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PhotoRec: Stricter check for Fortran recovery

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This commit is contained in:
Christophe Grenier 2008-05-30 18:10:11 +02:00
parent dbbedfd758
commit 938612ae1c
1 changed files with 26 additions and 23 deletions
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49
src/file_txt.c
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@ -577,15 +577,33 @@ static int header_check_txt(const unsigned char *buffer, const unsigned int buff
}
{
const char *ext=NULL;
/* Detect Fortran */
/* ind=~0: random
* ind=~1: constant */
double ind=1;
unsigned int nbr=0;
char *str=buffer_lower;
while((str=strstr(str, "\n "))!=NULL)
/* Detect Fortran */
{
nbr++;
str++;
char *str=buffer_lower;
while((str=strstr(str, "\n "))!=NULL)
{
nbr++;
str++;
}
}
if(nbr>10)
if(i>1)
{
unsigned int stats[256];
unsigned int j;
memset(&stats, 0, sizeof(stats));
for(j=0;j<i;j++)
stats[buffer[j]]++;
ind=0;
for(j=0;j<256;j++)
if(stats[j]>0)
ind+=stats[j]*(stats[j]-1);
ind=ind/i/(i-1);
}
if(nbr>10 && i<=0.90)
ext="f";
/* Detect LaTeX, C, PHP, JSP, ASP, HTML, C header */
else if(strstr(buffer_lower, sign_tex)!=NULL)
@ -604,25 +622,10 @@ static int header_check_txt(const unsigned char *buffer, const unsigned int buff
ext="html";
else if(strstr(buffer_lower, sign_h)!=NULL && i>50)
ext="h";
else if(i<100)
else if(i<100 || ind<0.03 || ind>0.90)
ext=NULL;
else
{
unsigned int stats[256];
unsigned int j;
double ind=0;
memset(&stats, 0, sizeof(stats));
for(j=0;j<i;j++)
stats[buffer[j]]++;
for(j=0;j<256;j++)
if(stats[j]>0)
ind+=stats[j]*(stats[j]-1);
ind=ind/i/(i-1);
if(ind<0.03 || ind>0.90)
ext=NULL;
else
ext=file_hint_txt.extension;
}
ext=file_hint_txt.extension;
if(ext!=NULL && strcmp(ext,"txt")==0 &&
(strstr(buffer_lower,"<br>")!=NULL || strstr(buffer_lower,"<p>")!=NULL))
{