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 >= 6))
# 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;

  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;

  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;

  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, dd; /* dummy */

            /* save our arguments against destruction through function calls */
            SP += items;
            
            /* first check wether we should use an explicit db handle */
            if (!is_dbh (dbh))
              {
                /* the next line doesn't work - check why later maybe */
                /* dbh = get_sv ("DBH", FALSE);
                if (!is_dbh (dbh))
                  {*/
                    dbh = GvSV(DBH);
                    if (!is_dbh (dbh))
                      croak ("sql_exec: no $DBH argument and no fallback in $PApp::SQL::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 -= 4; /* 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), dd));

                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), dd));

            execute = POPs;

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

            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), dd));

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

            /* 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:	1.12
Committed:	Thu Apr 11 01:02:10 2002 UTC (22 years, 1 month ago) by root
Branch:	MAIN
CVS Tags:	klinik-loewenstein-05052002, klinik-loewenstein
Changes since 1.11:	+6 -4 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	1.11	#if (PERL_VERSION > 5) \|\| ((PERL_VERSION == 5) && (PERL_SUBVERSION >= 6))
12	root	1.5	# 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			n = &lru_list;
85			do {
86			n = n->next;
87			if (!n->hash)
88			return 0;
89			} while (n->hash != hash
90			\|\| !sv_eq (n->sql, sql)
91			\|\| n->dbh != dbh);
92
93			/* found, so return to the start of the list */
94			n->prev->next = n->next;
95			n->next->prev = n->prev;
96
97			n->next = lru_list.next;
98			n->prev = &lru_list;
99			lru_list.next->prev = n;
100			lru_list.next = n;
101
102			return n->sth;
103			}
104
105			static void lru_nukeone(void)
106			{
107			lru_node *n;
108			/* nuke at the end */
109
110			n = lru_list.prev;
111
112			lru_list.prev = n->prev;
113			n->prev->next = &lru_list;
114
115			SvREFCNT_dec (n->dbh);
116			SvREFCNT_dec (n->sql);
117			SvREFCNT_dec (n->sth);
118			Safefree (n);
119
120			lru_size--;
121			}
122
123			/* store a not-yet existing entry(!) */
124			static void lru_store(SV dbh, SV sql, SV *sth)
125			{
126			lru_node *n;
127
128			U32 hash;
129			STRLEN len;
130			char *statement = SvPV (sql, len);
131
132			dbh = SvRV (dbh);
133
134			lru_hash;
135
136			lru_size++;
137			if (lru_size > lru_maxsize)
138			lru_nukeone ();
139
140			New (0, n, 1, lru_node);
141
142			n->hash = hash;
143			n->dbh = dbh; SvREFCNT_inc (dbh); /* note: this is the dbi hash itself, not the reference */
144			n->sql = newSVsv (sql);
145			n->sth = sth; SvREFCNT_inc (sth);
146
147			n->next = lru_list.next;
148			n->prev = &lru_list;
149			lru_list.next->prev = n;
150			lru_list.next = n;
151			}
152
153			static void lru_cachesize (int size)
154			{
155			if (size >= 0)
156			{
157			lru_maxsize = size;
158			while (lru_size > lru_maxsize)
159			lru_nukeone ();
160			}
161			}
162
163			static GV *sql_exec;
164			static GV *DBH;
165	root	1.6	static SV sv_prepare, sv_execute, *sv_bind_columns,
166			sv_fetchrow_arrayref, sv_fetchall_arrayref,
167			*sv_finish;
168	root	1.5
