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* support alternate glibc name pow10 for exp10Rich Felker2012-05-011-0/+3
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* first try at writing an efficient and "correct" exp10Rich Felker2012-04-301-0/+4
| | | | | | | | | this is a nonstandard function so it's not clear what conditions it should satisfy. my intent is that it be fast and exact for positive integral exponents when the result fits in the destination type, and fast and correctly rounded for small negative integral exponents. otherwise we aim for at most 1ulp error; it seems to differ from pow by at most 1ulp and it's often 2-5 times faster than pow.
* add linux-specific unshare syscall wrapperRich Felker2012-04-291-0/+1
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* implement getusershell, etc. legacy functionsRich Felker2012-04-221-0/+3
| | | | | I actually wrote these a month ago but forgot to integrate them. ugly, probably-harmful-to-use functions, but some legacy apps want them...
* getdtablesize is not standard; move it to its correct spot in unistd.hRich Felker2012-04-221-1/+1
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* fix breakage in endian.hRich Felker2012-04-221-1/+1
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* add some ugly byte swapping cruft in endian.hRich Felker2012-04-221-0/+59
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* add getresuid and getresgid syscall wrappersRich Felker2012-04-221-0/+2
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* fix header typoRich Felker2012-04-181-1/+1
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* legacy junk compatibility grab-bagRich Felker2012-04-184-7/+34
| | | | | | - add the rest of the junk traditionally in sys/param.h - add prototypes for some nonstandard functions - add _GNU_SOURCE to their source files so the compiler can check proto
* fix incorrect macro name for MATH_ERREXCEPT in math.hRich Felker2012-04-181-1/+1
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* move F_DUPFD_CLOEXEC out of bitsRich Felker2012-04-151-0/+2
| | | | | | fcntl values 1024 and up are universal, arch-independent. later I'll add some of the other linux-specific ones for notify, leases, pipe size, etc. here too.
* rename __sa_restorer to sa_restorer in struct sigactionRich Felker2012-04-131-1/+1
| | | | | | | | | this is legal since sa_* is in the reserved namespace for signal.h, per posix. note that the sa_restorer field is not used anywhere, so programs that are trying to use it may still break, but at least they'll compile. if it turns out such programs actually need to be able to set their own sa_restorer to function properly, i'll add the necessary code to sigaction.c later.
* fix alloca issue in stdlib.h tooRich Felker2012-04-091-1/+1
| | | | I forgot _GNU_SOURCE also has it declared here...
* alloca cannot be a function. #define it to the gcc builtin if possibleRich Felker2012-04-091-0/+4
| | | | | | | | gcc makes this mapping by default anyway, but it will be disabled by -fno-builtin (and presumably by -std=c99 or similar). for the main program the error will be reported by the linker, and the issue can easily be fixed, but for dynamic-loaded so files, the error cannot be detected until dlopen time, at which point it has become very obscure.
* remove useless (at best, harmful) feature test checks in aio.hRich Felker2012-04-031-5/+0
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* optimize signbit macroRich Felker2012-03-301-2/+2
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* make math.h more c++-friendlyRich Felker2012-03-301-2/+5
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* simplify creal and cimag macrosRich Felker2012-03-221-8/+8
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* add creal/cimag macros in complex.h (and use them in the functions defs)Rich Felker2012-03-221-0/+11
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* tgmath.h: suppress any existing macro definitions before defining macrosRich Felker2012-03-221-0/+63
| | | | | this is necessary so that we can freely add macro versions of some of the math/complex functions without worrying about breaking tgmath.
* fix DECIMAL_DIG definitionsRich Felker2012-03-211-2/+0
| | | | | | | | | | | | | DECIMAL_DIG is not the same as LDBL_DIG type_DIG is the maximimum number of decimal digits that can survive a round trip from decimal to type and back to decimal. DECIMAL_DIG is the minimum number of decimal digits required in order for any floating point type to survive the round trip to decimal and back, and it is generally larger than LDBL_DIG. since the exact formula is non-trivial, and defining it larger than necessary may be legal but wasteful, just define the right value in bits/float.h.
* initial, very primitive strfmonRich Felker2012-03-211-0/+21
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* limits.h: support gcc's -funsigned-charRich Felker2012-03-201-2/+10
| | | | | some software apparently uses this and breaks with musl due to mismatching definitions...
* move nonstandard gamma() etc. to _GNU_SOURCE onlyRich Felker2012-03-171-4/+4
| | | | | it's not even provided in the library at the moment, but could easily be provided with weak aliases if desired.
