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DBI.xs
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/* vim: ts=8:sw=4:expandtab
*
* $Id$
*
* Copyright (c) 2024-2025 DBI Team
* Copyright (c) 1994-2024 Tim Bunce Ireland.
*
* See COPYRIGHT section in DBI.pm for usage and distribution rights.
*/
#define IN_DBI_XS 1 /* see DBIXS.h */
#define PERL_NO_GET_CONTEXT
#include "DBIXS.h" /* DBI public interface for DBD's written in C */
# if (defined(_WIN32) && (! defined(HAS_GETTIMEOFDAY)))
#include <sys/timeb.h>
# endif
/* The XS dispatcher code can optimize calls to XS driver methods,
* bypassing the usual call_sv() and argument handling overheads.
* Just-in-case it causes problems there's an (undocumented) way
* to disable it by setting an env var.
*/
static int use_xsbypass = 1; /* set in dbi_bootinit() */
#ifndef CvISXSUB
#define CvISXSUB(sv) CvXSUB(sv)
#endif
#define DBI_MAGIC '~'
/* HvMROMETA introduced in 5.9.5, but mro_meta_init not exported in 5.10.0 */
#if (PERL_REVISION == 5)
# if (PERL_VERSION < 10)
# define MY_cache_gen(stash) 0
# else
# if ((PERL_VERSION == 10) && (PERL_SUBVERSION == 0))
# define MY_cache_gen(stash) \
(HvAUX(stash)->xhv_mro_meta \
? HvAUX(stash)->xhv_mro_meta->cache_gen \
: 0)
# else
# define MY_cache_gen(stash) HvMROMETA(stash)->cache_gen
# endif
# endif
#endif
/* If the tests fail with errors about 'setlinebuf' then try */
/* deleting the lines in the block below except the setvbuf one */
#ifndef PerlIO_setlinebuf
# ifdef HAS_SETLINEBUF
# define PerlIO_setlinebuf(f) setlinebuf(f)
# else
# ifndef USE_PERLIO
# define PerlIO_setlinebuf(f) setvbuf(f, Nullch, _IOLBF, 0)
# endif
# endif
#endif
#if (PERL_REVISION == 5)
# if (PERL_VERSION < 8) || ((PERL_VERSION == 8) && (PERL_SUBVERSION == 0))
# define DBI_save_hv_fetch_ent
# endif
/* prior to 5.8.9: when a CV is duped, the mg dup method is called,
* then *afterwards*, any_ptr is copied from the old CV to the new CV.
* This wipes out anything which the dup method did to any_ptr.
* This needs working around */
# if defined(USE_ITHREADS) && (PERL_VERSION == 8) && (PERL_SUBVERSION < 9)
# define BROKEN_DUP_ANY_PTR
# endif
#endif
/* types of method name */
typedef enum {
methtype_ordinary, /* nothing special about this method name */
methtype_DESTROY,
methtype_FETCH,
methtype_can,
methtype_fetch_star, /* fetch*, i.e. fetch() or fetch_...() */
methtype_set_err
} meth_types;
static imp_xxh_t *dbih_getcom _((SV *h));
static imp_xxh_t *dbih_getcom2 _((pTHX_ SV *h, MAGIC **mgp));
static void dbih_clearcom _((imp_xxh_t *imp_xxh));
static int dbih_logmsg _((imp_xxh_t *imp_xxh, const char *fmt, ...));
static SV *dbih_make_com _((SV *parent_h, imp_xxh_t *p_imp_xxh, const char *imp_class, STRLEN imp_size, STRLEN extra, SV *copy));
static SV *dbih_make_fdsv _((SV *sth, const char *imp_class, STRLEN imp_size, const char *col_name));
static AV *dbih_get_fbav _((imp_sth_t *imp_sth));
static SV *dbih_event _((SV *h, const char *name, SV*, SV*));
static int dbih_set_attr_k _((SV *h, SV *keysv, int dbikey, SV *valuesv));
static SV *dbih_get_attr_k _((SV *h, SV *keysv, int dbikey));
static int dbih_sth_bind_col _((SV *sth, SV *col, SV *ref, SV *attribs));
static int set_err_char _((SV *h, imp_xxh_t *imp_xxh, const char *err_c, IV err_i, const char *errstr, const char *state, const char *method));
static int set_err_sv _((SV *h, imp_xxh_t *imp_xxh, SV *err, SV *errstr, SV *state, SV *method));
static int quote_type _((int sql_type, int p, int s, int *base_type, void *v));
static int sql_type_cast_svpv _((pTHX_ SV *sv, int sql_type, U32 flags, void *v));
static I32 dbi_hash _((const char *string, long i));
static void dbih_dumphandle _((pTHX_ SV *h, const char *msg, int level));
static int dbih_dumpcom _((pTHX_ imp_xxh_t *imp_xxh, const char *msg, int level));
static int dbi_ima_free(pTHX_ SV* sv, MAGIC* mg);
#if defined(USE_ITHREADS) && !defined(BROKEN_DUP_ANY_PTR)
static int dbi_ima_dup(pTHX_ MAGIC* mg, CLONE_PARAMS *param);
#endif
char *neatsvpv _((SV *sv, STRLEN maxlen));
SV * preparse(SV *dbh, const char *statement, IV ps_return, IV ps_accept, void *foo);
static meth_types get_meth_type(const char * const name);