169			#define newconstpv(str) newSVpvn ((str), sizeof (str))
170	root	1.1
171			MODULE = PApp::SQL PACKAGE = PApp::SQL
172
173			PROTOTYPES: DISABLE
174
175			BOOT:
176			{
177			sql_exec = gv_fetchpv ("PApp::SQL::sql_exec", TRUE, SVt_PV);
178			DBH = gv_fetchpv ("PApp::SQL::DBH" , TRUE, SVt_PV);
179
180	root	1.5	if (!sv_prepare)
181			{
182			sv_prepare = newconstpv ("prepare");
183			sv_execute = newconstpv ("execute");
184			sv_bind_columns = newconstpv ("bind_columns");
185			sv_fetchrow_arrayref = newconstpv ("fetchrow_arrayref");
186	root	1.6	sv_fetchall_arrayref = newconstpv ("fetchall_arrayref");
187	root	1.5	sv_finish = newconstpv ("finish");
188			}
189
190	root	1.1	/* apache might BOOT: twice :( */
191			if (lru_size)
192			lru_cachesize (0);
193
194			lru_init;
195			lru_cachesize (50);
196			}
197
198			int
199			cachesize(size = -1)
200			int size
201			CODE:
202			RETVAL = lru_maxsize;
203			lru_cachesize (size);
204			OUTPUT:
205			RETVAL
206
207			void
208			sql_exec(...)
209			ALIAS:
210	root	1.5	sql_uexec = 1
211			sql_fetch = 2
212			sql_ufetch = 3
213			sql_fetchall = 4
214			sql_ufetchall = 5
215			sql_exists = 6
216			sql_uexists = 7
217	root	1.1	PPCODE:
218			{
219			if (items == 0)
220			croak ("Usage: sql_exec [database-handle,] [bind-var-refs,... ] \"sql-statement\", [arguments, ...]");
221			else
222			{
223			int arg = 0;
224			int bind_first, bind_last;
225			int count;
226			SV *dbh = ST(0);
227			SV *sth;
228			SV *sql;
229			SV *execute;
230	root	1.9	STRLEN dc, dd; /* dummy */
231	root	1.1
232			/* save our arguments against destruction through function calls */
233			SP += items;
234
235			/* first check wether we should use an explicit db handle */
236			if (!is_dbh (dbh))
237			{
238	root	1.12	/* the next line doesn't work - check why later maybe */
239			/* dbh = get_sv ("DBH", FALSE);
240	root	1.1	if (!is_dbh (dbh))
241	root	1.12	{*/
242	root	1.1	dbh = GvSV(DBH);
243			if (!is_dbh (dbh))
244	root	1.12	croak ("sql_exec: no $DBH argument and no fallback in $PApp::SQL::DBH");
245			/*croak ("sql_exec: no $DBH found in current package or in PApp::SQL::");
246			}*/
247	root	1.1	}
248			else
249			arg++; /* we consumed one argument */
250
251			/* count the remaining references (for bind_columns) */
252			bind_first = arg;
253			while (items > arg && SvROK (ST(arg)))
254			arg++;
255
256			bind_last = arg;
257
258			/* consume the sql-statement itself */
259			if (items <= arg)
260			croak ("sql_exec: required argument \"sql-statement\" missing");
261
262			if (!SvPOK (ST(arg)))
263			croak ("sql_exec: sql-statement must be a string");
264
265			sql = ST(arg); arg++;
266
267	root	1.5	if ((ix & ~1) == 6)
268	root	1.1	{
269			SV neu = sv_2mortal (newSVpv ("select count() > 0 from ", 0));
270			sv_catsv (neu, sql);
271			sv_catpv (neu, " limit 1");
272			sql = neu;
273	root	1.7	ix -= 4; /* sql_fetch */
274	root	1.1	}
275
276	root	1.4	/* check cache for existing statement handle */
277	root	1.1	sth = lru_fetch (dbh, sql);
278			if (!sth)
279			{
280			PUSHMARK (SP);
281			EXTEND (SP, 2);
282			PUSHs (dbh);
283			PUSHs (sql);
284			PUTBACK;
285	root	1.5	count = call_sv (sv_prepare, G_METHOD \| G_SCALAR);
286	root	1.1	SPAGAIN;
287
288			if (count != 1)
289			croak ("sql_exec: unable to prepare() statement '%s': %s",
290	root	1.3	SvPV (sql, dc),
291	root	1.9	SvPV (get_sv ("DBI::errstr", TRUE), dd));
292	root	1.1
293			sth = POPs;
294
295			lru_store (dbh, sql, sth);
296			}
297
298			PUSHMARK (SP);
299			EXTEND (SP, items - arg + 1);
300			PUSHs (sth);
301			while (items > arg)
302			{
303	root	1.5	PUSHs (maybe_upgrade_utf8 (ix & 1, ST(arg)));
