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SL.xs
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#include "perl-jsonsl.h"
#include "jsonxs_inline.h"
/*
* JSON::SL, JSON::SL::Boolean
*/
#define MY_CXT_KEY "JSON::SL::_guts" XS_VERSION
typedef struct {
PLJSONSL* quick;
HV *stash_obj;
HV *stash_boolean;
HV *stash_tuba;
} my_cxt_t;
START_MY_CXT
static int PLJSONSL_Escape_Table_dfl[0x80];
#define ESCTBL PLJSONSL_Escape_Table_dfl
#define PLJSONSL_CROAK_USAGE(m) \
die("JSON::SL: %s %s", GvNAME(CvGV(cv)), m)
#ifdef PLJSONSL_HAVE_HV_COMMON
#define storeget_he(pjsn, hv, buf, len, value, is_utf8) \
hv_common((HV*)(hv), NULL, /*KEYSV*/ \
buf, len, \
((is_utf8)?HVhek_UTF8:0), /*flags*/\
HV_FETCH_ISSTORE, /*action*/ \
value, \
0 /* HASH (tell perl to compute) */)
#define delete_he(pjsn,hv,he) delete_he_THX(aTHX_ pjsn, hv, he)
static void
delete_he_THX(pTHX_ const PLJSONSL *dummy, HV* hv, HE* he)
{
char *kbuf;
STRLEN klen;
int is_utf8;
kbuf = HePV(he, klen);
is_utf8 = HeUTF8(he);
hv_common(hv, NULL, /* KEYSV */
kbuf, klen,
(is_utf8 ? HVhek_UTF8 : 0), /*flags*/
HV_DELETE|G_DISCARD, /*action*/
NULL, /* value */
HeHASH(he) /*hash value - already computed */);
}
#define PLJSONSL_INIT_KSV(blah)
#define PLJSONSL_DESTROY_KSV(blah)
#else
/* probably very dangerous, but the beginning of hv_store_common
* looks quite simple...
*/
#define CLOBBER_PV(sv,buf,len) \
SvCUR_set(sv, len); \
SvPVX(sv) = buf; \
SvUTF8_off(sv);
#define UNCLOBBER_PV(sv) \
SvCUR_set(sv, 0); \
SvPVX(sv) = NULL; \
#define PLJSONSL_INIT_KSV(pjsn) \
pjsn->ksv = newSV(16); \
pjsn->ksv_origpv = SvPVX(pjsn->ksv); \
SvLEN_set(pjsn->ksv, 0); \
SvPOK_on(pjsn->ksv);
#define PLJSONSL_DESTROY_KSV(pjsn) \
CLOBBER_PV(pjsn->ksv, pjsn->ksv_origpv, 0); \
SvREFCNT_dec(pjsn->ksv);
#define storeget_he(...) storeget_he_THX(aTHX_ __VA_ARGS__)
static HE*
storeget_he_THX(pTHX_ PLJSONSL *pjsn, HV *hv, const char *buf, size_t len,
SV *value, int is_utf8)
{
HE *ret;
CLOBBER_PV(pjsn->ksv, buf, len);
if (is_utf8) {
SvUTF8_on(pjsn->ksv);
}
ret = hv_store_ent(hv, pjsn->ksv, value, 0);
UNCLOBBER_PV(pjsn->ksv);
return ret;
}
#define delete_he(...) delete_he_THX(aTHX_ __VA_ARGS__)
static void
delete_he_THX(pTHX_ PLJSONSL *pjsn, HV *hv, HE* he)
{
char *kbuf;
STRLEN klen;
kbuf = HePV(he, klen);
CLOBBER_PV(pjsn->ksv, buf, len);
if (HeUTF8(he)) {
SvUTF8_on(pjsn->ksv);
}
(void)hv_delete_ent(hv, pjsn->ksv, G_DISCARD, HeHASH(he));
UNCLOBBER_PV(pjsn->ksv);
}
#endif /* HAVE_HV_COMMON */
#define REFDEC_FIELD(pjsn, fld) \
if (pjsn->fld != NULL) \
{ \
SvREFCNT_dec(pjsn->fld); \
pjsn->fld = NULL; \
} \
#define GET_STATE_BUFFER(pjsn, pos) \
(char*)(SvPVX(pjsn->buf) + (pos - pjsn->pos_min_valid))
#define PLJSONSL_NEWSVUV_fast(sv, val) \
sv = newSV(0); \
sv_upgrade(sv, SVt_IV); \
SvIOK_only(sv); \
SvUVX(sv) = val;
/**
* These 'common' functions are generic enough to work
* on all objects wiht a common pjsn head.
