JSMN
tiny-json
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JSMN
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Building a high performance JSON parser
Like how https://github.com/zserge/jsmn works. I thought it would be neat to have such as parser for https://github.com/vshymanskyy/muon
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Flattening ASTs (and Other Compiler Data Structures)
One more JSON implementation using this approach is https://github.com/zserge/jsmn.
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Show HN: WinGPT, AI Assistant for Windows 3.1
Yep! I'm using JSMN (https://github.com/zserge/jsmn), which is a streaming parser that visits each token sequentially, so there's only one copy of each JSON response in memory. I also avoid allocating new intermediate memory whenever possible; for example, to unescape backslashes in the JSON strings, I use a destructive loop that moves the non-backslash characters forward in memory, and truncates the string by moving the null terminator earlier in the string. Not something I'd imagine doing in most environments today, but as you said, it saves a bit of space at the expense of CPU time :)
void DestructivelyUnescapeStr(LPSTR lpInput) {
- A good C library to parse json data
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Lightweight data serialization/deserialization format
After reviewing several options, I’ve settled on plain old JSON. For parsing, I use https://github.com/zserge/jsmn. For serialization I use https://github.com/rdpoor/jems (disclaimer: I wrote the latter, but others use it as well).
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jemi: a compact JSON serializer for embedded systems
As mentioned here, it appears that tiny-json is a parser, not a serializer. If you're looking for parsers, I've been very happy with jsmn.
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What is the proper way to store a RFC3339 date string?
Very small, 4-5 fields but I'm still going to write in binary because I'm trying to reduce dependencies and https://github.com/zserge/jsmn looks like good fit but jsmn only does parsing which I need for parsing some Oauth json data and config.json file. I will be able to dump the state struct in a state.bin file and read it later for comparing it with system time. Not having to write in text fits well for this particular use case. Benefits: Reduced dependencies and almost cost less decoding of the state struct(which the user will never see).
- Jsmn: A minimalistic JSON parser in C
- CJSON – Ultralightweight JSON parser in ANSI C
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A tiny zero-allocation JSON serializer compatible with C89!
This is my very straight-forward implementation that came to be from the lack of JSON encoding in jsmn:
tiny-json
- jemi: a compact JSON serializer for embedded systems
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How common are 16-bit MCUs ?
A bit off topic, but tiny-json exists specifically for embedded platforms, so I wouldn't roll my own allocator just for this: https://github.com/rafagafe/tiny-json
- CJSON – Ultralightweight JSON parser in ANSI C
What are some alternatives?
cJSON - Ultralightweight JSON parser in ANSI C
json-c - https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/
embox - Modular and configurable OS for embedded applications
Jansson - C library for encoding, decoding and manipulating JSON data
lvgl - Embedded graphics library to create beautiful UIs for any MCU, MPU and display type.
RapidJSON - A fast JSON parser/generator for C++ with both SAX/DOM style API
cninja - an opinionated cmake config manager
ArduinoJson - 📟 JSON library for Arduino and embedded C++. Simple and efficient.
frozen - JSON parser and generator for C/C++ with scanf/printf like interface. Targeting embedded systems.
json - JSON for Modern C++
json-maker - C library used to code JSON objects in null-terminated strings