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-rw-r--r--src/tools/ftrandom/ftrandom.c659
1 files changed, 659 insertions, 0 deletions
diff --git a/src/tools/ftrandom/ftrandom.c b/src/tools/ftrandom/ftrandom.c
new file mode 100644
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--- /dev/null
+++ b/src/tools/ftrandom/ftrandom.c
@@ -0,0 +1,659 @@
+/* Copyright (C) 2005 by George Williams */
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+
+ * The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* modified by Werner Lemberg <wl@gnu.org> */
+/* This file is now part of the FreeType library */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <math.h>
+#include <signal.h>
+#include <time.h>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_OUTLINE_H
+
+#define true 1
+#define false 0
+#define forever for (;;)
+
+
+ static int check_outlines = false;
+ static int nohints = false;
+ static int rasterize = false;
+ static char* results_dir = "results";
+
+#define GOOD_FONTS_DIR "/home/wl/freetype-testfonts"
+
+ static char* default_dir_list[] =
+ {
+ GOOD_FONTS_DIR,
+ NULL
+ };
+
+ static char* default_ext_list[] =
+ {
+ "ttf",
+ "otf",
+ "ttc",
+ "cid",
+ "pfb",
+ "pfa",
+ "bdf",
+ "pcf",
+ "pfr",
+ "fon",
+ "otb",
+ "cff",
+ NULL
+ };
+
+ static int error_count = 1;
+ static int error_fraction = 0;
+
+ static FT_F26Dot6 font_size = 12 * 64;
+
+ static struct fontlist
+ {
+ char* name;
+ int len;
+ unsigned int isbinary: 1;
+ unsigned int isascii: 1;
+ unsigned int ishex: 1;
+
+ } *fontlist;
+
+ static int fcnt;
+
+
+ static int
+ FT_MoveTo( const FT_Vector *to,
+ void *user )
+ {
+ return 0;
+ }
+
+
+ static int
+ FT_LineTo( const FT_Vector *to,
+ void *user )
+ {
+ return 0;
+ }
+
+
+ static int
+ FT_ConicTo( const FT_Vector *_cp,
+ const FT_Vector *to,
+ void *user )
+ {
+ return 0;
+ }
+
+
+ static int
+ FT_CubicTo( const FT_Vector *cp1,
+ const FT_Vector *cp2,
+ const FT_Vector *to,
+ void *user )
+ {
+ return 0;
+ }
+
+
+ static FT_Outline_Funcs outlinefuncs =
+ {
+ FT_MoveTo,
+ FT_LineTo,
+ FT_ConicTo,
+ FT_CubicTo,
+ 0, 0 /* No shift, no delta */
+ };
+
+
+ static void
+ TestFace( FT_Face face )
+ {
+ int gid;
+ int load_flags = FT_LOAD_DEFAULT;
+
+
+ if ( check_outlines &&
+ ( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
+ load_flags = FT_LOAD_NO_BITMAP;
+
+ if ( nohints )
+ load_flags |= FT_LOAD_NO_HINTING;
+
+ FT_Set_Char_Size( face, 0, font_size, 72, 72 );
+
+ for ( gid = 0; gid < face->num_glyphs; ++gid )
+ {
+ if ( check_outlines &&
+ ( face->face_flags & FT_FACE_FLAG_SCALABLE ) )
+ {
+ if ( !FT_Load_Glyph( face, gid, load_flags ) )
+ FT_Outline_Decompose( &face->glyph->outline, &outlinefuncs, NULL );
+ }
+ else
+ FT_Load_Glyph( face, gid, load_flags );
+
+ if ( rasterize )
+ FT_Render_Glyph( face->glyph, ft_render_mode_normal );
+ }
+
+ FT_Done_Face( face );
+ }
+
+
+ static void
+ ExecuteTest( char* testfont )
+ {
+ FT_Library context;
+ FT_Face face;
+ int i, num;
+
+
+ if ( FT_Init_FreeType( &context ) )
+ {
+ fprintf( stderr, "Can't initialize FreeType.\n" );
+ exit( 1 );
+ }
+
+ if ( FT_New_Face( context, testfont, 0, &face ) )
+ {
+ /* The font is erroneous, so if this fails that's ok. */
