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Add an S_COR macro, which is similar to the existing S_OR macro,

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except with an additional boolean arg.

A hack such as:
foo ? S_OR(bar, "baz") : "baz"
becomes:
S_COR(foo, bar, "baz")


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89683 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jason Parker
2007-11-27 19:12:33 +00:00
parent ab92fc1f35
commit 35ecd08b46
1 changed files with 7 additions and 1 deletions
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8
include/asterisk/strings.h
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@@ -37,7 +37,13 @@ static force_inline int ast_strlen_zero(const char *s)
/*! \brief returns the equivalent of logic or for strings:
* first one if not empty, otherwise second one.
*/
#define S_OR(a, b) (!ast_strlen_zero(a) ? (a) : (b))
#define S_OR(a, b) (!ast_strlen_zero(a) ? (a) : (b))
/*! \brief returns the equivalent of logic or for strings, with an additional boolean check:
* second one if not empty and first one is true, otherwise third one.
* example: S_COR(usewidget, widget, "<no widget>")
*/
#define S_COR(a, b, c) ((a && !ast_strlen_zero(b)) ? (b) : (c))
/*!
\brief Gets a pointer to the first non-whitespace character in a string.