mirror of git://git.psyced.org/git/psyclpc
318 lines
9.2 KiB
C
318 lines
9.2 KiB
C
/*------------------------------------------------------------------
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* Glue for libpsyc.
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*------------------------------------------------------------------
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* test LPC code:
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*
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// doesn't work with (int *) yet
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mixed* x = psyc_parse(":_context\ttest\n\n:_topic\ttesting\n_notice_test_libpsyc\nJust [_topic] libpsyc.\n|\n");
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mixed y = psyc_render(x);
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mixed z = ({ ([ "_context": "test" ]), ([ "_topic": "testing" ]), "_notice_test_libpsyc", "Just [_topic] libpsyc." });
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z = psyc_render(z);
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// psyc_render currently having some memory corruption problems
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debug_message(sprintf("libpsyc returned %O, %O and %O (%s)\n", x, y, z,
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y == z? "success": "FAIL!"));
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*
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*/
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#include "array.h"
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#include "interpret.h"
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#include "mapping.h"
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#include "mstrings.h"
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#include "object.h"
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#include "pkg-psyc.h"
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#include "simulate.h"
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#include "xalloc.h"
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#ifdef USE_PSYC
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# include "pkg-psyc.h"
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# include <stdio.h>
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# include <unistd.h>
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# include <fcntl.h>
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# include <psyc.h>
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# include <psyc/parse.h>
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# include <psyc/render.h>
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/*-------------------------------------------------------------------------*/
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// old: string psyc_render(mapping, mapping, string, int* | string);
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// new: string psyc_render(mixed*);
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svalue_t *
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f_psyc_render(svalue_t *sp) {
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mp_int i;
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vector_t *v;
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psycPacket packet;
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string_t *out;
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char *meth, *body;
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size_t mlen, blen;
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mapping_t *map;
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// unless (sp->type == T_POINTER) return sp;
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v = sp->u.vec;
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if ((i = (mp_int)VEC_SIZE(v)) != 1+PSYC_BODY) {
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errorf("Wrong number of elements (%"PRIdMPINT") in array argument to psyc_render()\n", i);
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/* NOTREACHED */
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return sp;
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}
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if (v->item[PSYC_ROUTING].type == T_MAPPING) {
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map = v->item[PSYC_ROUTING].u.map;
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} else {
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map = NULL;
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}
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#if 0
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if (v->item[PSYC_METHOD].type != T_STRING) {
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errorf("Wrong type for PSYC_METHOD element in PSYC packet.\n");
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/* NOTREACHED */
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return sp;
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}
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if (v->item[PSYC_BODY].type != T_STRING) {
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errorf("Wrong type for PSYC_BODY element in PSYC packet.\n");
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/* NOTREACHED */
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return sp;
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}
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#else
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if (v->item[PSYC_METHOD].type == T_STRING) {
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meth = get_txt(v->item[PSYC_METHOD].u.str);
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mlen = mstrsize(v->item[PSYC_METHOD].u.str);
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} else {
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meth = NULL;
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mlen = 0;
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}
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if (v->item[PSYC_BODY].type == T_STRING) {
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body = get_txt(v->item[PSYC_BODY].u.str);
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blen = mstrsize(v->item[PSYC_BODY].u.str);
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} else {
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body = NULL;
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blen = 0;
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}
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#endif
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// TODO: handle _lists
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// FIXME: handle mappings
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packet = psyc_newPacket2(NULL, 0, NULL, 0,
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meth, mlen, body, blen,
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PSYC_PACKET_CHECK_LENGTH);
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printf("rendering... packet.length = %ld\n", packet.length);
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// alloc_mstring creates an *untabled* string suitable for tmp data
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memsafe(out = alloc_mstring(packet.length), packet.length, "f_psyc_render");
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psyc_render(&packet, get_txt(out), packet.length);
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free_svalue(sp);
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put_string(sp, out);
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// stack should take care of freeing the string after use
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return sp;
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} /* f_psyc_render */
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/*-------------------------------------------------------------------------*/
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// mixed psyc_parse(int* | string);
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svalue_t *
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f_psyc_parse (svalue_t *sp) {
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string_t *str = NULL;
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vector_t *v;
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mapping_t *map;
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mp_int i;
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char oper = 0;
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psycString name = {0,0}, value = {0,0}, elem;
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psycParseListState listState;
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int ret;
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assert_shadow_sent(current_object);
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psyc_state_t *state = O_GET_PSYC_STATE(current_object);
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if (!state) {
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state = pxalloc(sizeof(psyc_state_t));
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if (!state) errorf("Out of memory for psyc state struct.\n");
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O_GET_PSYC_STATE(current_object) = state;
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memset(state, 0, sizeof(psyc_state_t));
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state->parser = pxalloc(sizeof(psycParseState));
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if (!state->parser) errorf("Out of memory for psyc parse state struct.\n");
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psyc_initParseState(state->parser);
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}
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i = 0;
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if (sp->type == T_POINTER) {
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errorf("\npsyc_parse got %ld int* bytes... not supported yet\n", i);
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}
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else if (sp->type == T_STRING) {
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printf("\npsyc_parse got a %ld bytes long string...\n", mstrsize(sp->u.str));
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psyc_setParseBuffer(state->parser, psyc_newString(get_txt(sp->u.str),
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mstrsize(sp->u.str)));
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}
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if (!state->packet) {
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state->packet = allocate_array(4);
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if (!state->packet) errorf("Out of memory for psyc_parse array.\n");
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}
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v = state->packet;
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map = allocate_mapping( 0, 1 ); // empty mapping
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if (!map) errorf("Out of memory for psyc_parse routing header.\n");
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put_mapping(&v->item[PSYC_ROUTING], map);
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map = allocate_mapping( 0, 1 ); // empty mapping
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if (!map) errorf("Out of memory for psyc_parse entity header.\n");
