Commit graph

5 commits

Author SHA1 Message Date
Elliott Hughes
7cebf835f3 Various coverage improvements.
Mostly from extra test cases, but also:

* Move the fgets size < 0 assertion into fgets.

* Use ELF aliases for strtoq/strtouq rather than duplicating code.

* Don't check uname() succeeded, since it can't fail.

Test: treehugger
Change-Id: I2e6b3b88b0a3eb16bd68be68b9bc9f40d8043291
2020-08-12 15:52:14 -07:00
Elliott Hughes
bf03c01b38 Remove bionic's internal ctype-like inlines.
Bug: http://b/144165498
Test: treehugger
Change-Id: Ifcf352525abc74850053a1a019f90c72e488b71c
2020-02-05 11:39:35 -08:00
Elliott Hughes
cb239bda65 Simplify atoi*/strto* for signed integers.
Make the cost of strto<signed> closer to the cost of strto<unsigned>
by removing an `if` from the inner loop. Previously a signed conversion
cost 10ns more than an unsigned one.

After:

  BM_inttypes_strtoimax         81 ns         81 ns    8603362
  BM_inttypes_strtoumax         78 ns         78 ns    8967174
  BM_stdlib_strtol              81 ns         81 ns    8685537
  BM_stdlib_strtoll             81 ns         81 ns    8685481
  BM_stdlib_strtoul             78 ns         78 ns    8962569
  BM_stdlib_strtoull            78 ns         78 ns    8972023

Bug: N/A
Test: ran tests, benchmarks
Change-Id: I72dd5499427b6a940bd94c4d6f727f7efe134d7e
2017-12-21 17:44:22 -08:00
Elliott Hughes
1133fecde3 Use inline ctype functions for ato*/strto* and scanf.
This also let us remove the `unsigned char` casts, since we define our
inlines to work for all values.

Before:

  Benchmark                      Time           CPU Iterations
  -------------------------------------------------------------
  BM_inttypes_strtoimax        112 ns        112 ns    6222193
  BM_inttypes_strtoumax        104 ns        104 ns    6725010
  BM_stdlib_strtol             113 ns        113 ns    6195861
  BM_stdlib_strtoll            113 ns        113 ns    6195633
  BM_stdlib_strtoul            105 ns        105 ns    6691394
  BM_stdlib_strtoull           105 ns        105 ns    6690695

  BM_stdio_scanf_d                    504 ns        503 ns    1385224
  BM_stdio_scanf_maps                1900 ns       1898 ns     369260
  BM_stdio_scanf_maps_baseline       1030 ns       1030 ns     678832
  BM_stdio_scanf_s                    433 ns        432 ns    1619086

After:

  BM_inttypes_strtoimax         91 ns         91 ns    7718194
  BM_inttypes_strtoumax         82 ns         82 ns    8508052
  BM_stdlib_strtol              92 ns         92 ns    7674694
  BM_stdlib_strtoll             91 ns         91 ns    7639228
  BM_stdlib_strtoul             83 ns         82 ns    8500304
  BM_stdlib_strtoull            82 ns         82 ns    8504929

  BM_stdio_scanf_d                    465 ns        465 ns    1507891
  BM_stdio_scanf_maps                1836 ns       1836 ns     381082
  BM_stdio_scanf_maps_baseline        846 ns        845 ns     830881
  BM_stdio_scanf_s                    419 ns        419 ns    1671979

Bug: N/A
Test: ran tests, benchmarks
Change-Id: I44681daf16c4328b060770cf11fc0633157c427f
2017-12-19 16:37:01 -08:00
Elliott Hughes
1921dce886 Refactor the ato* and strto* family.
There are no meaningful changes here, just a minimal conversion to two
C++ templates to make further changes easier.

Bug: N/A
Test: ran tests, benchmarks
Change-Id: I958fbf17a85f19dd8f17bfb4bbb9314d220daa3b
2017-12-19 13:55:54 -08:00