readfile
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4967f73ca1
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@ -30,4 +30,7 @@ template<class Container>
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bool scan(const std::string& path, std::insert_iterator<Container> it, bool prefixdir = false, fileNameFilter fnf = fileNameFilter(nullptr));
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bool scan(const std::string& path, fileCallback clb, bool prefixdir = false, fileNameFilter fnf = fileNameFilter(nullptr));
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bool readFile(const std::string& name, std::ostream& output, unsigned int maxsize = 0); //reads file name and writes it line for line into output, it stops at maxsize (it might be a bit more, its not a hard limit - see it more as a hint), if maxsize is 0 it reads unlimited
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bool readFile(int fd, std::ostream& output, unsigned int maxsize = 0);
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}
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@ -3,6 +3,11 @@
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#include <dirent.h>
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#include <list>
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#include <set>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include "util.h"
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void mrbesen::files::parent(const std::string& child, std::string& out) {
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@ -78,3 +83,28 @@ bool mrbesen::files::scan(const std::string& path, fileCallback clb, bool prefix
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return true;
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}
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bool mrbesen::files::readFile(const std::string& name, std::ostream& output, unsigned int maxsize) {
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int fd = open(name.c_str(), O_RDONLY);
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bool ret = readFile(fd, output, maxsize);
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close(fd);
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return ret;
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}
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bool mrbesen::files::readFile(int fd, std::ostream& output, unsigned int maxsize) {
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if(fd < 0) return false;
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const int BUFFERSIZE = 1024;
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ssize_t readc;
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uint32_t readbytes = 0;
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do {
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char b[BUFFERSIZE];
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readc = read(fd, b, BUFFERSIZE);
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if(readc == -1) return false; //error
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output << std::string(b, readc);
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readbytes += readc;
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} while(readc == BUFFERSIZE && (readbytes < maxsize || maxsize == 0));
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return true;
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}
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@ -5,6 +5,12 @@
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#include <list>
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#include <set>
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#include <string>
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#include <sstream>
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#include <cstring>
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#include <unistd.h>
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#include <fcntl.h>
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using namespace mrbesen;
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@ -121,3 +127,29 @@ int testFiles_scan() {
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return TESTGOOD;
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}
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int testFiles_readFile() {
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std::ostringstream buf;
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ASSERT(!files::readFile("tests/blabla.exe", buf), "this file should not be read"); //try to read non existing file
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bool r = files::readFile(std::string("tests/filestests.cpp"), buf);
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ASSERT(r, "failed to read");
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//alternative read
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int fd = open("tests/filestests.cpp", O_RDONLY);
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const unsigned int size = 1024*1024; //1MB
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char* buf2 = new char[size];
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ssize_t rc = read(fd, buf2, size);
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ASSERT(rc > 0, rc);
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close(fd);
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//compare
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ASSERT(rc == buf.tellp(), "rc: " << rc << " buf.tellp(): " << buf.tellp());
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ASSERT(std::memcmp(buf2, buf.str().c_str(), rc) == 0, "")
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delete[] buf2;
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return TESTGOOD;
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}
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@ -6,6 +6,7 @@ int testFiles_parent();
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int testFiles_file();
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int testFiles_extention();
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int testFiles_scan();
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int testFiles_readFile();
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int testUtil_Count();
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int testUtil_equalsIgnoreCase();
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@ -21,7 +22,7 @@ int testUtilSplit();
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int testGetDoy();
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test_t tests[] = {testFiles_parent, testFiles_file, testFiles_extention, testFiles_scan,
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test_t tests[] = {testFiles_parent, testFiles_file, testFiles_extention, testFiles_scan, testFiles_readFile,
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testUtil_Count, testUtil_equalsIgnoreCase, testUtil_toLower, testUtil_start_endWith, testUtil_removeStart_End, testUtil_insertStart_End, testUtil_trim, testUtil_base,
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testStringSpliterator, testUtilSplit,
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testGetDoy,
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