struct imp_drh_st { dbih_drc_t com; };
struct imp_dbh_st { dbih_dbc_t com; };
struct imp_sth_st { dbih_stc_t com; };
struct imp_fdh_st { dbih_fdc_t com; };
/* identify the type of a method name for dispatch behaviour */
/* (should probably be folded into the IMA flags mechanism) */
static meth_types
get_meth_type(const char * const name)
{
switch (name[0]) {
case 'D':
if strEQ(name,"DESTROY")
return methtype_DESTROY;
break;
case 'F':
if strEQ(name,"FETCH")
return methtype_FETCH;
break;
case 'c':
if strEQ(name,"can")
return methtype_can;
break;
case 'f':
if strnEQ(name,"fetch", 5) /* fetch* */
return methtype_fetch_star;
break;
case 's':
if strEQ(name,"set_err")
return methtype_set_err;
break;
}
return methtype_ordinary;
}
/* Internal Method Attributes (attached to dispatch methods when installed) */
/* NOTE: when adding SVs to dbi_ima_t, update dbi_ima_dup() dbi_ima_free()
* to ensure that they are duped and correctly ref-counted */
typedef struct dbi_ima_st {
U8 minargs;
U8 maxargs;
IV hidearg;
/* method_trace controls tracing of method calls in the dispatcher:
- if the current trace flags include a trace flag in method_trace
then set trace_level to min(2,trace_level) for duration of the call.
- else, if trace_level < (method_trace & DBIc_TRACE_LEVEL_MASK)
then don't trace the call
*/
U32 method_trace;
const char *usage_msg;
U32 flags;
meth_types meth_type;
/* cached outer to inner method mapping */
HV *stash; /* the stash we found the GV in */
GV *gv; /* the GV containing the inner sub */
U32 generation; /* cache invalidation */
#ifdef BROKEN_DUP_ANY_PTR
PerlInterpreter *my_perl; /* who owns this struct */
#endif
} dbi_ima_t;
/* These values are embedded in the data passed to install_method */
#define IMA_HAS_USAGE 0x00000001 /* check parameter usage */
#define IMA_FUNC_REDIRECT 0x00000002 /* is $h->func(..., "method") */
#define IMA_KEEP_ERR 0x00000004 /* don't reset err & errstr */
#define IMA_KEEP_ERR_SUB 0x00000008 /* '' if in a nested call */
#define IMA_NO_TAINT_IN 0x00000010 /* don't check for PL_tainted args */
#define IMA_NO_TAINT_OUT 0x00000020 /* don't taint results */
#define IMA_COPY_UP_STMT 0x00000040 /* copy sth Statement to dbh */
#define IMA_END_WORK 0x00000080 /* method is commit or rollback */
#define IMA_STUB 0x00000100 /* donothing eg $dbh->connected */
#define IMA_CLEAR_STMT 0x00000200 /* clear Statement before call */
#define IMA_UNRELATED_TO_STMT 0x00000400 /* profile as empty Statement */
#define IMA_NOT_FOUND_OKAY 0x00000800 /* no error if not found */
#define IMA_EXECUTE 0x00001000 /* do/execute: DBIcf_Executed */
#define IMA_SHOW_ERR_STMT 0x00002000 /* dbh meth relates to Statement*/
#define IMA_HIDE_ERR_PARAMVALUES 0x00004000 /* ParamValues are not relevant */
#define IMA_IS_FACTORY 0x00008000 /* new h ie connect and prepare */
#define IMA_CLEAR_CACHED_KIDS 0x00010000 /* clear CachedKids before call */
#define DBIc_STATE_adjust(imp_xxh, state) \
(SvOK(state) /* SQLSTATE is implemented by driver */ \
? (strEQ(SvPV_nolen(state),"00000") ? &PL_sv_no : sv_mortalcopy(state))\
: (SvTRUE(DBIc_ERR(imp_xxh)) \
? sv_2mortal(newSVpv("S1000",5)) /* General error */ \
: &PL_sv_no) /* Success ("00000") */ \
)
#define DBI_LAST_HANDLE g_dbi_last_h /* special fake inner handle */
#define DBI_IS_LAST_HANDLE(h) ((DBI_LAST_HANDLE) == SvRV(h))
#define DBI_SET_LAST_HANDLE(h) ((DBI_LAST_HANDLE) = SvRV(h))
#define DBI_UNSET_LAST_HANDLE ((DBI_LAST_HANDLE) = &PL_sv_undef)
#define DBI_LAST_HANDLE_OK ((DBI_LAST_HANDLE) != &PL_sv_undef)
#define DBIS_TRACE_LEVEL (DBIS->debug & DBIc_TRACE_LEVEL_MASK)
#define DBIS_TRACE_FLAGS (DBIS->debug) /* includes level */
#ifdef PERL_LONG_MAX
#define MAX_LongReadLen PERL_LONG_MAX
#else
#define MAX_LongReadLen 2147483647L
#endif
#ifdef DBI_USE_THREADS
static char *dbi_build_opt = "-ithread";
#else
static char *dbi_build_opt = "-nothread";
#endif
/* 32 bit magic FNV-0 and FNV-1 prime */
#define FNV_32_PRIME ((UV)0x01000193)
/* perl doesn't know anything about the dbi_ima_t struct attached to the
* CvXSUBANY(cv).any_ptr slot, so add some magic to the CV to handle
* duping and freeing.