304	root	1.1	arg++;
305			}
306
307			PUTBACK;
308			/* { static GV *execute;
309			if (!execute) execute = gv_fetchmethod_autoload(SvSTASH(SvRV(sth)), "execute", 0);
310			count = call_sv(GvCV(execute), G_SCALAR);
311			}*/
312	root	1.5	count = call_sv (sv_execute, G_METHOD \| G_SCALAR);
313	root	1.1	SPAGAIN;
314
315			if (count != 1)
316			croak ("sql_exec: execute() didn't return any value ('%s'): %s",
317	root	1.3	SvPV (sql, dc),
318	root	1.10	SvPV (get_sv ("DBI::errstr", TRUE), dd));
319	root	1.1
320			execute = POPs;
321
322			if (!SvTRUE (execute))
323			croak ("sql_exec: unable to execute statement '%s' (%s)",
324	root	1.3	SvPV (sql, dc),
325	root	1.10	SvPV (get_sv ("DBI::errstr", TRUE), dd));
326	root	1.1
327			sv_setsv (GvSV(sql_exec), execute);
328
329			if (bind_first != bind_last)
330			{
331			PUSHMARK (SP);
332			EXTEND (SP, bind_last - bind_first + 2);
333			PUSHs (sth);
334			do {
335			PUSHs (ST(bind_first));
336			bind_first++;
337			} while (bind_first != bind_last);
338
339			PUTBACK;
340	root	1.5	count = call_sv (sv_bind_columns, G_METHOD \| G_SCALAR);
341	root	1.1	SPAGAIN;
342
343			if (count != 1)
344			croak ("sql_exec: bind_columns() didn't return any value ('%s'): %s",
345	root	1.3	SvPV (sql, dc),
346	root	1.10	SvPV (get_sv ("DBI::errstr", TRUE), dd));
347	root	1.1
348			if (!SvOK (POPs))
349			croak ("sql_exec: bind_columns() didn't return a true ('%s'): %s",
350	root	1.3	SvPV (sql, dc),
351	root	1.10	SvPV (get_sv ("DBI::errstr", TRUE), dd));
352	root	1.1	}
353
354			/* free our arguments from the stack */
355			SP -= items;
356
357	root	1.5	if ((ix & ~1) == 2)
358	root	1.1	{ /* sql_fetch */
359			SV *row;
360
361			PUSHMARK (SP);
362			XPUSHs (sth);
363			PUTBACK;
364	root	1.5	count = call_sv (sv_fetchrow_arrayref, G_METHOD \| G_SCALAR);
365	root	1.1	SPAGAIN;
366
367			if (count != 1)
368			abort ();
369
370			row = POPs;
371
372			if (SvROK (row))
373			{
374			AV *av;
375
376			switch (GIMME_V)
377			{
378			case G_VOID:
379			/* no thing */
380			break;
381			case G_SCALAR:
382			/* the first element */
383	root	1.5	XPUSHs (maybe_force_utf8 (ix & 1, av_fetch ((AV )SvRV (row), 0, 1)));
384	root	1.1	break;
385			case G_ARRAY:
386			av = (AV *)SvRV (row);
387			count = AvFILL (av) + 1;
388			EXTEND (SP, count);
389			for (arg = 0; arg < count; arg++)
390	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));
391	root	1.1
392			break;
393			default:
394			abort ();
395			}
396			}
397			}
398	root	1.5	else if ((ix & ~1) == 4)
399	root	1.1	{ /* sql_fetchall */
400			SV *rows;
401
402			PUSHMARK (SP);
403			XPUSHs (sth);
404			PUTBACK;
405	root	1.6	count = call_sv (sv_fetchall_arrayref, G_METHOD \| G_SCALAR);
406	root	1.1	SPAGAIN;
407
408			if (count != 1)
409			abort ();
410
411			rows = POPs;
412
413			if (SvROK (rows))
414			{
415			AV av = (AV )SvRV (rows);
416			count = AvFILL (av) + 1;
417
418			if (count)
419			{
420	root	1.6	int columns = AvFILL ((AV ) SvRV (AvARRAY (av)[0])) + 1; / columns? */
421	root	1.1
422			EXTEND (SP, count);
423			if (columns == 1)
424			for (arg = 0; arg < count; arg++)
425	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY ((AV *)SvRV (AvARRAY (av)[arg]))[0]));
426	root	1.1	else
427			for (arg = 0; arg < count; arg++)
428	root	1.5	PUSHs (maybe_force_utf8 (ix & 1, AvARRAY (av)[arg]));
429	root	1.1	}
430			}
431			}
432			else
433			XPUSHs (sth);
434
435	root	1.5	if (ix > 1 \|\| GIMME_V == G_VOID)
436	root	1.1	{
437			PUSHMARK (SP);
438			XPUSHs (sth);
439			PUTBACK;
440	root	1.5	(void) call_sv (sv_finish, G_METHOD \| G_DISCARD);
441	root	1.1	SPAGAIN;
442			}
443			}
444			}
445
446
447