*/
#define pljsonsl_common_mknumeric(s,b,n) \
pljsonsl_common_mknumeric_THX(aTHX_ s,b,n)
static SV *
pljsonsl_common_mknumeric_THX(pTHX_
struct jsonsl_state_st *state,
const char *buf,
size_t nbuf)
{
#define die_numeric(err) \
die("JSON::SL - Malformed number (%s)", err);
SV *newsv;
switch (state->special_flags) {
/* Simple signed/unsigned numbers, no exponents or fractions to worry about */
case JSONSL_SPECIALf_UNSIGNED:
if (nbuf == 1) {
PLJSONSL_NEWSVUV_fast(newsv, state->nelem);
break;
} /* else, ndigits > 1 */
if (*buf == '0') { die_numeric("leading zero for non-fraction"); }
if (nbuf < (UV_DIG-1)) {
PLJSONSL_NEWSVUV_fast(newsv, state->nelem);
break;
} /* else, potential overflow */
newsv = jsonxs_inline_process_number(buf);
break;
case JSONSL_SPECIALf_SIGNED:
nbuf--;
if (nbuf == 0) { die_numeric("found lone '-'"); }
if (nbuf > 1 && buf[1] == '0') {
die_numeric("Leading 0 after '-'");
}
if (nbuf < (IV_DIG-1)) {
newsv = newSViv(-((IV)state->nelem));
break;
} /*else */
newsv = jsonxs_inline_process_number(buf);
break;
default:
if (state->special_flags & JSONSL_SPECIALf_NUMNOINT) {
newsv = jsonxs_inline_process_number(buf);
}
break;
}
return newsv;
#undef die_numeric
}
#define pljsonsl_common_mkboolean(pjsn_head, value) \
pljsonsl_common_mkboolean_THX(aTHX_ pjsn_head, value)
static SV *
pljsonsl_common_mkboolean_THX(pTHX_
PLJSONSL *pjsn_head,
jsonsl_special_t specialf)
{
SV *retsv, *ivsv;
ivsv = newSViv(specialf == JSONSL_SPECIALf_TRUE);
retsv = newRV_noinc(ivsv);
sv_bless(retsv, pjsn_head->stash_boolean);
return retsv;
}
#define pljsonsl_common_initialize(mycxt, pjsn_head, max_levels) \
pljsonsl_common_initialize_THX(aTHX_ mycxt, pjsn_head, max_levels)
static void
pljsonsl_common_initialize_THX(pTHX_
my_cxt_t *mycxt,
PLJSONSL *pjsn_head,
size_t max_levels)
{
pjsn_head->jsn = jsonsl_new(max_levels+2);
pjsn_head->jsn->data = pjsn_head;
pjsn_head->stash_boolean = mycxt->stash_boolean;
PLJSONSL_mkTHX(pjsn_head);
memcpy(pjsn_head->escape_table, ESCTBL, sizeof(ESCTBL));
}
#define process_special(pjsn,st) process_special_THX(aTHX_ pjsn,st)
static inline void
process_special_THX(pTHX_
PLJSONSL *pjsn,
struct jsonsl_state_st *state)
{
SV *newsv;
char *buf = GET_STATE_BUFFER(pjsn, state->pos_begin);
size_t poscur = pjsn->jsn->pos;
switch (state->special_flags) {
/* might look redundant, but is most common, so it's first */
case JSONSL_SPECIALf_UNSIGNED:
case JSONSL_SPECIALf_SIGNED:
newsv = pljsonsl_common_mknumeric(state,
buf,
poscur - state->pos_begin);
break;
case JSONSL_SPECIALf_TRUE:
case JSONSL_SPECIALf_FALSE:
newsv = pljsonsl_common_mkboolean(pjsn, state->special_flags);
break;
case JSONSL_SPECIALf_NULL:
newsv = newSV(0);
break;
default:
newsv = pljsonsl_common_mknumeric(state,
buf,
poscur - state->pos_begin);
break;
}
if (newsv == NULL) {
warn("Buffer is %p", buf);
warn("Length is %lu", poscur - state->pos_begin);
warn("Special flag is %d", state->special_flags);
die("WTF!");
}
state->sv = newsv;
