include/readFile.h File Reference

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Data Structures
struct	readFile
Functions
readFile	readFile_open (char *filename)
void	readFile_close (struct readFile readFile)
int	readFile_checkOpen (char *filename)

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Function Documentation

int readFile_checkOpen

(

char *

filename

)

Definition at line 59 of file readFile.c.

Referenced by readdb_open().

{
        FILE* file;

        if ((file = fopen(filename, "r")) != NULL)
    {
        fclose(file);
        return 1;
        }
    else
                return 0;
}

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void readFile_close

(

struct readFile

readFile

)

Definition at line 73 of file readFile.c.

References readFile::address, readFile::fileDescriptor, and readFile::fileSize.

Referenced by main(), readdb_close(), and readdb_nextVolume().

{
        if (munmap(readFile.address, readFile.fileSize) < 0)
        {
        fprintf(stderr, "%s\n", strerror(errno));
                fprintf(stderr, "Error unmapping file\n");
                exit(-1);
        }
        close(readFile.fileDescriptor);
}

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struct readFile readFile_open

(

char *

filename

)

[read]

Definition at line 22 of file readFile.c.

References readFile::address, readFile::fileDescriptor, and readFile::fileSize.

Referenced by main(), readdb_nextVolume(), and readdb_open().

{
        struct stat fileStats;
        struct readFile readFile;

        // Open file for reading
        if ((readFile.fileDescriptor = open(filename, O_RDONLY)) == -1)
        {
        fprintf(stderr, "%s\n", strerror(errno));
                fprintf(stderr, "Error opening file %s for reading\n", filename);
                exit(-1);
        }

        // Get length of file
        if (fstat(readFile.fileDescriptor, &fileStats) == -1)
        {
        fprintf(stderr, "%s\n", strerror(errno));
                fprintf(stderr, "Error opening file %s for reading\n", filename);
                exit(-1);
        }
        readFile.fileSize = fileStats.st_size;

    // Map address to fileSize bytes of application address space
    readFile.address = mmap(0, readFile.fileSize, PROT_READ, MAP_SHARED, readFile.fileDescriptor, 0);

    // Check for error in mapping
        if (readFile.address == (void*)MAP_FAILED)
        {
        fprintf(stderr, "%s\n", strerror(errno));
                fprintf(stderr, "Error opening file %s for reading\n", filename);
                exit(-1);
        }

        return readFile;
}

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