void sv_setpv(SV*, char*);
void sv_setpvn(SV*, char*, int)
void sv_setpvf(SV*, const char*, ...);
+ void sv_setpvfn(SV*, const char*, STRLEN, va_list *, SV **, I32, bool);
void sv_setsv(SV*, SV*);
Notice that you can choose to specify the length of the string to be
allow Perl to calculate the length by using C<sv_setpv> or by specifying
0 as the second argument to C<newSVpv>. Be warned, though, that Perl will
determine the string's length by using C<strlen>, which depends on the
-string terminating with a NUL character. The arguments of C<sv_setpvf>
-are processed like C<sprintf>, and the formatted output becomes the value.
+string terminating with a NUL character.
+
+The arguments of C<sv_setpvf> are processed like C<sprintf>, and the
+formatted output becomes the value.
+
+C<sv_setpvfn> is an analogue of C<vsprintf>, but it allows you to specify
+either a pointer to a variable argument list or the address and length of
+an array of SVs. The last argument points to a boolean; on return, if that
+boolean is true, then locale-specific information has been used to format
+the string, and the string's contents are therefore untrustworty (see
+L<perlsec>). This pointer may be NULL if that information is not
+important. Note that this function requires you to specify the length of
+the format.
+
The C<sv_set*()> functions are not generic enough to operate on values
that have "magic". See L<Magic Virtual Tables> later in this document.
-All SVs that will contain strings should, but need not, be terminated
-with a NUL character. If it is not NUL-terminated there is a risk of
+All SVs that contain strings should be terminated with a NUL character.
+If it is not NUL-terminated there is a risk of
core dumps and corruptions from code which passes the string to C
functions or system calls which expect a NUL-terminated string.
Perl's own functions typically add a trailing NUL for this reason.
void sv_catpv(SV*, char*);
void sv_catpvn(SV*, char*, int);
void sv_catpvf(SV*, const char*, ...);
+ void sv_catpvfn(SV*, const char*, STRLEN, va_list *, SV **, I32, bool);
void sv_catsv(SV*, SV*);
The first function calculates the length of the string to be appended by
using C<strlen>. In the second, you specify the length of the string
yourself. The third function processes its arguments like C<sprintf> and
-appends the formatted output. The fourth function extends the string
-stored in the first SV with the string stored in the second SV. It also
-forces the second SV to be interpreted as a string. The C<sv_cat*()>
-functions are not generic enough to operate on values that have "magic".
-See L<Magic Virtual Tables> later in this document.
+appends the formatted output. The fourth function works like C<vsprintf>.
+You can specify the address and length of an array of SVs instead of the
+va_list argument. The fifth function extends the string stored in the first
+SV with the string stored in the second SV. It also forces the second SV
+to be interpreted as a string.
+
+The C<sv_cat*()> functions are not generic enough to operate on values that
+have "magic". See L<Magic Virtual Tables> later in this document.
If you know the name of a scalar variable, you can get a pointer to its SV
by using the following:
SV* sv_setref_pvn(SV* rv, char* classname, PV iv, int length);
- int sv_isa(SV* sv, char* name);
- int sv_isobject(SV* sv);
+Tests whether the SV is blessed into the specified class. It does not
+check inheritance relationships.
+
+ int sv_isa(SV* sv, char* name);
+
+Tests whether the SV is a reference to a blessed object.
+
+ int sv_isobject(SV* sv);
+
+Tests whether the SV is derived from the specified class. SV can be either
+a reference to a blessed object or a string containing a class name. This
+is the function implementing the C<UNIVERSAL::isa> functionality.
+
+ bool sv_derived_from(SV* sv, char* name);
+
+To check if you've got an object derived from a specific class you have
+to write:
+
+ if (sv_isobject(sv) && sv_derived_from(sv, class)) { ... }
=head2 Creating New Variables
Scalar Value
Array Value
Hash Value
- File Handle
- Directory Handle
+ I/O Handle
Format
Subroutine
To handle this situation, the PPCODE directive is used and the stack is
extended using the macro:
- EXTEND(sp, num);
+ EXTEND(SP, num);
-where C<sp> is the stack pointer, and C<num> is the number of elements the
-stack should be extended by.
