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steipete / NSData+PSPDFFoundation.m
Created July 16, 2015 08:08
After playing around with dispatch_io (https://gist.github.com/steipete/b22babbf3014e29c19f0), I ended up with this. Upside: Uses way less memory, controllable caching, similar performance, simpler code and supports priority donation implicitly since everything's sync.
static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
NSCParameterAssert(fileURL);
NSData *shaData;
int fd = open(fileURL.path.UTF8String, O_RDONLY);
if (fd < 0) {
if (error) *error = [NSError pspdf_errorWithCode:PSPDFErrorCodeUnableToOpenPDF description:@"Failed to open file for calculating SHA256."];
return nil;
}
//
// ProgrammerAssertions.swift
// Assertions
//
// Created by Mohamed Afifi on 12/20/15.
// Copyright © 2015 mohamede1945. All rights reserved.
//
import Foundation