* c++ seems to want some casts in the float representation-access macrosRich Felker2012-03-171-2/+2
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* in math.h make lgamma_r and non-double bessel _GNU_SOURCE onlynsz2012-03-151-20/+18
| | | | long double and float bessel functions are no longer xsi extensions
* efficient sincos based on sin and cosnsz2012-03-151-0/+4
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* first commit of the new libm!Rich Felker2012-03-133-9/+354
| | | | | | | | | | | | | | | | thanks to the hard work of Szabolcs Nagy (nsz), identifying the best (from correctness and license standpoint) implementations from freebsd and openbsd and cleaning them up! musl should now fully support c99 float and long double math functions, and has near-complete complex math support. tgmath should also work (fully on gcc-compatible compilers, and mostly on any c99 compiler). based largely on commit 0376d44a890fea261506f1fc63833e7a686dca19 from nsz's libm git repo, with some additions (dummy versions of a few missing long double complex functions, etc.) by me. various cleanups still need to be made, including re-adding (if they're correct) some asm functions that were dropped.
* fix nan/infinity macros in math.h, etc.Rich Felker2012-03-021-6/+8
| | | | | | | | | | | the previous version not only failed to work in c++, but also failed to produce constant expressions, making the macros useless as initializers for objects of static storage duration. gcc 3.3 and later have builtins for these, which sadly seem to be the most "portable" solution. the alternative definitions produce exceptions (for NAN) and compiler warnings (for INFINITY) on newer versions of gcc.
* typo in math.h c version checkRich Felker2012-03-021-1/+1
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* make math.h compatibe with c89Rich Felker2012-03-021-1/+5
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* add all missing wchar functions except floating point parsersRich Felker2012-03-011-0/+15
| | | | | these are mostly untested and adapted directly from corresponding byte string functions and similar.
* add memory.h, bogus legacy alias for string.hRich Felker2012-03-011-0/+1
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* use c++-friendly initializers for pthread initializer definitionsRich Felker2012-02-291-3/+3
| | | | these will also avoid obnoxious warnings with gcc -Wbraces.
* add <syscall.h> as an alias for <sys/syscall.h>Rich Felker2012-02-291-0/+1
| | | | apparently some broken stuff (libstdc++) needs this.
* replace prototype for basename in string.h with non-prototype declarationRich Felker2012-02-241-1/+1
| | | | | | | | GNU programs may expect the GNU version of basename, which has a different prototype (argument is const-qualified) and prototype it themselves too. of course if they're expecting the GNU behavior for the function, they'll still run into problems, but at least this eliminates some compile-time failures.
* add get_current_dir_name functionRich Felker2012-02-171-0/+1
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* add float_t and double_t to math.hRich Felker2012-02-151-0/+2
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* replace bad cancellation cleanup abi with a sane oneRich Felker2012-02-091-16/+9
| | | | | | | | | | | | | | | | | | | | | | the old abi was intended to duplicate glibc's abi at the expense of being ugly and slow, but it turns out glib was not even using that abi except on non-gcc-compatible compilers (which it doesn't even support) and was instead using an exceptions-in-c/unwind-based approach whose abi we could not duplicate anyway without nasty dwarf2/unwind integration. the new abi is copied from a very old glibc abi, which seems to still be supported/present in current glibc. it avoids all unwinding, whether by sjlj or exceptions, and merely maintains a linked list of cleanup functions to be called from the context of pthread_exit. i've made some care to ensure that longjmp out of a cleanup function should work, even though it is not required to. this change breaks abi compatibility with programs which were using pthread cancellation, which is unfortunate, but that's why i'm making the change now rather than later. considering that most pthread features have not been usable until recently anyway, i don't see it as a major issue at this point.
* fix typo in inotify.hRich Felker2012-02-071-1/+1
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* declare basename in string.h when _GNU_SOURCE is definedRich Felker2012-02-071-0/+1
| | | | | | note that it still will have the standards-conformant behavior, not the GNU behavior. but at least this prevents broken code from ending up with truncated pointers due to implicit declarations...
* revert hacks for types of stdint.h integer constant macrosRich Felker2012-02-071-4/+4
| | | | | | | | | | | | | per 7.18.4: Each invocation of one of these macros shall expand to an integer constant expression suitable for use in #if preprocessing directives. The type of the expression shall have the same type as would an expression of the corresponding type converted according to the integer promotions. The value of the expression shall be that of the argument. the key phrase is "converted according to the integer promotions". thus there is no intent or allowance that the expression have smaller-than-int types.
* more locale_t interfaces (string stuff) and header updatesRich Felker2012-02-063-0/+15
| | | | | | this should be everything except for some functions where the non-_l version isn't even implemented yet (mainly some non-ISO-C wcs* functions).
* fix some omissions and mistakes in locale_t interface definitionsRich Felker2012-02-061-0/+24
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* add more of the locale_t interfaces, all dummied out to ignore the localeRich Felker2012-02-061-0/+5
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* add deprecated (removed from posix) [efg]cvt() functionsRich Felker2012-02-061-0/+3
| | | | | these have not been heavily tested, but they should work as described in the old standards. probably broken for non-finite values...
* apparently gnu caddr_t is supposed to be char *, not unsigned longRich Felker2012-02-011-1/+1
| | | | this type should never be used anyway, but some old junk uses it..
* fix utmp.h mess, try 2Rich Felker2012-02-011-1/+1
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* fix previous utmp.h junk commitRich Felker2012-01-311-1/+1
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