+where C<SP> is the macro that represents the local copy of the stack pointer,
+and C<num> is the number of elements the stack should be extended by.
Now that there is room on the stack, values can be pushed on it using the
macros to push IVs, doubles, strings, and SV pointers respectively:
functions:
dSP
+ SP
PUSHMARK()
PUTBACK
SPAGAIN
/ \
$b $c
-(but slightly more complicated). This tree reflect the way Perl
+(but slightly more complicated). This tree reflects the way Perl
parsed your code, but has nothing to do with the execution order.
There is an additional "thread" going through the nodes of the tree
which shows the order of execution of the nodes. In our simplified
forget to run C<make regen_headers> if you modify this file).
A check routine is called when the node is fully constructed except
-for the execution-order thread. Since at this time there is no
+for the execution-order thread. Since at this time there are no
back-links to the currently constructed node, one can do most any
operation to the top-level node, including freeing it and/or creating
new nodes above/below it.
=head2 Compile pass 2: context propagation
When a context for a part of compile tree is known, it is propagated
-down through the tree. Aat this time the context can have 5 values
+down through the tree. At this time the context can have 5 values
(instead of 2 for runtime context): void, boolean, scalar, list, and
lvalue. In contrast with the pass 1 this pass is processed from top
to bottom: a node's context determines the context for its children.
After the compile tree for a subroutine (or for an C<eval> or a file)
is created, an additional pass over the code is performed. This pass
is neither top-down or bottom-up, but in the execution order (with
-additional compilications for conditionals). These optimizations are
+additional complications for conditionals). These optimizations are
done in the subroutine peep(). Optimizations performed at this stage
are subject to the same restrictions as in the pass 2.
This is a listing of functions, macros, flags, and variables that may be
useful to extension writers or that may be found while reading other
extensions.
+The sort order of the listing is case insensitive, with any
+occurrences of '_' ignored for the the purpose of sorting.
=over 8
-=item AvFILL
-
-Same as C<av_len>.
-
=item av_clear
Clears an array, making it empty. Does not free the memory used by the
SV** av_fetch (AV* ar, I32 key, I32 lval)
+=item AvFILL
+
+Same as C<av_len>.
+
=item av_len
Returns the highest index in the array. Returns -1 if the array is empty.
source, C<d> is the destination, C<n> is the number of items, and C<t> is
the type. May fail on overlapping copies. See also C<Move>.
- (void) Copy( s, d, n, t )
+ void Copy( s, d, n, t )
=item croak
Returns the stash of the CV.
- HV * CvSTASH( SV* sv )
+ HV* CvSTASH( SV* sv )
=item DBsingle
=item dSP
-Declares a stack pointer variable, C<sp>, for the XSUB. See C<SP>.
+Declares a local copy of perl's stack pointer for the XSUB, available via
+the C<SP> macro. See C<SP>.
=item dXSARGS
Sets up the C<ix> variable for an XSUB which has aliases. This is usually
handled automatically by C<xsubpp>.
+=item do_binmode
+
+Switches filehandle to binmode. C<iotype> is what C<IoTYPE(io)> would
+contain.
+
+ do_binmode(fp, iotype, TRUE);
+
=item ENTER
Opening bracket on a callback. See C<LEAVE> and L<perlcall>.
EXTEND( sp, int x )
+=item fbm_compile
+
+Analyses the string in order to make fast searches on it using fbm_instr() --
+the Boyer-Moore algorithm.
+
+ void fbm_compile(SV* sv, U32 flags)
+
+=item fbm_instr
+
+Returns the location of the SV in the string delimited by C<str> and
+C<strend>. It returns C<Nullch> if the string can't be found. The
+C<sv> does not have to be fbm_compiled, but the search will not be as
+fast then.
+
+ char* fbm_instr(char *str, char *strend, SV *sv, U32 flags)
+
=item FREETMPS
Closing bracket for temporaries on a callback. See C<SAVETMPS> and
Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and L<perlcall>.
-=item G_VOID
-
-Used to indicate void context. See C<GIMME_V> and L<perlcall>.
