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Chapter 1 ANSI C Library
© National Instruments Corporation 1-5 LabWindows/CVI Standard Libraries
• islower maps to the Windows function isCharLower.
• isupper maps to the Windows function isCharUpper.
• tolower maps to the Windows function AnsiLower.
• toupper maps to the Windows function AnsiUpper.
For the LC_TIME locale:
• strftime uses the following items from the WIN.INI file for the appropriate format
specifiers: sTime, iTime, s1159, s2359, iTLZero, sShortDate, and sLongDate.
• The names of the weekdays and the names of the months match the language version of
LabWindows/CVI. That is, a German version of LabWindows/CVI would use the German
names of months and days.
For the LC_COLLATE locale:
• strcoll maps to the Windows function lstrcmp.
Because LabWindows/CVI does not support extended character sets that require more than a
byte per character, a multibyte character in LabWindows/CVI is actually a single byte character.
Likewise, a multibyte sequence is a sequence of single byte characters. Because a multibyte
character is the same as a wide character, the conversion functions described in these sections do
little more than return their inputs as outputs.
Character Processing
LabWindows/CVI implements all the ANSI C character processing facilities as both macros and
functions. The macros are disabled when the LabWindows/CVI debugging level is set to
Standard or Extended, so that user protection is available for the arguments to the functions.
String Processing
Under UNIX, the strcoll function is equivalent to strcmp and its behavior is not affected by
the LC_COLLATE locale. Under Windows, strcoll is equivalent to the Windows function
lstrcmp. For both platforms, the function strxfrm performs a string copy using strncpy
and returns the length of its second argument.