463 lines
14 KiB
Plaintext
463 lines
14 KiB
Plaintext
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unit imjerror;
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{ This file contains simple error-reporting and trace-message routines.
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These are suitable for Unix-like systems and others where writing to
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stderr is the right thing to do. Many applications will want to replace
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some or all of these routines.
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These routines are used by both the compression and decompression code. }
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{ Source: jerror.c; Copyright (C) 1991-1996, Thomas G. Lane. }
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{ note: format_message still contains a hack }
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interface
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{$I imjconfig.inc}
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uses
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imjmorecfg,
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imjdeferr,
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imjpeglib;
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{
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jversion;
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}
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const
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EXIT_FAILURE = 1; { define halt() codes if not provided }
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{GLOBAL}
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function jpeg_std_error (var err : jpeg_error_mgr) : jpeg_error_mgr_ptr;
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procedure ERREXIT(cinfo : j_common_ptr; code : J_MESSAGE_CODE);
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procedure ERREXIT1(cinfo : j_common_ptr; code : J_MESSAGE_CODE; p1 : uInt);
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procedure ERREXIT2(cinfo : j_common_ptr; code : J_MESSAGE_CODE; p1 : int; p2 : int);
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procedure ERREXIT3(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int);
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procedure ERREXIT4(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int);
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procedure ERREXITS(cinfo : j_common_ptr;code : J_MESSAGE_CODE;
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str : string);
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{ Nonfatal errors (we can keep going, but the data is probably corrupt) }
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procedure WARNMS(cinfo : j_common_ptr; code : J_MESSAGE_CODE);
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procedure WARNMS1(cinfo : j_common_ptr;code : J_MESSAGE_CODE; p1 : int);
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procedure WARNMS2(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int);
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{ Informational/debugging messages }
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procedure TRACEMS(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE);
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procedure TRACEMS1(cinfo : j_common_ptr; lvl : int;
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code : J_MESSAGE_CODE; p1 : long);
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procedure TRACEMS2(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int;
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p2 : int);
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procedure TRACEMS3(cinfo : j_common_ptr;
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lvl : int;
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code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int);
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procedure TRACEMS4(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int);
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procedure TRACEMS5(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int; p5 : int);
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procedure TRACEMS8(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int;
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p5 : int; p6 : int; p7 : int; p8 : int);
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procedure TRACEMSS(cinfo : j_common_ptr; lvl : int;
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code : J_MESSAGE_CODE; str : string);
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implementation
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{ How to format a message string, in format_message() ? }
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{$IFDEF OS2}
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{$DEFINE NO_FORMAT}
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{$ENDIF}
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{$IFDEF FPC}
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{$DEFINE NO_FORMAT}
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{$ENDIF}
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uses
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{$IFNDEF NO_FORMAT}
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{$IFDEF VER70}
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drivers, { Turbo Vision unit with FormatStr }
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{$ELSE}
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sysutils, { Delphi Unit with Format() }
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{$ENDIF}
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{$ENDIF}
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imjcomapi;
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{ Error exit handler: must not return to caller.
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Applications may override this if they want to get control back after
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an error. Typically one would longjmp somewhere instead of exiting.
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The setjmp buffer can be made a private field within an expanded error
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handler object. Note that the info needed to generate an error message
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is stored in the error object, so you can generate the message now or
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later, at your convenience.
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You should make sure that the JPEG object is cleaned up (with jpeg_abort
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or jpeg_destroy) at some point. }
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{METHODDEF}
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procedure error_exit (cinfo : j_common_ptr);
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begin
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{ Always display the message }
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cinfo^.err^.output_message(cinfo);
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{ Let the memory manager delete any temp files before we die }
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jpeg_destroy(cinfo);
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halt(EXIT_FAILURE);
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end;
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{ Actual output of an error or trace message.
