PApp-SQL/SQL.xs

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#if (PERL_VERSION < 5) || ((PERL_VERSION == 5) && (PERL_SUBVERSION <= 6))
# define get_sv      perl_get_sv
# define call_method perl_call_method
# define call_sv     perl_call_sv
#endif

#if (PERL_VERSION < 5) || ((PERL_VERSION == 5) && (PERL_SUBVERSION <= 5))
# define CAN_UTF8 1
#endif

static SV *
sql_upgrade_utf8 (SV *sv)
{
#if CAN_UTF8
  if (SvPOK (sv))
    sv_utf8_upgrade (sv);
#endif
  return sv;
}

static SV *
sql_force_utf8 (SV *sv)
{
#if CAN_UTF8
  if (SvPOK (sv))
    SvUTF8_on (sv);
#endif
  return sv;
}

#define maybe_upgrade_utf8(utf8,sv) ((utf8) ? sql_upgrade_utf8 (sv) : (sv))
#define maybe_force_utf8(utf8,sv)   ((utf8) ? sql_force_utf8   (sv) : (sv))

#define is_dbh(sv) ((sv) && sv_isobject (sv) && sv_derived_from ((sv), "DBI::db"))

typedef struct lru_node {
  struct lru_node *next;
  struct lru_node *prev;
  U32 hash;
  SV *dbh;
  SV *sql;

  SV *sth;
#if 0 /* method cache */
  GV *execute;
  GV *bind_columns;
  GV *fetch;
  GV *finish;
#endif
} lru_node;

static lru_node lru_list;
static int lru_size;
static int lru_maxsize;

#define lru_init lru_list.next = &lru_list; lru_list.prev = &lru_list /* other fields are zero */

/* this is primitive, yet effective */
/* the returned value must never be zero (or bad things will happen) */
#define lru_hash do {   \
        hash = (((U32)dbh)>>2); \
        hash += *statement;\
        hash += len;            \
} while (0)

/* fetch and "use" */
/* could be done using a single call (we could call prepare!) */
static SV *lru_fetch(SV *dbh, SV *sql)
{
  lru_node *n;

  U32 hash;
  STRLEN len;
  char *statement = SvPV (sql, len);

  dbh = SvRV (dbh);

  lru_hash;

  /*fprintf (stderr, "F: %08lx %s\n", hash, SvPV_nolen (sql));/*D*/

  n = &lru_list;
  do {
    n = n->next;
    if (!n->hash)
      return 0;
  } while (n->hash != hash
           || !sv_eq (n->sql, sql)
           || n->dbh != dbh);

  /* found, so return to the start of the list */
  n->prev->next = n->next;
  n->next->prev = n->prev;

  n->next = lru_list.next;
  n->prev = &lru_list;
  lru_list.next->prev = n;
  lru_list.next = n;

  return n->sth;
}

static void lru_nukeone(void)
{
  lru_node *n;
  /* nuke at the end */

  n = lru_list.prev;

  lru_list.prev = n->prev;
  n->prev->next = &lru_list;

  /*fprintf (stderr, "N: %s\n", SvPV_nolen (n->sql));/*D*/

  SvREFCNT_dec (n->dbh);
  SvREFCNT_dec (n->sql);
  SvREFCNT_dec (n->sth);
  Safefree (n);
  
  lru_size--;
}

/* store a not-yet existing entry(!) */
static void lru_store(SV *dbh, SV *sql, SV *sth)
{
  lru_node *n;

  U32 hash;
  STRLEN len;
  char *statement = SvPV (sql, len);

  dbh = SvRV (dbh);

  lru_hash;

  /*fprintf (stderr, "S: %08lx %s\n", hash, SvPV_nolen (sql));/*D*/

  lru_size++;
  if (lru_size > lru_maxsize)
    lru_nukeone ();

