NAME
ustr_const - ustr string library constants
SYNOPSIS
#include "ustr.h"
USTR_CONF_INCLUDE_CODEONLY_HEADERS
USTR_CONF_USE_EOS_MARK
USTR_CONF_USE_ASSERT
USTR_CONF_COMPILE_USE_ATTRIBUTES
USTR_CONF_COMPILE_TYPEDEF
USTR_CONF_COMPILE_USE_INLINE
USTR_BEG_CONST1
USTR_BEG_CONST2
USTR_BEG_CONST4
USTR_BEG_FIXED1
USTR_BEG_FIXED2
USTR_BEG_FIXED4
USTR_BEG_FIXED8
USTR_END_ALOCDx
USTR_END_CONSTx
USTR_END_FIXEDx
USTR_FLAG_PARSE_NUM_DEF
USTR_FLAG_PARSE_NUM_SEP
USTR_FLAG_PARSE_NUM_OVERFLOW
USTR_FLAG_PARSE_NUM_SPACE
USTR_FLAG_PARSE_NUM_NO_BEG_ZERO
USTR_FLAG_PARSE_NUM_NO_BEG_PM
USTR_FLAG_PARSE_NUM_NO_NEGATIVE
USTR_FLAG_PARSE_NUM_EXACT
USTR_TYPE_PARSE_NUM_ERR_NONE
USTR_TYPE_PARSE_NUM_ERR_ONLY_S
USTR_TYPE_PARSE_NUM_ERR_ONLY_SPM
USTR_TYPE_PARSE_NUM_ERR_ONLY_SPMX
USTR_TYPE_PARSE_NUM_ERR_OOB
USTR_TYPE_PARSE_NUM_ERR_OVERFLOW
USTR_TYPE_PARSE_NUM_ERR_NEGATIVE
USTR_TYPE_PARSE_NUM_ERR_BEG_ZERO
USTR_FLAG_SPLIT_DEF
USTR_FLAG_SPLIT_RET_SEP
USTR_FLAG_SPLIT_RET_NON
USTR_FLAG_SPLIT_KEEP_CONFIG
USTR_NULL
USTR_POOL_NULL
USTR_TRUE
USTR_FALSE
USTR_CNTL_OPT_GET_REF_BYTES
USTR_CNTL_OPT_SET_REF_BYTES
USTR_CNTL_OPT_GET_HAS_SIZE
USTR_CNTL_OPT_SET_HAS_SIZE
USTR_CNTL_OPT_GET_EXACT_BYTES
USTR_CNTL_OPT_SET_EXACT_BYTES
USTR_CNTL_OPT_GET_MEM
USTR_CNTL_OPT_SET_MEM
USTR_CNTL_OPT_GET_MC_M_SCRUB
USTR_CNTL_OPT_SET_MC_M_SCRUB
USTR_CNTL_OPT_GET_MC_F_SCRUB
USTR_CNTL_OPT_SET_MC_F_SCRUB
USTR_CNTL_OPT_GET_MC_R_SCRUB
USTR_CNTL_OPT_SET_MC_R_SCRUB
USTR_CNTL_OPT_GET_FMT
USTR_CNTL_OPT_SET_FMT
USTR_POOL_LL_CNTL_GET_FREE_CMP
USTR_POOL_LL_CNTL_SET_FREE_CMP
USTR_POOL_LL_CNTL_GET_REALLOC
USTR_POOL_LL_CNTL_SET_REALLOC
DESCRIPTION
Compile switch constants
Constant: USTR_CONF_INCLUDE_CODEONLY_HEADERS
Explanation:
This switch controls whether all the code will be included as inline
functions. Having this be non-zero means that you don’t have to link
against the library.
Constant: USTR_CONF_USE_EOS_MARK
Explanation:
This switch turns on End of String markers, so any bounds overflow
will be noticed by ustr_assert_valid().
Note:
Changing this will not do anything useful unless
USTR_CONF_INCLUDE_CODEONLY_HEADERS is non-zero.
Constant: USTR_CONF_USE_ASSERT
Explanation:
This switch turns USTR_ASSERT() calls on, so the code within them
will be evaluated. Note that there are many calls to
ustr_assert_valid() within USTR_ASSERT() macros and that call is
relatively expensive.
Note:
Changing this will not do anything useful unless
USTR_CONF_INCLUDE_CODEONLY_HEADERS is non-zero.
Constant: USTR_CONF_COMPILE_USE_ATTRIBUTES
Explanation:
This switch controls whether gcc type __attribute__() statements are
used in the public headers headers for the library. If the value is 1
then if they are supported by the compiler that built the library they
will be used, if the value is 0 they won’t be used at all.
