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Antoine PitrouWes McKinney
b83db6116dc
Antoine Pitrou authored and Wes McKinney committed 5ebab5aaceb
ARROW-25: [C++] Implement CSV reader

This includes:
- a CSV table reader written in C++
- a Python wrapper around the CSV table reader
- simple type inference for CSV values (null -> int64 -> float64 -> binary)
- generic null parsing using Pandas defaults as a baseline
  ("NA", "N/A", "NaN"...)
- some simple syntax parameters for CSV parsing

Not included:
- conversion and typing options
- performance tuning

Author: Antoine Pitrou <antoine@python.org>

Closes #2576 from pitrou/ARROW-25-csv-reader and squashes the following commits:

4ae93b2d5 <Antoine Pitrou> ARROW-25:  Implement CSV reader