+ exit( 0 );
+ }
+
+ if ( face->num_faces == 1 )
+ TestFace( face );
+ else
+ {
+ num = face->num_faces;
+ FT_Done_Face( face );
+
+ for ( i = 0; i < num; ++i )
+ {
+ if ( !FT_New_Face( context, testfont, i, &face ) )
+ TestFace( face );
+ }
+ }
+
+ exit( 0 );
+ }
+
+
+ static int
+ extmatch( char* filename,
+ char** extensions )
+ {
+ int i;
+ char* pt;
+
+
+ if ( extensions == NULL )
+ return true;
+
+ pt = strrchr( filename, '.' );
+ if ( pt == NULL )
+ return false;
+ if ( pt < strrchr( filename, '/' ) )
+ return false;
+
+ for ( i = 0; extensions[i] != NULL; ++i )
+ if ( strcasecmp( pt + 1, extensions[i] ) == 0 ||
+ strcasecmp( pt, extensions[i] ) == 0 )
+ return true;
+
+ return false;
+ }
+
+
+ static void
+ figurefiletype( struct fontlist* item )
+ {
+ FILE* foo;
+
+
+ item->isbinary = item->isascii = item->ishex = false;
+
+ foo = fopen( item->name, "rb" );
+ if ( foo != NULL )
+ {
+ /* Try to guess the file type from the first few characters... */
+ int ch1 = getc( foo );
+ int ch2 = getc( foo );
+ int ch3 = getc( foo );
+ int ch4 = getc( foo );
+
+
+ fclose( foo );
+
+ if ( ( ch1 == 0 && ch2 == 1 && ch3 == 0 && ch4 == 0 ) ||
+ ( ch1 == 'O' && ch2 == 'T' && ch3 == 'T' && ch4 == 'O' ) ||
+ ( ch1 == 't' && ch2 == 'r' && ch3 == 'u' && ch4 == 'e' ) ||
+ ( ch1 == 't' && ch2 == 't' && ch3 == 'c' && ch4 == 'f' ) )
+ {
+ /* ttf, otf, ttc files */
+ item->isbinary = true;
+ }
+ else if ( ch1 == 0x80 && ch2 == '\01' )
+ {
+ /* PFB header */
+ item->isbinary = true;
+ }
+ else if ( ch1 == '%' && ch2 == '!' )
+ {
+ /* Random PostScript */
+ if ( strstr( item->name, ".pfa" ) != NULL ||
+ strstr( item->name, ".PFA" ) != NULL )
+ item->ishex = true;
+ else
+ item->isascii = true;
+ }
+ else if ( ch1 == 1 && ch2 == 0 && ch3 == 4 )
+ {
+ /* Bare CFF */
+ item->isbinary = true;
+ }
+ else if ( ch1 == 'S' && ch2 == 'T' && ch3 == 'A' && ch4 == 'R' )
+ {
+ /* BDF */
+ item->ishex = true;
+ }
+ else if ( ch1 == 'P' && ch2 == 'F' && ch3 == 'R' && ch4 == '0' )
+ {
+ /* PFR */
+ item->isbinary = true;
+ }
+ else if ( ( ch1 == '\1' && ch2 == 'f' && ch3 == 'c' && ch4 == 'p' ) ||
+ ( ch1 == 'M' && ch2 == 'Z' ) )
+ {
+ /* Windows FON */
+ item->isbinary = true;
+ }
+ else
+ {
+ fprintf( stderr,
+ "Can't recognize file type of `%s', assuming binary\n",
+ item->name );
+ item->isbinary = true;
+ }
+ }
+ else
+ {
+ fprintf( stderr, "Can't open `%s' for typing the file.\n",
+ item->name );
+ item->isbinary = true;
+ }
+ }
+
+
+ static void
+ FindFonts( char** fontdirs,
+ char** extensions )
+ {
+ DIR* examples;
+ struct dirent* ent;
+
+ int i, max;
+ char buffer[1025];
+ struct stat statb;
+
+
+ max = 0;
+ fcnt = 0;
+
+ for ( i = 0; fontdirs[i] != NULL; ++i )
+ {
+ examples = opendir( fontdirs[i] );
+ if ( examples == NULL )
+ {
+ fprintf( stderr,
+ "Can't open example font directory `%s'\n",
+ fontdirs[i] );
+ exit( 1 );
+ }
+
+ while ( ( ent = readdir( examples ) ) != NULL )
+ {
+ snprintf( buffer, sizeof ( buffer ),
+ "%s/%s", fontdirs[i], ent->d_name );
+ if ( stat( buffer, &statb ) == -1 || S_ISDIR( statb.st_mode ) )
+ continue;
+ if ( extensions == NULL || extmatch( buffer, extensions ) )
+ {
+ if ( fcnt >= max )