Constant: USTR_CONF_COMPILE_TYPEDEF
Explanation:
This switch controls whether typedef will be used for the structs in
the public headers for the library. If the value is 1 then they will be
used, if the value is 0 they won’t be used at all (and your code will
have to use struct tags instead -- note all libraries using ustr should
compile without this option set).
Constant: USTR_CONF_COMPILE_USE_INLINE
Explanation:
This switch controls whether inline functions will be used in a few
cases where the function bodies are very small.
Note:
In some cases this is used so that GCC can eliminate calls to
strlen(), for the *_cstr() functions.
Constants to created fixed/read-only Ustr’s
Constant: USTR_BEG_CONST1
Explanation:
This macro is a constant C-style string of the first byte of a
constant/read-only Ustr that has a length in the range 0-255.
Constant: USTR_BEG_CONST2
Explanation:
This macro is a constant C-style string of the first byte of a
constant/read-only Ustr that has a length in the range 0-65535.
Constant: USTR_BEG_CONST4
Explanation:
This macro is a constant C-style string of the first byte of a
constant/read-only Ustr that has a length in the range 0-4294967295.
Constant: USTR_BEG_FIXED1
Explanation:
This macro is a constant C-style string of the first byte of a fixed
Ustr that has a length in the range 0-255.
Constant: USTR_BEG_FIXED2
Explanation:
This macro is a constant C-style string of the first byte of a fixed
Ustr that has a length in the range 0-65535.
Constant: USTR_BEG_FIXED4
Explanation:
This macro is a constant C-style string of the first byte of a fixed
Ustr that has a length in the range 0-4294967295.
Constant: USTR_BEG_FIXED8
Explanation:
This macro is a constant C-style string of the first byte of a fixed
Ustr that has a length in the range 0-18446744073709551615.
Note:
This macro is only available if the Ustr code was compiled in a 64bit
environment.
Constant: USTR_END_ALOCDx
Explanation:
This macro is a constant C-style string of the last bytes of an
allocated Ustr.
Note:
Unless USTR_CONF_USE_EOS_MARK is non-zero, this is just the NIL byte.
Constant: USTR_END_CONSTx
Explanation:
This macro is a constant C-style string of the last bytes of a
constant/read-only Ustr.
Note:
Unless USTR_CONF_USE_EOS_MARK is non-zero, this is just the NIL byte.
Constant: USTR_END_FIXEDx
Explanation:
This macro is a constant C-style string of the last bytes of a fixed
Ustr.
Note:
Unless USTR_CONF_USE_EOS_MARK is non-zero, this is just the NIL byte.
Constants to use with parsing numbers: ustr_parse_uintmaxx, etc.
Constant: USTR_FLAG_PARSE_NUM_DEF
Explanation:
Default flags, this is merely 0 but can be used as live
documentation.
Constant: USTR_FLAG_PARSE_NUM_SEP
Explanation:
This flag allows the parsing (and ignoring) of the seperator
character, at arbitrary pointers in the number, so "1234" and "1_234"
would both parse the same (assuming "_" is the seperator).
Constant: USTR_FLAG_PARSE_NUM_OVERFLOW
Explanation:
This flag turns on the overflow checking, in other words without it
USTR_TYPE_PARSE_NUM_ERR_OVERFLOW will never be returned as an error
code.
Constant: USTR_FLAG_PARSE_NUM_SPACE
Explanation:
This flag allows one or more ’ ’ (Space) characters before the number
or number prefix (Plus Sign, Hyphen).
Note:
Other forms of whitespace don’t count, this just affects ’ ’.
Constant: USTR_FLAG_PARSE_NUM_NO_BEG_ZERO
Explanation:
This flag disallows one or more ’0’ (Digit Zero) characters before
the number.
Constant: USTR_FLAG_PARSE_NUM_NO_BEG_PM
Explanation:
This flag disallows a plus or a minus character before the number.
Constant: USTR_FLAG_PARSE_NUM_NO_NEGATIVE
Explanation:
This flag disallows negative values.
Constant: USTR_FLAG_PARSE_NUM_EXACT
Explanation:
This flag makes the parsing functions return an error if the entire
string doesn’t contain the number being parsed.
Constant: USTR_TYPE_PARSE_NUM_ERR_NONE
Explanation:
This error code has the value 0, and means that no error occurred
parsing the number.
Constant: USTR_TYPE_PARSE_NUM_ERR_ONLY_S
Explanation:
This error code means that the Ustr string consisted only of spaces.