*/
static MGVTBL dbi_ima_vtbl = { 0, 0, 0, 0, dbi_ima_free,
0,
#if defined(USE_ITHREADS) && !defined(BROKEN_DUP_ANY_PTR)
dbi_ima_dup
#else
0
#endif
#if (PERL_REVISION == 5)
# if (PERL_VERSION > 8) || ((PERL_VERSION == 8) && (PERL_SUBVERSION >= 9))
, 0
# endif
#endif
};
static int dbi_ima_free(pTHX_ SV* sv, PERL_UNUSED_DECL MAGIC* mg)
{
dbi_ima_t *ima = (dbi_ima_t *)(CvXSUBANY((CV*)sv).any_ptr);
#ifdef BROKEN_DUP_ANY_PTR
if (ima->my_perl != my_perl)
return 0;
#endif
SvREFCNT_dec(ima->stash);
SvREFCNT_dec(ima->gv);
Safefree(ima);
return 0;
}
#if defined(USE_ITHREADS) && !defined(BROKEN_DUP_ANY_PTR)
static int dbi_ima_dup(pTHX_ MAGIC* mg, CLONE_PARAMS *param)
{
dbi_ima_t *ima, *nima;
CV *cv = (CV*) mg->mg_ptr;
CV *ncv = (CV*)ptr_table_fetch(PL_ptr_table, (cv));
PERL_UNUSED_VAR(param);
mg->mg_ptr = (char *)ncv;
ima = (dbi_ima_t*) CvXSUBANY(cv).any_ptr;
Newx(nima, 1, dbi_ima_t);
*nima = *ima; /* structure copy */
CvXSUBANY(ncv).any_ptr = nima;
nima->stash = NULL;
nima->gv = NULL;
return 0;
}
#endif
/* --- make DBI safe for multiple perl interpreters --- */
/* Originally contributed by Murray Nesbitt of ActiveState, */
/* but later updated to use MY_CTX */
#define MY_CXT_KEY "DBI::_guts" XS_VERSION
typedef struct {
SV *dbi_last_h; /* maybe better moved into dbistate_t? */
dbistate_t* dbi_state;
} my_cxt_t;
START_MY_CXT
#undef DBIS
#define DBIS (MY_CXT.dbi_state)
#define g_dbi_last_h (MY_CXT.dbi_last_h)
/* allow the 'static' dbi_state struct to be accessed from other files */
dbistate_t**
_dbi_state_lval(pTHX)
{
dMY_CXT;
return &(MY_CXT.dbi_state);
}
/* --- */
static void *
malloc_using_sv(STRLEN len)
{
dTHX;
SV *sv = newSV(len ? len : 1);
void *p = SvPVX(sv);
memzero(p, len);
return p;
}
static char *
savepv_using_sv(char *str)
{
char *buf = malloc_using_sv(strlen(str));
strcpy(buf, str);
return buf;
}
/* --- support functions for concat_hash_sorted --- */
typedef struct str_uv_sort_pair_st {
char *key;
UV numeric;
} str_uv_sort_pair_t;
static int
_cmp_number(const void *val1, const void *val2)
{
UV first = ((str_uv_sort_pair_t *)val1)->numeric;
UV second = ((str_uv_sort_pair_t *)val2)->numeric;
if (first > second)
return 1;
if (first < second)
return -1;
/* only likely to reach here if numeric sort forced for non-numeric keys */
/* fallback to comparing the key strings */
return strcmp(
((str_uv_sort_pair_t *)val1)->key,
((str_uv_sort_pair_t *)val2)->key
);
}
static int
_cmp_str (const void *val1, const void *val2)
{
return strcmp( *(char **)val1, *(char **)val2);
}
static char **
_sort_hash_keys (HV *hash, int num_sort, STRLEN *total_length)
{
dTHX;
I32 hv_len, key_len;
HE *entry;
char **keys;
unsigned int idx = 0;
STRLEN tot_len = 0;
bool has_non_numerics = 0;
str_uv_sort_pair_t *numbers;
hv_len = hv_iterinit(hash);
if (!hv_len)
return 0;
Newz(0, keys, hv_len, char *);
Newz(0, numbers, hv_len, str_uv_sort_pair_t);
while ((entry = hv_iternext(hash))) {
*(keys+idx) = hv_iterkey(entry, &key_len);
tot_len += key_len;
if (grok_number(*(keys+idx), key_len, &(numbers+idx)->numeric) != IS_NUMBER_IN_UV) {
has_non_numerics = 1;
(numbers+idx)->numeric = 0;
}
(numbers+idx)->key = *(keys+idx);
++idx;
}
if (total_length)
*total_length = tot_len;
if (num_sort < 0)
num_sort = (has_non_numerics) ? 0 : 1;
if (!num_sort) {