+ {
+ max += 100;
+ fontlist = realloc( fontlist, max * sizeof ( struct fontlist ) );
+ if ( fontlist == NULL )
+ {
+ fprintf( stderr, "Can't allocate memory\n" );
+ exit( 1 );
+ }
+ }
+
+ fontlist[fcnt].name = strdup( buffer );
+ fontlist[fcnt].len = statb.st_size;
+
+ figurefiletype( &fontlist[fcnt] );
+ ++fcnt;
+ }
+ }
+
+ closedir( examples );
+ }
+
+ if ( fcnt == 0 )
+ {
+ fprintf( stderr, "Can't find matching font files.\n" );
+ exit( 1 );
+ }
+
+ fontlist[fcnt].name = NULL;
+ }
+
+
+ static int
+ getErrorCnt( struct fontlist* item )
+ {
+ if ( error_count == 0 && error_fraction == 0 )
+ return 0;
+
+ return error_count + ceil( error_fraction * item->len );
+ }
+
+
+ static int
+ getRandom( int low,
+ int high )
+ {
+ if ( low - high < 0x10000L )
+ return low + ( ( random() >> 8 ) % ( high + 1 - low ) );
+
+ return low + ( random() % ( high + 1 - low ) );
+ }
+
+
+ static int
+ copyfont( struct fontlist* item,
+ char* newfont )
+ {
+ static char buffer[8096];
+ FILE *good, *new;
+ int len;
+ int i, err_cnt;
+
+
+ good = fopen( item->name, "r" );
+ if ( good == NULL )
+ {
+ fprintf( stderr, "Can't open `%s'\n", item->name );
+ return false;
+ }
+
+ new = fopen( newfont, "w+" );
+ if ( new == NULL )
+ {
+ fprintf( stderr, "Can't create temporary output file `%s'\n",
+ newfont );
+ exit( 1 );
+ }
+
+ while ( ( len = fread( buffer, 1, sizeof ( buffer ), good ) ) > 0 )
+ fwrite( buffer, 1, len, new );
+
+ fclose( good );
+
+ err_cnt = getErrorCnt( item );
+ for ( i = 0; i < err_cnt; ++i )
+ {
+ fseek( new, getRandom( 0, item->len - 1 ), SEEK_SET );
+
+ if ( item->isbinary )
+ putc( getRandom( 0, 0xff ), new );
+ else if ( item->isascii )
+ putc( getRandom( 0x20, 0x7e ), new );
+ else
+ {
+ int hex = getRandom( 0, 15 );
+
+
+ if ( hex < 10 )
+ hex += '0';
+ else
+ hex += 'A' - 10;
+
+ putc( hex, new );
+ }
+ }
+
+ if ( ferror( new ) )
+ {
+ fclose( new );
+ unlink( newfont );
+ return false;
+ }
+
+ fclose( new );
+
+ return true;
+ }
+
+
+ static int child_pid;
+
+ static void
+ abort_test( int sig )
+ {
+ /* If a time-out happens, then kill the child */
+ kill( child_pid, SIGFPE );
+ write( 2, "Timeout... ", 11 );
+ }
+
+
+ static void
+ do_test( void )
+ {
+ int i = getRandom( 0, fcnt - 1 );
+ static int test_num = 0;
+ char buffer[1024];
+
+
+ sprintf( buffer, "%s/test%d", results_dir, test_num++ );
+
+ if ( copyfont ( &fontlist[i], buffer ) )
+ {
+ signal( SIGALRM, abort_test );
+ /* Anything that takes more than 20 seconds */
+ /* to parse and/or rasterize is an error. */
+ alarm( 20 );
+ if ( ( child_pid = fork() ) == 0 )
+ ExecuteTest( buffer );
+ else if ( child_pid != -1 )
+ {
+ int status;
+
+
+ waitpid( child_pid, &status, 0 );
+ alarm( 0 );
+ if ( WIFSIGNALED ( status ) )
+ printf( "Error found in file `%s'\n", buffer );
+ else
+ unlink( buffer );
+ }
+ else
+ {
+ fprintf( stderr, "Can't fork test case.\n" );
+ exit( 1 );
+ }
+ alarm( 0 );
+ }
+ }
+
+
+ static void
+ usage( FILE* out,
+ char* name )
+ {
+ fprintf( out, "%s [options] -- Generate random erroneous fonts\n"
+ " and attempt to parse them with FreeType.\n\n", name );
+
+ fprintf( out, " --all All non-directory files are assumed to be fonts.\n" );