  New (0, n, 1, lru_node);

  n->hash = hash;
  n->dbh = dbh; SvREFCNT_inc (dbh); /* note: this is the dbi hash itself, not the reference */
  n->sql = newSVsv (sql);
  n->sth = sth; SvREFCNT_inc (sth);

  n->next = lru_list.next;
  n->prev = &lru_list;
  lru_list.next->prev = n;
  lru_list.next = n;
}

static void lru_cachesize (int size)
{
  if (size >= 0)
    {
      lru_maxsize = size;
      while (lru_size > lru_maxsize)
        lru_nukeone ();
    }
}

static GV *sql_exec;
static GV *DBH;
static SV *sv_prepare, *sv_execute, *sv_bind_columns,
          *sv_fetchrow_arrayref, *sv_fetchall_arrayref,
          *sv_finish;

#define newconstpv(str) newSVpvn ((str), sizeof (str))

MODULE = PApp::SQL              PACKAGE = PApp::SQL

PROTOTYPES: DISABLE

BOOT:
{
   sql_exec = gv_fetchpv ("PApp::SQL::sql_exec", TRUE, SVt_PV);
   DBH      = gv_fetchpv ("PApp::SQL::DBH"     , TRUE, SVt_PV);

   if (!sv_prepare)
     {
       sv_prepare           = newconstpv ("prepare");
       sv_execute           = newconstpv ("execute");
       sv_bind_columns      = newconstpv ("bind_columns");
       sv_fetchrow_arrayref = newconstpv ("fetchrow_arrayref");
       sv_fetchall_arrayref = newconstpv ("fetchall_arrayref");
       sv_finish            = newconstpv ("finish");
     }

   /* apache might BOOT: twice :( */
   if (lru_size)
     lru_cachesize (0);

   lru_init;
   lru_cachesize (50);
}

int
cachesize(size = -1)
        int     size
        CODE:
        RETVAL = lru_maxsize;
        lru_cachesize (size);
        OUTPUT:
        RETVAL

void
sql_exec(...)
        ALIAS:
                sql_uexec     = 1
                sql_fetch     = 2
                sql_ufetch    = 3
                sql_fetchall  = 4
                sql_ufetchall = 5
                sql_exists    = 6
                sql_uexists   = 7
        PPCODE:
{
        if (items == 0)
          croak ("Usage: sql_exec [database-handle,] [bind-var-refs,... ] \"sql-statement\", [arguments, ...]");
        else
          {
            int arg = 0;
            int bind_first, bind_last;
            int count;
            SV *dbh = ST(0);
            SV *sth;
            SV *sql;
            SV *execute;
            STRLEN dc;

            /* save our arguments against destruction through function calls */
            SP += items;
            
            /* first check wether we should use an explicit db handle */
            if (!is_dbh (dbh))
              {
                dbh = get_sv ("DBH", FALSE);
                if (!is_dbh (dbh))
                  {
                    dbh = GvSV(DBH);
                    if (!is_dbh (dbh))
                      croak ("sql_exec: no $DBH found in current package or in PApp::SQL::");
                  }
              }
            else
              arg++; /* we consumed one argument */

            /* count the remaining references (for bind_columns) */
            bind_first = arg;
            while (items > arg && SvROK (ST(arg)))
              arg++;

            bind_last = arg;

            /* consume the sql-statement itself */
            if (items <= arg)
              croak ("sql_exec: required argument \"sql-statement\" missing");

            if (!SvPOK (ST(arg)))
              croak ("sql_exec: sql-statement must be a string");

            sql = ST(arg); arg++;

            if ((ix & ~1) == 6)
              {
                SV *neu = sv_2mortal (newSVpv ("select count(*) > 0 from ", 0));
                sv_catsv (neu, sql);
                sv_catpv (neu, " limit 1");
                sql = neu;
                ix -= 6; /* sql_fetch */
              }

