(34);
}
int main(void)
{
TRY {
printf("Throwing 2\n");
THROW(2);
} CATCH(1) {
printf("Caught 1\n");
} CATCH(2) {
printf("Caught 2\n");
TRY {
testfunc();
} CATCH(34) {
printf("Caught 34!\n");
} ETRY
} DEFAULT {
printf("In default clause\n");
} FINALLY {
printf("In finally clause\n");
} ETRY
return 0;
}