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2012-04-21fix major breakage in iconv, bogus rejecting of dest charsetsRich Felker1-1/+1
2012-04-21make floatscan correctly set errno for overflow/underflowRich Felker1-4/+16
care is taken that the setting of errno correctly reflects underflow condition. scanning exact denormal values does not result in ERANGE, nor does scanning values (such as the usual string definition of FLT_MIN) which are actually less than the smallest normal number but which round to a normal result. only the decimal case is handled so far; hex float require a separate fix to come later.
2012-04-21skip leading zeros even after decimal point in floatscanRich Felker1-4/+9
in principle this should just be an optimization, but it happens to also fix a nasty bug where values like 0.00000000001 were getting caught by the early zero detection path and wrongly scanned as zero.
2012-04-21fix overread (consuming an extra byte) scanning NANRich Felker1-1/+1
bug detected by glib test suite
2012-04-21fix broken sysconf when correct value is -1Rich Felker1-1/+1
this caused glib to try to allocate >2gb for getpwnam_r, and probably numerous other problems.
2012-04-19further fixes to leading space issue (forgot the wide versions)Rich Felker2-5/+9
2012-04-19fix really bad breakage in strtol, etc.: failure to accept leading spacesRich Felker5-10/+9
2012-04-18legacy junk compatibility grab-bagRich Felker2-0/+2
- 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
2012-04-18fix typo in exponent reading code or floatsRich Felker1-1/+1
this was basically harmless, but could have resulted in misreading inputs with more than a few gigabytes worth of digits..
2012-04-17fix wide scanf's handling of input failure on %c, and simplify %[Rich Felker1-5/+6
2012-04-17fix failure to distinguish input/match failure in wide %[ scanfRich Felker2-2/+4
this also includes a related fix for vswscanf's read function, which was returning a spurious (uninitialized) character for empty strings.
2012-04-17fix over-read in %ls with non-wide scanfRich Felker1-0/+1
2012-04-17fix broken %s and %[ with no width specifier in wide scanfRich Felker1-3/+7
2012-04-17fix failure to read infinity in scanfRich Felker1-3/+4
this code worked in strtod, but not in scanf. more evidence that i should design a better interface for discarding multiple tail characters than just calling unget repeatedly...
2012-04-17fix failure of int parser to unget an initial mismatching characterRich Felker1-0/+1
2012-04-17make wide scanf %[ respect widthRich Felker1-2/+3
2012-04-17fix wide scanf to respect field width for stringsRich Felker1-4/+7
2012-04-17fix some bugs in scanf %[ handling detected while writing the wide versionRich Felker1-4/+4
2012-04-17introduce new wide scanf code and remove the last remnants of old scanfRich Felker4-524/+312
at this point, strto* and all scanf family functions are using the new unified integer and floating point parser/converter code. the wide scanf is largely a wrapper for ordinary byte-based scanf; since numbers can only contain ascii characters, only strings need to be handled specially.
2012-04-17avoid depending on POSIX symbol in code used from plain C functionsRich Felker1-1/+3
2012-04-17avoid null pointer dereference on %*p fields in scanfRich Felker1-1/+1
2012-04-17also ensure that write buffer is bounded when __stdio_write returnsRich Felker1-0/+1
assuming other code is correct, this should be a no-op, but better to be safe...
2012-04-17fix buffer overflow in vfprintf on long writes to unbuffered filesRich Felker1-1/+2
vfprintf temporarily swaps in a local buffer (for the duration of the operation) when the target stream is unbuffered; this both simplifies the implementation of functions like dprintf (they don't need their own buffers) and eliminates the pathologically bad performance of writing the formatted output with one or more write syscalls per formatting field. in cases like dprintf where we are dealing with a virgin FILE structure, everything worked correctly. however for long-lived files (like stderr), it's possible that the buffer bounds were already set for the internal zero-size buffer. on the next write, __stdio_write would pick up and use the new buffer provided by vfprintf, but the bound (wend) field was still pointing at the internal zero-size buffer's end. this in turn allowed unbounded writes to the temporary buffer.
2012-04-16fix %lf, etc. with printfRich Felker1-0/+2
the l prefix is redundant/no-op with printf, since default promotions always promote floats to double; however, it is valid, and printf was wrongly rejecting it.
2012-04-16better description for errno==0Rich Felker1-1/+1
2012-04-16implement wcstod and familyRich Felker1-0/+61
not heavily tested but these functions appear to work correctly
2012-04-16avoid hitting eof in wcstolRich Felker1-2/+3
shunget cannot unget eof status, causing wcstol to leave endptr pointing to the wrong place when scanning, for example, L"0x". cheap fix is to make the read function provide an infinite stream of bogus characters rather than eof. really this is something of a design flaw in how the shgetc system is used for strto* and wcsto*; in the long term, I believe multi-character unget should be scrapped and replaced with a function that can subtract from the f->shcnt counter.