Constant: USTR_TYPE_PARSE_NUM_ERR_ONLY_SPM
Explanation:
This error code means that the Ustr string consisted only spaces, and
a plus or minus sign.
Constant: USTR_TYPE_PARSE_NUM_ERR_ONLY_SPMX
Explanation:
This error code means that the Ustr string consisted of only spaces,
a plus or minus sign and a "0x" base 16 prefix.
Constant: USTR_TYPE_PARSE_NUM_ERR_OOB
Explanation:
This error code means that the Ustr string had characters in it that
where out of bounds from the working base.
Note:
Without the USTR_FLAG_PARSE_NUM_EXACT, this error is ignored as soon
as any number is parsed.
This out of bounds includes the Ustr string "++" as well as "4A",
when parsing in a base less than 11.
Constant: USTR_TYPE_PARSE_NUM_ERR_OVERFLOW
Explanation:
This error code means that the number parsed from the Ustr string
would overflow the type it is being parsed into, this is only returned
when the USTR_FLAG_PARSE_NUM_OVERFLOW flag was passed to the parse
function.
Constant: USTR_TYPE_PARSE_NUM_ERR_NEGATIVE
Explanation:
This error code means that the number parsed from the Vstr string
starts with a ’-’ (Hyphen) character when it is supposed to be an
unsigned number.
Constant: USTR_TYPE_PARSE_NUM_ERR_BEG_ZERO
Explanation:
This error code means that the number parsed from the Vstr string
starts with a ’0’ (Digit Zero) character, when the
USTR_FLAG_PARSE_NUM_NO_BEG_ZERO flag was passed to the parse function.
Constants to pass to ustr_split*
Constant: USTR_FLAG_SPLIT_DEF
Explanation:
Default flags, this is merely 0 but can be used as live
documentation.
Constant: USTR_FLAG_SPLIT_RET_SEP
Explanation:
Return the separator along with the tokens. For example splitting
"a,b," using separator "," will return the tokens "a," and "b," whereas
without this flag only "a" and "b" would be returned.
.br Constant: USTR_FLAG_SPLIT_RET_NON
Explanation:
Return empty tokens. For example: splitting "a,,b" with separator ","
will return the tokens {"a" "" "b"}.
Constant: USTR_FLAG_SPLIT_KEEP_CONFIG
Explanation:
Force the returned Ustr’s to have same configuration parameters as
the Ustr string that is being split.
Misc constants to use in code
Constant: USTR_NULL
Explanation:
This macro is merely 0 cast to (struct Ustr *), and can be used
anywhere NULL would be but "returns" the correct type.
Constant: USTR_POOL_NULL
Explanation:
This macro is merely 0 cast to (struct Ustr_pool *), and can be used
anywhere NULL would be but "returns" the correct type.
Constant: USTR_TRUE
Explanation:
This macro is 1, but shows the intent that a boolean value is
expected and not a number.
Constant: USTR_FALSE
Explanation:
This macro is 0, but shows the intent that a boolean value is
expected and not a number.
Constants passed to ustr_cntl_opt()
Constant: USTR_CNTL_OPT_GET_REF_BYTES
Parameter[1]: Number of bytes for default reference count in Ustr
Type[1]: size_t *
Explanation:
This option will get the default number of bytes used for a reference
count when creating Ustr’s.
Constant: USTR_CNTL_OPT_SET_REF_BYTES
Parameter[1]: Number of bytes for default reference count in Ustr
Type[1]: size_t
Explanation:
This option will set the default number of bytes used for a reference
count when creating Ustr’s.
Note:
For a single instance, the ustr_dupx_*() functions can be used.
Constant: USTR_CNTL_OPT_GET_HAS_SIZE
Parameter[1]: Default flag for whether to include an explicit size in a
Ustr
Type[1]: int *
Explanation:
This option will get the default flag for whether to store an
explicit size in created Ustr’s.
Constant: USTR_CNTL_OPT_SET_HAS_SIZE
Parameter[1]: Default flag for whether to include an explicit size in a
Ustr
Type[1]: int
Explanation:
This option will set the default flag for whether to store an
explicit size in created Ustr’s.
Note:
For a single instance, the ustr_dupx_*() functions can be used.
Constant: USTR_CNTL_OPT_GET_EXACT_BYTES
Parameter[1]: Default flag for whether to exactly allocate memory
Type[1]: int *
Explanation:
This option will get the default flag for whether to exactly allocate
memory when a Ustr needs to be resized.
