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Diffstat (limited to 'lib/system.h')
| -rw-r--r-- | lib/system.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/lib/system.h b/lib/system.h new file mode 100644 index 00000000..f31cfd03 --- /dev/null +++ b/lib/system.h @@ -0,0 +1,185 @@ +/* Declarations for common convenience functions. + Copyright (C) 2006-2011 Red Hat, Inc. + This file is part of elfutils. + + This file is free software; you can redistribute it and/or modify + it under the terms of either + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at + your option) any later version + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at + your option) any later version + + or both in parallel, as here. + + elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see <http://www.gnu.org/licenses/>. */ + +#ifndef LIB_SYSTEM_H +#define LIB_SYSTEM_H 1 + +#include <argp.h> +#include <stddef.h> +#include <stdint.h> +#include <endian.h> +#include <byteswap.h> +#include <unistd.h> + +#if __BYTE_ORDER == __LITTLE_ENDIAN +# define LE32(n) (n) +# define LE64(n) (n) +# define BE32(n) bswap_32 (n) +# define BE64(n) bswap_64 (n) +#elif __BYTE_ORDER == __BIG_ENDIAN +# define BE32(n) (n) +# define BE64(n) (n) +# define LE32(n) bswap_32 (n) +# define LE64(n) bswap_64 (n) +#else +# error "Unknown byte order" +#endif + +extern void *xmalloc (size_t) __attribute__ ((__malloc__)); +extern void *xcalloc (size_t, size_t) __attribute__ ((__malloc__)); +extern void *xrealloc (void *, size_t) __attribute__ ((__malloc__)); + +extern char *xstrdup (const char *) __attribute__ ((__malloc__)); +extern char *xstrndup (const char *, size_t) __attribute__ ((__malloc__)); + + +extern uint32_t crc32 (uint32_t crc, unsigned char *buf, size_t len); +extern int crc32_file (int fd, uint32_t *resp); + +/* A special gettext function we use if the strings are too short. */ +#define sgettext(Str) \ + ({ const char *__res = strrchr (gettext (Str), '|'); \ + __res ? __res + 1 : Str; }) + +#define gettext_noop(Str) Str + + +static inline ssize_t __attribute__ ((unused)) +pwrite_retry (int fd, const void *buf, size_t len, off_t off) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (pwrite (fd, buf + recvd, len - recvd, + off + recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} + +static inline ssize_t __attribute__ ((unused)) +write_retry (int fd, const void *buf, size_t len) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (write (fd, buf + recvd, len - recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} + +static inline ssize_t __attribute__ ((unused)) +pread_retry (int fd, void *buf, size_t len, off_t off) +{ + ssize_t recvd = 0; + + do + { + ssize_t ret = TEMP_FAILURE_RETRY (pread (fd, buf + recvd, len - recvd, + off + recvd)); + if (ret <= 0) + return ret < 0 ? ret : recvd; + + recvd += ret; + } + while ((size_t) recvd < len); + + return recvd; +} + + +/* We need define two variables, argp_program_version_hook and + argp_program_bug_address, in all programs. argp.h declares these + variables as non-const (which is correct in general). But we can + do better, it is not going to change. So we want to move them into + the .rodata section. Define macros to do the trick. */ +#define ARGP_PROGRAM_VERSION_HOOK_DEF \ + void (*const apvh) (FILE *, struct argp_state *) \ + __asm ("argp_program_version_hook") +#define ARGP_PROGRAM_BUG_ADDRESS_DEF \ + const char *const apba__ __asm ("argp_program_bug_address") + + +/* The demangler from libstdc++. */ +extern char *__cxa_demangle (const char *mangled_name, char *output_buffer, + size_t *length, int *status); + + + +/* Color handling. */ + +/* Command line parser. */ +extern const struct argp color_argp; + +/* Coloring mode. */ +enum color_enum + { + color_never = 0, + color_always, + color_auto + } __attribute__ ((packed)); +extern enum color_enum color_mode; + +/* Colors to use for the various components. */ +extern char *color_address; +extern char *color_bytes; +extern char *color_mnemonic; +extern char *color_operand1; +extern char *color_operand2; +extern char *color_operand3; +extern char *color_label; +extern char *color_undef; +extern char *color_undef_tls; +extern char *color_undef_weak; +extern char *color_symbol; +extern char *color_tls; +extern char *color_weak; + +extern const char color_off[]; + +/* A static assertion. This will cause a compile-time error if EXPR, + which must be a compile-time constant, is false. */ + +#define eu_static_assert(expr) \ + extern int never_defined_just_used_for_checking[(expr) ? 1 : -1] \ + __attribute__ ((unused)) + +#endif /* system.h */ |