qsort(keys, hv_len, sizeof(char*), _cmp_str);
}
else {
qsort(numbers, hv_len, sizeof(str_uv_sort_pair_t), _cmp_number);
for (idx = 0; idx < hv_len; ++idx)
*(keys+idx) = (numbers+idx)->key;
}
Safefree(numbers);
return keys;
}
static SV *
_join_hash_sorted(HV *hash, char *kv_sep, STRLEN kv_sep_len, char *pair_sep, STRLEN pair_sep_len, int use_neat, int num_sort)
{
dTHX;
I32 hv_len;
STRLEN total_len = 0;
char **keys;
unsigned int i = 0;
SV *return_sv;
keys = _sort_hash_keys(hash, num_sort, &total_len);
if (!keys)
return newSVpv("", 0);
if (!kv_sep_len)
kv_sep_len = strlen(kv_sep);
if (!pair_sep_len)
pair_sep_len = strlen(pair_sep);
hv_len = hv_iterinit(hash);
/* total_len += Separators + quotes + term null */
total_len += kv_sep_len*hv_len + pair_sep_len*hv_len+2*hv_len+1;
return_sv = newSV(total_len);
sv_setpv(return_sv, ""); /* quell undef warnings */
for (i=0; i<hv_len; ++i) {
SV **hash_svp = hv_fetch(hash, keys[i], strlen(keys[i]), 0);
sv_catpv(return_sv, keys[i]); /* XXX keys can't contain nul chars */
sv_catpvn(return_sv, kv_sep, kv_sep_len);
if (!hash_svp) { /* should never happen */
warn("No hash entry with key '%s'", keys[i]);
sv_catpvn(return_sv, "???", 3);
continue;
}
if (use_neat) {
sv_catpv(return_sv, neatsvpv(*hash_svp,0));
}
else {
if (SvOK(*hash_svp)) {
STRLEN hv_val_len;
char *hv_val = SvPV(*hash_svp, hv_val_len);
sv_catpvn(return_sv, "'", 1);
sv_catpvn(return_sv, hv_val, hv_val_len);
sv_catpvn(return_sv, "'", 1);
}
else sv_catpvn(return_sv, "undef", 5);
}
if (i < hv_len-1)
sv_catpvn(return_sv, pair_sep, pair_sep_len);
}
Safefree(keys);
return return_sv;
}
/* handy for embedding into condition expression for debugging */
/*
static int warn1(char *s) { warn("%s", s); return 1; }
static int dump1(SV *sv) { dTHX; sv_dump(sv); return 1; }
*/
/* --- */
static void
check_version(const char *name, int dbis_cv, int dbis_cs, int need_dbixs_cv, int drc_s,
int dbc_s, int stc_s, int fdc_s)
{
dTHX;
dMY_CXT;
static const char msg[] = "you probably need to rebuild the DBD driver (or possibly the DBI)";
(void)need_dbixs_cv;
if (dbis_cv != DBISTATE_VERSION || dbis_cs != sizeof(*DBIS))
croak("DBI/DBD internal version mismatch (DBI is v%d/s%lu, DBD %s expected v%d/s%d) %s.\n",
DBISTATE_VERSION, (long unsigned int)sizeof(*DBIS), name, dbis_cv, dbis_cs, msg);
/* Catch structure size changes - We should probably force a recompile if the DBI */
/* runtime version is different from the build time. That would be harsh but safe. */
if (drc_s != sizeof(dbih_drc_t) || dbc_s != sizeof(dbih_dbc_t) ||
stc_s != sizeof(dbih_stc_t) || fdc_s != sizeof(dbih_fdc_t) )
croak("%s (dr:%d/%ld, db:%d/%ld, st:%d/%ld, fd:%d/%ld), %s.\n",
"DBI/DBD internal structure mismatch",
drc_s, (long)sizeof(dbih_drc_t), dbc_s, (long)sizeof(dbih_dbc_t),
stc_s, (long)sizeof(dbih_stc_t), fdc_s, (long)sizeof(dbih_fdc_t), msg);
}
static void
dbi_bootinit(dbistate_t * parent_dbis)
{
dTHX;
dMY_CXT;
dbistate_t* DBISx;
DBISx = (struct dbistate_st*)malloc_using_sv(sizeof(struct dbistate_st));
DBIS = DBISx;
/* make DBIS available to DBD modules the "old" (<= 1.618) way,
* so that unrecompiled DBD's will still work against a newer DBI */
sv_setiv(get_sv("DBI::_dbistate", GV_ADDMULTI),
PTR2IV(MY_CXT.dbi_state));
/* store version and size so we can spot DBI/DBD version mismatch */
