/**************************************************************************
 *
 *  Licensed Materials - Property of IBM and/or HCL
 *
 *  IBM Informix Dynamic Server
 *  Copyright IBM Corporation 1996, 2016
 *  (c) Copyright HCL Technologies Ltd. 2017.  All Rights Reserved.
 *
 ******************************************************************************
 */

#include <stdarg.h>

/*
 * TRACING MODES OR FLAGS:
 * With heavy tracing there are 3 functions that the programmer uses:
 * log entries tat go to the log and trace file
 * error entries that go to the log and trace files
 * trace entries that go to the trace file only
 * trace entries can have a priority that allows us to filter lower priorities
 * trace entries also can be filtered by component if components are set
 */
typedef enum
    {
    HT_MODE_TIME        = 0x00000001,       /* Add timestamp at beggining of line   */
    HT_MODE_MTIME       = 0x00000002,       /* Use microseonds for tracing          */
    HT_MODE_HEADER      = 0x00000004,       /* Add header to the begginign of line  */
    HT_MODE_INDENT      = 0x00000008,       /* Indent on Function Enter             */
    HT_MODE_MICRO       = 0x00000010,       /* Typical install                      */
    HT_MODE_COMPONENT   = 0x00000020,       /* Use components to trace              */
    HT_MODE_TRACEPID    = 0x00000040,
    HT_MODE_STDOUT_DUP  = 0x00000080,       /* Writes the log file to STDOUT        */
    HT_MODE_ALL_VALID   = 0x000000FF
    } HT_MODE;

typedef enum
    {
    HT_DEBUG0           =   0x00,
    HT_DEBUG1           =   0x01,
    HT_DEBUG2           =   0x02,
    HT_DEBUG3           =   0x03,
    HT_DEBUG4           =   0x04,
    HT_DEBUG5           =   0x05,
    HT_DEBUG6           =   0x06,
    HT_DEBUG7           =   0x07,
    HT_DEBUG8           =   0x08,
    HT_DEBUG9           =   0x09
    } HT_DLEVEL;

typedef enum
    {
    HT_E_NOERROR        =       0,
    HT_E_BAD_MAGIC      =   10000,
    HT_E_CANT_OPEN,
    HT_E_NOMEM,
    HT_E_BAD_PARAMS,
    HT_E_BAD_FLAGS,
    HT_E_ALREADY_INIT,
    HT_E_NOT_INIT
    } HT_E_CODE;

typedef enum
    {
    HT_FD_LOG  = 1,
    HT_FD_DBG  = 2
    } HT_LOG_TYPE;

/* To avoid write __LINE__, __FILE__ all the time, then define the following */
#define     HT_SEV_01    HT_DEBUG1,__FILE__,__LINE__
#define     HT_SEV_02    HT_DEBUG2,__FILE__,__LINE__
#define     HT_SEV_03    HT_DEBUG3,__FILE__,__LINE__
#define     HT_SEV_04    HT_DEBUG4,__FILE__,__LINE__
#define     HT_SEV_05    HT_DEBUG5,__FILE__,__LINE__
#define     HT_SEV_06    HT_DEBUG6,__FILE__,__LINE__
#define     HT_SEV_07    HT_DEBUG7,__FILE__,__LINE__
#define     HT_SEV_08    HT_DEBUG8,__FILE__,__LINE__
#define     HT_SEV_09    HT_DEBUG9,__FILE__,__LINE__

#define TRACE_PATHSIZE                  256
#define TRACE_MAX_DATE_LEN		27	/* maximum lengths */
#define TRACE_NOMS_DATE			20	/* date without microseconds */
#define TRACE_MAX_MSG_LEN		10240
#define TRACE_MAX_MSG_NUMBER	9	        /* max number of formats in
						 * message */
#define TRACE_BAD_FD			-1	/* opening trace file failed */

#ifdef NT
typedef mlong fhandle;
#else
typedef mint fhandle;
#endif /* NT */

typedef int4 severity;



typedef struct
    {
    uint4       ht_flags;                       /* tracing flags                */
    char        ht_lfn[TRACE_PATHSIZE + 1];     /* log file name                */
    fhandle     ht_lfd;			        /* log file descriptor          */
    char        ht_dfn[TRACE_PATHSIZE + 1];     /* debug file name              */
    fhandle     ht_dfd;			        /* debug file descriptor        */
    HT_DLEVEL   ht_sev;			        /* debug trace level            */
    char        ht_header[256];                 /* header for each line         */
    char        is_locked;		        /* is file locked?              */
    } trace_file;


#if defined(NT)

#if !defined(EXPORT)
#ifdef DLL
#define EXPORT __declspec(dllexport)
#else       /*          DLL     */
#define EXPORT __declspec(dllimport)
#endif      /*          DLL     */
#endif      /*      EXPORT      */

#if !defined(STDCALL)
#define STDCALL __stdcall
#endif

#else   /*      NT      */

#if !defined(EXPORT)
#define EXPORT extern
#endif

#if !defined(STDCALL)
#define STDCALL
#endif

#endif  /*      NT      */

EXPORT void STDCALL
htenter     (int      severity,
             char    *file_name,
             int      line_number,
             char    *funcname
             );

EXPORT int STDCALL
htexit      (int      severity,
             char    *file_name,
             int      line_number,
             int      rc
             );

void
htrace(
        int      severity,
        char    *file_name,
        int      line_number,
        char    *format,
        ...
        );

void
writelog(
        char    *format,
        ...
        );

EXPORT void STDCALL
heavytrace  (HT_LOG_TYPE     dest,
             char           *fname,
             int             lnum,
             int             is_variable,
             char           *format,
             va_list         var_args
             );

HT_E_CODE
ht_trace_start(
            char        *log_fn,        /*  IN: log file name                   */
            char        *dbg_fn,        /*  IN: debug file name                 */
            HT_DLEVEL    severity,      /*  IN: severity threshold for debug    */
            int          flags,         /*  IN: Flags for tracing               */
            char        *header_str     /*  IN: string to add to all messages   */
            );