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/*
* This little program is used to parse the FreeType headers and
* find the declaration of all public APIs. This is easy, because
* they all look like the following:
*
* FT_EXPORT( return_type )
* function_name( function arguments );
*
* You must pass the list of header files as arguments. Wildcards are
* accepted if you are using GCC for compilation (and probably by
* other compilers too).
*
* Author: FreeType team, 2005-2023
*
* This code is explicitly placed into the public domain.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include "vms_shorten_symbol.c"
#define PROGRAM_NAME "apinames"
#define PROGRAM_VERSION "0.5"
#define LINEBUFF_SIZE 1024
typedef enum OutputFormat_
{
OUTPUT_LIST = 0, /* output the list of names, one per line */
OUTPUT_WINDOWS_DEF, /* output a Windows .DEF file for Visual C++ or Mingw */
OUTPUT_BORLAND_DEF, /* output a Windows .DEF file for Borland C++ */
OUTPUT_WATCOM_LBC, /* output a Watcom Linker Command File */
OUTPUT_VMS_OPT, /* output an OpenVMS Linker Option File */
OUTPUT_NETWARE_IMP, /* output a NetWare ImportFile */
OUTPUT_GNU_VERMAP /* output a version map for GNU or Solaris linker */
} OutputFormat;
static void
panic( const char* fmt,
... )
{
va_list ap;
fprintf( stderr, "PANIC: " );
va_start( ap, fmt );
vfprintf( stderr, fmt, ap );
va_end( ap );
fprintf( stderr, "\n" );
exit(2);
}
typedef struct NameRec_
{
char* name;
unsigned int hash;
} NameRec, *Name;
static Name the_names;
static int num_names;
static int max_names;
static void
names_add( const char* name,
const char* end )
{
unsigned int h;
int nn, len;
Name nm;
if ( end <= name )
return;
/* compute hash value */
len = (int)( end - name );
h = 0;
for ( nn = 0; nn < len; nn++ )
h = h * 33 + name[nn];
/* check for an pre-existing name */
for ( nn = 0; nn < num_names; nn++ )
{
nm = the_names + nn;
if ( (int)nm->hash == h &&
memcmp( name, nm->name, len ) == 0 &&
nm->name[len] == 0 )
return;
}
/* add new name */
if ( num_names >= max_names )
{
max_names += ( max_names >> 1 ) + 4;
the_names = (NameRec*)realloc( the_names,
sizeof ( the_names[0] ) * max_names );
if ( !the_names )
panic( "not enough memory" );
}
nm = &the_names[num_names++];
nm->hash = h;
nm->name = (char*)malloc( len + 1 );
if ( !nm->name )
panic( "not enough memory" );
memcpy( nm->name, name, len );
nm->name[len] = 0;
}
static int
name_compare( const void* name1,
const void* name2 )
{
Name n1 = (Name)name1;
Name n2 = (Name)name2;
return strcmp( n1->name, n2->name );
}
static void
names_sort( void )
{
qsort( the_names, (size_t)num_names,
sizeof ( the_names[0] ), name_compare );
}
static void
names_dump( FILE* out,
OutputFormat format,
const char* dll_name )
{
int nn;
switch ( format )
{
case OUTPUT_WINDOWS_DEF:
if ( dll_name )
fprintf( out, "LIBRARY %s\n", dll_name );
fprintf( out, "DESCRIPTION FreeType 2 DLL\n" );
fprintf( out, "EXPORTS\n" );
for ( nn = 0; nn < num_names; nn++ )
fprintf( out, " %s\n", the_names[nn].name );
break;
case OUTPUT_BORLAND_DEF:
if ( dll_name )
fprintf( out, "LIBRARY %s\n", dll_name );
fprintf( out, "DESCRIPTION FreeType 2 DLL\n" );
fprintf( out, "EXPORTS\n" );
for ( nn = 0; nn < num_names; nn++ )
fprintf( out, " _%s\n", the_names[nn].name );
break;
case OUTPUT_WATCOM_LBC:
{
const char* dot;
if ( !dll_name )
{
fprintf( stderr,
"you must provide a DLL name with the -d option!\n" );
exit( 4 );
}
/* we must omit the `.dll' suffix from the library name */
dot = strchr( dll_name, '.' );
if ( dot )
{
char temp[512];
int len = dot - dll_name;
if ( len > (int)( sizeof ( temp ) - 1 ) )
len = sizeof ( temp ) - 1;
memcpy( temp, dll_name, len );
temp[len] = 0;
dll_name = (const char*)temp;
}
for ( nn = 0; nn < num_names; nn++ )
fprintf( out, "++_%s.%s.%s\n",
the_names[nn].name, dll_name, the_names[nn].name );
}
break;
case OUTPUT_VMS_OPT:
fprintf( out, "case_sensitive=YES\n" );
for ( nn = 0; nn < num_names; nn++ )
{
char short_symbol[32];
if ( vms_shorten_symbol( the_names[nn].name, short_symbol, 1 ) == -1 )
panic( "could not shorten name '%s'", the_names[nn].name );
fprintf( out, "symbol_vector = ( %s = PROCEDURE)\n", short_symbol );
/* Also emit a 64-bit symbol, as created by the `vms_auto64` tool. */
/* It has the string '64__' appended to its name. */
strcat( the_names[nn].name , "64__" );
if ( vms_shorten_symbol( the_names[nn].name, short_symbol, 1 ) == -1 )
panic( "could not shorten name '%s'", the_names[nn].name );
fprintf( out, "symbol_vector = ( %s = PROCEDURE)\n", short_symbol );
