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(trunk) add tr_formatter_size() and tr_formatter_speed() so that all the client apps don't have to reinvent the wheel

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This commit is contained in:
Charles Kerr
2010-06-22 04:34:16 +00:00
parent 5701ac82e0
commit 1d63aa4cda
9 changed files with 185 additions and 147 deletions
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81
libtransmission/utils.c
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@@ -1502,3 +1502,84 @@ tr_realpath( const char * path, char * resolved_path )
return realpath( path, resolved_path );
#endif
}
/***
****
****
****
***/
struct formatter_units
{
double KB_val;
double MB_val;
double GB_val;
const char * B_str;
const char * KB_str;
const char * MB_str;
const char * GB_str;
};
static void
formatter_init( struct formatter_units * units,
double kilo,
const char * b, const char * kb,
const char * mb, const char * gb )
{
units->B_str = tr_strdup( b );
units->KB_str = tr_strdup( kb );
units->MB_str = tr_strdup( mb );
units->GB_str = tr_strdup( gb );
units->KB_val = kilo;
units->MB_val = kilo * kilo;
units->GB_val = kilo * kilo * kilo;
}
static char*
formatter_get_size_str( const struct formatter_units * u,
char * buf, uint64_t bytes, size_t buflen )
{
int precision;
double val;
const char * units;
if( bytes < u->KB_val ) { val = bytes; units = u->B_str; }
else if( bytes < u->MB_val ) { val = bytes / u->KB_val; units = u->KB_str; }
else if( bytes < u->GB_val ) { val = bytes / u->MB_val; units = u->MB_str; }
else { val = bytes / u->GB_val; units = u->GB_str; }
precision = val < 100 ? 2 : 1;
tr_snprintf( buf, buflen, "%.*f %s", precision, val, units );
return buf;
}
static struct formatter_units size_units = { 0, 0, 0, NULL, NULL, NULL, NULL };
void
tr_formatter_size_init( double kilo, const char * b, const char * kb,
const char * mb, const char * gb )
{
formatter_init( &size_units, kilo, b, kb, mb, gb );
}
char*
tr_formatter_size( char * buf, uint64_t bytes, size_t buflen )
{
return formatter_get_size_str( &size_units, buf, bytes, buflen );
}
static struct formatter_units speed_units = { 0, 0, 0, NULL, NULL, NULL, NULL };
void
tr_formatter_speed_init( double kilo, const char * b, const char * kb,
const char * mb, const char * gb )
{
formatter_init( &speed_units, kilo, b, kb, mb, gb );
}
char*
tr_formatter_speed( char * buf, uint64_t bytes_per_second, size_t buflen )
{
return formatter_get_size_str( &speed_units, buf, bytes_per_second, buflen );
}