DBIS->check_version = check_version;
DBIS->version = DBISTATE_VERSION;
DBIS->size = sizeof(*DBIS);
DBIS->xs_version = DBIXS_VERSION;
DBIS->logmsg = dbih_logmsg;
DBIS->logfp = PerlIO_stderr();
DBIS->debug = (parent_dbis) ? parent_dbis->debug
: SvIV(get_sv("DBI::dbi_debug",0x5));
DBIS->neatsvpvlen = (parent_dbis) ? parent_dbis->neatsvpvlen
: get_sv("DBI::neat_maxlen", GV_ADDMULTI);
#ifdef DBI_USE_THREADS
DBIS->thr_owner = PERL_GET_THX;
#endif
/* store some function pointers so DBD's can call our functions */
DBIS->getcom = dbih_getcom;
DBIS->clearcom = dbih_clearcom;
DBIS->event = dbih_event;
DBIS->set_attr_k = dbih_set_attr_k;
DBIS->get_attr_k = dbih_get_attr_k;
DBIS->get_fbav = dbih_get_fbav;
DBIS->make_fdsv = dbih_make_fdsv;
DBIS->neat_svpv = neatsvpv;
DBIS->bind_as_num = quote_type; /* XXX deprecated */
DBIS->hash = dbi_hash;
DBIS->set_err_sv = set_err_sv;
DBIS->set_err_char= set_err_char;
DBIS->bind_col = dbih_sth_bind_col;
DBIS->sql_type_cast_svpv = sql_type_cast_svpv;
/* Remember the last handle used. BEWARE! Sneaky stuff here! */
/* We want a handle reference but we don't want to increment */
/* the handle's reference count and we don't want perl to try */
/* to destroy it during global destruction. Take care! */
DBI_UNSET_LAST_HANDLE; /* ensure setup the correct way */
/* trick to avoid 'possible typo' warnings */
gv_fetchpv("DBI::state", GV_ADDMULTI, SVt_PV);
gv_fetchpv("DBI::err", GV_ADDMULTI, SVt_PV);
gv_fetchpv("DBI::errstr", GV_ADDMULTI, SVt_PV);
gv_fetchpv("DBI::lasth", GV_ADDMULTI, SVt_PV);
gv_fetchpv("DBI::rows", GV_ADDMULTI, SVt_PV);
/* we only need to check the env var on the initial boot
* which is handy because it can core dump during CLONE on windows
*/
if (!parent_dbis && getenv("PERL_DBI_XSBYPASS"))
use_xsbypass = atoi(getenv("PERL_DBI_XSBYPASS"));
}
/* ----------------------------------------------------------------- */
/* Utility functions */
static char *
dbih_htype_name(int htype)
{
switch(htype) {
case DBIt_DR: return "dr";
case DBIt_DB: return "db";
case DBIt_ST: return "st";
case DBIt_FD: return "fd";
default: return "??";
}
}
char *
neatsvpv(SV *sv, STRLEN maxlen) /* return a tidy ascii value, for debugging only */
{
dTHX;
dMY_CXT;
STRLEN len;
SV *nsv = Nullsv;
SV *infosv = Nullsv;
char *v, *quote;
/* We take care not to alter the supplied sv in any way at all. */
/* (but if it is SvGMAGICAL we have to call mg_get and that can */
/* have side effects, especially as it may be called twice overall.) */
if (!sv)
return "Null!"; /* should never happen */
/* try to do the right thing with magical values */
if (SvMAGICAL(sv)) {
if (DBIS_TRACE_LEVEL >= 5) { /* add magic details to help debugging */
MAGIC* mg;
infosv = sv_2mortal(newSVpv(" (magic-",0));
if (SvSMAGICAL(sv)) sv_catpvn(infosv,"s",1);
if (SvGMAGICAL(sv)) sv_catpvn(infosv,"g",1);
if (SvRMAGICAL(sv)) sv_catpvn(infosv,"r",1);
sv_catpvn(infosv,":",1);
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic)
sv_catpvn(infosv, &mg->mg_type, 1);
sv_catpvn(infosv, ")", 1);
}
if (SvGMAGICAL(sv) && !PL_dirty)
mg_get(sv); /* trigger magic to FETCH the value */
}
if (!SvOK(sv)) {
if (SvTYPE(sv) >= SVt_PVAV)
return (char *)sv_reftype(sv,0); /* raw AV/HV etc, not via a ref */
if (!infosv)
return "undef";
