Standard Types

The C51 standard library contains definitions for a number of standard types which may be used by the library routines. These standard types are declared in include files which you may access from your C programs.

jmp_buf

The jmp_buf type is defined in SETJMP.H and specifies the buffer used by the setjmp and longjmp routines to save and restore the program environment. The jmp_buf type is defined as follows:

#define _JBLEN 7

typedef char jmp_buf[_JBLEN];

va_list

The va_list array type is defined in STDARG.H. This type holds data required by the va_arg and va_end routines. The va_list type is defined as follows:

typedef char *va_list;

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