            /* check cache for existing statement handle */
            sth = lru_fetch (dbh, sql);
            if (!sth)
              {
                PUSHMARK (SP);
                EXTEND (SP, 2);
                PUSHs (dbh);
                PUSHs (sql);
                PUTBACK;
                count = call_sv (sv_prepare, G_METHOD | G_SCALAR);
                SPAGAIN;

                if (count != 1)
                  croak ("sql_exec: unable to prepare() statement '%s': %s",
                         SvPV (sql, dc),
                         SvPV (get_sv ("DBI::errstr", TRUE), dc));

                sth = POPs;

                lru_store (dbh, sql, sth);
              }

            PUSHMARK (SP);
            EXTEND (SP, items - arg + 1);
            PUSHs (sth);
            while (items > arg)
              {
                PUSHs (maybe_upgrade_utf8 (ix & 1, ST(arg)));
                arg++;
              }

            PUTBACK;
            /* { static GV *execute;
              if (!execute) execute = gv_fetchmethod_autoload(SvSTASH(SvRV(sth)), "execute", 0);
              count = call_sv(GvCV(execute), G_SCALAR);
             }*/
            count = call_sv (sv_execute, G_METHOD | G_SCALAR);
            SPAGAIN;

            if (count != 1)
              croak ("sql_exec: execute() didn't return any value ('%s'): %s",
                     SvPV (sql, dc),
                     SvPV (get_sv ("DBI::errstr", TRUE), dc));

            execute = POPs;

            if (!SvTRUE (execute))
              croak ("sql_exec: unable to execute statement '%s' (%s)",
                     SvPV (sql, dc),
                     SvPV (get_sv ("DBI::errstr", TRUE), dc));

            sv_setsv (GvSV(sql_exec), execute);

            if (bind_first != bind_last)
              {
                PUSHMARK (SP);
                EXTEND (SP, bind_last - bind_first + 2);
                PUSHs (sth);
                do {
                  PUSHs (ST(bind_first));
                  bind_first++;
                } while (bind_first != bind_last);

                PUTBACK;
                count = call_sv (sv_bind_columns, G_METHOD | G_SCALAR);
                SPAGAIN;

                if (count != 1)
                  croak ("sql_exec: bind_columns() didn't return any value ('%s'): %s",
                         SvPV (sql, dc),
                         SvPV (get_sv ("DBI::errstr", TRUE), dc));

                if (!SvOK (POPs))
                  croak ("sql_exec: bind_columns() didn't return a true ('%s'): %s",
                         SvPV (sql, dc),
                         SvPV (get_sv ("DBI::errstr", TRUE), dc));
              }

            /* free our arguments from the stack */
            SP -= items;

            if ((ix & ~1) == 2)
              { /* sql_fetch */
                SV *row;

                PUSHMARK (SP);
                XPUSHs (sth);
                PUTBACK;
                count = call_sv (sv_fetchrow_arrayref, G_METHOD | G_SCALAR);
                SPAGAIN;

                if (count != 1)
                  abort ();

                row = POPs;

                if (SvROK (row))
                  {
                    AV *av;

                    switch (GIMME_V)
                      {
                        case G_VOID:
                          /* no thing */
                          break;
                        case G_SCALAR:
                          /* the first element */
                          XPUSHs (maybe_force_utf8 (ix & 1, *av_fetch ((AV *)SvRV (row), 0, 1)));
                          break;
                        case G_ARRAY:
                          av = (AV *)SvRV (row);
                          count = AvFILL (av) + 1;
                          EXTEND (SP, count);
                          for (arg = 0; arg < count; arg++)
                            PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));

                          break;
                        default:
                          abort ();
                      }
                 }
              }
            else if ((ix & ~1) == 4)
              { /* sql_fetchall */
                SV *rows;

                PUSHMARK (SP);
                XPUSHs (sth);
                PUTBACK;
                count = call_sv (sv_fetchall_arrayref, G_METHOD | G_SCALAR);
                SPAGAIN;

                if (count != 1)
                  abort ();

                rows = POPs;

                if (SvROK (rows))
                  {
                    AV *av = (AV *)SvRV (rows);
                    count = AvFILL (av) + 1;

                    if (count)
                      {
                        int columns = AvFILL ((AV *) SvRV (AvARRAY (av)[0])) + 1; /* columns? */

