/Users/maurits/Documents/studie/afstuderen/biosphere/common/io.c

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/*
 * Author: MA Hartman
 * Date: mar 31, 2007
 * 
 * Function:
 * General I/O functions for use with memory pools.
 * 
 * License information:
 * 
 * Copyright (c) 2006 Maurits Hartman
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
 
 #include "io.h"
 
 #include <apr_file_io.h>
 #include <apr_strings.h>
 #include <string.h>
 
 
 bs_status read_file_into_buf(const char *fname, char **buf,
                bs_uint64 *len, apr_pool_t *mp)
{
        apr_status_t rv;
        apr_file_t *fp;
        char *collect = NULL, tmp[1024];
        apr_size_t length;
        
        /* Try to open the file for reading: */
        rv = apr_file_open(&fp, fname, APR_FOPEN_READ, APR_OS_DEFAULT, mp);
        if (rv != APR_SUCCESS) return BS_ERROR;
        
        /* Read until the end */
        *len = 0;
        memset(tmp, '\0', sizeof(tmp));
        while (1) {
                length = sizeof(tmp);
                rv = apr_file_read(fp, tmp, &length);
                if (rv != APR_SUCCESS || length == 0) break;
                
                if (collect == NULL) collect = apr_pstrdup(mp, tmp); /* First iteration */
                else collect = apr_pstrcat(mp, collect, tmp, NULL);
                *len += length;
        }
        
        *buf = collect;
        apr_file_close(fp);
        return BS_OK;
}


bs_status write_buf_into_file(const char *fname, const char *buf,
                apr_pool_t *mp)
{
        apr_status_t rv;
        apr_file_t *fp;
        apr_size_t length;
        
        /* Try to open the file for writing: */
        rv = apr_file_open(&fp, fname,
                        APR_FOPEN_READ|APR_FOPEN_WRITE, APR_OS_DEFAULT, mp);
        if (rv != APR_SUCCESS) return BS_ERROR;
        
        /* Write buffer to file: */
        length = strlen(buf);
        rv = apr_file_write(fp, buf, &length);
        if (rv != APR_SUCCESS || length == 0) return BS_ERROR;
        
        /* Close file and return: */
        apr_file_close(fp);
        return BS_OK;
}

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