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Noteworthy changes in release a.b
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* The knet networking code has been removed. It only supported the http
and ftp protocols, and a better and safer alternative using libcurl
has been available since release 1.3. If you need access to ftp:// and
http:// URLs, HTSlib should be built with libcurl support. (#1200)
* The old htslib/knetfile.h interfaces have been marked as deprecated. Any
code still using them should be updated to use hFILE instead. (#1200)
Noteworthy changes in release 1.11 (22nd September 2020)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Features and Updates
--------------------
* Support added for remote reference files. fai_path() can take a remote
reference file and will return the corresponding index file. Remote indexes
can be handled by refs_load_fai(). UR tags in @SQ lines can now be set to
remote URIs. (#1017)
* Added tabix --separate-regions option, which adds header comment lines
separating different regions' output records when multiple target regions
are supplied on the command line. (#1108)
* Added tabix --cache option to set a BGZF block cache size. Most beneficial
when the -R option is used and the same blocks need to be re-read multiple
times. (#1053)
* Improved error checking in tabix and added a --verbosity option so
it is possible to change the amount of logging when it runs. (#1040)
* A note about the maximum chromosome length usable with TBI indexes has been
added to the tabix manual page. Thanks to John Marshall. (#1070)
* New method vcf_open_mode() changes the opening mode of a variant file
based on its file extension. Similar to sam_open_mode(). (#1096)
* The VCF parser has been made faster and easier to maintain. (#1057)
* bcf_record_check() has been made faster, giving a 15% speed increase when
reading an uncompressed BCF file. (#1130)
* The VCF parser now recognises the "<NON_REF>" symbolic allele produced
by GATK. (#1045)
* Support has been added for simultaneous reading of unindexed VCF/BCF files
when using the synced_bcf_reader interface. Input files must have the
chromosomes in the same order as each other and be consistent with the order
of sequences in the header. (#1089)
* The VCF and BCF readers will now attempt to fix up invalid INFO/END tags
where the stored END value is less than POS, resulting in an apparently
negative record length. Such files have been generated by programs which
used END incorrectly, and by broken lift-over processes that failed to
update any END tags present. (#1021; fixed samtools/bcftools#1154)
* The htsFile interface can now detect the crypt4gh encrypted format (see
https://samtools.github.io/hts-specs/crypt4gh.pdf). If HTSlib is
built with external plug-in support, and the hfile_crypt4gh plug-in is
present, the file will be passed to it for decryption. The plug-in
can be obtained from https://github.com/samtools/htslib-crypt4gh. (#1046)
* hts_srand48() now seeds the same POSIX-standard sequences of pseudo-random
numbers regardless of platform, including on OpenBSD where plain srand48()
produces a different cryptographically-strong non-deterministic sequence.
Thanks to John Marshall. (#1002)
* Iterators now work with 64 bit positions. (#1018)
* Improved the speed of range queries when using BAI indexes by
making better use of the linear index data included in the file.
The best improvement is on low-coverage data. (#1031)
* Alignments which consume no reference bases are now considered to have
length 1. This would make such alignments cover 1 reference position in
the same manner as alignments that are unmapped or have no CIGAR strings.
These alignments can now be returned by iterator-based queries. Thanks
to John Marshall. (#1063; fixed samtools/samtools#1240, see also
samtools/hts-specs#521).
* A bam_set_seqi() function to modify a single base in the BAM structure
has been added. This is a companion function to bam_seqi(). (#1022)
* Writing SAM format is around 30% faster. (#1035)
* Added sam_format_aux1() which converts a BAM aux tag to a SAM format string.
(#1134)
* bam_aux_update_str() no longer requires NUL-terminated strings. It
is also now possible to create tags containing part of a longer string.
(#1088)
* It is now possible to use external plug-ins in language bindings that
dynamically load HTSlib. Note that a side-effect of this change is that
some plug-ins now link against libhts.so, which means that they have to be
able to find the shared library when they are started up. Thanks to
John Marshall. (#1072)
* bgzf_close(), and therefore hts_close(), will now return non-zero when
closing a BGZF handle on which errors have been detected. (Part of #1117)
* Added a special case to the kt_fisher_exact() test for when the table
probability is too small to be represented in a double. This fixes a
bug where it would, for some inputs, fail to correctly determine which
side of the distribution the table was on resulting in swapped p-values
being returned for the left- and right-tailed tests. The two-tailed
test value was not affected by this problem. (#1126)
* Improved error diagnostics in the CRAM decoder (#1042), BGZF (#1049),
the VCF and BCF readers (#1059), and the SAM parser (#1073).
* ks_resize() now allocates 1.5 times the requested size when it needs
to expand a kstring instead of rounding up to the next power of two.