                        EXTEND (SP, count);
                        if (columns == 1)
                          for (arg = 0; arg < count; arg++)
                            PUSHs (maybe_force_utf8 (ix & 1, AvARRAY ((AV *)SvRV (AvARRAY (av)[arg]))[0]));
                        else
                          for (arg = 0; arg < count; arg++)
                            PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));
                      }
                 }
              }
            else
              XPUSHs (sth);

            if (ix > 1 || GIMME_V == G_VOID)
              {
                PUSHMARK (SP);
                XPUSHs (sth);
                PUTBACK;
                (void) call_sv (sv_finish, G_METHOD | G_DISCARD);
                SPAGAIN;
              }
          }
}


Revision:	1.6
Committed:	Sun Apr 22 17:03:28 2001 UTC (23 years, 1 month ago) by root
Branch:	MAIN
Changes since 1.5:	+6 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include "EXTERN.h"
2			#include "perl.h"
3			#include "XSUB.h"
4
5	root	1.3	#if (PERL_VERSION < 5) \|\| ((PERL_VERSION == 5) && (PERL_SUBVERSION <= 6))
6	root	1.5	# define get_sv perl_get_sv
7	root	1.3	# define call_method perl_call_method
8	root	1.5	# define call_sv perl_call_sv
9	root	1.3	#endif
10
11	root	1.5	#if (PERL_VERSION < 5) \|\| ((PERL_VERSION == 5) && (PERL_SUBVERSION <= 5))
12			# define CAN_UTF8 1
13			#endif
14
15			static SV *
16			sql_upgrade_utf8 (SV *sv)
17			{
18			#if CAN_UTF8
19			if (SvPOK (sv))
20			sv_utf8_upgrade (sv);
21			#endif
22			return sv;
23			}
24
25			static SV *
26			sql_force_utf8 (SV *sv)
27			{
28			#if CAN_UTF8
29			if (SvPOK (sv))
30			SvUTF8_on (sv);
31			#endif
32			return sv;
33			}
34
35			#define maybe_upgrade_utf8(utf8,sv) ((utf8) ? sql_upgrade_utf8 (sv) : (sv))
36			#define maybe_force_utf8(utf8,sv) ((utf8) ? sql_force_utf8 (sv) : (sv))
37
38	root	1.2	#define is_dbh(sv) ((sv) && sv_isobject (sv) && sv_derived_from ((sv), "DBI::db"))
39	root	1.1
40			typedef struct lru_node {
41			struct lru_node *next;
42			struct lru_node *prev;
43			U32 hash;
44			SV *dbh;
45			SV *sql;
46
47			SV *sth;
48			#if 0 /* method cache */
49			GV *execute;
50			GV *bind_columns;
51			GV *fetch;
52	root	1.5	GV *finish;
53	root	1.1	#endif
54			} lru_node;
55
56			static lru_node lru_list;
57			static int lru_size;
58			static int lru_maxsize;
59
60			#define lru_init lru_list.next = &lru_list; lru_list.prev = &lru_list /* other fields are zero */
61
62			/* this is primitive, yet effective */
63			/* the returned value must never be zero (or bad things will happen) */
64			#define lru_hash do { \
65			hash = (((U32)dbh)>>2); \
66			hash += *statement;\
67			hash += len; \
68			} while (0)
69
70			/* fetch and "use" */
71			/* could be done using a single call (we could call prepare!) */
72			static SV lru_fetch(SV dbh, SV *sql)
73			{
74			lru_node *n;
75
76			U32 hash;
77			STRLEN len;
78			char *statement = SvPV (sql, len);
79
80			dbh = SvRV (dbh);
81
82			lru_hash;
83