}
break;
case OUTPUT_NETWARE_IMP:
if ( dll_name )
fprintf( out, " (%s)\n", dll_name );
for ( nn = 0; nn < num_names - 1; nn++ )
fprintf( out, " %s,\n", the_names[nn].name );
fprintf( out, " %s\n", the_names[num_names - 1].name );
break;
case OUTPUT_GNU_VERMAP:
fprintf( out, "{\n\tglobal:\n" );
for ( nn = 0; nn < num_names; nn++ )
fprintf( out, "\t\t%s;\n", the_names[nn].name );
fprintf( out, "\tlocal:\n\t\t*;\n};\n" );
break;
default: /* LIST */
for ( nn = 0; nn < num_names; nn++ )
fprintf( out, "%s\n", the_names[nn].name );
break;
}
}
/* states of the line parser */
typedef enum State_
{
STATE_START = 0, /* waiting for FT_EXPORT keyword and return type */
STATE_TYPE /* type was read, waiting for function name */
} State;
static int
read_header_file( FILE* file,
int verbose )
{
static char buff[LINEBUFF_SIZE + 1];
State state = STATE_START;
while ( !feof( file ) )
{
char* p;
if ( !fgets( buff, LINEBUFF_SIZE, file ) )
break;
p = buff;
/* skip leading whitespace */
while ( *p == ' ' || *p == '\t' )
p++;
/* skip empty lines */
if ( *p == '\n' || *p == '\r' )
continue;
switch ( state )
{
case STATE_START:
if ( memcmp( p, "FT_EXPORT(", 10 ) != 0 )
break;
p += 10;
for (;;)
{
if ( *p == 0 || *p == '\n' || *p == '\r' )
goto NextLine;
if ( *p == ')' )
{
p++;
break;
}
p++;
}
state = STATE_TYPE;
/*
* Sometimes, the name is just after `FT_EXPORT(...)', so skip
* whitespace and fall-through if we find an alphanumeric character.
*/
while ( *p == ' ' || *p == '\t' )
p++;
if ( !isalpha( *p ) )
break;
/* fall-through */
case STATE_TYPE:
{
char* name = p;
while ( isalnum( *p ) || *p == '_' )
p++;
if ( p > name )
{
if ( verbose )
fprintf( stderr, ">>> %.*s\n", (int)( p - name ), name );
names_add( name, p );
}
state = STATE_START;
}
break;
default:
;
}
NextLine:
;
} /* end of while loop */
return 0;
}
static void
usage( void )
{
static const char* const format =
"%s %s: extract FreeType API names from header files\n"
"\n"
"This program extracts the list of public FreeType API functions.\n"
"It receives a list of header files as an argument and\n"
"generates a sorted list of unique identifiers in various formats.\n"
"\n"
"usage: %s header1 [options] [header2 ...]\n"
"\n"
"options: - parse the contents of stdin, ignore arguments\n"
" -v verbose mode, output sent to standard error\n"
" -oFILE write output to FILE instead of standard output\n"
" -dNAME indicate DLL file name, 'freetype.dll' by default\n"
" -w output .DEF file for Visual C++ and Mingw\n"
" -wB output .DEF file for Borland C++\n"
" -wW output Watcom Linker Response File\n"
" -wV output OpenVMS Linker Options File\n"
" -wN output NetWare Import File\n"
" -wL output version map for GNU or Solaris linker\n"
"\n";
fprintf( stderr,
format,
PROGRAM_NAME,
PROGRAM_VERSION,
PROGRAM_NAME );
exit( 1 );
}
int
main( int argc,
const char* const* argv )
{
int from_stdin = 0;
int verbose = 0;
OutputFormat format = OUTPUT_LIST; /* the default */
FILE* out = stdout;
const char* library_name = NULL;
if ( argc < 2 )
usage();
/* `-' used as a single argument means read source file from stdin */
while ( argc > 1 && argv[1][0] == '-' )
{
const char* arg = argv[1];
switch ( arg[1] )
{
case 'v':
verbose = 1;
break;
case 'o':
if ( arg[2] == 0 )
{
if ( argc < 2 )
usage();
arg = argv[2];
argv++;
argc--;
}
else
arg += 2;
out = fopen( arg, "wt" );
if ( !out )
{
fprintf( stderr, "could not open '%s' for writing\n", arg );
exit( 3 );
}
break;
case 'd':
if ( arg[2] == 0 )
{
if ( argc < 2 )
usage();
arg = argv[2];
argv++;
argc--;
}
else
arg += 2;
library_name = arg;
break;
case 'w':
format = OUTPUT_WINDOWS_DEF;
switch ( arg[2] )
{
case 'B':
format = OUTPUT_BORLAND_DEF;
break;
case 'W':
format = OUTPUT_WATCOM_LBC;
break;
case 'V':
format = OUTPUT_VMS_OPT;
break;
case 'N':
format = OUTPUT_NETWARE_IMP;
break;
case 'L':
format = OUTPUT_GNU_VERMAP;
break;
case 0:
break;
default:
usage();
}
break;
case 0:
from_stdin = 1;
break;
default:
usage();
}
argc--;
argv++;
} /* end of while loop */
if ( from_stdin )
read_header_file( stdin, verbose );
else
{
for ( --argc, argv++; argc > 0; argc--, argv++ )
{
FILE* file = fopen( argv[0], "rb" );
if ( !file )
fprintf( stderr, "unable to open '%s'\n", argv[0] );
else
{
if ( verbose )
fprintf( stderr, "opening '%s'\n", argv[0] );
read_header_file( file, verbose );
fclose( file );
}
}
}
if ( num_names == 0 )
panic( "could not find exported functions\n" );
names_sort();
names_dump( out, format, library_name );
if ( out != stdout )
fclose( out );
return 0;
}
/* END */