Constant: USTR_CNTL_OPT_SET_EXACT_BYTES
Parameter[1]: Default flag for whether to exactly allocate memory
Type[1]: int
Explanation:
This option will set the default flag for whether to exactly allocate
memory when a Ustr needs to be resized.
Note:
For a single instance, the ustr_dupx_*() functions can be used.
Constant: USTR_CNTL_OPT_GET_MEM
Parameter[1]: Pointer to colleciton of function pointers for system
allocation
Type[1]: struct Ustr_cntl_mem *
Explanation:
This option will get the "system" allocation functions (malloc,
realloc, free) for allocated Ustr’s.
Note:
As you would expect the default values are: malloc, realloc, free.
Constant: USTR_CNTL_OPT_SET_MEM
Parameter[1]: Pointer to colleciton of function pointers for system
allocation
Type[1]: const struct Ustr_cntl_mem *
Explanation:
This option will set the "system" allocation functions (malloc,
realloc, free) for allocated Ustr’s.
Note:
If this option is set after a Ustr has been created, then when
freeing or reallocating the existing Ustr the given functions will be
used. So they must either be compatible with the default or you must
ensure that nothing is allocated before they are set.
Constant: USTR_CNTL_OPT_GET_MC_M_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int *
Explanation:
This option will get the flag for whether to "scrub" data allocated
via. malloc check.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_SET_MC_M_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int
Explanation:
This option will set the flag for whether to "scrub" data allocated
via. malloc check.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_GET_MC_F_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int *
Explanation:
This option will get the flag for whether to "scrub" data freed via.
malloc check.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_SET_MC_F_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int
Explanation:
This option will set the flag for whether to "scrub" data freed via.
malloc check.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_GET_MC_R_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int *
Explanation:
This option will get the flag for whether to "scrub" data reallocated
via. malloc check. This is done by turning all reallocations into a
malloc() and free(), and so is even more costly than normal scrubbing.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_SET_MC_R_SCRUB
Parameter[1]: Flag for whether to include an explicit size in a Ustr
Type[1]: int
Explanation:
This option will set the flag for whether to "scrub" data reallocated
via. malloc check. This is done by turning all reallocations into a
malloc() and free(), and so is even more costly than normal scrubbing.
Note:
Malloc check has to be enabled for this to mean anything, Ie.
USTR_CNTL_MALLOC_LVL() must be positive.
Constant: USTR_CNTL_OPT_GET_FMT
Parameter[1]: Pointer to colleciton of function pointers for system
formating
Type[1]: struct Ustr_cntl_fmt *
Explanation:
This option will get the system formatting functions (vsnprintf) for
Ustr’s.
There are two functions, the first is always called and the second is
likely called (always with the exact same arguments) if the length
passed to the first call was not big enough.
Note:
As you would expect the default values are: vsnprintf and vsnprintf
Constant: USTR_CNTL_OPT_SET_FMT
Parameter[1]: Pointer to colleciton of function pointers for system
formatting
Type[1]: const struct Ustr_cntl_fmt *
Explanation:
This option will set the system formatting functions (vsnprintf) for
Ustr’s.
Constants passed to ustr_pool_ll_cntl()
Constant: USTR_POOL_LL_CNTL_GET_FREE_CMP
Parameter[1]: Number of pointers to compare to in the pool
Type[1]: unsigned int *
Explanation:
This option will get the number of comparisons done on a pool free
operation.
Constant: USTR_POOL_LL_CNTL_SET_FREE_CMP
Parameter[1]: Number of pointers to compare to in the pool
Type[1]: unsigned int
Explanation:
This option will set the number of comparisons done on a pool free
operation.
Note:
The default is a small non-zero value, as it’s significantly common
to have very short lived ustr’s ... however this doesn’t mean that you
can’t forget to take references even with pool allocated ustrs.
Constant: USTR_POOL_LL_CNTL_GET_REALLOC
Parameter[1]: Flag for if we should call realloc()
Type[1]: int *
Explanation:
This option will get the flag for if we call realloc() to make data
bigger, or revert to just allocating anew each time.
Constant: USTR_POOL_LL_CNTL_SET_REALLOC
Parameter[1]: Flag for if we should call realloc()
Type[1]: int
Explanation:
This option will set the flag for if we call realloc() to make data
bigger, or revert to just allocating anew each time.
Note:
As with USTR_POOL_LL_CNTL_SET_FREE_CMP this option means you can’t
assume that pool allocated data is never freed until ustr_pool_free()
is called, and again it is due to there being significant speed
improvements for not making that assumption. Instead of disabling this
option, just take areference (which will also make sure the ustr isn’t
modified behind your back).
SEE ALSO
ustr(3)