All Questions
11 questions
-1
votes
1
answer
235
views
Better way to represent grammar symbols in C
I'm trying to build a simple compiler for a subset of the C language in C. To achieve this, I needed to figure out a way to represent the grammar symbols. Basically, each symbol can either be a "...
- 447
2
votes
1
answer
153
views
Ask for suggestion: data type for parsing stringified fractional numbers
I am the author of a C library for parsing INI files. So far I have delegated the task of parsing values as numbers to the standard atoi() family of functions. However I think time has come that I ...
- 129
-3
votes
1
answer
339
views
Data structures or coding styles in C++ for avoiding long elseif chain when parsing?
Lately I have created some small parsers of data. My initial code structure
// more cases here ...
else if(!strcmp(X,"somekey")){
// Parse according to "somekey" behavior.
}
// ...
- 222
0
votes
2
answers
4k
views
Understanding Context Free Grammar using a simple C code
I'm trying to understand the difference between terminal and non-terminal values in a real language. I wasn't able to find enough examples on real language CFGs on the internet, most examples are ...
- 31
0
votes
0
answers
1k
views
Writing Z80 table based assembler/disassembler
I have a long-term project: DIY computer with various processors. One of my wishes not only make hardware, but software too.
So I started from assembler/disassembler for Linux, though there is a lot ...
- 101
15
votes
1
answer
7k
views
Why did GCC switch from Bison to a recursive descent parser for C++ and C?
Was there a language change that required it or some practical reason why Bison was no longer appropriate or optimal?
I saw on wikipedia that they switched, referring to the GCC 3.4 and GCC 4.1 ...
- 483
1
vote
3
answers
3k
views
Parsing mathematical expressions with two values that have parentheses and minus signs
I'm trying to parse equations like the ones below, which only have two values or the square root of a certain value, from a text file:
100+100
-100-100
-(100)+(-100)
sqrt(100)
by the minus signs, ...
- 11
2
votes
4
answers
530
views
The right place to embed a parser : Server or the Client?
I'm writing a database management software. It has a client-server architecture where the server has the piece of code to store and retrieve. The client has to get the input from the user, connects to ...
3
votes
2
answers
4k
views
Learning YACC nowadays, does it make sense? [closed]
I have a huge project that is using YACC and I would need to fix a bug in it.
I might ask someone else who wrote that to fix it but I'm interested in how compilers work. Does it make sense to learn ...
- 209
2
votes
1
answer
3k
views
Why nginx's http parser doesnt use regular expressions?
I see the http parser written by Igor Sysoev for nginx does not use regular expressions
https://github.com/joyent/http-parser
What could be the main reason for such design decision? I guess I could ...
- 161
1
vote
1
answer
187
views
How do I parse a header with two different version [ID3] avoiding code duplication?
I really hope you can give me some interesting viewpoints for my situation, because I am not satisfied with my current approach.
I am writing an MP3 parser, starting with an ID3v2 parser.
Right now ...
- 41