84			/fprintf (stderr, "F: %08lx %s\n", hash, SvPV_nolen (sql));/D*/
85
86			n = &lru_list;
87			do {
88			n = n->next;
89			if (!n->hash)
90			return 0;
91			} while (n->hash != hash
92			\|\| !sv_eq (n->sql, sql)
93			\|\| n->dbh != dbh);
94
95			/* found, so return to the start of the list */
96			n->prev->next = n->next;
97			n->next->prev = n->prev;
98
99			n->next = lru_list.next;
100			n->prev = &lru_list;
101			lru_list.next->prev = n;
102			lru_list.next = n;
103
104			return n->sth;
105			}
106
107			static void lru_nukeone(void)
108			{
109			lru_node *n;
110			/* nuke at the end */
111
112			n = lru_list.prev;
113
114			lru_list.prev = n->prev;
115			n->prev->next = &lru_list;
116
117			/fprintf (stderr, "N: %s\n", SvPV_nolen (n->sql));/D*/
118
119			SvREFCNT_dec (n->dbh);
120			SvREFCNT_dec (n->sql);
121			SvREFCNT_dec (n->sth);
122			Safefree (n);
123
124			lru_size--;
125			}
126
127			/* store a not-yet existing entry(!) */
128			static void lru_store(SV dbh, SV sql, SV *sth)
129			{
130			lru_node *n;
131
132			U32 hash;
133			STRLEN len;
134			char *statement = SvPV (sql, len);
135
136			dbh = SvRV (dbh);
137
138			lru_hash;
139
140			/fprintf (stderr, "S: %08lx %s\n", hash, SvPV_nolen (sql));/D*/
141
142			lru_size++;
143			if (lru_size > lru_maxsize)
144			lru_nukeone ();
145
146			New (0, n, 1, lru_node);
147
148			n->hash = hash;
149			n->dbh = dbh; SvREFCNT_inc (dbh); /* note: this is the dbi hash itself, not the reference */
150			n->sql = newSVsv (sql);
151			n->sth = sth; SvREFCNT_inc (sth);
152
153			n->next = lru_list.next;
154			n->prev = &lru_list;
155			lru_list.next->prev = n;
156			lru_list.next = n;
157			}
158
159			static void lru_cachesize (int size)
160			{
161			if (size >= 0)
162			{
163			lru_maxsize = size;
164			while (lru_size > lru_maxsize)
165			lru_nukeone ();
166			}
167			}
168
169			static GV *sql_exec;
170			static GV *DBH;
171	root	1.6	static SV sv_prepare, sv_execute, *sv_bind_columns,
172			sv_fetchrow_arrayref, sv_fetchall_arrayref,
173			*sv_finish;
174	root	1.5
175			#define newconstpv(str) newSVpvn ((str), sizeof (str))
176	root	1.1
177			MODULE = PApp::SQL PACKAGE = PApp::SQL
178
179			PROTOTYPES: DISABLE
180
181			BOOT:
182			{
183			sql_exec = gv_fetchpv ("PApp::SQL::sql_exec", TRUE, SVt_PV);
184			DBH = gv_fetchpv ("PApp::SQL::DBH" , TRUE, SVt_PV);
185
186	root	1.5	if (!sv_prepare)
187			{
188			sv_prepare = newconstpv ("prepare");
189			sv_execute = newconstpv ("execute");
190			sv_bind_columns = newconstpv ("bind_columns");
191			sv_fetchrow_arrayref = newconstpv ("fetchrow_arrayref");
192	root	1.6	sv_fetchall_arrayref = newconstpv ("fetchall_arrayref");
193	root	1.5	sv_finish = newconstpv ("finish");
194			}
195
196	root	1.1	/* apache might BOOT: twice :( */
197			if (lru_size)
198			lru_cachesize (0);
199
200			lru_init;
201			lru_cachesize (50);
202			}
203
204			int
205			cachesize(size = -1)
206			int size
207			CODE:
208			RETVAL = lru_maxsize;
209			lru_cachesize (size);
210			OUTPUT:
211			RETVAL
