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Full Discussion: Returning local string value from a function in C
Top Forums Programming Returning local string value from a function in C Post 302523825 by royalibrahim on Friday 20th of May 2011 01:58:17 AM
Old 05-20-2011
Returning local string value from a function in C
Hi,

If I have a code like this, what are the potential problems do you see?
Code:
const char* const retString() {
    return "hello"; /* string literal */
}

My questions are:

a) Since the string literal which is already a constant read only data (cannot be modifiable), should I need to explicitly mention const in the return type of this function?
b) Also, what this "char* const", const pointer serves here? what happens if it is just normal pointer "char*"?
c) I guess, this version of returning the string literal is re-entrant. May I know how?
d) Can I use reference here in the return type?

Thanks,
Ibrahim
 

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LEARN ABOUT DEBIAN

cc_string

cc_string(3)							       Coin							      cc_string(3)

NAME

       cc_string -

       The cc_string type is a C ADT for ASCII string management.

       This is a Coin extension.

SYNOPSIS

       #include <Inventor/C/base/string.h>

   Public Attributes
       char * pointer
       size_t bufsize
       char buffer [CC_STRING_MIN_SIZE]

   Related Functions
       (Note that these are not member functions.)
       void cc_string_remove_substring (cc_string *me, int start, int end)
       void cc_string_construct (cc_string *me)
       cc_string * cc_string_construct_new (void)
       cc_string * cc_string_clone (const cc_string *string)
       void cc_string_clean (cc_string *string_struct)
       void cc_string_destruct (cc_string *me)
       void cc_string_set_text (cc_string *me, const char *text)
       void cc_string_set_subtext (cc_string *me, const char *text, int start, int end)
       void cc_string_set_integer (cc_string *me, int integer)
       void cc_string_set_string (cc_string *me, const cc_string *string)
       void cc_string_append_string (cc_string *me, const cc_string *string)
       void cc_string_append_text (cc_string *me, const char *text)
       void cc_string_append_integer (cc_string *me, const int digits)
       void cc_string_append_char (cc_string *me, const char c)
       unsigned int cc_string_length (const cc_string *me)
       void cc_string_clear (cc_string *me)
       void cc_string_clear_no_free (cc_string *me)
       uint32_t cc_string_hash_text (const char *text)
       uint32_t cc_string_hash (const cc_string *me)
       const char * cc_string_get_text (const cc_string *me)
       int cc_string_is (const cc_string *me)
       int cc_string_compare (const cc_string *lhs, const cc_string *rhs)
       int cc_string_compare_text (const char *lhs, const char *rhs)
       int cc_string_compare_subtext (const cc_string *me, const char *text, int offset)
       void cc_string_apply (cc_string *string, cc_apply_f function)
       void cc_string_sprintf (cc_string *me, const char *formatstr,...)
       void cc_string_vsprintf (cc_string *me, const char *formatstr, va_list args)

Detailed Description
       The cc_string type is a C ADT for ASCII string management.

       This is a Coin extension.

Author
       Generated automatically by Doxygen for Coin from the source code.

Version 3.1.3							  Wed May 23 2012						      cc_string(3)
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