This has been done mainly to make the inlined function smaller, but it
also reduces the overhead of storing data in kstrings at the expense of
possibly needing a few more reallocations. (#1129)
CRAM improvements
-----------------
* Delay CRAM crc32 checks until the data actually needs to be used. With
other changes this leads to a 20x speed up in indexing and other sub-query
based actions. (#988)
* CRAM now handles the transition from mapped to unmapped data in a better
way, improving compression of the unmapped data. (#961)
* CRAM can now use libdeflate. (#961)
* Fixed bug in MD tag generation with "b" read feature codes, causing the
numbers in the tag to be too large. Note that HTSlib never uses this
feature code so it is unlikely that this bug would be seen on real data.
The problem was found when testing against hand-crafted CRAM files. (#1086)
* Fixed a regression where the CRAM multi-region iterator became much less
efficient when using threads. It now works more like the single iterator
and does not preemptively decode the next container unless it will be used.
(#1061)
* Set CRAM default quality in lossy quality modes. If lossy quality is enabled
and 'B', 'q' or 'Q' features are used, CRAM starts off with QUAL being all 255
(as per BAM spec and "*" quality) and then modifies individual qualities as
dictated by the specific features.
However that then produces ASCII quality " " (space, q=-1) for the unmodified
bases. Instead ASCII quality "?" (q=30) is used, as per HTSJDK. Quality 255
is still used for sequences with no modifications at all. (#1094)
Build changes
-------------
These are compiler, configuration and makefile based changes.
* `make all` now also builds htslib_static.mk and htslib-uninstalled.pc.
Thanks to John Marshall. (#1011)
* Various cppcheck-1.90 warnings have been fixed. (#995, #1011)
* HTSlib now prefers its own headers when being compiled, fixing build
failures on machines that already had a system-installed HTSlib. Thanks to
John Marshall. (#1078; fixed #347)
* Define HTSLIB_EXPORT without using a helper macro to reduce the length of
compiler diagnostics that mention exported functions. Thanks to
John Marshall. (#1029)
* Fix dirty default build by including latest pkg.m4 instead of using
aclocal.m4. Thanks to Damien Zammit. (#1091)
* Struct tags have been added to htslib/*.h public typedefs. This makes it
possible to forward declare htsFile without including htslib/hts.h. Thanks
to Lucas Czech and John Marshall. (#1115; fixed #1106)
* Fixed compiler warnings emitted by the latest gcc and clang releases
when compiling HTSlib, along with some -Wextra warnings in the public
include files. Thanks to John Marshall. (#1066, #1063, #1083)
Bug fixes
---------
* Fixed hfile_libcurl breakage when using libcurl 7.69.1 or later. Thanks to
John Marshall for tracking down the exact libcurl change that caused the
incompatibility. (#1105; fixed samtools/samtools#1254 and
samtools/samtools#1284)
* Fixed overflows kroundup32() and kroundup_size_t() which caused them to
return zero when rounding up values where the most significant bit was
set. When this happens they now return the highest value that can
be stored (#1044). All of the kroundup macro definitions have also been
gathered together into a unified implementation (#1051).
* Fixed missing return parameter value in idx_test_and_fetch(). Thanks to
Lilian Janin. (#1014)
* Fixed crashes due to inconsistent selection between BGZF and plain (hFILE)
interfaces when reading files. [fuzz] (#1019)
* Added and/or fixed byte swapping code for big-endian platforms. Thanks
to Jun Aruga, John Marshall, Michael R Crusoe and Gianfranco Costamagna
for their help. (#1023; fixed #119 and #355)
* Fixed a problem with multi-threaded on-the-fly indexes which would
occasionally write virtual offsets pointing at the end of a BGZF block.
Attempting to read from such an offset caused EOF to be incorrectly
reported. These offsets are now handled correctly, and the indexer
has been updated to avoid generating them. (#1028; fixed
samtools/samtools#1197)
* In sam_hdr_create(), free newly allocated SN strings when encountering an
error. [fuzz] (#1034)
* Prevent double free in case of idx_test_and_fetch() failure. Thanks to
@fanwayne for the bug report. (#1047; fixed #1033)
* In the header, link a new PG line only to valid chains. Prevents an
explosive growth of PG lines on headers where PG lines are already present
but not linked together correctly. (#1062; fixed samtools/samtools#1235)
* Also in the header, when calling sam_hdr_update_line(), update target arrays
only when the name or length is changed. (#1007)
* Fixed buffer overflows in CRAM MD5 calculation triggered by
files with invalid compression headers, or files with embedded
references that were one byte too short. [fuzz] (#1024, #1068)
* Fix mpileup regression between 1.9 and 1.10 where overlap detection
was incorrectly skipped on reads where RNEXT, PNEXT and TLEN were
set to the "unavailable" values ("*", 0, 0 in SAM). (#1097)
* kputs() now checks for null pointer in source string. [fuzz] (#1087)
* Fix potential bcf_update_alleles() crash on 0 alleles. Thanks to
John Marshall. (#994)
* Added bcf_unpack() calls to some bcf_update functions to fix a bug
where updates made after a call to bcf_dup() could be lost. (#1032;
fixed #1030)
* Error message typo "Number=R" instead of "Number=G" fixed in
bcf_remove_allele_set(). Thanks to Ilya Vorontsov. (#1100)
* Fixed crashes that could occur in BCF files that use IDX= header annotations
to create a sparse set of CHROM, FILTER or FORMAT indexes, and
include records that use one of the missing index values. [fuzz] (#1092)
* Fixed potential integer overflows in the VCF parser and ensured that
the total length of FORMAT fields cannot go over 2Gbytes. [fuzz] (#1044,
#1104)
* Download index files atomically in idx_test_and_fetch(). This prevents
corruption when running parallel jobs on S3 files. Thanks to John Marshall.
