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lib: Add CMD_RANGE_STR macro to command.h

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Allow the auto-generation of a "<X-Y>" string for cli handline.
Where X or Y can be a #define.

CMD_RANGE_STR(LOW, HIGH) translates to:
"<4-99>"

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2015-12-08 17:06:42 +00:00
parent 5b964da3c5
commit ba6d273b00
1 changed files with 11 additions and 0 deletions
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11
lib/command.h
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@ -437,6 +437,17 @@ struct cmd_token
#endif /* VTYSH_EXTRACT_PL */
/* Some macroes */
/*
* Sometimes #defines create maximum values that
* need to have strings created from them that
* allow the parser to match against them.
* These macros allow that.
*/
#define CMD_CREATE_STR(s) CMD_CREATE_STR_HELPER(s)
#define CMD_CREATE_STR_HELPER(s) #s
#define CMD_RANGE_STR(a,s) "<" CMD_CREATE_STR(a) "-" CMD_CREATE_STR(s) ">"
#define CMD_OPTION(S) ((S[0]) == '[')
#define CMD_VARIABLE(S) (((S[0]) >= 'A' && (S[0]) <= 'Z') || ((S[0]) == '<'))
#define CMD_VARARG(S) ((S[0]) == '.')