return;
}
/**
* This is called to clean up any quotes, and possibly
* handle \u-escapes in the future
*/
#define process_string(pjsn,st) process_string_THX(aTHX_ pjsn,st)
static void
process_string_THX(pTHX_
PLJSONSL* pjsn,
struct jsonsl_state_st *state)
{
SV *retsv;
char *buf = GET_STATE_BUFFER(pjsn, state->pos_begin);
size_t buflen;
size_t poscur = pjsn->jsn->pos;
buf++;
buflen = (poscur - state->pos_begin) - 1;
retsv = newSV(buflen);
sv_upgrade(retsv, SVt_PV);
SvPOK_on(retsv);
if (state->nescapes == 0) {
SvCUR_set(retsv, buflen);
memcpy(SvPVX(retsv), buf, buflen);
} else {
jsonsl_error_t err;
jsonsl_special_t flags;
size_t newlen;
newlen = jsonsl_util_unescape_ex(buf,
SvPVX(retsv),
buflen,
pjsn->escape_table,
&flags,
&err, NULL);
if (!newlen) {
SvREFCNT_dec(retsv);
die("Could not unescape string: %s", jsonsl_strerror(err));
}
/* Shrink the buffer to the effective new size */
SvCUR_set(retsv, newlen);
if (flags & JSONSL_SPECIALf_NONASCII) {
SvUTF8_on(retsv);
}
}
state->sv = retsv;
if (pjsn->options.utf8) {
SvUTF8_on(state->sv);
}
}
/**
* This function will try and determine if the current
* item is a matched result (which should be returned to
* the user).
* If this is a complete match, the SV (along with relevant info)
* will be pushed to the result stack and return true. Returns
* false otherwise.
*/
#define object_mkresult(pjsn,st_p,st_c) object_mkresult_THX(aTHX_ pjsn, st_p,st_c)
static inline int
object_mkresult_THX(pTHX_
PLJSONSL *pjsn,
struct jsonsl_state_st *parent,
struct jsonsl_state_st *child)
{
#define STORE_INFO(b, v) \
(void)hv_stores(info_hv, PLJSONSL_INFO_KEY_##b, v)
HV *info_hv;
if (pjsn->options.object_drip == 0 &&
(child->matchres != JSONSL_MATCH_COMPLETE || child->type == JSONSL_T_HKEY)) {
return 0;
}
info_hv = newHV();
if (SvTYPE(child->sv) == SVt_PVHV || SvTYPE(child->sv) == SVt_PVAV) {
STORE_INFO(VALUE, newRV_noinc(child->sv));
} else {
STORE_INFO(VALUE, child->sv);
}
if (pjsn->options.noqstr == 0 && pjsn->options.object_drip == 0) {
STORE_INFO(QUERY, newSVpvn_share(child->matchjpr->orig,
child->matchjpr->norig, 0));
}
if (pjsn->options.nopath == 0) {
SV *pathstr;
int ii;
pathstr = newSVpvs("/");
for (ii = 2; ii <= (child->level); ii++) {
struct jsonsl_state_st *cur = pjsn->jsn->stack + ii;
struct jsonsl_state_st *prev = jsonsl_last_state(pjsn->jsn, cur);
if (prev->type == JSONSL_T_LIST) {
sv_catpvf(pathstr, "%d/", cur->u_loc.idx);
} else {
char *kbuf;
STRLEN klen;
assert(cur->u_loc.key);
kbuf = HePV(cur->u_loc.key, klen);
sv_catpvn(pathstr, kbuf, klen);
sv_catpvs(pathstr, "/");
if (HeKUTF8(cur->u_loc.key)) {
SvUTF8_on(pathstr);
}
}
}
/* Trim the trailing '/' from the path string */
if (SvCUR(pathstr) != 1) {
SvCUR_set(pathstr, SvCUR(pathstr)-1);
}
STORE_INFO(PATH, pathstr);
}
/**
* For the sake of allowing inspection of the object tree, array
* and hash types are always added to their parents, even if they
* are a complete match to be removed from the stack.
