struct jpeg_error_mgr {

   /* Error exit handler: does not return to caller */

   JMETHOD(void, error_exit, (j_common_ptr cinfo));

   /* Conditionally emit a trace or warning message */

   JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));

   /* Routine that actually outputs a trace or error message */

   JMETHOD(void, output_message, (j_common_ptr cinfo));

   /* Format a message string for the most recent JPEG error or message */

   JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));

 #define JMSG_LENGTH_MAX  200    /* recommended size of format_message buffer */

   /* Reset error state variables at start of a new image */

   JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));

   /* The message ID code and any parameters are saved here.

    * A message can have one string parameter or up to 8 int parameters.

    */

   int msg_code;//取之参考http://www.cnblogs.com/black-mamba/p/6754493.html

 #define JMSG_STR_PARM_MAX  80

   union {

     int i[];

     char s[JMSG_STR_PARM_MAX];

   } msg_parm;

   /* Standard state variables for error facility */

   int trace_level;        /* max msg_level that will be displayed */

   /* For recoverable corrupt-data errors, we emit a warning message,

    * but keep going unless emit_message chooses to abort.  emit_message

    * should count warnings in num_warnings.  The surrounding application

    * can check for bad data by seeing if num_warnings is nonzero at the

    * end of processing.

    */

   long num_warnings;        /* number of corrupt-data warnings */

   /* These fields point to the table(s) of error message strings.

    * An application can change the table pointer to switch to a different

    * message list (typically, to change the language in which errors are

    * reported).  Some applications may wish to add additional error codes

    * that will be handled by the JPEG library error mechanism; the second

    * table pointer is used for this purpose.

    *

    * First table includes all errors generated by JPEG library itself.

    * Error code 0 is reserved for a "no such error string" message.

    */

   const char * const * jpeg_message_table; /* Library errors */

   int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */

   /* Second table can be added by application (see cjpeg/djpeg for example).

    * It contains strings numbered first_addon_message..last_addon_message.

    */

   const char * const * addon_message_table; /* Non-library errors */

   int first_addon_message;    /* code for first string in addon table */

   int last_addon_message;    /* code for last string in addon table */

 };

 #define ERREXIT1(cinfo,code,p1)  \

   ((cinfo)->err->msg_code = (code), \

    (cinfo)->err->msg_parm.i[] = (p1), \

    (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))

     cinfo.err = jpeg_std_error(&jerr);

     cinfo.global_state = ;

     (&cinfo)->err->msg_code = (JERR_BAD_STATE);

     (&cinfo)->err->msg_parm.i[] = ((&cinfo)->global_state);

     ((*(&cinfo)->err->error_exit)) ((j_common_ptr) (&cinfo));

     //ERREXIT1(&cinfo, JERR_BAD_STATE, (&cinfo)->global_state);

/* Values of global_state field (jdapi.c has some dependencies on ordering!) */

#define CSTATE_START    100    /* after create_compress */

#define CSTATE_SCANNING    101    /* start_compress done, write_scanlines OK */

#define CSTATE_RAW_OK    102    /* start_compress done, write_raw_data OK */

#define CSTATE_WRCOEFS    103    /* jpeg_write_coefficients done */

#define DSTATE_START    200    /* after create_decompress */

#define DSTATE_INHEADER    201    /* reading header markers, no SOS yet */

#define DSTATE_READY    202    /* found SOS, ready for start_decompress */

#define DSTATE_PRELOAD    203    /* reading multiscan file in start_decompress*/

#define DSTATE_PRESCAN    204    /* performing dummy pass for 2-pass quant */

#define DSTATE_SCANNING    205    /* start_decompress done, read_scanlines OK */

#define DSTATE_RAW_OK    206    /* start_decompress done, read_raw_data OK */

#define DSTATE_BUFIMAGE    207    /* expecting jpeg_start_output */

#define DSTATE_BUFPOST    208    /* looking for SOS/EOI in jpeg_finish_output */

#define DSTATE_RDCOEFS    209    /* reading file in jpeg_read_coefficients */

#define DSTATE_STOPPING    210    /* looking for EOI in jpeg_finish_decompress */