printf
z88dk
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printf | z88dk | |
---|---|---|
16 | 6 | |
2,345 | 846 | |
- | 3.4% | |
0.0 | 9.9 | |
about 1 year ago | 7 days ago | |
C | Assembly | |
MIT License | GNU General Public License v3.0 or later |
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printf
- Nanoprintf – The smallest public printf implementation for its feature set
- Thank you senpai!
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Sprintf without C library
https://github.com/mpaland/printf i think this would work
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Nolibc: A minimal C-library replacement shipped with the kernel
Seems unlikely. My spot check of the the two vfprintf implementations shows no flow from one to the other, and shows that part of the Cosmopolitan code has an older lineage than nolibc.
The nolibc source has many reference to copyright held by "Willy Tarreau", under LGPL-2.1 OR MIT license, with a copyright date starting in 2017.
The string "Tarreau" does not exist in the Cosmopolitan library, so that's a strong negative there. Let's look closer.
The file organization is quite different. And so is the implementation. So that's another negative.
Compare the vfprintf in nolibc at https://elixir.bootlin.com/linux/v6.2-rc4/source/tools/inclu... (a 'minimal vfprintf()') with the one in cosmopolitan starting at https://github.com/jart/cosmopolitan/blob/master/libc/stdio/....
Right away we can see nolibc places many functions in the same file while Cosmopolitan uses a one-function-per-filename organization.
Cosmopolitan's fvprintf locks the file (which nolibc doesn't need to do) then calls vfprintf_unlocked which calls __fmt at https://github.com/jart/cosmopolitan/blob/master/libc/fmt/fm... , which is the actual implementation. It look very different from NOLIBC's.
Okay, so perhaps that's they way now but not at the beginning?
We can also go back to Cosmopolitan's original implementation and see how vfprintf goes through https://github.com/jart/cosmopolitan/blob/c91b3c50068224929c... to call "palandprintf", which https://github.com/jart/cosmopolitan/blob/c91b3c50068224929c... says is copyright "Marco Paland" from 2014-2019.
That's a few years older than the start of nolibc, available from https://github.com/mpaland/printf , and part of https://github.com/embeddedartistry/libc , a "libc targeted for embedded systems usage".
Thus, multiple factors seem to agree that nolibc code is not used in the Cosmopolitan library.
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How should I go about implementing printf-like function in my library?
I wrap this C implementation in a C++ Logger class and use it to "print" into a simple buffer. Then the static buffer is periodically unrolled into a transport layer using a static Logger::transmit() function in my BSP. I'm working with very little flash, so the linked implementation is essential.
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A 1 hour interview for an embedded engineering position
There are many good and tiny printf's fir embedded on GitHub. https://github.com/mpaland/printf eg Better than the bsd printf mostly
- is it safe to use printf()?
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Sprintf on STM32?
I'm sure sprintf itself is working in their library, so try to find other issues first, BUT, as a last resort you can try another lib: https://github.com/mpaland/printf/
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Would you merge with them?
looked at that account, found this one too
z88dk
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Best practice to store context for a C compiler
z88dk
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Compiler Roms?
And z88dk home page: https://github.com/z88dk/z88dk
- Z88dk v2.2 Release
- transferring code to a ti-84
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8080 or Z80 compilers
z88dk or sdcc come to mind. I've only done things with z88dk though because it was easier to setup for the msx platform. sdcc has more optimization but i think these days you can use it under z88dk also. Good luck, this is fun! :)
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Z80 (Z180 & Z80N) 32-Bit and 16-Bit IEEE floating point libraries in the Z88DK
The 32-bit library. https://github.com/z88dk/z88dk/blob/master/libsrc/_DEVELOPMENT/math/float/math32/readme.md
What are some alternatives?
nanoprintf - The smallest public printf implementation for its feature set.
devkitSMS - development kit and libraries for SEGA Master System / SEGA Game Gear / SEGA SG-1000 / SEGA SC-3000 homebrew programming using C language (and the SDCC compiler)
trice - 🟢 super fast 🚀 and tiny 🐥 embedded device 𝘾 printf-like trace ✍ code, works also inside ⚡ interrupts ⚡ and real-time PC 💻 logging (trace ID visualization 👀)
sjasmplus - Command-line cross-compiler of assembly language for Z80 CPU.
elk - A low footprint JavaScript engine for embedded systems
rgbds - Rednex Game Boy Development System - An assembly toolchain for the Nintendo Game Boy and Game Boy Color
anal-encryption-2.0
llvm-I8080 - LLVM Compiler Backend for Intel 8080 and LC-2200
vformat - A Python str.format() like formatter, based on Text.Printf
gbdk-2020 - An updated version of GBDK, C compiler, assembler, linker and set of libraries for the Nintendo Gameboy, Nintendo Entertainment System, Sega Master System, Sega Game Gear.
modorganizer - Mod manager for various PC games. Discord Server: https://discord.gg/ewUVAqyrQX if you would like to be more involved
lighthouse-of-doom - A simple text-based adventure game