*/
if (parent && parent->sv) {
SvREADONLY_off(parent->sv);
SvREFCNT_inc_simple_void_NN(child->sv);
if (parent->type == JSONSL_T_LIST) {
SV *popped_sv = av_pop((AV*)parent->sv);
if (popped_sv) {
SvREFCNT_dec(popped_sv);
}
} else {
HE* child_he = child->u_loc.key;
SvREADONLY_off(HeVAL(child_he));
delete_he(pjsn, (HV*)parent->sv, child_he);
#if 0
/* for perls with hv_common, the above should be a macro for this: */
hv_common((HV*)parent->sv,
NULL, kbuf, klen,
0, /*maybe HVhek_UTF8?*/
HV_DELETE|G_DISCARD ,
NULL,
HeHASH(child->u_loc.key));
#endif
child->u_loc.key = NULL;
}
SvREADONLY_on(parent->sv);
SvREADONLY_off(child->sv);
}
av_push(pjsn->results, newRV_noinc((SV*)info_hv));
return 1;
#undef STORE_INFO
}
/**
* Because we only want to maintain 'complete' elements, for
* strings we ensure that their SVs do not get created until
* the entire string is done (as a partial string would
* not be of much use to the user anyway).
* The opposite is true of hashes and arrays, which we create
* immediately.
*/
static void body_push_callback(jsonsl_t jsn,
jsonsl_action_t action,
register struct jsonsl_state_st *state,
const char *at)
{
struct jsonsl_state_st *parent;
SV *newsv;
char *mkey;
size_t mnkey;
register PLJSONSL *pjsn = (PLJSONSL*)jsn->data;
PLJSONSL_dTHX(pjsn);
/* Reset the position first */
pjsn->keep_pos = state->pos_begin;
parent = jsonsl_last_state(jsn, state);
/* Here we set up parent positioning variables.. */
if (parent->type == JSONSL_T_OBJECT) {
if (state->type == JSONSL_T_HKEY) {
return;
}
assert(pjsn->curhk);
mkey = HeKEY(pjsn->curhk);
mnkey = HeKLEN(pjsn->curhk);
/**
* Set the HE of our current value to the current HK, and then
* remove curhk's visibility.
*/
state->u_loc.key = pjsn->curhk;
pjsn->curhk = NULL;
} else {
state->u_loc.idx = parent->nelem - 1;
mkey = NULL;
mnkey = state->u_loc.idx;
}
if (parent->matchres == JSONSL_MATCH_POSSIBLE) {
state->matchjpr = jsonsl_jpr_match_state(jsn, state, mkey, mnkey,
&state->matchres);
} else {
state->matchjpr = NULL;
state->matchres = JSONSL_MATCH_NOMATCH;
}
/**
* Ignore warnings about uninitialized newsv variable.
*/
if (!JSONSL_STATE_IS_CONTAINER(state)) {
return; /* nothing more to do here. String types are added at POP */
}
if (state->type == JSONSL_T_OBJECT) {
newsv = (SV*)newHV();
} else if (state->type == JSONSL_T_LIST) {
newsv = (SV*)newAV();
} else {
die("WTF");
}
SvREADONLY_on(newsv);
if (parent->type == JSONSL_T_LIST) {
SvREADONLY_off(parent->sv);
av_push((AV*)parent->sv, newRV_noinc(newsv));
SvREADONLY_on(parent->sv);
} else {
/* we have the HE. */
HeVAL(state->u_loc.key) = newRV_noinc(newsv);
SvREADONLY_on(HeVAL(state->u_loc.key));
}
state->sv = newsv;
}
/**
* Creates a new HE*. We use this HE later on using HeVAL to assign the value.