-
=item gv_fetchmeth
Returns the glob with the given C<name> and a defined subroutine or
C<NULL>. The glob lives in the given C<stash>, or in the stashes
-accessable via @ISA and @<UNIVERSAL>.
+accessable via @ISA and @UNIVERSAL.
The argument C<level> should be either 0 or -1. If C<level==0>, as a
side-effect creates a glob with the given C<name> in the given
GV* gv_fetchmethod (HV* stash, char* name)
GV* gv_fetchmethod_autoload (HV* stash, char* name, I32 autoload)
+=item G_VOID
+
+Used to indicate void context. See C<GIMME_V> and L<perlcall>.
+
=item gv_stashpv
Returns a pointer to the stash for a specified package. If C<create> is set
=item HeHASH
-Returns the computed hash (type C<U32>) stored in the hash entry.
+Returns the computed hash stored in the hash entry.
- HeHASH(HE* he)
+ U32 HeHASH(HE* he)
=item HeKEY
C<HeKLEN()>. Can be assigned to. The C<HePV()> or C<HeSVKEY()> macros
are usually preferable for finding the value of a key.
- HeKEY(HE* he)
+ char* HeKEY(HE* he)
=item HeKLEN
Can be assigned to. The C<HePV()> macro is usually preferable for finding
key lengths.
- HeKLEN(HE* he)
+ int HeKLEN(HE* he)
=item HePV
This is very similar to the C<SvPV()> macro described elsewhere in
this document.
- HePV(HE* he, STRLEN len)
+ char* HePV(HE* he, STRLEN len)
=item HeSVKEY
I32 hv_iterinit (HV* tb)
-Note that hv_iterinit I<currently> returns the number of I<buckets> in
-the hash and I<not> the number of keys (as indicated in the Advanced
-Perl Programming book). This may change in future. Use the HvKEYS(hv)
-macro to find the number of keys in a hash.
+Returns the number of keys in the hash (i.e. the same as C<HvKEYS(tb)>).
+The return value is currently only meaningful for hashes without tie
+magic.
+
+NOTE: Before version 5.004_65, C<hv_iterinit> used to return the number
+of hash buckets that happen to be in use. If you still need that
+esoteric value, you can get it through the macro C<HvFILL(tb)>.
=item hv_iterkey
Performs an C<hv_iternext>, C<hv_iterkey>, and C<hv_iterval> in one
operation.
- SV * hv_iternextsv (HV* hv, char** key, I32* retlen)
+ SV* hv_iternextsv (HV* hv, char** key, I32* retlen)
=item hv_iterval
Returns the package name of a stash. See C<SvSTASH>, C<CvSTASH>.
- char *HvNAME (HV* stash)
+ char* HvNAME (HV* stash)
=item hv_store
Returns a boolean indicating whether the C C<char> is an ascii alphanumeric
character or digit.
- int isALNUM (char c)
+ int isALNUM (char c)
=item isALPHA
Returns a boolean indicating whether the C C<char> is an ascii alphabetic
character.
- int isALPHA (char c)
+ int isALPHA (char c)
=item isDIGIT
Returns a boolean indicating whether the C C<char> is an ascii digit.
- int isDIGIT (char c)
+ int isDIGIT (char c)
=item isLOWER
Returns a boolean indicating whether the C C<char> is a lowercase character.
- int isLOWER (char c)
+ int isLOWER (char c)
=item isSPACE
Returns a boolean indicating whether the C C<char> is whitespace.
- int isSPACE (char c)
+ int isSPACE (char c)
=item isUPPER
Returns a boolean indicating whether the C C<char> is an uppercase character.
- int isUPPER (char c)
+ int isUPPER (char c)
=item items
LEAVE;
+=item looks_like_number
+
+Test if an the content of an SV looks like a number (or is a number).
+
+ int looks_like_number(SV*)
+
+
=item MARK
Stack marker variable for the XSUB. See C<dMARK>.
source, C<d> is the destination, C<n> is the number of items, and C<t> is
the type. Can do overlapping moves. See also C<Copy>.
- (void) Move( s, d, n, t )
+ void Move( s, d, n, t )
=item na
The XSUB-writer's interface to the C C<malloc> function.
