Simple Excel engine without any UI

Overview

Minicel

The idea is to implement a batch program that can accept a CSV file that looks like this:

A      | B
1      | 2
3      | 4
=A1+B1 | =A2+B2

And outputs:

A      | B
1      | 2
3      | 4
3      | 7

Basically a simple Excel engine without any UI.

Quick Start

The project is using nobuild build system.

$ cc -o nobuild nobuild.c
$ ./nobuild
$ ./minicel input.csv
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Comments
  • (#11) Fix remaining valgrind errors

    (#11) Fix remaining valgrind errors

    Close #11

    The issue was UB. AFAIK, the computation of the LHS and RHS in an assignment operator is unsequenced, so putting expr_buffer_at on both sides while calling move_expr_in_dir was generating UB. Judging from the valgrind output, gcc probably evaluated the LHS, followed by the argument, then the function, which caused the invalid write since the LHS became invalid. Clang might have done the reverse (RHS then LHS), so no error there.

    opened by zhiayang 1
  • Invalid reads in valgrind on `csv/stress-copy.csv`

    Invalid reads in valgrind on `csv/stress-copy.csv`

    Steps to reproduce

    Introduced in #10

    1. $ ./nobuild
    2. $ valgrind ./minicel ./csv/stress-copy.csv

    Observed

    Valgrind reporting invalid reads from Expr Buffer

    Expected

    No valgrind errors

    opened by rexim 0
  • The operator precedence is wrong. 1-2+3  should be equal to 3+1-2

    The operator precedence is wrong. 1-2+3 should be equal to 3+1-2

    the operator precedence is wrong. 1-2+3 should be equal to 3+1-2 but at the moment it is not (it is interpreted as 1-(2+3)).

    example.csv:

    =3+1-2|=1-2+3

    should have the same output, instead output is:

    2.000000|-4.000000

    opened by ManuLinares 0
Owner
Tsoding
Recreational Programming
Tsoding
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