get_all_args(function_name,args,spec,&p1,...)

1. function_name: string, used for error messages if anything goes wrong.

1. args: integer, received from the interpreter.
2. spec: printf-like specification of expected arguments.
3. p1, p2...: pointers to argument holders

   Valid types specifiers (from comment in module_support.c):

   * %i: INT_TYPE

• %I: int or float -> INT_TYPE
• %d: int (the c type "int" which may vary from INT_TYPE)
• %D: int of float -> int
• %+: positive int -> INT_TYPE
• %l: int or bignum -> LONGEST
• %s: char * Only narrow (8 bit) strings.
• %n: struct pike_string * Only narrow (8 bit) strings.
• %N: struct pike_string * or NULL Only narrow (8 bit) strings.
• %t: struct pike_string * Any string width.
• %T: struct pike_string * or NULL Any string width.
• %a: struct array *
• %A: struct array * or NULL
• %f: float -> FLOAT_TYPE
• %F: float or int -> FLOAT_TYPE
• %m: struct mapping *
• %G: struct mapping * or NULL
• %u: struct multiset *
• %U: struct multiset * or NULL
• %o: struct object *
• %O: struct object * or NULL
• %p: struct program *
• %P: struct program * or NULL
• %*: struct svalue *

  For compatibility:

  * %S: struct pike_string * Only 8bit strings

• %W: struct pike_string * Allow wide strings
• %M: struct multiset *

  A period can be specified between type specifiers to mark the start of optional arguments.

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