Run-time Library Reference (Windows CE 5.0)

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Developing an Application > Microsoft C Run-time Library for Windows CE

This section contains the alphabetical list of the C run-time functions supported by Windows CE.

Routine	Use
__isascii, iswascii	Determines if character is ASCII.
_alloca	Allocates memory from stack.
_cabs	Finds absolute value of complex number.
_chgsign	Reverses sign of double-precision floating-point argument.
_copysign	Returns one value with sign of another.
_ecvt	Converts double to string of specified length.
_ecvt	Converts double to character string of specified length.
_fcvt	Converts double to string with specified number of digits following decimal point.
_fcvt	Converts double to string with specified number of digits following decimal point.
_fileno	Gets file handle associated with stream.
_finite	Determines whether given double-precision floating-point value is finite.
_flushall	Flushes all streams to buffer or storage device.
_fpclass	Returns status word containing information on floating-point class.
_fpieee_flt	Invokes user-defined trap handler for IEEE floating-point exceptions.
_fpreset	Reinitializes floating-point math package.
_gcvt	Converts double number to string; store string in buffer.
_gcvt	Converts floating-point value to character string.
_hypot	Calculates hypotenuse of right triangle.
_isctype, iswctype	Determines if character is a property specified by parameter.
_isnan	Checks given double-precision floating-point value for not a number (NaN).
_itoa, _itow	Converts int to string.
_j0, _j1, _jn	Calculates Bessel functions _j0, _j1, and _jn.
_logb	Extracts exponential value of double-precision floating-point argument.
_lrotl, _lrotr	Shifts unsigned long int left (_lrotl) or right (_lrotr).
_ltoa, _ltow	Converts long to string.
_memccpy	Copy characters from one buffer to another until given character or given number of characters has been copied.
_memicmp	Compare specified number of characters from two buffers without regard to case.
_msize	Returns size of allocated block.
_nextafter	Returns next representable neighbor.
_rotl, _rotr	Shifts unsigned int left (_rotl) or right (_rotr).
_scalb	Scales argument by power of 2.
_setmode	Sets file translation mode.
_snprintf	Writes formatted data of specified length to string.
_statusfp	Gets floating-point status word.
_strdup, _wcsdup	Duplicates string.
_stricmp, _wcsicmp	Compares two strings without regard to case.
_strlwr, _wcslwr	Converts string to lowercase.
_strnicmp, _wcsnicmp	Compares characters of two strings without regard to case.
_strnset, _wcsnset	Sets first n characters of string to specified character.
_strrev, _wcsrev	Reverses string.
_strset, _wcsset	Sets all characters of string to specified character.
_strupr, _wcsupr	Converts string to uppercase.
_swab	Swap bytes of data and store them at specified location.
_ultoa, _ultow	Converts unsigned long to string.
_vsnprintf, _vsnwprintf	Writes formatted data of specified length to buffer.
_wfdopen	Associates a stream with a file opened for low-level IO.
_wfreopen	Reassigns a file pointer.
_wtoi	Converts wide-character string to integer.
_y0, _y1, _yn	Calculates Bessel functions _yo, _y1, and _yn.
abs	Finds absolute value of integer.
abs	Returns absolute value of int.
acos	Calculates arccosine.
asin	Calculates arcsine.
atan, atan2	Calculates arctangent.
atof	Converts string to float.
atof	Converts character string to double-precision floating-point value.
atoi	Converts string to int.
atol, wtol	Converts string to long.
calloc	Allocates storage for array, initializing every byte in allocated block to 0.
ceil	Finds integer ceiling.
clearerr	Clears error.
clearerr	Clears error indicator for stream.
cosh	Calculates hyperbolic cosine.
cos	Calculates cosine.
div	Divides one integer by another, returning quotient and remainder.
exp	Calculates exponential function.
fabs	Finds absolute value.
fclose, _fcloseall	Closes stream.
feof	Tests for end of file on stream.
ferror	Tests for error on stream.
fflush	Flushes stream to buffer or storage device.
fgetc, fgetwc	Reads character from stream.
fgetpos	Gets position indicator of stream.
fgets, fgetws	Reads string from stream.
floor	Finds largest integer less than or equal to argument.
fmod	Finds floating-point remainder.
fopen, _wfopen	Opens stream.
fprintf, fwprintf	Writes formatted data to stream.