*/
#define create_hk(pjsn,st_c,st_p) create_hk_THX(aTHX_ pjsn,st_c,st_p)
static void
create_hk_THX(pTHX_ PLJSONSL *pjsn,
struct jsonsl_state_st *state,
struct jsonsl_state_st *parent)
{
char *buf = GET_STATE_BUFFER(pjsn, state->pos_begin);
size_t poscur = pjsn->jsn->pos;
STRLEN len = (poscur - state->pos_begin)-1;
assert(pjsn->curhk == NULL);
buf++;
SvREADONLY_off(parent->sv);
if (state->nescapes) {
/* we have escapes within a key. rare, but allowable. No choice
* but to allocate a new buffer for it
*/
/* This sets state->sv to the key sv. would be nice if there was a cleaner
* path to this
*/
process_string(pjsn, state);
pjsn->curhk = hv_store_ent((HV*)parent->sv, state->sv, &PL_sv_undef, 0);
SvREFCNT_dec(state->sv);
state->sv = NULL;
} else {
/**
* Fast path, no copying to new SV.
* We need to store &PL_sv_undef first to fool hv_common
* into thinking we're not doing anything special. Then
* we switch it out to &PL_sv_placeholder so it doesn't appear
* visible.
*/
pjsn->curhk = storeget_he(pjsn, parent->sv, buf, len, &PL_sv_undef,
/*determine if UTF8: */
pjsn->options.utf8 || state->special_flags == JSONSL_SPECIALf_NONASCII);
#if 0
/* which is really this: */
pjsn->curhk = hv_common((HV*)parent->sv, /* HV*/
NULL, /* keysv */
buf, len,
0, /* flags. Maybe setting utf8 */
HV_FETCH_ISSTORE, /*action*/
&PL_sv_undef, /*value*/
0);
#endif
}
HeVAL(pjsn->curhk) = &PL_sv_placeholder;
SvREADONLY_on(parent->sv);
}
/* forward-declare initial state handler */
static void initial_callback(jsonsl_t jsn,
jsonsl_action_t action,
struct jsonsl_state_st *state,
const char *at);
/**
* In this callback we ensure to clean up our strings and push it
* into the parent SV
*/
static void body_pop_callback(jsonsl_t jsn,
jsonsl_action_t action,
register struct jsonsl_state_st *state,
const char *at)
{
/* Ending of an element */
struct jsonsl_state_st *parent = jsonsl_last_state(jsn, state);
register PLJSONSL *pjsn = (PLJSONSL*)jsn->data;
PLJSONSL_dTHX(pjsn);
#define INSERT_STRING \
if (parent && object_mkresult(pjsn, parent, state) == 0) { \
SvREADONLY_off(parent->sv); \
if (parent->type == JSONSL_T_OBJECT) { \
assert(state->u_loc.key); \
HeVAL(state->u_loc.key) = state->sv; \
} else { \
av_push((AV*)parent->sv, state->sv); \
} \
SvREADONLY_on(parent->sv); \
} \
if (state->type == JSONSL_T_STRING) {
process_string(pjsn, state);
INSERT_STRING;
} else if (state->type == JSONSL_T_HKEY) {
assert(parent->type == JSONSL_T_OBJECT);
create_hk(pjsn, state, parent);
} else if (state->type == JSONSL_T_SPECIAL) {
assert(state->special_flags);
process_special(pjsn, state);
INSERT_STRING;
} else {
SvREADONLY_off(state->sv);
object_mkresult(pjsn, parent, state);
}
#undef INSERT_STRING
