add std.int128 a 128 bit integer arithmetic type

.dscanner.ini

@@ -255,6 +255,7 @@ has_public_example="-etc.c.curl,\
 -std.internal.math.gammafunction,\
 -std.internal.scopebuffer,\
 -std.internal.test.dummyrange,\
+-std.int128,\
 -std.json,\
 -std.mathspecial,\
 -std.mmfile,\
@@ -403,7 +404,7 @@ redundant_attributes_check="-std.concurrency,-std.digest.md,-std.digest.ripemd,-
 style_check="+disabled"
 ;style_check="-etc.c.curl,-etc.c.odbc.sqlext,-etc.c.odbc.sqltypes,-etc.c.odbc.sqlucode,-etc.c.sqlite3,-etc.c.zlib,-std.algorithm.comparison,-std.algorithm.internal,-std.algorithm.iteration,-std.algorithm.mutation,-std.algorithm.sorting,-std.array,-std.base64,-std.bitmanip,-std.c.linux.linux,-std.compiler,-std.container.array,-std.conv,-std.datetime.date,-std.datetime.interval,-std.datetime.systime,-std.digest,-std.digest.murmurhash,-std.digest.sha,-std.encoding,-std.exception,-std.experimental.allocator,-std.experimental.allocator.building_blocks.affix_allocator,-std.experimental.allocator.building_blocks.allocator_list,-std.experimental.allocator.building_blocks.bucketizer,-std.experimental.allocator.building_blocks.fallback_allocator,-std.experimental.allocator.building_blocks.free_list,-std.experimental.allocator.building_blocks.free_tree,-std.experimental.allocator.building_blocks.null_allocator,-std.experimental.allocator.building_blocks.region,-std.experimental.allocator.building_blocks.segregator,-std.experimental.allocator.common,-std.experimental.allocator.gc_allocator,-std.experimental.allocator.mallocator,-std.experimental.allocator.mmap_allocator,-std.experimental.checkedint,-std.experimental.typecons,-std.format,-std.functional,-std.getopt,-std.internal.digest.sha_SSSE3,-std.internal.math.errorfunction,-std.internal.math.gammafunction,-std.internal.test.dummyrange,-std.internal.unicode_tables,-std.json,-std.math,-std.meta,-std.numeric,-std.parallelism,-std.path,-std.process,-std.random,-std.range,-std.range.primitives,-std.regex,-std.regex.internal.ir,-std.regex.internal.kickstart,-std.signals,-std.socket,-std.stdio,-std.string,-std.uni,-std.uri,-std.utf,-std.uuid,-std.variant,-std.zlib"
 ; Checks for undocumented public declarations
-undocumented_declaration_check="-etc.c.curl,-etc.c.odbc.sql,-etc.c.odbc.sqlext,-etc.c.odbc.sqltypes,-etc.c.odbc.sqlucode,-etc.c.sqlite3,-etc.c.zlib,-std.algorithm.sorting,-std.array,-std.ascii,-std.base64,-std.bitmanip,-std.c.linux.linux,-std.c.linux.socket,-std.c.osx.socket,-std.c.process,-std.compiler,-std.complex,-std.concurrency,-std.container,-std.container.array,-std.container.binaryheap,-std.container.dlist,-std.container.rbtree,-std.container.slist,-std.conv,-std.csv,-std.datetime,-std.datetime.date,-std.digest,-std.digest.hmac,-std.digest.md,-std.digest.murmurhash,-std.digest.ripemd,-std.digest.sha,-std.encoding,-std.exception,-std.experimental.allocator,-std.experimental.allocator.building_blocks.affix_allocator,-std.experimental.allocator.building_blocks.allocator_list,-std.experimental.allocator.building_blocks.bitmapped_block,-std.experimental.allocator.building_blocks.fallback_allocator,-std.experimental.allocator.building_blocks.free_list,-std.experimental.allocator.building_blocks.free_tree,-std.experimental.allocator.building_blocks.kernighan_ritchie,-std.experimental.allocator.building_blocks.quantizer,-std.experimental.allocator.building_blocks.region,-std.experimental.allocator.building_blocks.segregator,-std.experimental.allocator.building_blocks.stats_collector,-std.experimental.allocator.gc_allocator,-std.experimental.allocator