05-24-2012
I believe the first two match digits at the end of a string, the first one without h on the end, the second with h on the end. Possibly with intention of grabbing it from the $1 etc specials later.
The third deletes any 'h' characters in the string.
Without more context it's difficult to explain why they're doing that.
Especially when you could just use find.
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LEARN ABOUT CENTOS
xmstringunparse
XmStringUnparse(library call) XmStringUnparse(library call)
NAME
XmStringUnparse -- A compound string function that unparses text
SYNOPSIS
#include <Xm/Xm.h>
XtPointer XmStringUnparse(
XmString string,
XmStringTag tag,
XmTextType tag_type,
XmTextType output_type,
XmParseTable parse_table,
Cardinal parse_count,
XmParseModel parse_model);
DESCRIPTION
XmStringUnparse looks in the input string for text segments that are tagged with locale or charset tags that match tag. The tag_type param-
eter specifies whether the tag is a locale or charset type. If tag has a value of NULL, all the segments are matched. When a text segment
is found with a matching tag, it is added to the end of a resulting string. The characters in the resulting string are of type output_type.
XmStringUnparse also checks string for components that match components in parse_table, and also to see if the component matches the condi-
tion specified by parse_model. If the string component matches in both checks, then the associated character is added to the end of the
resulting string.
string Specifies the XmString to be converted.
tag Specifies the tag to be used in matching with text segments. Only text segments that match tag will be included in the resulting
string. If tag has a value of NULL, all segments are considered as matches, and tag_type is ignored.
tag_type Specifies the type of tag to be searched for, including XmMULTIBYTE_TEXT, XmWIDECHAR_TEXT, and XmCHARSET_TEXT.
output_type
Specifies the type of text to be returned in the string, including XmMULTIBYTE_TEXT, XmWIDECHAR_TEXT, and XmCHARSET_TEXT.
parse_table
Specifies the parse table to be used in scanning for compound string components to be converted to other characters.
parse_count
Specifies how many entries are in parse_table.
parse_model
Specifies which non-text components to be considered in matching in parse_table. These include:
XmOUTPUT_ALL
Puts out all matching components.
XmOUTPUT_BETWEEN
Puts out only those matching components that are between two matching text components.
XmOUTPUT_BEGINNING
Puts out only those matching components that are at the beginning of a matching text component.
XmOUTPUT_END
Puts out only those matching components that are at the end of a matching text component.
XmOUTPUT_BOTH
Puts out only those matching components that are at the beginning or end of a matching text component.
RETURN
Returns a newly allocated string containing characters of a type determined by output_type. The application is responsible for managing
this allocated space. The application can recover this allocated space by calling XtFree.
RELATED
XmString(3), XmParseTable(3), XmParseMapping(3).
XmStringUnparse(library call)