if (state->sv == pjsn->root) {
if (pjsn->njprs == 0 && pjsn->options.object_drip == 0) {
av_push(pjsn->results, newRV_noinc(pjsn->root));
} /* otherwise, already pushed */
pjsn->root = NULL;
jsn->action_callback_PUSH = initial_callback;
}
state->u_loc.idx = -1;
state->sv = NULL;
pjsn->keep_pos = 0;
}
static int error_callback(jsonsl_t jsn,
jsonsl_error_t err,
struct jsonsl_state_st *state,
char *at)
{
PLJSONSL *pjsn = (PLJSONSL*)jsn->data;
PLJSONSL_dTHX(pjsn);
/**
* TODO: allow option for user-defined recovery function
*/
die("JSON::SL - Got error %s at position %lu", jsonsl_strerror(err), jsn->pos);
return 0;
}
static void invoke_root_cb(PLJSONSL *pjsn)
{
PLJSONSL_dTHX(pjsn);
if (!pjsn->options.root_callback) {
return;
}
dSP;
ENTER;
SAVETMPS;
PUSHMARK(SP);
XPUSHs(sv_2mortal(newRV_inc(pjsn->root)));
PUTBACK;
call_sv(pjsn->options.root_callback, G_DISCARD);
FREETMPS;
LEAVE;
}
static void initial_callback(jsonsl_t jsn,
jsonsl_action_t action,
struct jsonsl_state_st *state,
const char *at)
{
PLJSONSL *pjsn = (PLJSONSL*)jsn->data;
PLJSONSL_dTHX(pjsn);
assert(action == JSONSL_ACTION_PUSH);
if (state->type == JSONSL_T_LIST) {
pjsn->root = (SV*)newAV();
} else if (state->type == JSONSL_T_OBJECT) {
pjsn->root = (SV*)newHV();
} else {
die("Found type %s as root element", jsonsl_strtype(state->type));
}
if (pjsn->options.root_callback) {
invoke_root_cb(pjsn);
}
state->sv = pjsn->root;
jsn->action_callback = NULL;
jsn->action_callback_PUSH = body_push_callback;
jsn->action_callback_POP = body_pop_callback;
jsonsl_jpr_match_state(jsn, state, NULL, 0, &state->matchres);
/* Mark root element as read only */
SvREADONLY_on(pjsn->root);
}
#define CHECK_MAX_SIZE(pjsn,input) \
if (pjsn->options.max_size && SvCUR(input) > pjsn->options.max_size) { \
die("JSON::SL - max_size is %lu, but input is %lu bytes", \
pjsn->options.max_size, SvCUR(input)); \
}
#define pljsonsl_feed_incr(pjsn,str) pljsonsl_feed_incr_THX(aTHX_ pjsn,str)
static void
pljsonsl_feed_incr_THX(pTHX_ PLJSONSL* pjsn, SV *input)
{
size_t start_pos = pjsn->jsn->pos;
STRLEN cur_len = SvCUR(pjsn->buf);
if (!SvPOK(input)) {
die("Input is not a string");
}
CHECK_MAX_SIZE(pjsn, input)
pjsn->pos_min_valid = pjsn->jsn->pos - cur_len;
if (SvUTF8(input)) {
pjsn->options.utf8 = 1;
}
sv_catpvn(pjsn->buf, SvPVX_const(input), SvCUR(input));
jsonsl_feed(pjsn->jsn,
SvPVX_const(pjsn->buf) + (SvCUR(pjsn->buf)-SvCUR(input)),
SvCUR(input));
/**
* Callbacks may detect the beginning of a string, in which case
* we need to ensure the continuity of the string. In this case
* pos_keep is set to the position of the input stream (not the SV *input,
* but rather jsn->pos) from which we should begin buffering data.