- void * New( x, void *ptr, int size, type )
+ void* New( x, void *ptr, int size, type )
-=item Newc
+=item newAV
-The XSUB-writer's interface to the C C<malloc> function, with cast.
+Creates a new AV. The reference count is set to 1.
- void * Newc( x, void *ptr, int size, type, cast )
+ AV* newAV (void)
-=item Newz
+=item Newc
-The XSUB-writer's interface to the C C<malloc> function. The allocated
-memory is zeroed with C<memzero>.
+The XSUB-writer's interface to the C C<malloc> function, with cast.
- void * Newz( x, void *ptr, int size, type )
+ void* Newc( x, void *ptr, int size, type, cast )
-=item newAV
+=item newCONSTSUB
-Creates a new AV. The reference count is set to 1.
+Creates a constant sub equivalent to Perl C<sub FOO () { 123 }>
+which is eligible for inlining at compile-time.
- AV* newAV (void)
+ void newCONSTSUB(HV* stash, char* name, SV* sv)
=item newHV
=item NEWSV
-Creates a new SV. The C<len> parameter indicates the number of bytes of
-preallocated string space the SV should have. The reference count for the
-new SV is set to 1. C<id> is an integer id between 0 and 1299 (used to
-identify leaks).
+Creates a new SV. A non-zero C<len> parameter indicates the number of
+bytes of preallocated string space the SV should have. An extra byte
+for a tailing NUL is also reserved. (SvPOK is not set for the SV even
+if string space is allocated.) The reference count for the new SV is
+set to 1. C<id> is an integer id between 0 and 1299 (used to identify
+leaks).
SV* NEWSV (int id, STRLEN len)
SV* newSVpv (char* s, STRLEN len)
+=item newSVpvf
+
+Creates a new SV an initialize it with the string formatted like
+C<sprintf>.
+
+ SV* newSVpvf(const char* pat, ...);
+
=item newSVpvn
Creates a new SV and copies a string into it. The reference count for the
Used by C<xsubpp> to hook up XSUBs as Perl subs. Adds Perl prototypes to
the subs.
+=item Newz
+
+The XSUB-writer's interface to the C C<malloc> function. The allocated
+memory is zeroed with C<memzero>.
+
+ void* Newz( x, void *ptr, int size, type )
+
=item Nullav
Null AV pointer.
Pops an integer off the stack.
- int POPi()
+ int POPi()
=item POPl
Pops a long off the stack.
- long POPl()
+ long POPl()
=item POPp
Pops a string off the stack.
- char * POPp()
+ char* POPp()
=item POPn
Pops a double off the stack.
- double POPn()
+ double POPn()
=item POPs
Pops an SV off the stack.
- SV* POPs()
+ SV* POPs()
=item PUSHMARK
Push an integer onto the stack. The stack must have room for this element.
Handles 'set' magic. See C<XPUSHi>.
- PUSHi(int d)
+ void PUSHi(int d)
=item PUSHn
Push a double onto the stack. The stack must have room for this element.
Handles 'set' magic. See C<XPUSHn>.
- PUSHn(double d)
+ void PUSHn(double d)
=item PUSHp
The C<len> indicates the length of the string. Handles 'set' magic. See
C<XPUSHp>.
- PUSHp(char *c, int len )
+ void PUSHp(char *c, int len )
=item PUSHs
Push an SV onto the stack. The stack must have room for this element. Does
not handle 'set' magic. See C<XPUSHs>.
- PUSHs(sv)
+ void PUSHs(sv)
+
+=item PUSHu
+
+Push an unsigned integer onto the stack. The stack must have room for
+this element. See C<XPUSHu>.
+
+ void PUSHu(unsigned int d)
+
=item PUTBACK
The XSUB-writer's interface to the C C<realloc> function.
- void * Renew( void *ptr, int size, type )
+ void* Renew( void *ptr, int size, type )
=item Renewc
The XSUB-writer's interface to the C C<realloc> function, with cast.
- void * Renewc( void *ptr, int size, type, cast )
+ void* Renewc( void *ptr, int size, type, cast )
=item RETVAL
Used to access elements on the XSUB's stack.
- SV* ST(int x)
+ SV* ST(int x)
=item strEQ
Test two strings to see if they are equal. Returns true or false.
