fileinput.cc

来自「pixil 最新的嵌入linux 應用程序集,別的地方很難下載」· CC 代码 · 共 100 行

/* MPEG/WAVE Sound library

   (C) 1997 by Woo-jae Jung */

// Binput.cc
// Inputstream from file

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/stat.h>
#include <unistd.h>

#include "mpegsound.h"

/************************/
/* Input bitstrem class */
/************************/
Soundinputstreamfromfile::~Soundinputstreamfromfile()
{
    if (fp)
	fclose(fp);
}

bool
Soundinputstreamfromfile::open(char *filename)
{
    struct stat buf;

    if (filename == NULL) {
	fp = stdin;
	size = 0;
	return true;
    } else if ((fp = fopen(filename, "r")) == NULL) {
	seterrorcode(SOUND_ERROR_FILEOPENFAIL);
	return false;
    }

    stat(filename, &buf);
    size = buf.st_size;

    return true;
}

int
Soundinputstreamfromfile::getbytedirect(void)
{
    int c;

    if ((c = getc(fp)) < 0)
	seterrorcode(SOUND_ERROR_FILEREADFAIL);

    return c;
}

bool
Soundinputstreamfromfile::_readbuffer(char *buffer, int size)
{
    if (fread(buffer, size, 1, fp) != 1) {
	seterrorcode(SOUND_ERROR_FILEREADFAIL);
	return false;
    }
    return true;
}

bool
Soundinputstreamfromfile::eof(void)
{
    return feof(fp);
};

int
Soundinputstreamfromfile::getblock(char *buffer, int size)
{
    return fread(buffer, 1, size, fp);
}

int
Soundinputstreamfromfile::getsize(void)
{
    return size;
}

void
Soundinputstreamfromfile::setposition(int pos)
{
    if (fp == stdin)
	return;
    fseek(fp, pos, SEEK_SET);
}

int
Soundinputstreamfromfile::getposition(void)
{
    if (fp == stdin)
	return 0;
    return ftell(fp);
}