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/* misc.c
*
* Copyright (C) 1996-2014 Timo Kokkonen
* All Rights Reserved.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include "jpegoptim.h"
int delete_file(const char *name)
{
int retval;
if (!name) return -1;
if (verbose_mode > 1 && !quiet_mode) fprintf(stderr,"deleting: %s\n",name);
if ((retval=unlink(name)) && !quiet_mode)
warn("error removing file: %s",name);
return retval;
}
long file_size(FILE *fp)
{
struct stat buf;
if (!fp) return -1;
if (fstat(fileno(fp),&buf)) return -2;
return (long)buf.st_size;
}
int is_directory(const char *pathname)
{
struct stat buf;
if (!pathname) return 0;
if (stat(pathname,&buf) != 0) return 0;
if (S_ISDIR(buf.st_mode)) return 1;
return 0;
}
int is_file(const char *filename, struct stat *st)
{
struct stat buf;
if (!filename) return 0;
if (lstat(filename,&buf) != 0) return 0;
if (st) *st=buf;
if (S_ISREG(buf.st_mode)) return 1;
return 0;
}
int file_exists(const char *pathname)
{
struct stat buf;
if (!pathname) return 0;
if (stat(pathname,&buf) != 0) return 0;
return 1;
}
int rename_file(const char *old_path, const char *new_path)
{
if (!old_path || !new_path) return -1;
#ifdef WIN32
if (file_exists(new_path)) delete_file(new_path);
#endif
return rename(old_path,new_path);
}
#define COPY_BUF_SIZE (256*1024)
int copy_file(const char *srcfile, const char *dstfile)
{
FILE *in,*out;
unsigned char buf[COPY_BUF_SIZE];
int r,w;
int err=0;
if (!srcfile || !dstfile) return -1;
in=fopen(srcfile,"rb");
if (!in) {
warn("failed to open file for reading: %s", srcfile);
return -2;
}
out=fopen(dstfile,"wb");
if (!out) {
fclose(in);
warn("failed to open file for writing: %s", dstfile);
return -3;
}
do {
r=fread(buf,1,sizeof(buf),in);
if (r > 0) {
w=fwrite(buf,1,r,out);
if (w != r) {
err=1;
warn("error writing to file: %s", dstfile);
break;
}
} else {
if (ferror(in)) {
err=2;
warn("error reading file: %s", srcfile);
break;
}
}
} while (!feof(in));
fclose(out);
fclose(in);
return err;
}
char *splitdir(const char *pathname, char *buf, int buflen)
{
char *s = NULL;
int size = 0;
if (!pathname || !buf || buflen < 2) return NULL;
if ((s = strrchr(pathname,DIR_SEPARATOR_C))) size = (s-pathname)+1;
if (size >= buflen) return NULL;
if (size > 0) memcpy(buf,pathname,size);
buf[size]=0;
return buf;
}
char *splitname(const char *pathname, char *buf, int buflen)
{
const char *s = NULL;
int size = 0;
if (!pathname || !buf || buflen < 2) return NULL;
if ((s = strrchr(pathname,DIR_SEPARATOR_C))) {
s++;
} else {
s=pathname;
}
size=strlen(s);
if (size >= buflen) return NULL;
if (size > 0) memcpy(buf,s,size);
buf[size]=0;
return buf;
}
void fatal(const char *format, ...)
{
va_list args;
fprintf(stderr, PROGRAMNAME ": ");
va_start(args,format);
vfprintf(stderr, format, args);
va_end(args);
fprintf(stderr,"\n");
fflush(stderr);
exit(3);
}
void warn(const char *format, ...)
{
va_list args;
if (quiet_mode) return;
fprintf(stderr, PROGRAMNAME ": ");
va_start(args,format);
vfprintf(stderr, format, args);
va_end(args);
fprintf(stderr,"\n");
fflush(stderr);
}
/* eof :-) */
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