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[/] [eco32/] [tags/] [eco32-0.22/] [sim/] [except.c] - Rev 275
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/* * except.c -- exception handling */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <setjmp.h> #include "error.h" #include "except.h" #define MAX_ENV_NEST_DEPTH 10 static jmp_buf *environments[MAX_ENV_NEST_DEPTH]; static int currentEnvironment = -1; void throwException(int exception) { if (currentEnvironment < 0) { error("exception %d thrown while no environment active", exception); } longjmp(*environments[currentEnvironment], exception); } void pushEnvironment(jmp_buf *environment) { if (currentEnvironment == MAX_ENV_NEST_DEPTH - 1) { error("too many environments active"); } currentEnvironment++; environments[currentEnvironment] = environment; } void popEnvironment(void) { if (currentEnvironment < 0) { error("cannot pop environment - none active"); } currentEnvironment--; }
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