2012-04-16use the new integer parser (FILE/shgetc based) for strtol, wcstol, etc.Rich Felker14-405/+120
2012-04-16new scanf implementation and corresponding integer parser/converterRich Felker6-30/+450
advantages over the old code: - correct results for floating point (old code was bogus) - wide/regular scanf separated so scanf does not pull in wide code - well-defined behavior on integers that overflow dest type - support for %[a-b] ranges with %[ (impl-defined by widely used) - no intermediate conversion of fmt string to wide string - cleaner, easier to share code with strto* functions - better standards conformance for corner cases the old code remains in the source tree, as the wide versions of the scanf-family functions are still using it. it will be removed when no longer needed.
2012-04-16fix buggy limiter handling in shgetcRich Felker1-4/+3
this is needed for upcoming new scanf
2012-04-16wordexp must set the we_offs entries of we_wordv to null pointersRich Felker1-0/+4
2012-04-16fix crash in wordfree if we_offs is not initialized by the callerRich Felker1-0/+2
I'm not sure if it's legal for wordexp to modify this field, but this is the only easy/straightforward fix, and applications should not care. if it's an issue, i can work out a different (but more complex) solution later.
2012-04-16fix broken shgetc limiter logic (wasn't working)Rich Felker2-2/+5
2012-04-16floatscan: fix incorrect count of leading nonzero digitsRich Felker1-1/+1
this off-by-one error was causing values with just one digit past the decimal point to be treated by the integer case. in many cases it would yield the correct result, but if expressions are evaluated in excess precision, double rounding may occur.
2012-04-14fix signedness error handling invalid multibyte sequences in regexecRich Felker1-2/+2
the "< 0" test was always false due to use of an unsigned type. this resulted in infinite loops on 32-bit machines (adding -1U to a pointer is the same as adding -1) and crashes on 64-bit machines (offsetting the string pointer by 4gb-1b when an illegal sequence was hit).
2012-04-13remove invalid code from TRERich Felker1-14/+0
TRE wants to treat + and ? after a +, ?, or * as special; ? means ungreedy and + is reserved for future use. however, this is non-conformant. although redundant, these redundant characters have well-defined (no-op) meaning for POSIX ERE, and are actually _literal_ characters (which TRE is wrongly ignoring) in POSIX BRE mode. the simplest fix is to simply remove the unneeded nonstandard functionality. as a plus, this shaves off a small amount of bloat.
2012-04-13fix broken regerror (typo) and missing messageRich Felker1-2/+2
2012-04-13use fast version of the int reading code for the high-order digits tooRich Felker1-3/+13
this increases code size slightly, but it's considerably faster, especially for power-of-2 bases.
2012-04-13use macros instead of inline functions in shgetc.hRich Felker1-20/+4
at -Os optimization level, gcc refuses to inline these functions even though the inlined code would roughly the same size as the function call, and much faster. the easy solution is to make them into macros.
2012-04-13fix spurious overflows in strtoull with small basesRich Felker1-7/+3
whenever the base was small enough that more than one digit could still fit after UINTMAX_MAX/36-1 was reached, only the first would be allowed; subsequent digits would trigger spurious overflow, making it impossible to read the largest values in low bases.
2012-04-12remove magic numbers from floatscanRich Felker1-5/+5
2012-04-12optimize more integer cases in floatscan; comment the whole procedureRich Felker1-8/+27
2012-04-11revert invalid optimization in floatscanRich Felker1-2/+2
2012-04-11fix stupid typo in floatscan that caused excess rounding of some valuesRich Felker1-1/+1
2012-04-11Merge remote branch 'nsz/master'Rich Felker2-5/+6
2012-04-11optimize floatscan downscaler to skip results that won't be neededRich Felker1-2/+3
when upscaling, even the very last digit is needed in cases where the input is exact; no digits can be discarded. but when downscaling, any digits less significant than the mantissa bits are destined for the great bitbucket; the only influence they can have is their presence (being nonzero). thus, we simply throw them away early. the result is nearly a 4x performance improvement for processing huge values. the particular threshold LD_B1B_DIG+3 is not chosen sharply; it's simply a "safe" distance past the significant bits. it would be nice to replace it with a sharp bound, but i suspect performance will be comparable (within a few percent) anyway.
2012-04-11simplify/debloat radix point alignment code in floatscanRich Felker1-9/+4
now that this is the first operation, it can rely on the circular buffer contents not being wrapped when it begins. we limit the number of digits read slightly in the initial parsing loops too so that this code does not have to consider the case where it might cause the circular buffer to wrap; this is perfectly fine because KMAX is chosen as a power of two for circular-buffer purposes and is much larger than it otherwise needs to be, anyway. these changes should not affect performance at all.
2012-04-11optimize floatscan: avoid excessive upscalingRich Felker1-27/+27
upscaling by even one step too much creates 3-29 extra iterations for the next loop. this is still suboptimal since it always goes by 2^29 rather than using a smaller upscale factor when nearing the target, but performance on common, small-magnitude, few-digit values has already more than doubled with this change. more optimizations on the way...
2012-04-11fix incorrect initial count in shgetc when data is already bufferedRich Felker1-1/+1
2012-04-11fix bug parsing lone zero followed by junk, and hex float over-readingRich Felker1-6/+5
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