+ fprintf( out, " --check-outlines Make sure we can parse the outlines of each glyph.\n" );
+ fprintf( out, " --dir <path> Append <path> to list of font search directories.\n" );
+ fprintf( out, " --error-count <cnt> Introduce <cnt> single byte errors into each font.\n" );
+ fprintf( out, " --error-fraction <frac> Introduce <frac>*filesize single byte errors\n"
+ " into each font.\n" );
+ fprintf( out, " --ext <ext> Add <ext> to list of extensions indicating fonts.\n" );
+ fprintf( out, " --help Print this.\n" );
+ fprintf( out, " --nohints Turn off hinting.\n" );
+ fprintf( out, " --rasterize Attempt to rasterize each glyph.\n" );
+ fprintf( out, " --results <dir> Directory in which to place the test fonts.\n" );
+ fprintf( out, " --size <float> Use the given font size for the tests.\n" );
+ fprintf( out, " --test <file> Run a single test on an already existing file.\n" );
+ }
+
+
+ int
+ main( int argc,
+ char** argv )
+ {
+ char **dirs, **exts;
+ char *pt, *end;
+ int dcnt = 0, ecnt = 0, rset = false, allexts = false;
+ int i;
+ time_t now;
+ char* testfile = NULL;
+
+
+ dirs = calloc( argc + 1, sizeof ( char ** ) );
+ exts = calloc( argc + 1, sizeof ( char ** ) );
+
+ for ( i = 1; i < argc; ++i )
+ {
+ pt = argv[i];
+ if ( pt[0] == '-' && pt[1] == '-' )
+ ++pt;
+
+ if ( strcmp( pt, "-all" ) == 0 )
+ allexts = true;
+ else if ( strcmp( pt, "-check-outlines" ) == 0 )
+ check_outlines = true;
+ else if ( strcmp( pt, "-dir" ) == 0 )
+ dirs[dcnt++] = argv[++i];
+ else if ( strcmp( pt, "-error-count" ) == 0 )
+ {
+ if ( !rset )
+ error_fraction = 0;
+ rset = true;
+ error_count = strtol( argv[++i], &end, 10 );
+ if ( *end != '\0' )
+ {
+ fprintf( stderr, "Bad value for error-count: %s\n", argv[i] );
+ exit( 1 );
+ }
+ }
+ else if ( strcmp( pt, "-error-fraction" ) == 0 )
+ {
+ if ( !rset )
+ error_count = 0;
+ rset = true;
+ error_fraction = strtod( argv[++i], &end );
+ if ( *end != '\0' )
+ {
+ fprintf( stderr, "Bad value for error-fraction: %s\n", argv[i] );
+ exit( 1 );
+ }
+ }
+ else if ( strcmp( pt, "-ext" ) == 0 )
+ exts[ecnt++] = argv[++i];
+ else if ( strcmp( pt, "-help" ) == 0 )
+ {
+ usage( stdout, argv[0] );
+ exit( 0 );
+ }
+ else if ( strcmp( pt, "-nohints" ) == 0 )
+ nohints = true;
+ else if ( strcmp( pt, "-rasterize" ) == 0 )
+ rasterize = true;
+ else if ( strcmp( pt, "-results" ) == 0 )
+ results_dir = argv[++i];
+ else if ( strcmp( pt, "-size" ) == 0 )
+ {
+ font_size = (FT_F26Dot6)( strtod( argv[++i], &end ) * 64 );
+ if ( *end != '\0' || font_size < 64 )
+ {
+ fprintf( stderr, "Bad value for size: %s\n", argv[i] );
+ exit( 1 );
+ }
+ }
+ else if ( strcmp( pt, "-test" ) == 0 )
+ testfile = argv[++i];
+ else
+ {
+ usage( stderr, argv[0] );
+ exit( 1 );
+ }
+ }
+
+ if ( allexts )
+ exts = NULL;
+ else if ( ecnt == 0 )
+ exts = default_ext_list;
+
+ if ( dcnt == 0 )
+ dirs = default_dir_list;
+
+ if ( testfile != NULL )
+ ExecuteTest( testfile ); /* This should never return */
+
+ time( &now );
+ srandom( now );
+
+ FindFonts( dirs, exts );
+ mkdir( results_dir, 0755 );
+
+ forever
+ do_test();
+
+ return 0;
+ }
+
+
+/* EOF */
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