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Default un-supplied command arguments to the empty string and zero rather than leaving them potentially un-initialised. This makes it safe for commands to compare argument strings without adding the expense of checking argc first. 

git-svn-id: https://arducopter.googlecode.com/svn/trunk@760 f9c3cf11-9bcb-44bc-f272-b75c42450872
This commit is contained in:
DrZiplok@gmail.com 2010-11-01 03:40:54 +00:00
parent 1adfde9ff6
commit c39639045c
1 changed files with 9 additions and 0 deletions
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9
libraries/AP_Common/menu.cpp
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@ -86,6 +86,15 @@ Menu::run(void)
argc++; argc++;
} }
// populate arguments that have not been specified with "" and 0
// this is safer than NULL in the case where commands may look
// without testing argc
while (argc <= MENU_ARGS_MAX) {
_argv[argc].str = "";
_argv[argc].i = 0;
_argv[argc].f = 0;
}
// look for a command matching the first word (note that it may be empty) // look for a command matching the first word (note that it may be empty)
for (i = 0; i < _entries; i++) { for (i = 0; i < _entries; i++) {
if (!strcasecmp_P(_argv[0].str, _commands[i].command)) { if (!strcasecmp_P(_argv[0].str, _commands[i].command)) {