(#1112; samtools/samtools#1242).
* The pileup constructor callback is now given the copy of the bam1_t struct
made by pileup instead of the original one passed to bam_plp_push(). This
makes it the same as the one passed to the destructor and ensures that
cached data, for example the location of an aux tag, will remain valid.
(#1127)
* Fixed possible error in code_sort() on negative CRAM Huffman code
length. (#1008)
* Fixed possible undefined shift in cram_byte_array_stop_decode_init(). (#1009)
* Fixed a bug where range queries to the end of a given reference
would return incorrect results on CRAM files. (#1016;
fixed samtools/samtools#1173)
* Fixed an integer overflow in cram_read_slice(). [fuzz] (#1026)
* Fixed a memory leak on failure in cram_decode_slice(). [fuzz] (#1054)
* Fixed a regression which caused cram_transcode_rg() to fail, resulting
in a crash in "samtools cat" on CRAM files. (#1093;
fixed samtools/samtools#1276)
* Fixed an undersized string reallocation in the threaded SAM reader which
caused it to crash when reading SAM files with very long lines. Numerous
memory allocation checks have also been added. (#1117)
Noteworthy changes in release 1.10.2 (19th December 2019)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This is a release fix that corrects minor inconsistencies discovered in
previous deliverables.
Noteworthy changes in release 1.10.1 (17th December 2019)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The support for 64-bit coordinates in VCF brought problems for files
not conforming to VCF/BCF specification. While previous versions would
make out-of-range values silently overflow creating nonsense values
but parseable file, the version 1.10 would silently create an invalid BCF.
Noteworthy changes in release 1.10 (6th December 2019)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Brief summary
-------------
There are many changes in this release, so the executive summary is:
* Addition of support for references longer than 2Gb (NB: SAM and VCF
formats only, not their binary counterparts). This may need changes
in code using HTSlib. See README.large_positions.md for more information.
* Added a SAM header API.
* Major speed up to SAM reading and writing. This also now supports
multi-threading.
* We can now auto-index on-the-fly while writing a file. This also
includes to bgzipped SAM.gz.
* Overhaul of the S3 interface, which now supports version 4
signatures. This also makes writing to S3 work.
These also required some ABI changes. See below for full details.
Features / updates
------------------
* A new SAM/BAM/CRAM header API has been added to HTSlib, allowing header
data to be updated without having to parse or rewrite large parts of the
header text. See htslib/sam.h for function definitions and
documentation. (#812)
The header typedef and several pre-existing functions have been renamed
to have a sam_hdr_ prefix: sam_hdr_t, sam_hdr_init(), sam_hdr_destroy(),
and sam_hdr_dup(). (The existing bam_hdr_-prefixed names are still
provided for compatibility with existing code.) (#887, thanks to
John Marshall)
* Changes to hfile_s3, which provides support for the AWS S3 API. (#839)
- hfile_s3 now uses version 4 signatures by default. Attempting to write to
an S3 bucket will also now work correctly. It is possible to force
version 2 signatures by creating environment variable HTS_S3_V2 (the exact
value does not matter, it just has to exist). Note that writing depends
on features that need version 4 signatures, so forcing version 2 will
disable writes.
- hfile_s3 will automatically retry requests where the region endpoint
was not specified correctly, either by following the 301 redirect (when
using path-style requests) or reading the 400 response (when using
virtual-hosted style requests and version 4 signatures). The first
region to try can be set by using the AWS_DEFAULT_REGION environment
variable, by setting "region" in ".aws/credentials" or by setting
"bucket_location" in ".s3cfg".
- hfile_s3 now percent-escapes the path component of s3:// URLs. For
backwards-compatibility it will ignore any paths that have already
been escaped (detected by looking for '%' followed by two hexadecimal
digits.)
- New environment variables HTS_S3_V2, HTS_S3_HOST, HTS_S3_S3CFG
and HTS_S3_PART_SIZE to force version-2 signatures, control the
S3 server hostname, the configuration file and upload chunk
sizes respectively.