sv_insert(infosv, 0,0, "undef",5);
return SvPVX(infosv);
}
if (SvNIOK(sv)) { /* is a numeric value - so no surrounding quotes */
if (SvPOK(sv)) { /* already has string version of the value, so use it */
v = SvPV(sv,len);
if (len == 0) { v="''"; len=2; } /* catch &sv_no style special case */
if (!infosv)
return v;
sv_insert(infosv, 0,0, v, len);
return SvPVX(infosv);
}
/* we don't use SvPV here since we don't want to alter sv in _any_ way */
if (SvUOK(sv))
nsv = newSVpvf("%"UVuf, SvUVX(sv));
else if (SvIOK(sv))
nsv = newSVpvf("%"IVdf, SvIVX(sv));
else nsv = newSVpvf("%"NVgf, SvNVX(sv));
if (infosv)
sv_catsv(nsv, infosv);
return SvPVX(sv_2mortal(nsv));
}
nsv = sv_newmortal();
sv_upgrade(nsv, SVt_PV);
if (SvROK(sv)) {
if (!SvAMAGIC(sv)) /* (un-amagic'd) refs get no special treatment */
v = SvPV(sv,len);
else {
/* handle Overload magic refs */
(void)SvAMAGIC_off(sv); /* should really be done via local scoping */
v = SvPV(sv,len); /* XXX how does this relate to SvGMAGIC? */
SvAMAGIC_on(sv);
}
sv_setpvn(nsv, v, len);
if (infosv)
sv_catsv(nsv, infosv);
return SvPV(nsv, len);
}
if (SvPOK(sv)) /* usual simple string case */
v = SvPV(sv,len);
else /* handles all else via sv_2pv() */
v = SvPV(sv,len); /* XXX how does this relate to SvGMAGIC? */
/* for strings we limit the length and translate codes */
if (maxlen == 0)
maxlen = SvIV(DBIS->neatsvpvlen);
if (maxlen < 6) /* handle daft values */
maxlen = 6;
maxlen -= 2; /* account for quotes */
quote = (SvUTF8(sv)) ? "\"" : "'";
if (len > maxlen) {
SvGROW(nsv, (1+maxlen+1+1));
sv_setpvn(nsv, quote, 1);
sv_catpvn(nsv, v, maxlen-3); /* account for three dots */
sv_catpvn(nsv, "...", 3);
} else {
SvGROW(nsv, (1+len+1+1));
sv_setpvn(nsv, quote, 1);
sv_catpvn(nsv, v, len);
}
sv_catpvn(nsv, quote, 1);
if (infosv)
sv_catsv(nsv, infosv);
v = SvPV(nsv, len);
if (!SvUTF8(sv)) {
while(len-- > 0) { /* cleanup string (map control chars to ascii etc) */
const char c = v[len] & 0x7F; /* ignore top bit for multinational chars */
if (!isPRINT(c) && !isSPACE(c))
v[len] = '.';
}
}
return v;
}
static void
copy_statement_to_parent(pTHX_ SV *h, imp_xxh_t *imp_xxh)
{
SV *parent;
if (PL_dirty)
return;
parent = DBIc_PARENT_H(imp_xxh);
if (parent && SvROK(parent)) {
SV *tmp_sv = *hv_fetch((HV*)SvRV(h), "Statement", 9, 1);
if (SvOK(tmp_sv))
(void)hv_store((HV*)SvRV(parent), "Statement", 9, SvREFCNT_inc(tmp_sv), 0);
}
}
static int
set_err_char(SV *h, imp_xxh_t *imp_xxh, const char *err_c, IV err_i, const char *errstr, const char *state, const char *method)
{
dTHX;
char err_buf[28];
SV *err_sv, *errstr_sv, *state_sv, *method_sv;
if (!err_c) {
sprintf(err_buf, "%ld", (long)err_i);
err_c = &err_buf[0];
}
err_sv = (strEQ(err_c,"1")) ? &PL_sv_yes : sv_2mortal(newSVpvn(err_c, strlen(err_c)));
errstr_sv = sv_2mortal(newSVpvn(errstr, strlen(errstr)));
state_sv = (state && *state) ? sv_2mortal(newSVpvn(state, strlen(state))) : &PL_sv_undef;
method_sv = (method && *method) ? sv_2mortal(newSVpvn(method, strlen(method))) : &PL_sv_undef;
return set_err_sv(h, imp_xxh, err_sv, errstr_sv, state_sv, method_sv);
}
static int
set_err_sv(SV *h, imp_xxh_t *imp_xxh, SV *err, SV *errstr, SV *state, SV *method)
{
dTHX;
SV *h_err;
SV *h_errstr;
SV *h_state;
SV **hook_svp;
int err_changed = 0;
if ( DBIc_has(imp_xxh, DBIcf_HandleSetErr)