212
213			void
214			sql_exec(...)
215			ALIAS:
216	root	1.5	sql_uexec = 1
217			sql_fetch = 2
218			sql_ufetch = 3
219			sql_fetchall = 4
220			sql_ufetchall = 5
221			sql_exists = 6
222			sql_uexists = 7
223	root	1.1	PPCODE:
224			{
225			if (items == 0)
226			croak ("Usage: sql_exec [database-handle,] [bind-var-refs,... ] \"sql-statement\", [arguments, ...]");
227			else
228			{
229			int arg = 0;
230			int bind_first, bind_last;
231			int count;
232			SV *dbh = ST(0);
233			SV *sth;
234			SV *sql;
235			SV *execute;
236	root	1.3	STRLEN dc;
237	root	1.1
238			/* save our arguments against destruction through function calls */
239			SP += items;
240
241			/* first check wether we should use an explicit db handle */
242			if (!is_dbh (dbh))
243			{
244			dbh = get_sv ("DBH", FALSE);
245			if (!is_dbh (dbh))
246			{
247			dbh = GvSV(DBH);
248			if (!is_dbh (dbh))
249			croak ("sql_exec: no $DBH found in current package or in PApp::SQL::");
250			}
251			}
252			else
253			arg++; /* we consumed one argument */
254
255			/* count the remaining references (for bind_columns) */
256			bind_first = arg;
257			while (items > arg && SvROK (ST(arg)))
258			arg++;
259
260			bind_last = arg;
261
262			/* consume the sql-statement itself */
263			if (items <= arg)
264			croak ("sql_exec: required argument \"sql-statement\" missing");
265
266			if (!SvPOK (ST(arg)))
267			croak ("sql_exec: sql-statement must be a string");
268
269			sql = ST(arg); arg++;
270
271	root	1.5	if ((ix & ~1) == 6)
272	root	1.1	{
273			SV neu = sv_2mortal (newSVpv ("select count() > 0 from ", 0));
274			sv_catsv (neu, sql);
275			sv_catpv (neu, " limit 1");
276			sql = neu;
277	root	1.5	ix -= 6; /* sql_fetch */
278	root	1.1	}
279
280	root	1.4	/* check cache for existing statement handle */
281	root	1.1	sth = lru_fetch (dbh, sql);
282			if (!sth)
283			{
284			PUSHMARK (SP);
285			EXTEND (SP, 2);
286			PUSHs (dbh);
287			PUSHs (sql);
288			PUTBACK;
289	root	1.5	count = call_sv (sv_prepare, G_METHOD \| G_SCALAR);
290	root	1.1	SPAGAIN;
291
292			if (count != 1)
293			croak ("sql_exec: unable to prepare() statement '%s': %s",
294	root	1.3	SvPV (sql, dc),
295			SvPV (get_sv ("DBI::errstr", TRUE), dc));
296	root	1.1
297			sth = POPs;
298
299			lru_store (dbh, sql, sth);
300			}
301
302			PUSHMARK (SP);
303			EXTEND (SP, items - arg + 1);
304			PUSHs (sth);
305			while (items > arg)
306			{
307	root	1.5	PUSHs (maybe_upgrade_utf8 (ix & 1, ST(arg)));
308	root	1.1	arg++;
309			}
310
311			PUTBACK;
312			/* { static GV *execute;
313			if (!execute) execute = gv_fetchmethod_autoload(SvSTASH(SvRV(sth)), "execute", 0);
314			count = call_sv(GvCV(execute), G_SCALAR);
315			}*/
316	root	1.5	count = call_sv (sv_execute, G_METHOD \| G_SCALAR);
317	root	1.1	SPAGAIN;
318
319			if (count != 1)
320			croak ("sql_exec: execute() didn't return any value ('%s'): %s",
321	root	1.3	SvPV (sql, dc),
322			SvPV (get_sv ("DBI::errstr", TRUE), dc));
323	root	1.1
324			execute = POPs;
325
326			if (!SvTRUE (execute))
