bors[bot]
8c2a4b43b3
Merge #19027
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19027: sys/fmt: optimize scn_u32_dec scn_u32_hex r=benpicco a=kfessel
### Contribution description
Improves the compilation result for `scn_u32_dec` `scn_u32_hex` especially on `cortex-m` reducing either stack usage and or code size.
This makes use of unsigned int overflow (slightly less better without doing that `hexn`).
See godbolt (original versions got an `o` attached, modified versions got `k`s) all functions are marked `_S_` defined to `static`
by assigning the global at end the compiled function can be changed (`deco deck hexo hexk hexkk hexn`)
this PR is `hexkk` and `deck`
### Testing procedure
run unit-test/test-fmt
```
<RIOT>/tests/unittests$ make tests-fmt
<RIOT>/tests/unittests$ make term
```
### Issues/PRs references
[godbolt](https://godbolt.org/z/MzT1zh4q1 )
Co-authored-by: Karl Fessel <karl.fessel@ovgu.de>
2023-02-17 20:09:53 +00:00
Karl Fessel
18a783d21c
sys/fmt: optimize scn_u32_dec scn_u32_hex
2023-02-17 16:20:19 +01:00
f31d5a93b5
sys/fmt: print(): use fflush(); stdio_write() vs. fwrite()
2023-02-07 22:42:43 +01:00
Benjamin Valentin
95e654f232
sys/fmt: add print_bytes_hex()
2022-11-15 22:05:42 +01:00
Marian Buschsieweke
4f9e35254a
sys/fmt: fix print() for native
2022-06-10 11:02:40 +02:00
Marian Buschsieweke
ceeb28fb69
sys/fmt: uncrustify
2022-06-03 09:10:15 +02:00
Marian Buschsieweke
68dcf27eab
sys/fmt: fix interaction with stdio
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Use fwrite instead of write to not bypass caching stdio. Other fmt's
print function are too much of a footgun to use.
2022-06-03 09:10:15 +02:00
Karl Fessel
909ffc9d34
sys/fmt: include kernel_defines.h
2022-02-12 18:30:58 +01:00
61c62c2ed6
sys/fmt: make fmt_s32_dfp() string based
2021-11-22 14:11:01 +01:00
Marian Buschsieweke
00a8a8bd83
sys/fmt_table: fix infinite loop
2021-01-21 10:03:44 +01:00
Leandro Lanzieri
25917b1986
sys/fmt/Kconfig: make module available only for testing
2020-12-02 10:14:43 +01:00
Leandro Lanzieri
3ce7dc8f1d
sys/fmt: Add module to Kconfig
2020-11-06 15:57:58 +01:00
Bas Stottelaar
b32baa0f72
sys/*: remove unused assert.h include
2020-10-22 11:29:27 +02:00
Juergen Fitschen
aeb1230266
sys/fmt: add fmt_hex_bytes size probing
2020-05-12 17:39:25 +02:00
Hauke Petersen
ab3669294b
sys/fmt: add fmt_is_number()
2019-12-05 15:39:24 +01:00
Hauke Petersen
d9229af9d9
sys/fmt: move _is_digit and _is_upper to public API
2019-12-05 14:10:49 +01:00
d6356bdc08
Merge pull request #11692 from maribu/fmt_table
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sys/fmt: Added submodule fmt_table for printing tables
2019-08-20 22:18:54 +02:00
Marian Buschsieweke
26d73116f6
sys/fmt: Added submodule fmt_table
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print_col_u32_dec() / print_col_s32_dec() can be used to print an
uint32_t / int32_t as a column of the given width
2019-08-20 14:32:49 +02:00
Benjamin Valentin
e8dc1119b8
sys: make use of ARRAY_SIZE macro
2019-08-06 19:43:54 +02:00
3b76a2c2be
fmt: fix fmt_s32_dec() and fmt_s64_dec() sign bit handling
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"val = -val" causes UB for INTMIN, thus explicitly cast to unsigned.