&& (hook_svp = hv_fetch((HV*)SvRV(h),"HandleSetErr",12,0))
&& hook_svp
&& ((void)(SvGMAGICAL(*hook_svp) && mg_get(*hook_svp)), SvOK(*hook_svp))
) {
dSP;
IV items;
SV *response_sv;
if (SvREADONLY(err)) err = sv_mortalcopy(err);
if (SvREADONLY(errstr)) errstr = sv_mortalcopy(errstr);
if (SvREADONLY(state)) state = sv_mortalcopy(state);
if (SvREADONLY(method)) method = sv_mortalcopy(method);
if (DBIc_TRACE_LEVEL(imp_xxh) >= 2)
PerlIO_printf(DBIc_LOGPIO(imp_xxh)," -> HandleSetErr(%s, err=%s, errstr=%s, state=%s, %s)\n",
neatsvpv(h,0), neatsvpv(err,0), neatsvpv(errstr,0), neatsvpv(state,0),
neatsvpv(method,0)
);
PUSHMARK(SP);
XPUSHs(sv_2mortal(newRV_inc((SV*)DBIc_MY_H(imp_xxh))));
XPUSHs(err);
XPUSHs(errstr);
XPUSHs(state);
XPUSHs(method);
PUTBACK;
items = call_sv(*hook_svp, G_SCALAR);
SPAGAIN;
response_sv = (items) ? POPs : &PL_sv_undef;
PUTBACK;
if (DBIc_TRACE_LEVEL(imp_xxh) >= 1)
PerlIO_printf(DBIc_LOGPIO(imp_xxh)," <- HandleSetErr= %s (err=%s, errstr=%s, state=%s, %s)\n",
neatsvpv(response_sv,0), neatsvpv(err,0), neatsvpv(errstr,0), neatsvpv(state,0),
neatsvpv(method,0)
);
if (SvTRUE(response_sv)) /* handler says it has handled it, so... */
return 0;
}
else {
if (DBIc_TRACE_LEVEL(imp_xxh) >= 2)
PerlIO_printf(DBIc_LOGPIO(imp_xxh)," -- HandleSetErr err=%s, errstr=%s, state=%s, %s\n",
neatsvpv(err,0), neatsvpv(errstr,0), neatsvpv(state,0), neatsvpv(method,0)
);
}
if (!SvOK(err)) { /* clear err / errstr / state */
DBIh_CLEAR_ERROR(imp_xxh);
return 1;
}
/* fetch these after calling HandleSetErr */
h_err = DBIc_ERR(imp_xxh);
h_errstr = DBIc_ERRSTR(imp_xxh);
h_state = DBIc_STATE(imp_xxh);
if (SvTRUE(h_errstr)) {
/* append current err, if any, to errstr if it's going to change */
if (SvTRUE(h_err) && SvTRUE(err) && strNE(SvPV_nolen(h_err), SvPV_nolen(err)))
sv_catpvf(h_errstr, " [err was %s now %s]", SvPV_nolen(h_err), SvPV_nolen(err));
if (SvTRUE(h_state) && SvTRUE(state) && strNE(SvPV_nolen(h_state), SvPV_nolen(state)))
sv_catpvf(h_errstr, " [state was %s now %s]", SvPV_nolen(h_state), SvPV_nolen(state));
if (strNE(SvPV_nolen(h_errstr), SvPV_nolen(errstr))) {
sv_catpvn(h_errstr, "\n", 1);
sv_catsv(h_errstr, errstr);
}
}
else
sv_setsv(h_errstr, errstr);
/* SvTRUE(err) > "0" > "" > undef */
if (SvTRUE(err) /* new error: so assign */
|| !SvOK(h_err) /* no existing warn/info: so assign */
/* new warn ("0" len 1) > info ("" len 0): so assign */
|| (SvOK(err) && strlen(SvPV_nolen(err)) > strlen(SvPV_nolen(h_err)))
) {
sv_setsv(h_err, err);
err_changed = 1;
if (SvTRUE(h_err)) /* new error */
++DBIc_ErrCount(imp_xxh);
}
if (err_changed) {
if (SvTRUE(state)) {
if (strlen(SvPV_nolen(state)) != 5) {
warn("set_err: state (%s) is not a 5 character string, using 'S1000' instead", neatsvpv(state,0));
sv_setpv(h_state, "S1000");
}
else
sv_setsv(h_state, state);
}
else
(void)SvOK_off(h_state); /* see DBIc_STATE_adjust */
/* ensure that the parent's Statement attribute reflects the latest error */
/* so that ShowErrorStatement is reliable */
copy_statement_to_parent(aTHX_ h, imp_xxh);
}
return 1;
}
/* err_hash returns a U32 'hash' value representing the current err 'level'
* (err/warn/info) and errstr. It's used by the dispatcher as a way to detect
* a new or changed warning during a 'keep err' method like STORE. Always returns >0.