*
* Now we might need to chop. The amount of bytes to chop is the
* difference between start_pos and the keep_pos
* variable (if any)
*/
if (pjsn->keep_pos == 0) {
SvCUR_set(pjsn->buf, 0);
} else if (pjsn->keep_pos > start_pos) {
sv_chop(pjsn->buf, SvPVX_const(pjsn->buf) + (pjsn->keep_pos - start_pos));
}
}
static PLJSONSL*
pljsonsl_get_and_initialize_global(pTHX)
{
dMY_CXT;
PLJSONSL *pjsn;
if (MY_CXT.quick == NULL) {
Newxz(pjsn, 1, PLJSONSL);
pljsonsl_common_initialize(&MY_CXT, pjsn, PLJSONSL_MAX_DEFAULT-1);
pjsn->priv_global.is_global = 1;
PLJSONSL_INIT_KSV(pjsn);
MY_CXT.quick = pjsn;
}
pjsn = MY_CXT.quick;
jsonsl_reset(pjsn->jsn);
jsonsl_enable_all_callbacks(pjsn->jsn);
pjsn->jsn->error_callback = error_callback;
pjsn->jsn->action_callback_PUSH = initial_callback;
pjsn->results = (AV*)sv_2mortal((SV*)newAV());
return pjsn;
}
#define pljsonsl_feed_oneshot(pjsn,str) pljsonsl_feed_oneshot_THX(aTHX_ pjsn,str)
static void
pljsonsl_feed_oneshot_THX(pTHX_ PLJSONSL* pjsn, SV *input)
{
if (!SvPOK(input)) {
die("Input is not a string");
}
if (SvUTF8(input)) {
pjsn->options.utf8 = 1;
}
CHECK_MAX_SIZE(pjsn, input);
pjsn->buf = input;
jsonsl_feed(pjsn->jsn, SvPVX_const(input), SvCUR(input));
pjsn->buf = NULL;
pjsn->options.utf8 = 0;
/* the current root is never in the result stack..
* so mortalizing it won't hurt anyone.
*/
}
/**
* Takes an array ref (or list?) of JSONPointer strings and converts
* them to JPR objects. Dies on error
*/
#define pljsonsl_set_jsonpointer(pjsn,jprstr) \
pljsonsl_set_jsonpointer_THX(aTHX_ pjsn,jprstr)
static void
pljsonsl_set_jsonpointer_THX(pTHX_ PLJSONSL *pjsn, AV *paths)
{
jsonsl_jpr_t *jprs;
jsonsl_error_t err;
int ii;
int max = av_len(paths)+1;
const char *diestr, *pathstr;
if (!max) {
die("No paths given!");
}
Newxz(jprs, max, jsonsl_jpr_t);
for (ii = 0; ii < max; ii++) {
SV **tmpsv = av_fetch(paths, ii, 0);
if (tmpsv == NULL || SvPOK(*tmpsv) == 0) {
diestr = "Found empty path";
goto GT_ERR;
}
jprs[ii] = jsonsl_jpr_new(SvPVX_const(*tmpsv), &err);
if (jprs[ii] == NULL) {
pathstr = SvPVX_const(*tmpsv);
goto GT_ERR;
}
}
jsonsl_jpr_match_state_init(pjsn->jsn, jprs, max);
pjsn->jprs = jprs;
pjsn->njprs = max;
return;
GT_ERR:
for (ii = 0; ii < max; ii++) {
if (jprs[ii] == NULL) {
break;
}
jsonsl_jpr_destroy(jprs[ii]);
}
Safefree(jprs);
if (pathstr) {
die("Couldn't convert %s to jsonpointer: %s", pathstr, jsonsl_strerror(err));
} else {
die(diestr);
}
}
/**
* JSON::SL::Tuba functions.
* In case you haven't wondered already, 'Tuba' is a play on 'SAX'.
*/
/**
* This is our quick version of MRO caching. Maybe I'll swap this out
* for something which already exists (as I get the feeling I've reinveted
* the wheel here.
* namep is populated with the handler name, gvp is a pointer to the GV**
* - or an offset into the PLTUBA's methgv structure.
*/
static void
pltuba_get_method_info(PLTUBA *tuba,
jsonsl_action_t action,
pltuba_callback_type cbtype,
GV ***gvpp,
const char **namep)
{
GV **methgvp = NULL;
const char *methname = NULL;
cbtype &= 0x7f;
if (tuba->options.cb_unified) {
methname = "on_any";
methgvp = &tuba->methgv.on_any;
goto GT_RETASGN;
}
#define PLTUBA_METH_GETMETH
#include "srcout/tuba_dispatch_getmeth.h"
#undef PLTUBA_METH_GETMETH
GT_RETASGN:
if (gvpp) {
*gvpp = methgvp;
}
if (namep) {
*namep = methname;
}
}
static void
pltuba_invalidate_gvs_THX(pTHX_ PLTUBA *tuba)
{
#define X(action,type) \
REFDEC_FIELD(tuba, methgv.action## _ ##type)
PLTUBA_XMETHGV
#undef X
}
/**
* Maps a 'jsonsl' type to a tuba callback type.
