Datasheet

The C and C++ Libraries
4-96 Copyright © 1999-2001 ARM Limited. All rights reserved. ARM DUI 0067D
• A file can be opened many times for reading, but only once for writing or
updating. A file cannot simultaneously be open for reading on one stream, and
open for writing or updating on another.
• Local time zones and Daylight Saving Time are not implemented. The values
returned indicate that the information is not available. For example, the
gmtime()
function always returns NULL.
• The status returned by
exit() is the same value that was passed to it. For
definitions of
EXIT_SUCCESS and EXIT_FAILURE , see the header file stdlib.h . The
semihosting SWI, however, does not pass the status back to the execution
environment.
• The error messages returned by the
strerror() function are identical to those
given by the
perror() function.
• If the size of area requested is zero,
calloc() , malloc() , and realloc() return NULL .
•
abort() closes all open files and deletes all temporary files.
•
fprintf() prints %p arguments in lowercase hexadecimal format as if a precision
of 8 had been specified. If the variant form (
%#p ) is used, the number is preceded
by the character
@ .
•
fscanf() treats %p arguments exactly the same as %x arguments.
•
fscanf() always treats the character "-" in a %...[...] argument as a literal
character.
•
ftell() and fgetpos() set errno to the value of EDOM on failure.
•
perror() generates the messages in Table 4-19.
Table 4-19 perror() messages
Error Message
0 No error (errno = 0)
EDOM EDOM - function argument out of range
ERANGE ERANGE - function result not representable
ESIGNUM ESIGNUM - illegal signal number
Others Unknown error