fputc, fputwc	Writes a character to a stream.
fputs, fputws	Writes string to stream.
fread	Reads unformatted data from stream.
free	Frees allocated block.
frexp	Calculates exponential value.
fscanf, fwscanf	Reads formatted data from stream.
fseek	Moves file position to given location.
fsetpos	Sets position indicator of stream.
ftell	Gets current file position.
fwrite	Writes unformatted data items to stream.
getchar, getwchar	Reads character from stdin.
gets, _getws	Reads line from stdin.
isalnum, iswalnum	Determines if character is alphanumeric.
isalpha, iswalpha	Determines if character is alphabetic.
iscntrl, iswcntrl	Determines if character is a control.
isdigit, iswdigit	Determines if character is a decimal digit.
isgraph, iswgraph	Determines if character is printable, other than space.
islower, iswlower	Determines if character is lowercase.
isprint, iswprint	Determines if character is printable.
ispunct, iswpunct	Determines if character is punctuation.
isspace, iswspace	Determines if character is white-space.
isupper, iswupper	Determines if character is uppercase.
isxdigit, iswxdigit	Determines if character is a hexadecimal digit.
labs	Finds absolute value of long integer.
labs	Returns absolute value of long.
ldexp	Calculates product of argument and 2 to specified power.
ldiv	Divides one long integer by another, returning quotient and remainder.
log, log10	Calculates logarithm.
longjmp	Restores saved stack environment; uses it to execute a non-local goto.
malloc	Allocates block of memory from heap.
memchr, wmemchr	Return pointer to first occurrence, within specified number of characters, of given character in buffer.
memcmp, wmemcmp	Compare specified number of characters from two buffers.
memcpy, wmemcpy	Copy specified number of characters from one buffer to another.
memmove	Copy specified number of characters from one buffer to another.
memset, wmemset	Use given character to initialize specified number of bytes in the buffer.
modf	Splits argument into integer and fractional parts.
pow	Calculates value raised to a power.
printf, wprintf	Writes formatted data to stdout.
putchar, putwchar	Writes character to stdout.
puts, _putws	Writes line to stream.
qsort	Quick sorts.
rand	Gets pseudorandom number.
realloc	Reallocates block to new size.
scanf, wscanf	Reads formatted data from stdin.
setjmp	Saves stack environment; uses it to execute nonlocal goto.
sinh	Calculates hyperbolic sine.
sin	Calculates sine.
sprintf, swprintf	Writes formatted data to string.
sprintf, swprintf	Writes formatted data to a string.
sqrt	Finds square root.
srand	Initializes pseudorandom series.
sscanf, swscanf	Reads formatted data from string.
strcat, wcscat	Appends one string to another.
strchr, wcschr	Finds first occurrence of specified character in string.
strcmp, wcscmp	Compares two strings.
strcpy, wcscpy	Copies one string to another.
strcspn, wcscspn	Finds first occurrence of character from specified character set in string.
strlen, wcslen	Finds length of string.
strncat, wcsncat	Appends characters of string.
strncmp, wcsncmp	Compares characters of two strings.
strncpy, wcsncpy	Copies characters of one string to another.
strpbrk, wcspbrk	Finds first occurrence of character from one string in another string.
strrchr, wcsrchr	Finds last occurrence of given character in string.
strspn, wcsspn	Finds first substring from one string in another string.
strstr, wcsstr	Finds first occurrence of specified string in another string.
strtod, wcstod	Converts string to double.
strtod, wcstod	Converts to double-precision value.
strtod	Converts character string to double-precision value.
strtok, wcstok	Finds next token in string.
strtol, wcstol	Converts string to long integer.
strtol, wcstol	Converts to long integer value.
strtoul, wcstoul	Converts string to unsigned long integer.
strtoul, wcstoul	Converts to unsigned long integer value.
tanh	Calculates hyperbolic tangent.
tan	Calculates tangent.
towlower	Tests character and converts to lowercase if currently uppercase.
towupper	Tests character and converts to uppercase if currently lowercase.
ungetc, ungetwc	Pushes character back onto stream.
vfprintf, vfwprintf	Writes formatted data to stream.
vprintf, vwprintf	Writes formatted data to stdout.
vsprintf, vswprintf	Writes formatted data to buffer.
wcstombs	Converts wide character to corresponding multi-byte character.

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