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#ifndef DDEBUG_H
#define DDEBUG_H

#include <ngx_core.h>

#if defined(DDEBUG) && (DDEBUG)

# define dd_dump_chain_size() { \
int n; \
ngx_chain_t *cl; \
\
for (n = 0, cl = u->out_bufs; cl; cl = cl->next, n++) { \
} \
\
dd("chain size: %d", n); \
}

# if (NGX_HAVE_VARIADIC_MACROS)

# define dd(...) fprintf(stderr, "drizzle *** %s: ", __func__); \
fprintf(stderr, __VA_ARGS__); \
fprintf(stderr, " at %s line %d.\n", __FILE__, __LINE__)

# else

#include <stdarg.h>
#include <stdio.h>

#include <stdarg.h>

static void dd(const char * fmt, ...) {
}

# endif

#else

# define dd_dump_chain_size()

# if (NGX_HAVE_VARIADIC_MACROS)

# define dd(...)

# else

#include <stdarg.h>

static void dd(const char * fmt, ...) {
}

# endif

#endif

#if defined(DDEBUG) && (DDEBUG)

#define dd_check_read_event_handler(r) \
dd("r->read_event_handler = %s", \
r->read_event_handler == ngx_http_block_reading ? \
"ngx_http_block_reading" : \
r->read_event_handler == ngx_http_test_reading ? \
"ngx_http_test_reading" : \
r->read_event_handler == ngx_http_request_empty_handler ? \
"ngx_http_request_empty_handler" : "UNKNOWN")

#define dd_check_write_event_handler(r) \
dd("r->write_event_handler = %s", \
r->write_event_handler == ngx_http_handler ? \
"ngx_http_handler" : \
r->write_event_handler == ngx_http_core_run_phases ? \
"ngx_http_core_run_phases" : \
r->write_event_handler == ngx_http_request_empty_handler ? \
"ngx_http_request_empty_handler" : "UNKNOWN")

#else

#define dd_check_read_event_handler(r)
#define dd_check_write_event_handler(r)

#endif

#define dd_drizzle_result(result) \
dd("drizzle result: row_count=%" PRId64 "\n" \
" insert_id=%" PRId64 "\n" \
" warning_count=%u\n" \
" column_count=%u\n\n", \
drizzle_result_row_count(result), \
drizzle_result_insert_id(result), \
drizzle_result_warning_count(result), \
drizzle_result_column_count(result))

#define dd_drizzle_column(column) \
dd("drizzle column: catalog=%s\n" \
" db=%s\n" \
" table=%s\n" \
" org_table=%s\n" \
" name=%s\n" \
" org_name=%s\n" \
" charset=%u\n" \
" size=%u\n" \
" max_size=%zu\n" \
" type=%u\n" \
" flags=%u\n\n", \
drizzle_column_catalog(column), drizzle_column_db(column), \
drizzle_column_table(column), drizzle_column_orig_table(column), \
drizzle_column_name(column), drizzle_column_orig_name(column), \
drizzle_column_charset(column), drizzle_column_size(column), \
drizzle_column_max_size(column), drizzle_column_type(column), \
drizzle_column_flags(column));

#endif /* DDEBUG_H */

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