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Applications may override this method to send JPEG messages somewhere
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other than stderr. }
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{ Macros to simplify using the error and trace message stuff }
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{ The first parameter is either type of cinfo pointer }
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{ Fatal errors (print message and exit) }
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procedure ERREXIT(cinfo : j_common_ptr; code : J_MESSAGE_CODE);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.error_exit(cinfo);
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end;
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procedure ERREXIT1(cinfo : j_common_ptr; code : J_MESSAGE_CODE; p1 : uInt);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.error_exit (cinfo);
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end;
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procedure ERREXIT2(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.msg_parm.i[1] := p2;
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cinfo^.err^.error_exit (cinfo);
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end;
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procedure ERREXIT3(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.msg_parm.i[1] := p2;
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cinfo^.err^.msg_parm.i[2] := p3;
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cinfo^.err^.error_exit (cinfo);
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end;
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procedure ERREXIT4(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.msg_parm.i[1] := p2;
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cinfo^.err^.msg_parm.i[2] := p3;
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cinfo^.err^.msg_parm.i[3] := p4;
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cinfo^.err^.error_exit (cinfo);
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end;
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procedure ERREXITS(cinfo : j_common_ptr;code : J_MESSAGE_CODE;
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str : string);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.s := str; { string[JMSG_STR_PARM_MAX] }
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cinfo^.err^.error_exit (cinfo);
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end;
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{ Nonfatal errors (we can keep going, but the data is probably corrupt) }
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procedure WARNMS(cinfo : j_common_ptr; code : J_MESSAGE_CODE);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message(cinfo, -1);
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end;
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procedure WARNMS1(cinfo : j_common_ptr;code : J_MESSAGE_CODE; p1 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.emit_message (cinfo, -1);
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end;
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procedure WARNMS2(cinfo : j_common_ptr; code : J_MESSAGE_CODE;
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p1 : int; p2 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.msg_parm.i[1] := p2;
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cinfo^.err^.emit_message (cinfo, -1);
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end;
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{ Informational/debugging messages }
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procedure TRACEMS(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message(cinfo, lvl);
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end;
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procedure TRACEMS1(cinfo : j_common_ptr; lvl : int;
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code : J_MESSAGE_CODE; p1 : long);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMS2(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int;
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p2 : int);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.i[0] := p1;
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cinfo^.err^.msg_parm.i[1] := p2;
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMS3(cinfo : j_common_ptr;
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lvl : int;
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code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int);
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var
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_mp : int8array;
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begin
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_mp[0] := p1; _mp[1] := p2; _mp[2] := p3;
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cinfo^.err^.msg_parm.i := _mp;
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMS4(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int);
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var
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_mp : int8array;
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begin
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_mp[0] := p1; _mp[1] := p2; _mp[2] := p3; _mp[3] := p4;
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cinfo^.err^.msg_parm.i := _mp;
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMS5(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int; p5 : int);
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var
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_mp : ^int8array;
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begin
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_mp := @cinfo^.err^.msg_parm.i;
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_mp^[0] := p1; _mp^[1] := p2; _mp^[2] := p3;
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_mp^[3] := p4; _mp^[5] := p5;
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMS8(cinfo : j_common_ptr; lvl : int; code : J_MESSAGE_CODE;
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p1 : int; p2 : int; p3 : int; p4 : int;
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p5 : int; p6 : int; p7 : int; p8 : int);
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var
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_mp : int8array;
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begin
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_mp[0] := p1; _mp[1] := p2; _mp[2] := p3; _mp[3] := p4;
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_mp[4] := p5; _mp[5] := p6; _mp[6] := p7; _mp[7] := p8;
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cinfo^.err^.msg_parm.i := _mp;
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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procedure TRACEMSS(cinfo : j_common_ptr; lvl : int;
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code : J_MESSAGE_CODE; str : string);
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begin
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cinfo^.err^.msg_code := ord(code);
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cinfo^.err^.msg_parm.s := str; { string JMSG_STR_PARM_MAX }
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cinfo^.err^.emit_message (cinfo, lvl);
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end;
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{METHODDEF}
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procedure output_message (cinfo : j_common_ptr);
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var
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buffer : string; {[JMSG_LENGTH_MAX];}
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begin
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{ Create the message }
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cinfo^.err^.format_message (cinfo, buffer);
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{ Send it to stderr, adding a newline }
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WriteLn(output, buffer);
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end;
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{ Decide whether to emit a trace or warning message.
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msg_level is one of:
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-1: recoverable corrupt-data warning, may want to abort.
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0: important advisory messages (always display to user).
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1: first level of tracing detail.
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2,3,...: successively more detailed tracing messages.
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An application might override this method if it wanted to abort on warnings
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or change the policy about which messages to display. }
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{METHODDEF}
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procedure emit_message (cinfo : j_common_ptr; msg_level : int);
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var
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err : jpeg_error_mgr_ptr;
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begin
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err := cinfo^.err;
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if (msg_level < 0) then
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begin
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{ It's a warning message. Since corrupt files may generate many warnings,
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the policy implemented here is to show only the first warning,
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unless trace_level >= 3. }
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if (err^.num_warnings = 0) or (err^.trace_level >= 3) then
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err^.output_message(cinfo);
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{ Always count warnings in num_warnings. }
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Inc( err^.num_warnings );
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end
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else
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begin
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{ It's a trace message. Show it if trace_level >= msg_level. }
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if (err^.trace_level >= msg_level) then
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err^.output_message (cinfo);
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end;
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end;
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{ Format a message string for the most recent JPEG error or message.
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The message is stored into buffer, which should be at least JMSG_LENGTH_MAX
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characters. Note that no '\n' character is added to the string.