2019-01-16 15:23:19 +01:00
Vincent Dupont
695a94449a
fmt: add scn_u32_hex()
2018-10-03 10:44:14 +02:00
Vincent Dupont
8c5ffa0a8d
fmt: add fmt_char
2018-10-03 10:44:14 +02:00
Vincent Dupont
71455b692f
fmt: add fmt_to_lower()
2018-10-03 10:44:14 +02:00
Vincent Dupont
a542e954cf
fmt: add fmt_u16_hex()
2018-10-03 10:44:03 +02:00
Toon Stegen
3a69e0fa98
sys/fmt: remove useless assignment
2018-08-20 16:19:30 +02:00
Toon Stegen
9f90f31291
sys/fmt: add function for converting hex byte
2018-08-20 16:19:30 +02:00
1778dbde85
fmt: Add fmt_strnlen function
2018-06-14 11:57:11 +02:00
Hauke Petersen
78df885fc7
sys/fmt: use also positive scaling for s32_dfp
2018-04-06 11:58:43 +02:00
Joakim Nohlgård
9fe024b87e
fmt: Adjust stack allocated buffer, add comments
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Adjusted buffer size for u64 case to fit the largest 64 bit decimal
number, added comments on all decimal buffers to explain which number
will fit.
2018-02-07 10:21:22 +01:00
Joakim Nohlgård
5ec44c82ba
fmt: Add fmt_s64_dec, print_s64_dec
2018-02-06 11:04:42 +01:00
2d02bc0394
sys/fmt: add new byte to hex converters:
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- fmt_bytes_hex: converts an array of bytes to an array of hex bytes
- fmt_hex_bytes: convert an array of hex bytes to an array of bytes
2018-01-10 21:30:39 +01:00
Vincent Dupont
43a902b1ab
sys/fmt: fix overflow in fmt_u32_dec()
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If the value was 10 digits long it caused an overflow in the multiply loop.
The case is now tested before looping over.
2017-12-07 17:48:05 -08:00
smlng
65a230d1f1
sys,fmt: simplify fmt_s16_dfp
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- allow formating of val=12345 with fp_digits=6 as 0.012345
- use assert instead of explicit if
- remove unused pwr function
2017-09-28 15:44:35 +02:00
Joakim Nohlgård
301a5d8e70
fmt: Remove unused pwr function
2017-09-20 10:49:00 +02:00
Joakim Nohlgård
1e43bd4211
sys/fmt: Small optimizations
2017-09-06 21:29:40 +02:00
smlng
f3e8c8c82c
fmt: add signed 32 bit float point formating
2017-08-15 12:31:07 +02:00
Joakim Nohlgård
084db19107
sys/fmt: Fix unintentional pointer advancement for negative numbers in fmt_float
2017-06-21 18:28:11 +02:00
da519a3abc
sys: fmt: add fmt_float() and print_float()
2017-05-20 14:47:29 +02:00
eb5ff902fa
sys: fmt: fix fmt_lpad() documentation and (str==NULL) case
2017-03-28 16:07:30 +02:00
003b71b323
sys: fmt: add fmt_lpad()
2017-03-27 17:44:51 +02:00
Neil Jones
e3c8386d12
sys: fmt: include stdio.h for mips.
2017-02-09 12:25:52 +00:00
Martine Lenders
0cd2b746cc
fmt: add print_byte_hex() helper
2017-02-03 15:16:53 +01:00
5923f6b137
sys: fmt: add fmt_u64_dec()
2016-06-02 10:40:19 +02:00
Hauke Petersen
95d26d3b94
sys/fmt: added format for fixed floating points
2016-03-29 15:23:04 +02:00
2567feebf2
sys: fmt: fix includes
2016-02-28 22:46:28 +01:00
8c6f373b98
sys: fmt: fix converting "0" in fmt_u32_dec()
2015-12-07 16:42:39 +01:00
157f8c93ad
sys: fmt: add workaround for AVR libc's missing write()
2015-11-26 20:41:36 +01:00
f2a2656bac
sys: fmt: use standard / for division by 10, not div.h
2015-11-18 19:00:13 +01:00
39bb99e55d
sys: fmt: add write() declaration (work around broken unistd.h)
2015-10-29 19:18:24 +01:00
1293e7a8b9
sys: fmt: initial commit of simple string formatting library
2015-10-29 19:18:24 +01:00