* Numerous SAM format improvements.
- Bgzipped SAM files can now be indexed and queried. The library now
recognises sam.gz as a format name to ease this usage. (#718, #916)
- The SAM reader and writer now supports multi-threading via the
thread-pool. (#916)
Note that the multi-threaded SAM reader does not currently support seek
operations. Trying to do this (for example with an iterator range request)
will result in the SAM readers dropping back to single-threaded mode.
- Major speed up of SAM decoding and encoding, by around 2x. (#722)
- SAM format can now handle 64-bit coordinates and references. This
has implications for the ABI too (see below). Note BAM and CRAM
currently cannot handle references longer than 2Gb, however given
the speed and threading improvements SAM.gz is a viable workaround. (#709)
* We can now automatically build indices on-the-fly while writing
SAM, BAM, CRAM, VCF and BCF files. (Note for SAM and VCF this only
works when bgzipped.) (#718)
* HTSlib now supports the @SQ-AN header field, which lists alternative names
for reference sequences. This means given "@SQ SN:1 AN:chr1", tools like
samtools can accept requests for "1" or "chr1" equivalently. (#931)
* Zero-length files are no longer considered to be valid SAM files
(with no header and no alignments). This has been changed so that pipelines
such as `somecmd | samtools ...` with `somecmd` aborting before outputting
anything will now propagate the error to the second command. (#721, thanks
to John Marshall; #261 reported by Adrian Tan)
* Added support for use of non-standard index names by pasting the
data filename and index filename with ##idx##. For example
"/path1/my_data.bam##idx##/path2/my_index.csi" will open bam file
"/path1/my_data.bam" and index file "/path2/my_index.csi". (#884)
This affects hts_idx_load() and hts_open() functions.
* Improved the region parsing code to handle colons in reference
names. Strings can be disambiguated by the use of braces, so for
example when reference sequences called "chr1" and "chr1:100-200"
are both present, the regions "{chr1}:100-200" and "{chr1:100-200}"
unambiguously indicate which reference is being used. (#708)
A new function hts_parse_region() has been added along with
specialisations for sam_parse_region() and fai_parse_region().
* CRAM encoding now has additional checks for MD/NM validity. If
they are incorrect, it stores the (incorrect copy) verbatim so
round-trips "work". (#792)
* Sped up decoding of CRAM by around 10% when the MD tag is being
generated. (#874)
* CRAM REF_PATH now supports %Ns (where N is a single digit)
expansion in http URLs, similar to how it already supported this
for directories. (#791)
* BGZF now permits indexing and seeking using virtual offsets in
completely uncompressed streams. (#904, thanks to Adam Novak)
* bgzip now asks for extra confirmation before decompressing files
that don't have a known compression extension (e.g. .gz). This avoids
`bgzip -d foo.bam.bai` producing a foo.bam file that is very much not
a BAM-formatted file. (#927, thanks to John Marshall)
* The htsfile utility can now copy files (including to/from URLs using
HTSlib's remote access facilities) with the --copy option, in
addition to its existing uses of identifying file formats and
displaying sequence or variant data. (#756, thanks to John Marshall)
* Added tabix --min-shift option. (#752, thanks to Garrett Stevens)
* Tabix now has an -D option to disable storing a local copy of a
remote index. (#870)
* Improved support for MSYS Windows compiler environment. (#966)
* External htslib plugins are now supported on Windows. (#966)
API additions and improvements
------------------------------
* New API functions bam_set_mempolicy() and bam_get_mempolicy() have
been added. These allow more control over the ownership of bam1_t
alignment record data; see documentation in htslib/sam.h for more
information. (#922)
* Added more HTS_RESULT_USED checks, this time for VCF I/O. (#805)
* khash can now hash kstrings. This makes it easier to hash
non-NUL-terminated strings. (#713)
* New haddextension() filename extension API function. (#788, thanks to
John Marshall)
* New hts_resize() macro, designed to replace uses of hts_expand()
and hts_expand0(). (#805)
* Added way of cleaning up unused jobs in the thread pool via the new
hts_tpool_dispatch3() function. (#830)
* New API functions hts_reglist_create() and sam_itr_regarray() are added
to create hts_reglist_t region lists from `chr:<from>-<to>` type region
specifiers. (#836)
* Ksort has been improved to facilitate library use. See KSORT_INIT2
(adds scope / namespace capabilities) and KSORT_INIT_STATIC interfaces.
(#851, thanks to John Marshall)
* New kstring functions (#879):
KS_INITIALIZE - Initializer for structure assignment
ks_initialize() - Initializer for pointed-to kstrings
ks_expand() - Increase kstring capacity by a given amount
ks_clear() - Set kstring length to zero
ks_free() - Free the underlying buffer
ks_c_str() - Returns the kstring buffer as a const char *,
or an empty string if the length is zero.
