tracy/nfd/nfd_common.c
2017-10-10 21:56:15 +02:00

143 lines
2.7 KiB
C

/*
Native File Dialog
http://www.frogtoss.com/labs
*/
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include "nfd_common.h"
static char g_errorstr[NFD_MAX_STRLEN] = {0};
/* public routines */
const char *NFD_GetError( void )
{
return g_errorstr;
}
size_t NFD_PathSet_GetCount( const nfdpathset_t *pathset )
{
assert(pathset);
return pathset->count;
}
nfdchar_t *NFD_PathSet_GetPath( const nfdpathset_t *pathset, size_t num )
{
assert(pathset);
assert(num < pathset->count);
return pathset->buf + pathset->indices[num];
}
void NFD_PathSet_Free( nfdpathset_t *pathset )
{
assert(pathset);
NFDi_Free( pathset->indices );
NFDi_Free( pathset->buf );
}
/* internal routines */
void *NFDi_Malloc( size_t bytes )
{
void *ptr = malloc(bytes);
if ( !ptr )
NFDi_SetError("NFDi_Malloc failed.");
return ptr;
}
void NFDi_Free( void *ptr )
{
assert(ptr);
free(ptr);
}
void NFDi_SetError( const char *msg )
{
int bTruncate = NFDi_SafeStrncpy( g_errorstr, msg, NFD_MAX_STRLEN );
assert( !bTruncate ); _NFD_UNUSED(bTruncate);
}
int NFDi_SafeStrncpy( char *dst, const char *src, size_t maxCopy )
{
size_t n = maxCopy;
char *d = dst;
assert( src );
assert( dst );
while ( n > 0 && *src != '\0' )
{
*d++ = *src++;
--n;
}
/* Truncation case -
terminate string and return true */
if ( n == 0 )
{
dst[maxCopy-1] = '\0';
return 1;
}
/* No truncation. Append a single NULL and return. */
*d = '\0';
return 0;
}
/* adapted from microutf8 */
size_t NFDi_UTF8_Strlen( const nfdchar_t *str )
{
/* This function doesn't properly check validity of UTF-8 character
sequence, it is supposed to use only with valid UTF-8 strings. */
size_t character_count = 0;
size_t i = 0; /* Counter used to iterate over string. */
nfdchar_t maybe_bom[4];
/* If there is UTF-8 BOM ignore it. */
if (strlen(str) > 2)
{
strncpy(maybe_bom, str, 3);
maybe_bom[3] = 0;
if (strcmp(maybe_bom, (nfdchar_t*)NFD_UTF8_BOM) == 0)
i += 3;
}
while(str[i])
{
if (str[i] >> 7 == 0)
{
/* If bit pattern begins with 0 we have ascii character. */
++character_count;
}
else if (str[i] >> 6 == 3)
{
/* If bit pattern begins with 11 it is beginning of UTF-8 byte sequence. */
++character_count;
}
else if (str[i] >> 6 == 2)
; /* If bit pattern begins with 10 it is middle of utf-8 byte sequence. */
else
{
/* In any other case this is not valid UTF-8. */
return -1;
}
++i;
}
return character_count;
}
int NFDi_IsFilterSegmentChar( char ch )
{
return (ch==','||ch==';'||ch=='\0');
}