- int strEQ( char *s1, char *s2 )
+ int strEQ( char *s1, char *s2 )
=item strGE
Test two strings to see if the first, C<s1>, is greater than or equal to the
second, C<s2>. Returns true or false.
- int strGE( char *s1, char *s2 )
+ int strGE( char *s1, char *s2 )
=item strGT
Test two strings to see if the first, C<s1>, is greater than the second,
C<s2>. Returns true or false.
- int strGT( char *s1, char *s2 )
+ int strGT( char *s1, char *s2 )
=item strLE
Test two strings to see if the first, C<s1>, is less than or equal to the
second, C<s2>. Returns true or false.
- int strLE( char *s1, char *s2 )
+ int strLE( char *s1, char *s2 )
=item strLT
Test two strings to see if the first, C<s1>, is less than the second,
C<s2>. Returns true or false.
- int strLT( char *s1, char *s2 )
+ int strLT( char *s1, char *s2 )
=item strNE
Test two strings to see if they are different. Returns true or false.
- int strNE( char *s1, char *s2 )
+ int strNE( char *s1, char *s2 )
=item strnEQ
Test two strings to see if they are equal. The C<len> parameter indicates
the number of bytes to compare. Returns true or false.
- int strnEQ( char *s1, char *s2 )
+ int strnEQ( char *s1, char *s2 )
=item strnNE
Test two strings to see if they are different. The C<len> parameter
indicates the number of bytes to compare. Returns true or false.
- int strnNE( char *s1, char *s2, int len )
+ int strnNE( char *s1, char *s2, int len )
=item sv_2mortal
void sv_catsv_mg (SV* dsv, SV* ssv)
+=item sv_chop
+
+Efficient removal of characters from the beginning of the string
+buffer. SvPOK(sv) must be true and the C<ptr> must be a pointer to
+somewhere inside the string buffer. The C<ptr> becomes the first
+character of the adjusted string.
+
+ void sv_chop(SV* sv, char *ptr)
+
+
=item sv_cmp
Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
Returns the length of the string which is in the SV. See C<SvLEN>.
- int SvCUR (SV* sv)
+ int SvCUR (SV* sv)
=item SvCUR_set
Set the length of the string which is in the SV. See C<SvCUR>.
- SvCUR_set (SV* sv, int val )
+ void SvCUR_set (SV* sv, int val )
=item sv_dec
void sv_dec (SV* sv)
+=item sv_derived_from
+
+Returns a boolean indicating whether the SV is a subclass of the
+specified class.
+
+ int sv_derived_from(SV* sv, char* class)
+
+=item sv_derived_from
+
+Returns a boolean indicating whether the SV is derived from the specified
+class. This is the function that implements C<UNIVERSAL::isa>. It works
+for class names as well as for objects.
+
+ bool sv_derived_from _((SV* sv, char* name));
+
=item SvEND
Returns a pointer to the last character in the string which is in the SV.
See C<SvCUR>. Access the character as
- *SvEND(sv)
+ char* SvEND(sv)
=item sv_eq
=item SvGROW
-Expands the character buffer in the SV. Calls C<sv_grow> to perform the
-expansion if necessary. Returns a pointer to the character buffer.
+Expands the character buffer in the SV so that it has room for the
+indicated number of bytes (remember to reserve space for an extra
+trailing NUL character). Calls C<sv_grow> to perform the expansion if
+necessary. Returns a pointer to the character buffer.
- char * SvGROW( SV* sv, int len )
+ char* SvGROW( SV* sv, int len )
=item sv_grow
void sv_inc (SV* sv)
+=item sv_insert
+
+Inserts a string at the specified offset/length within the SV.
+Similar to the Perl substr() function.
+
+ void sv_insert(SV *sv, STRLEN offset, STRLEN len,
+ char *str, STRLEN strlen)
+
=item SvIOK
Returns a boolean indicating whether the SV contains an integer.
- int SvIOK (SV* SV)
+ int SvIOK (SV* SV)
=item SvIOK_off
Unsets the IV status of an SV.
- SvIOK_off (SV* sv)
+ void SvIOK_off (SV* sv)
=item SvIOK_on
Tells an SV that it is an integer.