* New API functions hts_idx_load3(), sam_index_load3(), tbx_index_load3()
and bcf_index_load3() have been added. These allow control of whether
remote indexes should be cached locally, and allow the error message
printed when the index does not exist to be suppressed. (#870)
* Improved hts_detect_format() so it no longer assumes all text is
SAM unless positively identified otherwise. It also makes a stab
at detecting bzip2 format and identifying BED, FASTA and FASTQ
files. (#721, thanks to John Marshall; #200, #719 both reported by
Torsten Seemann)
* File format errors now set errno to EFTYPE (BSD, MacOS) when
available instead of ENOEXEC. (#721)
* New API function bam_set_qname (#942)
* In addition to the existing hts_version() function, which reflects the
HTSlib version being used at runtime, <htslib/hts.h> now also provides
HTS_VERSION, a preprocessor macro reflecting the HTSlib version that
a program is being compiled against. (#951, thanks to John Marshall; #794)
ABI changes
-----------
This release contains a number of things which change the Application
Binary Interface (ABI). This means code compiled against an earlier
library will require recompiling. The shared library soversion has
been bumped.
* On systems that support it, the default symbol visibility has been
changed to hidden and the only exported symbols are ones that form part
of the officially supported ABI. This is to make clear exactly which
symbols are considered parts of the library interface. It also
helps packagers who want to check compatibility between HTSlib versions.
(#946; see for example issues #311, #616, and #695)
* HTSlib now supports 64 bit reference positions. This means several
structures, function parameters, and return values have been made bigger
to allow larger values to be stored. While most code that uses
HTSlib interfaces should still build after this change, some alterations
may be needed - notably to printf() formats where the values of structure
members are being printed. (#709)
Due to file format limitations, large positions are only supported
when reading and writing SAM and VCF files.
See README.large_positions.md for more information.
* An extra field has been added to the kbitset_t struct so bitsets can
be made smaller (and later enlarged) without involving memory allocation.
(#710, thanks to John Marshall)
* A new field has been added to the bam_pileup1_t structure to keep track
of which CIGAR operator is being processed. This is used by a new
bam_plp_insertion() function which can be used to return the sequence of
any inserted bases at a given pileup location. If the alignment includes
CIGAR P operators, the returned sequence will include pads. (#699)
* The hts_itr_t and hts_itr_multi_t structures have been merged and can be
used interchangeably. Extra fields have been added to hts_itr_t to support
this. hts_itr_multi_t is now a typedef for hts_itr_t; sam_itr_multi_next()
is now an alias for sam_itr_next() and hts_itr_multi_destroy() is an alias
for hts_itr_destroy(). (#836)
* An improved regidx interface has been added. To allow this, struct
reg_t has been removed, regitr_t has been modified and various new
API functions have been added to htslib/regidx.h. While parts of
the old regidx API have been retained for backwards compatibility,
it is recommended that all code using regidx should be changed to use
the new interface. (#761)
* Elements in the hts_reglist_t structure have been reordered slightly
so that they pack together better. (#761)
* bgzf_utell() and bgzf_useek() now use type off_t instead of long for
the offset. This allows them to work correctly on files longer than
2G bytes on Windows and 32-bit Linux. (#868)
* A number of functions that used to return void now return int so that
they can report problems like memory allocation failures. Callers
should take care to check the return values from these functions. (#834)
The affected functions are:
ksort.h: ks_introsort(), ks_mergesort()
sam.h: bam_mplp_init_overlaps()
synced_bcf_reader.h: bcf_sr_regions_flush()
vcf.h: bcf_format_gt(), bcf_fmt_array(),
bcf_enc_int1(), bcf_enc_size(),
bcf_enc_vchar(), bcf_enc_vfloat(), bcf_enc_vint(),
bcf_hdr_set_version(), bcf_hrec_format()
vcfutils.h: bcf_remove_alleles()
* bcf_set_variant_type() now outputs VCF_OVERLAP for spanning
deletions (ALT=*). (#726)
* A new field (hrecs) has been added to the bam_hdr_t structure for
use by the new header API. The old sdict field is now not used and
marked as deprecated. The l_text field has been changed from uint32_t
to size_t, to allow for very large headers in SAM files. The text
and l_text fields have been left for backwards compatibility, but
should not be accessed directly in code that uses the new header API.
To access the header text, the new functions sam_hdr_length() and
sam_hdr_str() should be used instead. (#812)
* The old cigar_tab field is now marked as deprecated; use the new
bam_cigar_table[] instead. (#891, thanks to John Marshall)
* The bam1_core_t structure's l_qname and l_extranul fields have been
rearranged and enlarged; l_qname still includes the extra NULs.
