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Full Discussion: Segmentation fault when I pass a char pointer to a function in C.
Top Forums Programming Segmentation fault when I pass a char pointer to a function in C. Post 303016280 by Corona688 on Monday 23rd of April 2018 06:09:15 PM
Old 04-23-2018
Quote:
Originally Posted by dryden
Yes, interesting. So because that array stores actual memory on the stack, you cannot change what it points to, hmmmm. I thought arrays were pointers, until I tried to assign an array (pointer) to something else ;-). [I mean the reverse, assign something else to that array].
It's implicitly a pointer, implemented as one internally, but the same way you're not allowed to change a string's contents, you're not allowed to change its value. Hardcoded.
 

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LEARN ABOUT REDHAT

xmreptyperegister

XmRepTypeRegister(library call) 										   XmRepTypeRegister(library call)

NAME

       XmRepTypeRegister -- A representation type manager function that registers a representation type resource

SYNOPSIS

       #include <Xm/RepType.h>
       XmRepTypeId XmRepTypeRegister(
       String rep_type,
       String *value_names,
       unsigned char *values,
       unsigned char num_values);

DESCRIPTION

       XmRepTypeRegister  registers  a	representation type resource with the representation type manager. All features of the representation type
       management facility become available for the specified representation type. The function installs  a  forward  type  converter  to  convert
       string values to numerical representation type values.

       When  the  values  argument is NULL, consecutive numerical values are assumed. The order of the strings in the value_names array determines
       the numerical values for the resource. For example, the first value name is 0 (zero); the second value name is 1; and so on.

       If it is non-NULL, the values argument can be used to assign values to representation types that have nonconsecutive values or have  dupli-
       cate  names  for the same value. Representation types registered in this manner will consume additional storage and will be slightly slower
       than representation types with consecutive values.

       A representation type can only be registered once; if the same representation type name is registered more than once, the behavior is unde-
       fined.

       The function XmRepTypeAddReverse installs a reverse converter for a registered representation type. The reverse converter takes a represen-
       tation type numerical value and returns the corresponding string value. If the list of numerical values for a representation type  contains
       duplicate  values, the reverse converter uses the first name in the value_names list that matches the specified numeric value. For example,
       if a value_names array has cancel, proceed, and abort, and the corresponding values array contains 0, 1, and 0, the reverse converter  will
       return cancel instead of abort for an input value of 0.

       rep_type  Specifies the representation type name.

       value_names
		 Specifies  a  pointer	to an array of value names associated with the representation type. A value name is specified in lowercase
		 characters without an Xm prefix. Words within a name are separated with underscores.

       values	 Specifies a pointer to an array of values associated with the representation type. A value in this array is associated  with  the
		 value name in the corresponding position of the value_names array.

       num_values
		 Specifies the number of entries in the value_names and values arrays.

RETURN

       Returns the identification number for the specified representation type.

RELATED

       XmRepTypeAddReverse(3),	XmRepTypeGetId(3),  XmRepTypeGetNameList(3), XmRepTypeGetRecord(3), XmRepTypeGetRegistered(3), and XmRepTypeValid-
       Value(3).

														   XmRepTypeRegister(library call)
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