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put_mapping(&v->item[PSYC_ENTITY], map);
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do {
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svalue_t *sv;
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ret = psyc_parse(state->parser, &oper, &name, &value);
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if (state->remaining) {
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pfree(state->remaining);
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state->remaining = NULL;
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state->remaining_len = 0;
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}
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switch (ret) {
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case PSYC_PARSE_ENTITY_START: case PSYC_PARSE_BODY_START:
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// save oper, name & value in state at the start of incomplete entity or body
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state->oper = oper;
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state->name_len = name.length;
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state->name = pxalloc(name.length);
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memcpy(state->name, name.ptr, name.length);
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if (!state->name)
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errorf("Out of memory for name.\n");
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state->value_len = 0;
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// allocate memory for the total length of the value
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state->value = pxalloc(psyc_getParseValueLength(state->parser));
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if (!state->value)
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errorf("Out of memory for value.\n");
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// fall thru
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case PSYC_PARSE_ENTITY_CONT: case PSYC_PARSE_BODY_CONT:
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case PSYC_PARSE_ENTITY_END: case PSYC_PARSE_BODY_END:
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// append value to tmp buffer in state
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memcpy(state->value + state->value_len, value.ptr, value.length);
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state->value_len += value.length;
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}
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if (ret == PSYC_PARSE_ENTITY_END || ret == PSYC_PARSE_BODY_END) {
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// incomplete entity or body parsing done, set oper/name/value to the ones saved in state
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oper = state->oper;
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name.ptr = state->name;
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name.length = state->name_len;
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value.ptr = state->value;
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value.length = state->value_len;
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}
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switch (ret) {
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case PSYC_PARSE_ROUTING:
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if (oper != ':') {
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puts("_failure_unsupported_state");
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continue;
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}
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sv = pxalloc(sizeof(svalue_t));
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// new_n_tabled fetches a reference of a probably existing
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// shared string
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put_string(sv, new_n_tabled(name.ptr, name.length));
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sv = get_map_lvalue(v->item[PSYC_ROUTING].u.map, sv);
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// strings are capable of containing 0 so we can do this
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// for binary data too. let's use a tabled string even
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// for values of routing variables as they repeat a lot
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put_string(sv, new_n_tabled(value.ptr, value.length));
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break;
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case PSYC_PARSE_ENTITY_END:
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case PSYC_PARSE_ENTITY:
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if (oper != ':') {
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puts("_failure_unsupported_state");
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continue;
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}
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sv = pxalloc(sizeof(svalue_t));
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put_string(sv, new_n_tabled(name.ptr, name.length));
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sv = get_map_lvalue(v->item[PSYC_ENTITY].u.map, sv);
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// is it good to put entity variable values into the
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// shared string table? probably yes.. but it's a guess
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//t_string(sv, new_n_mstring(value.ptr, value.length));
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put_string(sv, new_n_tabled(value.ptr, value.length));
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// list parsing not supported yet.. TODO
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if (psyc_isListVar(&name)) {
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psyc_initParseListState(&listState);
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psyc_setParseListBuffer(&listState, value);
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elem = (psycString){0, 0};
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while ((ret = psyc_parseList(&listState, &value, &elem))) {
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switch (ret)
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{
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case PSYC_PARSE_LIST_END:
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case PSYC_PARSE_LIST_ELEM:
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// TODO: store elem
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//write(1, elem.ptr, elem.length);
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break;
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default:
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errorf("Error while parsing PSYC list: %i\n", ret);
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/* NOTREACHED */
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return sp;
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}
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if (ret == PSYC_PARSE_LIST_END)
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break;
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}
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}
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break;
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case PSYC_PARSE_BODY_END:
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case PSYC_PARSE_BODY:
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if (str) errorf("Got two PSYC methods in the same packet!?\n");
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// new_n_tabled gets the shared string for the method
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put_string(&v->item[PSYC_METHOD],
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new_n_tabled(name.ptr, name.length));
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// allocate an untabled string for the packet body
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put_string(&v->item[PSYC_BODY],
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new_n_mstring(value.ptr, value.length));
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break;
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case PSYC_PARSE_COMPLETE:
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state->packet = NULL;
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ret = 0;
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break;
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case PSYC_PARSE_INSUFFICIENT:
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// insufficient data, save remaining bytes
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state->remaining_len = psyc_getParseRemainingLength(state->parser);
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if (state->remaining_len) {
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state->remaining = pxalloc(state->remaining_len);
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memcpy(state->remaining,
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psyc_getParseRemainingBuffer(state->parser),
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state->remaining_len);
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} else
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state->remaining = NULL;
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//TODO: psyc_setRemainingBuffer2(state->parser, state->remaining, state->remaining_len);
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break;
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default:
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errorf("Error while parsing PSYC: %i\n", ret);
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/* NOTREACHED */
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return sp;
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}
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// free tmp buffers in state when incomplete entity or body parsing is done
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if (ret == PSYC_PARSE_ENTITY_END || ret == PSYC_PARSE_BODY_END) {
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oper = 0;
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if (state->name)
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pfree(state->name);
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state->name = NULL;
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state->name_len = 0;
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if (value.ptr)
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pfree((void*)value.ptr);
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state->value = NULL;
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state->value_len = 0;
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}
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} while (ret);
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free_svalue(sp);
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put_array(sp, v);
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state->packet = 0;
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return sp;
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} /* f_psyc_parse */
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#endif /* USE_PSYC */
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