(Almost all code should use bam_get_qname(), bam_get_cigar(), etc,
and has no need to use these fields directly.) HTSlib now supports
the SAM specification's full 254 QNAME length again. (#900, thanks
to John Marshall; #520)
* bcf_index_load() no longer tries the '.tbi' suffix when looking for
BCF index files (.tbi indexes are for text files, not binary BCF). (#870)
* htsFile has a new 'state' member to support SAM multi-threading. (#916)
* A new field has been added to the bam1_t structure, and others
have been rearranged to remove structure holes. (#709; #922)
Bug fixes
---------
* Several BGZF format fixes:
- Support for multi-member gzip files. (#744, thanks to Adam Novak; #742)
- Fixed error handling code for native gzip formatted files. (64c4927)
- CRCs checked when threading too (previously only when non-threaded). (#745)
- Made bgzf_useek function work with threads. (#818)
- Fixed rare threading deadlocks. (#831)
- Reading of very short files (<28 bytes) that do not contain an EOF block.
(#910)
* Fixed some thread pool deadlocks caused by race conditions. (#746, #906)
* Many additional memory allocation checks in VCF, BCF, SAM and CRAM
code. This also changes the return type of some functions. See ABI
changes above. (#920 amongst others)
* Replace some sam parsing abort() calls with proper errors.
(#721, thanks to John Marshall; #576)
* Fixed to permit SAM read names of length 252 to 254 (the maximum
specified by the SAM specification). (#900, thanks to John Marshall)
* Fixed mpileup overlap detection heuristic to work with BAMs having
long CIGARs (more than 65536 operations). (#802)
* Security fix: CIGAR strings starting with the "N" operation can no
longer cause underflow on the bam CIGAR structure. Similarly CIGAR
strings that are entirely "D" ops could leak the contents of
uninitialised variables. (#699)
* Fixed bug where alignments starting 0M could cause an invalid
memory access in sam_prob_realn(). (#699)
* Fixed out of bounds memory access in mpileup when given a reference
with binary characters (top-bit set). (#808, thanks to John Marshall)
* Fixed crash in mpileup overlap_push() function. (#882; #852 reported
by Pierre Lindenbaum)
* Fixed various potential CRAM memory leaks when recovering from
error cases.
* Fixed CRAM index queries for unmapped reads (#911; samtools/samtools#958
reported by @acorvelo)
* Fixed the combination of CRAM embedded references and multiple
slices per container. This was incorrectly setting the header
MD5sum. (No impact on default CRAM behaviour.) (b2552fd)
* Removed unwanted explicit data flushing in CRAM writing, which on
some OSes caused major slowdowns. (#883)
* Fixed inefficiencies in CRAM encoding when many small references
occur within the middle of large chromosomes. Previously it
switched into multi-ref mode, but not back out of it which caused
the read POS field to be stored poorly. (#896)
* Fixed CRAM handling of references when the order of sequences in a
supplied fasta file differs to the order of the @SQ headers. (#935)
* Fixed BAM and CRAM multi-threaded decoding when used in conjunction
with the multi-region iterator. (#830; #577, #822, #926 all reported by
Brent Pedersen)
* Removed some unaligned memory accesses in CRAM encoder and
undefined behaviour in BCF reading (#867, thanks to David Seifert)
* Repeated calling of bcf_empty() no longer crashes. (#741)
* Fixed bug where some 8 or 16-bit negative integers were stored using values
reserved by the BCF specification. These numbers are now promoted to the
next size up, so -121 to -128 are stored using at least 16 bits, and -32761
to -32768 are stored using 32 bits.
Note that while BCF files affected by this bug are technically incorrect,
it is still possible to read them. When converting to VCF format,
HTSlib (and therefore bcftools) will interpret the values as intended
and write out the correct negative numbers. (#766, thanks to John Marshall;
samtools/bcftools#874)
* Allow repeated invocations of bcf_update_info() and bcf_update_format_*()
functions. (#856, thanks to John Marshall; #813 reported by Steffen Möller)
* Memory leak removed in knetfile's kftp_parse_url() function. (#759, thanks
to David Alexander)
* Fixed various crashes found by libfuzzer (invalid data leading to
errors), mostly but not exclusively in CRAM, VCF and BCF decoding. (#805)
* Improved robustness of BAI and CSI index creation and loading. (#870; #967)
* Prevent (invalid) creation of TBI indices for BCF files.