- SvIOK_on (SV* sv)
+ void SvIOK_on (SV* sv)
=item SvIOK_only
Tells an SV that it is an integer and disables all other OK bits.
- SvIOK_on (SV* sv)
+ void SvIOK_only (SV* sv)
=item SvIOKp
Returns a boolean indicating whether the SV contains an integer. Checks the
B<private> setting. Use C<SvIOK>.
- int SvIOKp (SV* SV)
+ int SvIOKp (SV* SV)
=item sv_isa
Returns a boolean indicating whether the SV is blessed into the specified
-class. This does not know how to check for subtype, so it doesn't work in
+class. This does not check for subtypes; use C<sv_derived_from> to verify
an inheritance relationship.
int sv_isa (SV* sv, char* name)
-=item SvIV
-
-Returns the integer which is in the SV.
-
- int SvIV (SV* sv)
-
=item sv_isobject
Returns a boolean indicating whether the SV is an RV pointing to a blessed
int sv_isobject (SV* sv)
+=item SvIV
+
+Returns the integer which is in the SV.
+
+ int SvIV (SV* sv)
+
=item SvIVX
Returns the integer which is stored in the SV.
- int SvIVX (SV* sv)
+ int SvIVX (SV* sv)
=item SvLEN
Returns the size of the string buffer in the SV. See C<SvCUR>.
- int SvLEN (SV* sv)
+ int SvLEN (SV* sv)
=item sv_len
SV* sv_mortalcopy (SV* oldsv)
-=item SvOK
-
-Returns a boolean indicating whether the value is an SV.
-
- int SvOK (SV* sv)
-
=item sv_newmortal
Creates a new SV which is mortal. The reference count of the SV is set to 1.
SV* sv_newmortal (void)
-=item sv_no
-
-This is the C<false> SV. See C<sv_yes>. Always refer to this as C<&sv_no>.
-
=item SvNIOK
Returns a boolean indicating whether the SV contains a number, integer or
double.
- int SvNIOK (SV* SV)
+ int SvNIOK (SV* SV)
=item SvNIOK_off
Unsets the NV/IV status of an SV.
- SvNIOK_off (SV* sv)
+ void SvNIOK_off (SV* sv)
=item SvNIOKp
Returns a boolean indicating whether the SV contains a number, integer or
double. Checks the B<private> setting. Use C<SvNIOK>.
- int SvNIOKp (SV* SV)
+ int SvNIOKp (SV* SV)
+
+=item sv_no
+
+This is the C<false> SV. See C<sv_yes>. Always refer to this as C<&sv_no>.
=item SvNOK
Returns a boolean indicating whether the SV contains a double.
- int SvNOK (SV* SV)
+ int SvNOK (SV* SV)
=item SvNOK_off
Unsets the NV status of an SV.
- SvNOK_off (SV* sv)
+ void SvNOK_off (SV* sv)
=item SvNOK_on
Tells an SV that it is a double.
- SvNOK_on (SV* sv)
+ void SvNOK_on (SV* sv)
=item SvNOK_only
Tells an SV that it is a double and disables all other OK bits.
- SvNOK_on (SV* sv)
+ void SvNOK_only (SV* sv)
=item SvNOKp
Returns a boolean indicating whether the SV contains a double. Checks the
B<private> setting. Use C<SvNOK>.
- int SvNOKp (SV* SV)
+ int SvNOKp (SV* SV)
=item SvNV
Returns the double which is stored in the SV.
- double SvNV (SV* sv)
+ double SvNV (SV* sv)
=item SvNVX
Returns the double which is stored in the SV.
- double SvNVX (SV* sv)
+ double SvNVX (SV* sv)
+
+=item SvOK
+
+Returns a boolean indicating whether the value is an SV.
+
+ int SvOK (SV* sv)
+
+=item SvOOK
+
+Returns a boolean indicating whether the SvIVX is a valid offset value
+for the SvPVX. This hack is used internally to speed up removal of
+characters from the beginning of a SvPV. When SvOOK is true, then the
+start of the allocated string buffer is really (SvPVX - SvIVX).