*/
static pltuba_callback_type
convert_to_tuba_cbt(struct jsonsl_state_st *state)
{
if (state->type != JSONSL_T_SPECIAL) {
return state->type;
}
if (state->special_flags & JSONSL_SPECIALf_BOOLEAN) {
return PLTUBA_CALLBACK_BOOLEAN;
} else if (state->special_flags & (JSONSL_SPECIALf_NUMERIC | JSONSL_SPECIALf_DASH)) {
return PLTUBA_CALLBACK_NUMBER;
} else if (state->special_flags == JSONSL_SPECIALf_NULL) {
return PLTUBA_CALLBACK_NULL;
}
warn("Special flag is %d", state->special_flags);
die("wtf?");
return 0;
}
/**
* This function invokes the selected callback (if it exists).
*/
#define pltuba_invoke_callback(tb,a,cbt,sv) \
pltuba_invoke_callback_THX(aTHX_ tb,a,cbt,sv)
static void
pltuba_invoke_callback_THX(pTHX_ PLTUBA *tuba,
int action,
pltuba_callback_type cbtype,
SV *mextrasv)
{
dSP;
GV **methp = NULL;
GV *meth = NULL;
const char *meth_name = NULL;
int effective_type = cbtype;
int effective_action = action;
int stop_mro = 0;
/**
* If we are in a pop mode of a callback with the accumulator flag set,
* then we provide the data in the SV as the argument (maybe with some
* conversion into an appropriate object), otherwise, we just signal as
* normal.
*/
cbtype &= 0x7f;
if (tuba->accum && action == JSONSL_ACTION_POP) {
effective_action = PLTUBA_ACTION_ON;
pltuba_get_method_info(tuba, PLTUBA_ACTION_ON, cbtype, &methp, &meth_name);
assert(mextrasv == NULL);
mextrasv = tuba->accum;
tuba->accum = NULL;
} else {
pltuba_get_method_info(tuba, action, cbtype, &methp, &meth_name);
}
if (meth_name == NULL) {
die("Can't find method name. Action=%c, Type=%c", action, cbtype);
}
if (!mextrasv) {
mextrasv = &PL_sv_undef;
} else {
sv_2mortal(mextrasv);
}
assert(methp);
if (tuba->last_stash != SvSTASH(SvRV(tuba->selfrv))) {
pltuba_invalidate_gvs_THX(aTHX_ tuba);
tuba->last_stash = SvSTASH(SvRV(tuba->selfrv));
}
do {
if (*methp == NULL) {
meth = gv_fetchmethod_autoload(SvSTASH(SvRV(tuba->selfrv)), meth_name, 1);
if (meth && GvCV(meth)) {
if (tuba->options.no_cache_mro == 0) {
*methp = meth;
SvREFCNT_inc(meth);
}
break;
} /* else */
pltuba_get_method_info(tuba, PLTUBA_ACTION_ON,
PLTUBA_CALLBACK_ANY, &methp, &meth_name);
assert(methp && meth_name);
stop_mro++;
} else {
meth = *methp;
break;
}
} while (stop_mro < 2);
PLTUBA_SET_PARAMFIELDS_dv(tuba, Mode, effective_action);
PLTUBA_SET_PARAMFIELDS_dv(tuba, Type, effective_type);
/**
* We still want a SAVETMPS/FREETMPS pair active before we decide
* to call a function or not, as the contents mextrasv and possibly
* some of the hash values are mortalized.
*/
ENTER; SAVETMPS;
if (meth && GvCV(meth)) {
PUSHMARK(SP);
EXTEND(SP, 2);
PUSHs(tuba->selfrv);
PUSHs(tuba->paramhvrv);
if (mextrasv != &PL_sv_undef) {
XPUSHs(mextrasv);
}
PUTBACK;
call_sv((SV*)GvCV(meth), G_DISCARD);
} else {
if (!tuba->options.allow_unhandled) {
die("Tuba: Cannot find handler for mode 0x%02x action 0x%02x",
effective_action, effective_type);
}
}
FREETMPS; LEAVE;