emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bc: move declarations around, no code changes

Browse Source 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-11 17:56:09 +01:00
parent c355c4a7d6
commit c2d15dff42
1 changed files with 39 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
miscutils/bc.c
View File

@ -221,20 +221,6 @@ typedef struct BcNum {
#define BC_NUM_KARATSUBA_LEN (32) #define BC_NUM_KARATSUBA_LEN (32)
typedef void (*BcNumDigitOp)(size_t, size_t, bool) FAST_FUNC;
typedef BcStatus (*BcNumBinaryOp)(BcNum *, BcNum *, BcNum *, size_t) FAST_FUNC;
static BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_pow(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_sqrt(BcNum *a, BcNum *b, size_t scale);
static BcStatus bc_num_divmod(BcNum *a, BcNum *b, BcNum *c, BcNum *d,
size_t scale);
typedef enum BcInst { typedef enum BcInst {
#if ENABLE_BC #if ENABLE_BC
@ -931,6 +917,45 @@ dc_parse_insts[] = {
}; };
#endif // ENABLE_DC #endif // ENABLE_DC
// In configurations where errors abort instead of propagating error
// return code up the call chain, functions returning BC_STATUS
// actually don't return anything, they always succeed and return "void".
// A macro wrapper is provided, which makes this statement work:
// s = zbc_func(...)
// and makes it visible to the compiler that s is always zero,
// allowing compiler to optimize dead code after the statement.
//
// To make code more readable, each such function has a "z"
// ("always returning zero") prefix, i.e. zbc_foo or zdc_foo.
//
#if ENABLE_FEATURE_BC_SIGNALS || ENABLE_FEATURE_CLEAN_UP
# define ERRORFUNC /*nothing*/
# define ERROR_RETURN(a) a
# define ERRORS_ARE_FATAL 0
# define BC_STATUS BcStatus
# define RETURN_STATUS(v) return (v)
#else
# define ERRORFUNC NORETURN
# define ERROR_RETURN(a) /*nothing*/
# define ERRORS_ARE_FATAL 1
# define BC_STATUS void
# define RETURN_STATUS(v) do { ((void)(v)); return; } while (0)
#endif
typedef void (*BcNumDigitOp)(size_t, size_t, bool) FAST_FUNC;
typedef BcStatus (*BcNumBinaryOp)(BcNum *, BcNum *, BcNum *, size_t) FAST_FUNC;
static BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_pow(BcNum *a, BcNum *b, BcNum *c, size_t scale) FAST_FUNC;
static BcStatus bc_num_sqrt(BcNum *a, BcNum *b, size_t scale);
static BcStatus bc_num_divmod(BcNum *a, BcNum *b, BcNum *c, BcNum *d,
size_t scale);
static const BcNumBinaryOp bc_program_ops[] = { static const BcNumBinaryOp bc_program_ops[] = {
bc_num_pow, bc_num_mul, bc_num_div, bc_num_mod, bc_num_add, bc_num_sub, bc_num_pow, bc_num_mul, bc_num_div, bc_num_mod, bc_num_add, bc_num_sub,
}; };
@ -976,31 +1001,6 @@ static void bc_verror_msg(const char *fmt, va_list p)
} }
} }
// In configurations where errors abort instead of propagating error
// return code up the call chain, functions returning BC_STATUS
// actually don't return anything, they always succeed and return "void".
// A macro wrapper is provided, which makes this statement work:
// s = zbc_func(...)
// and makes it visible to the compiler that s is always zero,
// allowing compiler to optimize dead code after the statement.
//
// To make code more readable, each such function has a "z"
// ("always returning zero") prefix, i.e. zbc_foo or zdc_foo.
//
#if ENABLE_FEATURE_BC_SIGNALS || ENABLE_FEATURE_CLEAN_UP
# define ERRORFUNC /*nothing*/
# define ERROR_RETURN(a) a
# define ERRORS_ARE_FATAL 0
# define BC_STATUS BcStatus
# define RETURN_STATUS(v) return (v)
#else
# define ERRORFUNC NORETURN
# define ERROR_RETURN(a) /*nothing*/
# define ERRORS_ARE_FATAL 1
# define BC_STATUS void
# define RETURN_STATUS(v) do { ((void)(v)); return; } while (0)
#endif
static NOINLINE ERRORFUNC int bc_error_fmt(const char *fmt, ...) static NOINLINE ERRORFUNC int bc_error_fmt(const char *fmt, ...)
{ {
va_list p; va_list p;