+
+ int SvOOK(Sv* sv)
=item SvPOK
Returns a boolean indicating whether the SV contains a character string.
- int SvPOK (SV* SV)
+ int SvPOK (SV* SV)
=item SvPOK_off
Unsets the PV status of an SV.
- SvPOK_off (SV* sv)
+ void SvPOK_off (SV* sv)
=item SvPOK_on
Tells an SV that it is a string.
- SvPOK_on (SV* sv)
+ void SvPOK_on (SV* sv)
=item SvPOK_only
Tells an SV that it is a string and disables all other OK bits.
- SvPOK_on (SV* sv)
+ void SvPOK_only (SV* sv)
=item SvPOKp
Returns a boolean indicating whether the SV contains a character string.
Checks the B<private> setting. Use C<SvPOK>.
- int SvPOKp (SV* SV)
+ int SvPOKp (SV* SV)
=item SvPV
if the SV does not contain a string. If C<len> is C<na> then Perl will
handle the length on its own. Handles 'get' magic.
- char * SvPV (SV* sv, int len )
+ char* SvPV (SV* sv, int len )
+
+=item SvPV_force
+
+Like <SvPV> but will force the SV into becoming a string (SvPOK). You
+want force if you are going to update the SvPVX directly.
+
+ char* SvPV_force(SV* sv, int len)
+
=item SvPVX
Returns a pointer to the string in the SV. The SV must contain a string.
- char * SvPVX (SV* sv)
+ char* SvPVX (SV* sv)
=item SvREFCNT
Returns the value of the object's reference count.
- int SvREFCNT (SV* sv)
+ int SvREFCNT (SV* sv)
=item SvREFCNT_dec
Decrements the reference count of the given SV.
- void SvREFCNT_dec (SV* sv)
+ void SvREFCNT_dec (SV* sv)
=item SvREFCNT_inc
Increments the reference count of the given SV.
- void SvREFCNT_inc (SV* sv)
+ void SvREFCNT_inc (SV* sv)
=item SvROK
Tests if the SV is an RV.
- int SvROK (SV* sv)
+ int SvROK (SV* sv)
=item SvROK_off
Unsets the RV status of an SV.
- SvROK_off (SV* sv)
+ void SvROK_off (SV* sv)
=item SvROK_on
Tells an SV that it is an RV.
- SvROK_on (SV* sv)
+ void SvROK_on (SV* sv)
=item SvRV
void SvSETMAGIC( SV *sv )
-=item SvTAINT
-
-Taints an SV if tainting is enabled
-
- SvTAINT (SV* sv)
-
-=item SvTAINTED
-
-Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if not.
-
- SvTAINTED (SV* sv)
-
-=item SvTAINTED_off
-
-Untaints an SV. Be I<very> careful with this routine, as it short-circuits
-some of Perl's fundamental security features. XS module authors should
-not use this function unless they fully understand all the implications
-of unconditionally untainting the value. Untainting should be done in
-the standard perl fashion, via a carefully crafted regexp, rather than
-directly untainting variables.
-
- SvTAINTED_off (SV* sv)
-
-=item SvTAINTED_on
-
-Marks an SV as tainted.
-
- SvTAINTED_on (SV* sv)
-
=item sv_setiv
Copies an integer into the given SV. Does not handle 'set' magic.
Returns the stash of the SV.
- HV * SvSTASH (SV* sv)
+ HV* SvSTASH (SV* sv)
+
+=item SvTAINT
+
+Taints an SV if tainting is enabled
+
+ void SvTAINT (SV* sv)
+
+=item SvTAINTED
+
+Checks to see if an SV is tainted. Returns TRUE if it is, FALSE if not.
+
+ int SvTAINTED (SV* sv)
+
+=item SvTAINTED_off
+
+Untaints an SV. Be I<very> careful with this routine, as it short-circuits
+some of Perl's fundamental security features. XS module authors should
+not use this function unless they fully understand all the implications
+of unconditionally untainting the value. Untainting should be done in
+the standard perl fashion, via a carefully crafted regexp, rather than
+directly untainting variables.
+
+ void SvTAINTED_off (SV* sv)
+
+=item SvTAINTED_on
+
+Marks an SV as tainted.