.mallocator,-std.experimental.checkedint,-std.experimental.logger.core,-std.experimental.typecons,-std.file,-std.format,-std.functional,-std.internal.digest.sha_SSSE3,-std.internal.math.biguintcore,-std.internal.math.biguintnoasm,-std.internal.math.biguintx86,-std.internal.math.errorfunction,-std.internal.math.gammafunction,-std.internal.test.dummyrange,-std.internal.test.uda,-std.internal.windows.advapi32,-std.json,-std.math,-std.mmfile,-std.numeric,-std.outbuffer,-std.parallelism,-std.path,-std.process,-std.regex,-std.regex.internal.parser,-std.signals,-std.socket,-std.stdio,-std.string,-std.system,-std.traits,-std.uni,-std.utf,-std.variant,-std.windows.charset,-std.windows.registry,-std.windows.syserror,-std.xml,-std.zip,-std.zlib"
+undocumented_declaration_check="-etc.c.curl,-etc.c.odbc.sql,-etc.c.odbc.sqlext,-etc.c.odbc.sqltypes,-etc.c.odbc.sqlucode,-etc.c.sqlite3,-etc.c.zlib,-std.algorithm.sorting,-std.array,-std.ascii,-std.base64,-std.bitmanip,-std.c.linux.linux,-std.c.linux.socket,-std.c.osx.socket,-std.c.process,-std.compiler,-std.complex,-std.concurrency,-std.container,-std.container.array,-std.container.binaryheap,-std.container.dlist,-std.container.rbtree,-std.container.slist,-std.conv,-std.csv,-std.datetime,-std.datetime.date,-std.digest,-std.digest.hmac,-std.digest.md,-std.digest.murmurhash,-std.digest.ripemd,-std.digest.sha,-std.encoding,-std.exception,-std.experimental.allocator,-std.experimental.allocator.building_blocks.affix_allocator,-std.experimental.allocator.building_blocks.allocator_list,-std.experimental.allocator.building_blocks.bitmapped_block,-std.experimental.allocator.building_blocks.fallback_allocator,-std.experimental.allocator.building_blocks.free_list,-std.experimental.allocator.building_blocks.free_tree,-std.experimental.allocator.building_blocks.kernighan_ritchie,-std.experimental.allocator.building_blocks.quantizer,-std.experimental.allocator.building_blocks.region,-std.experimental.allocator.building_blocks.segregator,-std.experimental.allocator.building_blocks.stats_collector,-std.experimental.allocator.gc_allocator,-std.experimental.allocator.mallocator,-std.experimental.checkedint,-std.experimental.logger.core,-std.experimental.typecons,-std.file,-std.format,-std.functional,-std.internal.digest.sha_SSSE3,-std.internal.math.biguintcore,-std.internal.math.biguintnoasm,-std.internal.math.biguintx86,-std.internal.math.errorfunction,-std.internal.math.gammafunction,-std.internal.test.dummyrange,-std.internal.test.uda,-std.internal.windows.advapi32,-std.json,-std.math,-std.mmfile,-std.numeric,-std.outbuffer,-std.parallelism,-std.path,-std.process,-std.regex,-std.regex.internal.parser,-std.signals,-std.socket,-std.stdio,-std.string,-std.system,-std.traits,-std.uni,-std.utf,-std.variant,-std.windows.charset,-std.windows.registry,-std.windows.syserror,-std.xml,-std.zip,-std.zlib,-std.int128"
 ; Checks for unused labels
 unused_label_check="-std.conv,-std.internal.math.biguintx86,-std.regex.internal.thompson,-std.signals,-std.uni"
 ; Checks for unused function parameters

posix.mak

@@ -210,7 +210,7 @@ STD_PACKAGES = std $(addprefix std/,\
 
 PACKAGE_std = array ascii base64 bigint bitmanip checkedint compiler complex concurrency \
   conv csv demangle encoding exception file \
-  functional getopt json mathspecial meta mmfile numeric \
+  functional getopt int128 json mathspecial meta mmfile numeric \
   outbuffer package parallelism path process random signals socket stdint \
   stdio string sumtype system traits typecons \
   uri utf uuid variant xml zip zlib