Text utilities

This module defines a set of functions to work with text strings. More...

Files
file	str.h
	SCEW string functions.
Defines
#define	scew_memcpy(dst, src, n)   memcpy (dst, src, sizeof (XML_Char) * (n))
	Copy the number of given characters from src to dst.
#define	scew_memmove(dst, src, n)   memmove (dst, src, sizeof (XML_Char) * (n))
	Move the number of given characters from src to dst.
#define	_XT(str)   str
	Creates a regular string or a wide character string.
#define	scew_printf   printf
	See standard printf documentation.
#define	scew_fprintf   fprintf
	See standard fprintf documentation.
#define	scew_vfprintf   vfprintf
	See standard vfprintf documentation.
#define	scew_fputs   fputs
	See standard fputs documentation.
#define	scew_fgets   fgets
	See standard fgets documentation.
#define	scew_fputc   fputc
	See standard fputc documentation.
#define	scew_fgetc   fgetc
	See standard fgetc documentation.
#define	scew_strspn(s, accept)   strspn (s, accept)
	See standard strspn documentation.
#define	scew_strcpy(dest, src)   strcpy (dest, src)
	See standard strcpy documentation.
#define	scew_strcat(dest, src)   strcat (dest, src)
	See standard strcat documentation.
#define	scew_strncpy(dest, src, n)   strncpy (dest, src, (n))
	See standard strncpy documentation.
#define	scew_strncat(dest, src, n)   strncat (dest, src, (n))
	See standard strncat documentation.
#define	scew_strlen(s)   strlen (s)
	See standard strlen documentation.
#define	scew_isalnum(c)   isalnum ((unsigned char)(c))
	See standard isalnum documentation.
#define	scew_isalpha(c)   isalpha ((unsigned char)(c))
	See standard isalpha documentation.
#define	scew_iscntrl(c)   iscntrl ((unsigned char)(c))
	See standard iscntrl documentation.
#define	scew_isdigit(c)   isdigit ((unsigned char)(c))
	See standard isdigit documentation.
#define	scew_isxdigit(c)   isxdigit ((unsigned char)(c))
	See standard isxdigit documentation.
#define	scew_isgraph(c)   isgraph ((unsigned char)(c))
	See standard isgraph documentation.
#define	scew_islower(c)   islower ((unsigned char)(c))
	See standard islower documentation.
#define	scew_isupper(c)   isupper ((unsigned char)(c))
	See standard isupper documentation.
#define	scew_isprint(c)   isprint ((unsigned char)(c))
	See standard isprint documentation.
#define	scew_ispunct(c)   ispunct ((unsigned char)(c))
	See standard ispunct documentation.
#define	scew_isspace(c)   isspace ((unsigned char)(c))
	See standard isspace documentation.
Functions
SCEW_API int	scew_strcmp (XML_Char const *a, XML_Char const *b)
	Compares the two given strings s1 and s2.
SCEW_API XML_Char *	scew_strdup (XML_Char const *src)
	Creates a new copy of the given string.
SCEW_API void	scew_strtrim (XML_Char *src)
	Trims off extra spaces from the beginning and end of a string.
SCEW_API scew_bool	scew_isempty (XML_Char const *src)
	Tells whether the given string is empty.
XML_Char *	scew_strescape (XML_Char const *src)
	Escapes the given string for XML.

---

Detailed Description

This module defines a set of functions to work with text strings.

SCEW has defined wrappers for standard C routines in order to work with regular and wide character strings (wchar_t). The wrappers are simple macros to call the appropiate functions in both cases.

Right now, wide character strings are only availabe in Windows platforms to provide UTF-16 support (XML_UNICODE_WCHAR_T needs to be defined at compile time).

---

Define Documentation

#define scew_memcpy	(	dst,
		src,
		n		)	memcpy (dst, src, sizeof (XML_Char) * (n))

Copy the number of given characters from src to dst.

See standard memcpy documentation.

#define scew_memmove	(	dst,
		src,
		n		)	memmove (dst, src, sizeof (XML_Char) * (n))

Move the number of given characters from src to dst.

See standard memmove documentation.

---

Function Documentation

SCEW_API int scew_strcmp	(	XML_Char const *	a,
		XML_Char const *	b
	)

Compares the two given strings s1 and s2.

Returns:

0 if the two strings are identical or NULL, less than zero if s1 is less than s2 or greater than zero otherwise.

SCEW_API XML_Char* scew_strdup

(

XML_Char const *

src

)

Creates a new copy of the given string.

Parameters:

src

the string to be duplicated (might be NULL).

Returns:

the duplicated string, or NULL if the given string is NULL.

SCEW_API void scew_strtrim

(

XML_Char *

src

)

Trims off extra spaces from the beginning and end of a string.

The trimming is done in place.

Precondition:

src != NULL

Parameters:

src

the string to be trimmed off.

SCEW_API scew_bool scew_isempty

(

XML_Char const *

src

)

Tells whether the given string is empty.

That is, all characters are spaces, form-feed, newlines, etc. See isspace documentation to see the list of characters considered space.

Precondition:

src != NULL

Parameters:

src

the string to tell if its empty or not.

Returns:

true if the given string is empty, false otherwise.

XML_Char* scew_strescape

(

XML_Char const *

src

)

Escapes the given string for XML.

This will substitute the general XML delimiters:

< > & ' " 

to the pre-defined XML entities, respectively:

< > & ' " 

A new escaped string will be allocated. Thus, the user is responsible of freeing the new string.

Precondition:

src != NULL

Parameters:

src

the string to be escaped.

Returns:

a new allocated string with the XML delimiters (if any) escaped.