jpegphoto.c

来自「ftam等标准协议服务器和客户端的源代码。」· C语言 代码 · 共 171 行

/* jpegphoto.c - your comments here */

#ifndef	lint
static char *rcsid = "$Header: /xtel/isode/isode/others/quipu/photo/RCS/jpegphoto.c,v 9.0 1992/06/16 12:43:35 isode Rel $";
#endif

/* 
 * $Header: /xtel/isode/isode/others/quipu/photo/RCS/jpegphoto.c,v 9.0 1992/06/16 12:43:35 isode Rel $
 *
 *
 * $Log: jpegphoto.c,v $
 * Revision 9.0  1992/06/16  12:43:35  isode
 * Release 8.0
 *
 */

/*
 *				  NOTICE
 *
 *    Acquisition, use, and distribution of this module and related
 *    materials are subject to the restrictions of a license agreement.
 *    Consult the Preface in the User's Manual for the full terms of
 *    this agreement.
 *
 */

/*
 *
 * jpegphoto- Read standard input and pipe output to correct displayer
 *
 * Russ Wright - Lawrence Berkeley Laboratory-  Oct 1991
 */

#include <stdio.h>
#include "tailor.h"
#include "general.h"
#include "jpeg.h"
#include <signal.h>

#define BAD_EXIT        -1

char            command[512];

int
mygetchar()
{
    char            c;

    if (!read(0, &c, 1))
        return (EOF);
    else
        return (c);
}

/*
 * SkipAsn1Len - skip the ASN-1 encoded length (variable # of octets)
 */
void
SkipAsn1Len()
{
    unsigned char   c;

    c = mygetchar();

    if (c > 0x80)
    {
        c &= ~0x80;
        while (c--)
        {
            (void) mygetchar();
        }
    }
}

void
DoG3Fax(firstChar)
unsigned char firstChar;
{
    char            buffer[8192];
    FILE           *newPipe;
    int             len;

    (void) strncpy(command, isodefile("g3fax/Xphoto", 1), sizeof(command) - 1);
        (void) fprintf(stderr, "command IS '%s' ", command);
    newPipe = popen(command, "w");
    if (newPipe == NULL)
    {
        (void) fprintf(stderr, "command '%s' failed", command);
        perror(" ");
        exit(BAD_EXIT);
    }
    (void) fwrite((char *)&firstChar, 1, 1, newPipe);

    while (len = read(0, buffer, sizeof(buffer)))
    {
        if (!fwrite(buffer, 1, len, newPipe))
        {
            (void) fprintf(stderr, "write to pipe failed for '%s'", command);
            perror(" ");
            exit(BAD_EXIT);
        }
    }

    (void) pclose(newPipe);
    exit(0);
}

void
DoNewJPEG()
{
    SkipAsn1Len();

    (void) strncpy(command, isodefile("g3fax/jpeg.sh", 1), sizeof(command) - 1);

    if (execl(command, "xphoto-jpeg", 0))
    {
        (void) fprintf(stderr, "command '%s' failed", command);
        perror(" ");
        exit(BAD_EXIT);
    }
/*NOTREACHED*/
}

void
DoJPEG()
{
    SkipAsn1Len();

    (void) strncpy(command, isodefile("g3fax/jpeg.sh", 1), sizeof(command) - 1);

    if (execl(command, "xphoto-jpeg", 0))
    {
        (void) fprintf(stderr, "command '%s' failed", command);
        perror(" ");
        exit(BAD_EXIT);
    }
/*NOTREACHED*/
}

/* ARGSUSED */
void
main(argc, argv, envp)
int             argc;
char          **argv,
              **envp;
{
    unsigned char   firstChar;

    firstChar = mygetchar();

    /* test first octet */

    switch (firstChar)
    {
    case NEW_JPEG_TAG:
        DoNewJPEG();
        break;
    case JPEG_TAG:
        DoJPEG();
        break;
    case OLD_G3Fax_TAG:
    case G3Fax_TAG:
        DoG3Fax(firstChar);
        break;
    default:
        (void) fprintf(stderr, "Unknown Photo Format: %d\n", firstChar);
        exit(BAD_EXIT);
    }
/*NOTREACHED*/
}