327			croak ("sql_exec: unable to execute statement '%s' (%s)",
328	root	1.3	SvPV (sql, dc),
329			SvPV (get_sv ("DBI::errstr", TRUE), dc));
330	root	1.1
331			sv_setsv (GvSV(sql_exec), execute);
332
333			if (bind_first != bind_last)
334			{
335			PUSHMARK (SP);
336			EXTEND (SP, bind_last - bind_first + 2);
337			PUSHs (sth);
338			do {
339			PUSHs (ST(bind_first));
340			bind_first++;
341			} while (bind_first != bind_last);
342
343			PUTBACK;
344	root	1.5	count = call_sv (sv_bind_columns, G_METHOD \| G_SCALAR);
345	root	1.1	SPAGAIN;
346
347			if (count != 1)
348			croak ("sql_exec: bind_columns() didn't return any value ('%s'): %s",
349	root	1.3	SvPV (sql, dc),
350			SvPV (get_sv ("DBI::errstr", TRUE), dc));
351	root	1.1
352			if (!SvOK (POPs))
353			croak ("sql_exec: bind_columns() didn't return a true ('%s'): %s",
354	root	1.3	SvPV (sql, dc),
355			SvPV (get_sv ("DBI::errstr", TRUE), dc));
356	root	1.1	}
357
358			/* free our arguments from the stack */
359			SP -= items;
360
361	root	1.5	if ((ix & ~1) == 2)
362	root	1.1	{ /* sql_fetch */
363			SV *row;
364
365			PUSHMARK (SP);
366			XPUSHs (sth);
367			PUTBACK;
368	root	1.5	count = call_sv (sv_fetchrow_arrayref, G_METHOD \| G_SCALAR);
369	root	1.1	SPAGAIN;
370
371			if (count != 1)
372			abort ();
373
374			row = POPs;
375
376			if (SvROK (row))
377			{
378			AV *av;
379
380			switch (GIMME_V)
381			{
382			case G_VOID:
383			/* no thing */
384			break;
385			case G_SCALAR:
386			/* the first element */
387	root	1.5	XPUSHs (maybe_force_utf8 (ix & 1, av_fetch ((AV )SvRV (row), 0, 1)));
388	root	1.1	break;
389			case G_ARRAY:
390			av = (AV *)SvRV (row);
391			count = AvFILL (av) + 1;
392			EXTEND (SP, count);
393			for (arg = 0; arg < count; arg++)
394	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));
395	root	1.1
396			break;
397			default:
398			abort ();
399			}
400			}
401			}
402	root	1.5	else if ((ix & ~1) == 4)
403	root	1.1	{ /* sql_fetchall */
404			SV *rows;
405
406			PUSHMARK (SP);
407			XPUSHs (sth);
408			PUTBACK;
409	root	1.6	count = call_sv (sv_fetchall_arrayref, G_METHOD \| G_SCALAR);
410	root	1.1	SPAGAIN;
411
412			if (count != 1)
413			abort ();
414
415			rows = POPs;
416
417			if (SvROK (rows))
418			{
419			AV av = (AV )SvRV (rows);
420			count = AvFILL (av) + 1;
421
422			if (count)
423			{
424	root	1.6	int columns = AvFILL ((AV ) SvRV (AvARRAY (av)[0])) + 1; / columns? */
425	root	1.1
426			EXTEND (SP, count);
427			if (columns == 1)
428			for (arg = 0; arg < count; arg++)
429	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY ((AV *)SvRV (AvARRAY (av)[arg]))[0]));
430	root	1.1	else
431			for (arg = 0; arg < count; arg++)
432	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));
433	root	1.1	}
434			}
435			}
436			else
437			XPUSHs (sth);
438
439	root	1.5	if (ix > 1 \|\| GIMME_V == G_VOID)
440	root	1.1	{
441			PUSHMARK (SP);
442			XPUSHs (sth);
443			PUTBACK;
444	root	1.5	(void) call_sv (sv_finish, G_METHOD \| G_DISCARD);
445	root	1.1	SPAGAIN;
446			}
447			}
448			}
449
450
451