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Few applications should need to override this method. }
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{METHODDEF}
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|
|
procedure format_message (cinfo : j_common_ptr; var buffer : string);
|
||
|
|
var
|
||
|
|
err : jpeg_error_mgr_ptr;
|
||
|
|
msg_code : J_MESSAGE_CODE;
|
||
|
|
msgtext : string;
|
||
|
|
isstring : boolean;
|
||
|
|
begin
|
||
|
|
err := cinfo^.err;
|
||
|
|
msg_code := J_MESSAGE_CODE(err^.msg_code);
|
||
|
|
msgtext := '';
|
||
|
|
|
||
|
|
{ Look up message string in proper table }
|
||
|
|
if (msg_code > JMSG_NOMESSAGE)
|
||
|
|
and (msg_code <= J_MESSAGE_CODE(err^.last_jpeg_message)) then
|
||
|
|
begin
|
||
|
|
msgtext := err^.jpeg_message_table^[msg_code];
|
||
|
|
end
|
||
|
|
else
|
||
|
|
if (err^.addon_message_table <> NIL) and
|
||
|
|
(msg_code >= err^.first_addon_message) and
|
||
|
|
(msg_code <= err^.last_addon_message) then
|
||
|
|
begin
|
||
|
|
msgtext := err^.addon_message_table^[J_MESSAGE_CODE
|
||
|
|
(ord(msg_code) - ord(err^.first_addon_message))];
|
||
|
|
end;
|
||
|
|
|
||
|
|
{ Defend against bogus message number }
|
||
|
|
if (msgtext = '') then
|
||
|
|
begin
|
||
|
|
err^.msg_parm.i[0] := int(msg_code);
|
||
|
|
msgtext := err^.jpeg_message_table^[JMSG_NOMESSAGE];
|
||
|
|
end;
|
||
|
|
|
||
|
|
{ Check for string parameter, as indicated by %s in the message text }
|
||
|
|
isstring := Pos('%s', msgtext) > 0;
|
||
|
|
|
||
|
|
{ Format the message into the passed buffer }
|
||
|
|
if (isstring) then
|
||
|
|
buffer := Concat(msgtext, err^.msg_parm.s)
|
||
|
|
else
|
||
|
|
begin
|
||
|
|
{$IFDEF VER70}
|
||
|
|
FormatStr(buffer, msgtext, err^.msg_parm.i);
|
||
|
|
{$ELSE}
|
||
|
|
{$IFDEF NO_FORMAT}
|
||
|
|
buffer := msgtext;
|
||
|
|
{$ELSE}
|
||
|
|
buffer := Format(msgtext, [
|
||
|
|
err^.msg_parm.i[0], err^.msg_parm.i[1],
|
||
|
|
err^.msg_parm.i[2], err^.msg_parm.i[3],
|
||
|
|
err^.msg_parm.i[4], err^.msg_parm.i[5],
|
||
|
|
err^.msg_parm.i[6], err^.msg_parm.i[7] ]);
|
||
|
|
{$ENDIF}
|
||
|
|
{$ENDIF}
|
||
|
|
end;
|
||
|
|
end;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
{ Reset error state variables at start of a new image.
|
||
|
|
This is called during compression startup to reset trace/error
|
||
|
|
processing to default state, without losing any application-specific
|
||
|
|
method pointers. An application might possibly want to override
|
||
|
|
this method if it has additional error processing state. }
|
||
|
|
|
||
|
|
|
||
|
|
{METHODDEF}
|
||
|
|
procedure reset_error_mgr (cinfo : j_common_ptr);
|
||
|
|
begin
|
||
|
|
cinfo^.err^.num_warnings := 0;
|
||
|
|
{ trace_level is not reset since it is an application-supplied parameter }
|
||
|
|
cinfo^.err^.msg_code := 0; { may be useful as a flag for "no error" }
|
||
|
|
end;
|
||
|
|
|
||
|
|
|
||
|
|
{ Fill in the standard error-handling methods in a jpeg_error_mgr object.
|
||
|
|
Typical call is:
|
||
|
|
cinfo : jpeg_compress_struct;
|
||
|
|
err : jpeg_error_mgr;
|
||
|
|
|
||
|
|
cinfo.err := jpeg_std_error(@err);
|
||
|
|
after which the application may override some of the methods. }
|
||
|
|
|
||
|
|
|
||
|
|
{GLOBAL}
|
||
|
|
function jpeg_std_error (var err : jpeg_error_mgr) : jpeg_error_mgr_ptr;
|
||
|
|
begin
|
||
|
|
err.error_exit := error_exit;
|
||
|
|
err.emit_message := emit_message;
|
||
|
|
err.output_message := output_message;
|
||
|
|
err.format_message := format_message;
|
||
|
|
err.reset_error_mgr := reset_error_mgr;
|
||
|
|
|
||
|
|
err.trace_level := 0; { default := no tracing }
|
||
|
|
err.num_warnings := 0; { no warnings emitted yet }
|
||
|
|
err.msg_code := 0; { may be useful as a flag for "no error" }
|
||
|
|
|
||
|
|
{ Initialize message table pointers }
|
||
|
|
err.jpeg_message_table := @jpeg_std_message_table;
|
||
|
|
err.last_jpeg_message := pred(JMSG_LASTMSGCODE);
|
||
|
|
|
||
|
|
err.addon_message_table := NIL;
|
||
|
|
err.first_addon_message := JMSG_NOMESSAGE; { for safety }
|
||
|
|
err.last_addon_message := JMSG_NOMESSAGE;
|
||
|
|
|
||
|
|
jpeg_std_error := @err;
|
||
|
|
end;
|
||
|
|
|
||
|
|
|
||
|
|
end.
|