(#837; samtools/bcftools#707)
* Better parsing of handling of remote URLs with ?param=val
components and their interaction with remote index URLs. (#790; #784
reported by Mark Ebbert)
* hts_idx_load() now checks locally for all possible index names before
attempting to download a remote index. It also checks that the remote
file it downloads is actually an index before trying to save and use
it. (#870; samtools/samtools#1045 reported by Albert Vilella)
* hts_open_format() now honours the compression field, no longer also
requiring an explicit "z" in the mode string. Also fixed a 1 byte
buffer overrun. (#880)
* Removed duplicate hts_tpool_process_flush prototype. (#816, reported by
James S Blachly)
* Deleted defunct cram_tell declaration. (66c41e2; #915 reported by
Martin Morgan)
* Fixed overly aggressive filename suffix checking in bgzip. (#927, thanks to
John Marshall; #129, reported by @hguturu)
* Tabix and bgzip --help output now goes to standard output. (#754, thanks to
John Marshall)
* Fixed bgzip index creation when using multiple threads. (#817)
* Made bgzip -b option honour -I (index filename). (#817)
* Bgzip -d no longer attempts to unlink(NULL) when decompressing stdin. (#718)
Miscellaneous other changes
---------------------------
* Integration with Google OSS fuzzing for automatic detection of
more bugs. (Thanks to Google for their assistance and the bugs it
has found.) (#796, thanks to Markus Kusano)
* aclocal.m4 now has the pkg-config macros. (6ec3b94d; #733 reported by
Thomas Hickman)
* Improved C++ compatibility of some header files. (#772; #771 reported
by @cwrussell)
* Improved strict C99 compatibility. (#860, thanks to John Marshall)
* Travis and AppVeyor improvements to aid testing. (#747; #773 thanks to
Lennard Berger; #781; #809; #804; #860; #909)
* Various minor compiler warnings fixed. (#708; #765; #846, #860, thanks to
John Marshall; #865; #966; #973)
* Various new and improved error messages.
* Documentation updates (mostly in the header files).
* Even more testing with "make check".
* Corrected many copyright dates. (#979)
* The default non-configure Makefile now uses libcurl instead of
knet, so it can support https. (#895)
Noteworthy changes in release 1.9 (18th July 2018)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* If `./configure` fails, `make` will stop working until either configure
is re-run successfully, or `make distclean` is used. This makes
configuration failures more obvious. (#711, thanks to John Marshall)
* The default SAM version has been changed to 1.6. This is in line with the
latest version specification and indicates that HTSlib supports the
CG tag used to store long CIGAR data in BAM format.
* bgzip integrity check option '--test' (#682, thanks to @sd4B75bJ, @jrayner)
* Faidx can now index fastq files as well as fasta. The fastq index adds
an extra column to the `.fai` index which gives the offset to the quality
values. New interfaces have been added to `htslib/faidx.h` to read the
fastq index and retrieve the quality values. It is possible to open
a fastq index as if fasta (only sequences will be returned), but not
the other way round. (#701)
* New API interfaces to add or update integer, float and array aux tags. (#694)
* Add `level=<number>` option to `hts_set_opt()` to allow the compression
level to be set. Setting `level=0` enables uncompressed output. (#715)
* Improved bgzip error reporting.
* Better error reporting when CRAM reference files can't be opened. (#706)
* Fixes to make tests work properly on Windows/MinGW - mainly to handle
line ending differences. (#716)
* Efficiency improvements:
- Small speed-up for CRAM indexing.
- Reduce the number of unnecessary wake-ups in the thread pool. (#703)
- Avoid some memory copies when writing data, notably for uncompressed
BGZF output. (#703)
* Bug fixes:
- Fix multi-region iterator bugs on CRAM files. (#684)
- Fixed multi-region iterator bug that caused some reads to be skipped
incorrectly when reading BAM files. (#687)
- Fixed synced_bcf_reader() bug when reading contigs multiple times. (#691,
reported by @freeseek)
- Fixed bug where bcf_hdr_set_samples() did not update the sample dictionary
when removing samples. (#692, reported by @freeseek)
- Fixed bug where the VCF record ref length was calculated incorrectly
if an INFO END tag was present. (71b00a)
- Fixed warnings found when compiling with gcc 8.1.0. (#700)
- sam_hdr_read() and sam_hdr_write() will now return an error code
if passed a NULL file pointer, instead of crashing.
- Fixed possible negative array look-up in sam_parse1() that somehow escaped
previous fuzz testing. (CVE-2018-13845, #731, reported by @fCorleone)
- Fixed bug where cram range queries could incorrectly report an error
when using multiple threads. (#734, reported by Brent Pedersen)
- Fixed very rare rANS normalisation bug that could cause an assertion
failure when writing CRAM files. (#739, reported by @carsonhh)
Noteworthy changes in release 1.8 (3rd April 2018)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* The URL to get sequences from the EBI reference server has been changed
to https://. This is because the EBI no longer serve sequences via
plain HTTP - requests to the http:// endpoint just get redirected.
HTSlib needs to be linked against libcurl to download https:// URLs,
so CRAM users who want to get references from the EBI will need to
run configure and ensure libcurl support is enabled using the
--enable-libcurl option.
* Added libdeflate as a build option for alternative faster compression and
decompression. Results vary by CPU but compression should be twice as fast
and decompression faster.
* It is now possible to set the compression level in bgzip. (#675; thanks
to Nathan Weeks).