+
+ void SvTAINTED_on (SV* sv)
=item SVt_IV
Returns a boolean indicating whether Perl would evaluate the SV as true or
false, defined or undefined. Does not handle 'get' magic.
- int SvTRUE (SV* sv)
+ int SvTRUE (SV* sv)
=item SvTYPE
An enum of flags for Perl types. These are found in the file B<sv.h> in the
C<svtype> enum. Test these flags with the C<SvTYPE> macro.
-=item SvUPGRADE
-
-Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to perform
-the upgrade if necessary. See C<svtype>.
-
- bool SvUPGRADE (SV* sv, svtype mt)
-
-=item sv_upgrade
-
-Upgrade an SV to a more complex form. Use C<SvUPGRADE>. See C<svtype>.
-
=item sv_undef
This is the C<undef> SV. Always refer to this as C<&sv_undef>.
void sv_unref (SV* sv)
+=item SvUPGRADE
+
+Used to upgrade an SV to a more complex form. Uses C<sv_upgrade> to perform
+the upgrade if necessary. See C<svtype>.
+
+ bool SvUPGRADE (SV* sv, svtype mt)
+
+=item sv_upgrade
+
+Upgrade an SV to a more complex form. Use C<SvUPGRADE>. See C<svtype>.
+
=item sv_usepvn
Tells an SV to use C<ptr> to find its string value. Normally the string is
void sv_usepvn_mg (SV* sv, char* ptr, STRLEN len)
+=item sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, used_locale)
+
+Processes its arguments like C<vsprintf> and appends the formatted output
+to an SV. Uses an array of SVs if the C style variable argument list is
+missing (NULL). Indicates if locale information has been used for formatting.
+
+ void sv_catpvfn _((SV* sv, const char* pat, STRLEN patlen,
+ va_list *args, SV **svargs, I32 svmax,
+ bool *used_locale));
+
+=item sv_vsetpvfn(sv, pat, patlen, args, svargs, svmax, used_locale)
+
+Works like C<vcatpvfn> but copies the text into the SV instead of
+appending it.
+
+ void sv_setpvfn _((SV* sv, const char* pat, STRLEN patlen,
+ va_list *args, SV **svargs, I32 svmax,
+ bool *used_locale));
+
+=item SvUV
+
+Returns the unsigned integer which is in the SV.
+
+ UV SvUV(SV* sv)
+
+=item SvUVX
+
+Returns the unsigned integer which is stored in the SV.
+
+ UV SvUVX(SV* sv)
+
=item sv_yes
This is the C<true> SV. See C<sv_no>. Always refer to this as C<&sv_yes>.
Converts the specified character to lowercase.
- int toLOWER (char c)
+ int toLOWER (char c)
=item toUPPER
Converts the specified character to uppercase.
- int toUPPER (char c)
+ int toUPPER (char c)
=item warn
XPUSHs(sv)
+=item XPUSHu
+
+Push an unsigned integer onto the stack, extending the stack if
+necessary. See C<PUSHu>.
+
=item XS
Macro to declare an XSUB and its C parameter list. This is handled by
The XSUB-writer's interface to the C C<memzero> function. The C<d> is the
destination, C<n> is the number of items, and C<t> is the type.
- (void) Zero( d, n, t )
+ void Zero( d, n, t )
=back
-=head1 EDITOR
+=head1 AUTHORS
-Jeff Okamoto <F<okamoto@corp.hp.com>>
+Until May 1997, this document was maintained by Jeff Okamoto
+<okamoto@corp.hp.com>. It is now maintained as part of Perl itself.
With lots of help and suggestions from Dean Roehrich, Malcolm Beattie,
Andreas Koenig, Paul Hudson, Ilya Zakharevich, Paul Marquess, Neil
Bowers, Matthew Green, Tim Bunce, Spider Boardman, Ulrich Pfeifer,
Stephen McCamant, and Gurusamy Sarathy.
-API Listing by Dean Roehrich <F<roehrich@cray.com>>.
-
-=head1 DATE
-
-Version 31.8: 1997/5/17
+API Listing originally by Dean Roehrich <roehrich@cray.com>.
https://perl5.git.perl.org / perl5.git / blobdiff