best makefile

[webserver.git] / file.c

#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "debug.h"

#include "file.h"

#define TLEN 8

/* read full file */

int readfile (char **buffer, char *filename)
{

    /* open file */

    VERBOSE (DEBUG, PRINT ("Opening file %s for reading\n", filename));
    FILE *fd = fopen (filename, "rb");
    if (fd == NULL) {
        VERBOSE (WARNING, PRINT ("Can't open file (%s) for reading\n", filename));
        return -1;
    }

    VERBOSE (DEBUG, PRINT ("Seek file size\n"));
    fseek (fd, 0, SEEK_END);
    int size = ftell (fd);
    fseek (fd, 0, SEEK_SET);  /* same as rewind(f); */

    /* read full file */

    VERBOSE (DEBUG, PRINT ("Reading %d bytes\n", size));
    *buffer = calloc (size + 1, 1);
    int len = fread (*buffer, 1, size, fd);
    if (len != size) {
        VERBOSE (WARNING, PRINT ("Can't read full file (%s)\n", filename));
    }
    fclose (fd);

    (*buffer)[len] = 0;
    return len;
}

/* temp name */

char *tempname (char *tempdir, char *ext)
{
    char table[65] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_";

    unsigned int len = strlen (tempdir) + 1 + 4 + TLEN + ((ext) ? strlen (ext) : 0) + 1;
    char *name = (char *) calloc (len, 1);

    sprintf (name, "%s/tmp-", tempdir);
    while (strlen (name) + 1 < len - ((ext) ? strlen (ext) : 0)) {
        name[strlen (name)] = table[rand () % 64];
    }
    if (ext) {
        strcat (name, ext);
    }

    return name;
}

/* write full file */

int writefile (char *filename, char *buffer, int size)
{

    /* open file */

    VERBOSE (DEBUG, PRINT ("Opening file %s for writing\n", filename));
    FILE *fd = fopen (filename, "wb");
    if (fd == NULL) {
        VERBOSE (WARNING, PRINT ("Can't open file (%s) for writing\n", filename));
        return -1;
    }

    /* write full file */

    VERBOSE (DEBUG, PRINT ("Writing %d bytes\n", size));
    int len = fwrite (buffer, size, 1, fd);
    if (len != size) {
        VERBOSE (WARNING, PRINT ("Can't write full file (%s)\n", filename));
    }
    fclose (fd);

    return len;
}

/* vim: set ts=4 sw=4 et: */