* The value is 1 for no err/warn/info and guarantees that err > warn > info.
* (It's a bit of a hack but the original approach in 70fe6bd76 using a new
* ErrChangeCount attribute would break binary compatibility with drivers.)
* The chance that two realistic errstr values would hash the same, even with
* only 30 bits, is deemed to small to even bother documenting.
*/
static U32
err_hash(pTHX_ imp_xxh_t *imp_xxh)
{
SV *err_sv = DBIc_ERR(imp_xxh);
SV *errstr_sv;
I32 hash = 1;
if (SvOK(err_sv)) {
errstr_sv = DBIc_ERRSTR(imp_xxh);
if (SvOK(errstr_sv))
hash = -dbi_hash(SvPV_nolen(errstr_sv), 0); /* make positive */
else hash = 0;
hash >>= 1; /* free up extra bit (top bit is already free) */
hash |= (SvTRUE(err_sv)) ? 0x80000000 /* err */
: (SvPOK(err_sv) && !SvCUR(err_sv)) ? 0x20000000 /* '' = info */
: 0x40000000;/* 0 or '0' = warn */
}
return hash;
}
static char *
mkvname(pTHX_ HV *stash, const char *item, int uplevel) /* construct a variable name */
{
SV *sv = sv_newmortal();
sv_setpv(sv, HvNAME(stash));
if(uplevel) {
while(SvCUR(sv) && *SvEND(sv)!=':')
--SvCUR(sv);
if (SvCUR(sv))
--SvCUR(sv);
}
sv_catpv(sv, "::");
sv_catpv(sv, item);
return SvPV_nolen(sv);
}
/* 32 bit magic FNV-0 and FNV-1 prime */
#define FNV_32_PRIME ((UV)0x01000193)
static I32
dbi_hash(const char *key, long type)
{
if (type == 0) {
STRLEN klen = strlen(key);
U32 hash = 0;
while (klen--)
hash = hash * 33 + *key++;
hash &= 0x7FFFFFFF; /* limit to 31 bits */
hash |= 0x40000000; /* set bit 31 */
return -(I32)hash; /* return negative int */
}
else if (type == 1) { /* Fowler/Noll/Vo hash */
/* see http://www.isthe.com/chongo/tech/comp/fnv/ */
U32 hash = 0x811c9dc5;
const unsigned char *s = (unsigned char *)key; /* unsigned string */
while (*s) {
/* multiply by the 32 bit FNV magic prime mod 2^32 */
hash *= FNV_32_PRIME;
/* xor the bottom with the current octet */
hash ^= (U32)*s++;
}
return hash;
}
croak("DBI::hash(%ld): invalid type", type);
return 0; /* NOT REACHED */
}
static int
dbih_logmsg(imp_xxh_t *imp_xxh, const char *fmt, ...)
{
dTHX;
va_list args;
#ifdef I_STDARG
va_start(args, fmt);
#else
va_start(args);
#endif
(void) PerlIO_vprintf(DBIc_DBISTATE(imp_xxh)->logfp, fmt, args);
va_end(args);
(void)imp_xxh;
return 1;
}
static void
close_trace_file(pTHX)
{
dMY_CXT;
if (DBILOGFP == PerlIO_stderr() || DBILOGFP == PerlIO_stdout())
return;
if (DBIS->logfp_ref == NULL)
PerlIO_close(DBILOGFP);
else {
/* DAA dec refcount and discard */
SvREFCNT_dec(DBIS->logfp_ref);
DBIS->logfp_ref = NULL;
}
}
static int
set_trace_file(SV *file)
{
dTHX;
dMY_CXT;
const char *filename;
PerlIO *fp = Nullfp;
IO *io;
if (!file) /* no arg == no change */
return 0;
/* DAA check for a filehandle */
if (SvROK(file)) {
io = sv_2io(file);
if (!io || !(fp = IoOFP(io))) {
warn("DBI trace filehandle is not valid");
return 0;
}
close_trace_file(aTHX);
(void)SvREFCNT_inc(io);
DBIS->logfp_ref = io;
}
else if (isGV_with_GP(file)) {
io = GvIO(file);
if (!io || !(fp = IoOFP(io))) {
warn("DBI trace filehandle from GLOB is not valid");
return 0;
}
close_trace_file(aTHX);
(void)SvREFCNT_inc(io);
DBIS->logfp_ref = io;
}
else {
filename = (SvOK(file)) ? SvPV_nolen(file) : Nullch;
/* undef arg == reset back to stderr */