* bgzip now gets its own manual page.
* CRAM encoding now stored MD and NM tags verbatim where the reference
contains 'N' characters, to work around ambiguities in the SAM
specification (samtools #717/762).
Also added "store_md" and "store_nm" cram-options for forcing these
tags to be stored at all locations. This is best when combined with
a subsequent decode_md=0 option while reading CRAM.
* Multiple CRAM bug fixes, including a fix to free and the subsequent reuse of
references with `-T ref.fa`. (#654; reported by Chris Saunders)
* CRAM multi-threading bugs fixed: don't try to call flush on reading;
processing of multiple range queries; problems with multi-slice containers.
* Fixed crashes caused when decoding some cramtools produced CRAM files.
* Fixed a couple of minor rANS issues with handling invalid data.
* Fixed bug where probaln_glocal() tried to allocate far more memory than
needed when the query sequence was much longer than the reference. This
caused crashes in samtools and bcftools mpileup when used on data with very
long reads. (#572, problem reported by Felix Bemm via minimap2).
* sam_prop_realn() now returns -1 (the same value as for unmapped reads)
on reads that do not include at least one 'M', 'X' or '=' CIGAR operator,
and no longer adds BQ or ZQ tags. BAQ adjustments are only made to bases
covered by these operators so there is no point in trying to align
reads that do not have them. (#572)
Noteworthy changes in release 1.7 (26th January 2018)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* BAM: HTSlib now supports BAMs which include CIGARs with more than
65535 operations as per HTS-Specs 18th November (dab57f4 and 2f915a8).
* BCF/VCF:
- Removed the need for long double in pileup calculations.
- Sped up the synced reader in some situations.
- Bug fixing: removed memory leak in bcf_copy.
* CRAM:
- Added support for HTS_IDX_START in cram iterators.
- Easier to build when lzma header files are absent.
- Bug fixing: a region query with REQUIRED_FIELDS option to
disable sequence retrieval now gives correct results.
- Bug fixing: stop queries to regions starting after the last
read on a chromosome from incorrectly reporting errors
(#651, #653; reported by Imran Haque and @egafni via pysam).
* Multi-region iterator: The new structure takes a list of regions and
iterates over all, deduplicating reads in the process, and producing a
full list of file offset intervals. This is usually much faster than
repeatedly using the old single-region iterator on a series of regions.
* Curl improvements:
- Add Bearer token support via HTS_AUTH_LOCATION env (#600).
- Use CURL_CA_BUNDLE environment variable to override the CA (#622;
thanks to Garret Kelly & David Alexander).
- Speed up (removal of excessive waiting) for both http(s) and ftp.
- Avoid repeatedly reconnecting by removal of unnecessary seeks.
- Bug fixing: double free when libcurl_open fails.
* BGZF block caching, if enabled, now performs far better (#629; reported
by Ram Yalamanchili).
* Added an hFILE layer for in-memory I/O buffers (#590; thanks to Thomas
Hickman).
* Tidied up the drand48 support (intended for systems that do not
provide this function).
Noteworthy changes in release 1.6 (28th September 2017)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Fixed bug where iterators on CRAM files did not propagate error return
values to the caller correctly. Thanks go to Chris Saunders.
* Overhauled Windows builds. Building with msys2/mingw64 now works
correctly and passes all tests.
* More improvements to logging output (thanks again to Anders Kaplan).
* Return codes from sam_read1() when reading cram have been made
consistent with those returned when reading sam/bam. Thanks to
Chris Saunders (#575).
* BGZF CRC32 checksums are now always verified.
* It's now possible to set nthreads = 1 for cram files.
* hfile_libcurl has been modified to make it thread-safe. It's also
better at handling web servers that do not honour byte range requests
when attempting to seek - it now sets errno to ESPIPE and keeps
the existing connection open so callers can revert to streaming mode
it they want to.
* hfile_s3 now recalculates access tokens if they have become stale. This
fixes a reported problem where authentication failed after a file
had been in use for more than 15 minutes.
* Fixed bug where remote index fetches would fail to notice errors when
writing files.
* bam_read1() now checks that the query sequence length derived from the
CIGAR alignment matches the sequence length in the BAM record.
Noteworthy changes in release 1.5 (21st June 2017)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Added a new logging API: hts_log(), along with hts_log_error(),
hts_log_warn() etc. convenience macros. Thanks go to Anders Kaplan
for the implementation. (#499, #543, #551)
* Added a new file I/O option "block_size" (HTS_OPT_BLOCK_SIZE) to
alter the hFILE buffer size.
* Fixed various bugs, including compilation issues samtools/bcftools#610,
samtools/bcftools#611 and robustness to corrupted data #537, #538,
#541, #546, #548, #549, #554.
Noteworthy changes in release 1.4.1 (8th May 2017)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This is primarily a security bug fix update.