 RealView Libraries and Floating Point Support Guide | |
| Home Products Events Support | |
On-Line Manuals
RealView Libraries and Floating Point Support Guide
Preface Introduction The C and C++ Libraries About the C and C++ libraries
Features of the C and C++ libraries Namespaces Writing reentrant and thread‑safe code Introduction to reentrancy and thread‑safety Use of static data in the C libraries The __user_libspace static data area Managing locks in multithreaded applications Using the ARM C libraries with a multithreaded app Thread‑safety in the ARM C libraries Thread‑safety in the ARM C++ libraries Building an application with the C library Using the libraries with an application Building an application for a semihosted environme Building an application for a non semihosting envi Building an application without the C library Integer and FP helper functions Bare machine integer C Bare machine C with floating‑point Exploiting the C library The standalone C library functions Tailoring the C library to a new execution environ How C and C++ programs use the library functions __rt_entry Exiting from the program __rt_exit() __rt_lib_init() __rt_lib_shutdown() Tailoring static data access Tailoring locale and CTYPE using assembler macros Selecting locale at link time Selecting locale at runtime Defining a locale block LC_CTYPE data block LC_COLLATE data block LC_MONETARY data block LC_NUMERIC data block LC_TIME data block _get_lconv() localeconv() setlocale() _findlocale() The lconv structure Tailoring locale and CTYPE using C macros Selecting locale at link time Selecting locale at runtime Macros and utility functions _get_lc_ctype() _get_lc_collate() _get_lc_monetary() _get_lc_numeric() _get_lc_time() _get_lconv() localeconv() setlocale() _findlocale() __LC_CTYPE_DEF __LC_COLLATE_DEF __LC_TIME_DEF __LC_NUMERIC_DEF __LC_MONETARY_DEF __LC_INDEX_END The lconv structure Tailoring error signaling, error handling, and pro _sys_exit() errno __rt_errno_addr() __raise() __rt_raise() __default_signal_handler() _ttywrch() __rt_fp_status_addr() Tailoring storage management Avoiding the ARM‑supplied heap and heap‑using Support for malloc Tailoring the runtime memory model The memory models Controlling the runtime memory model Writing your own memory model __user_initial_stackheap() __user_setup_stackheap() __user_heap_extend() __user_heap_extent() __user_stack_cleanup_space() __rt_heap_extend() __rt_stack_postlongjmp() Tailoring the input/output functions Dependencies on low‑level functions Target‑dependent input/output support functions _sys_open() _sys_close() _sys_read() _sys_write() _sys_ensure() _sys_flen() _sys_seek() _sys_istty() _sys_tmpnam() _sys_command_string() #pragma import(_main_redirection) Tailoring other C library functions clock() _clock_init() time() remove() rename() system() getenv() _getenv_init() Selecting real‑time division ISO implementation definition ISO C library implementation definition Standard C++ library implementation definition C library extensions atoll() strtoll() strtoull() printf() snprintf() vsnprintf() lldiv() llabs() wcstombs() alloca() strlcpy() strlcat() _fisatty() __heapstats() __heapvalid() Library naming conventions Placing ARM libraries Helper libraries Identifying library variants The C Micro-library Floating‑point Support__LC_CTYPE_DEF
  | |||
  |  | ||
| |||
| Home > The C and C++ Libraries > Tailoring locale and CTYPE using C macros > __LC_CTYPE_DEF | |||
This macro is used to create CTYPE blocks. The definition from rt_locale.h and sample code are shown in Example 2.16. This example is incomplete, so see the rt_locale.h include file for more information.
Example 2.16. LC_CTYPE_DEF
#define __LC_CTYPE_DEF(sym,ln) \ static const int sym##_index = ~3 & (3 + (268+(~3 & (3 + sizeof(ln))))); \ static const char sym##_lname[~3 & (3 + sizeof(ln))] = ln; \ static const int sym##_pname = ‑4‑(~3 & (3 + sizeof(ln))); \ static const char sym##_start = 0; \ static const char sym##_table[256] =
For all the macros, the first two arguments are a symbol prefix and a locale name. The resulting locale block is addressed by the expression &symprefix_start, and the index entry by the expression &symprefix_index.
See _get_lc_ctype().
Note
Because the compiler optimizes the data segment, it reorders and removes parts of locale definitions, and breaks the data structures. The code examples provided are for informational purposes only. In practice, the definitions require additional pragmas to disable optimizations. These are specified in rt_locale.h as follows:
#define __lblk_start _Pragma("push_once Ono_remove_unused_constdata \ Ono_data_reorder")
#define __lblk_end _Pragma("pop")
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0378A |
 PDF version | |
| Home > The C and C++ Libraries > Tailoring locale and CTYPE using C macros > __LC_CTYPE_DEF | |
| |
| Contact Site Map Press Privacy | Copyright © 2008 Keil™, An ARM® Company. All rights reserved. |
