/*
  *  ClamAV bytecode internal API
  *

  *  Copyright (C) 2009-2010 Sourcefire, Inc.

  *

  *  Authors: Török Edvin
  *

  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  *  MA 02110-1301, USA.
  */
 

 #ifdef HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 
 #ifdef HAVE_UNISTD_H

 #include <unistd.h>

 #endif

 #include <stdlib.h>

 #include <fcntl.h>
 #include <errno.h>

 #include <string.h>

 #include <math.h>

 #include <ctype.h>

 #include "cltypes.h"

 #include "clambc.h"

 #include "bytecode.h"

 #include "bytecode_priv.h"

 #include "type_desc.h"
 #include "bytecode_api.h"

 #include "bytecode_api_impl.h"

 #include "others.h"

 #include "pe.h"

 #include "pdf.h"

 #include "disasm.h"

 #include "scanners.h"

 #include "jsparse/js-norm.h"

 #include "hashtab.h"
 #include "str.h"
 #include "filetypes.h"

 #define EV ctx->bc_events
 
 #define STRINGIFY(x) #x
 #define TOSTRING(x) STRINGIFY(x)
 #define  API_MISUSE() cli_event_error_str(EV, "API misuse @" TOSTRING(__LINE__ ))
 

 uint32_t cli_bcapi_test1(struct cli_bc_ctx *ctx, uint32_t a, uint32_t b)

 {
     return (a==0xf00dbeef && b==0xbeeff00d) ? 0x12345678 : 0x55;
 }

 uint32_t cli_bcapi_test2(struct cli_bc_ctx *ctx, uint32_t a)
 {
     return a == 0xf00d ? 0xd00f : 0x5555;
 }
 

 int32_t cli_bcapi_read(struct cli_bc_ctx* ctx, uint8_t *data, int32_t size)
 {

     int n;

     if (!ctx->fmap) {
 	API_MISUSE();

 	return -1;

     }

     if (size < 0 || size > CLI_MAX_ALLOCATION) {

 	cli_warnmsg("bytecode: negative read size: %d\n", size);

 	API_MISUSE();

 	return -1;
     }
     n = fmap_readn(ctx->fmap, data, ctx->off, size);

     if (n <= 0) {

 	cli_dbgmsg("bcapi_read: fmap_readn failed (requested %d)\n", size);
 	cli_event_count(EV, BCEV_READ_ERR);

 	return n;

     }

     cli_event_int(EV, BCEV_OFFSET, ctx->off);
     cli_event_fastdata(EV, BCEV_READ, data, size);
     //cli_event_data(EV, BCEV_READ, data, n);

     ctx->off += n;
     return n;

 }
 
 int32_t cli_bcapi_seek(struct cli_bc_ctx* ctx, int32_t pos, uint32_t whence)
 {
     off_t off;

     if (!ctx->fmap) {
 	cli_dbgmsg("bcapi_seek: no fmap\n");

 	API_MISUSE();

 	return -1;

     }

     switch (whence) {
 	case 0:
 	    off = pos;
 	    break;
 	case 1:
 	    off = ctx->off + pos;
 	    break;
 	case 2:
 	    off = ctx->file_size + pos;
 	    break;

 	default:

 	    API_MISUSE();

 	    cli_dbgmsg("bcapi_seek: invalid whence value\n");
 	    return -1;

     }

     if (off < 0 || off > ctx->file_size) {
 	cli_dbgmsg("bcapi_seek: out of file: %ld (max %d)\n",
 		   off, ctx->file_size);

 	return -1;

     }

     cli_event_int(EV, BCEV_OFFSET, off);

     ctx->off = off;
     return off;
 }

 uint32_t cli_bcapi_debug_print_str(struct cli_bc_ctx *ctx, const uint8_t *str, uint32_t len)

 {

     cli_event_fastdata(EV, BCEV_DBG_STR, str, strlen((const char*)str));

     cli_dbgmsg("bytecode debug: %s\n", str);
     return 0;
 }
 

 uint32_t cli_bcapi_debug_print_uint(struct cli_bc_ctx *ctx, uint32_t a)

 {

     cli_event_int(EV, BCEV_DBG_INT, a);

     if (!cli_debug_flag)
 	return 0;
     return fprintf(stderr, "%d", a);

 }

 
 /*TODO: compiler should make sure that only constants are passed here, and not
  * pointers to arbitrary locations that may not be valid when bytecode finishes
  * executing */
 uint32_t cli_bcapi_setvirusname(struct cli_bc_ctx* ctx, const uint8_t *name, uint32_t len)
 {

     ctx->virname = (const char*)name;

     return 0;

 }

 
 uint32_t cli_bcapi_disasm_x86(struct cli_bc_ctx *ctx, struct DISASM_RESULT *res, uint32_t len)
 {

     int n;

     const unsigned char *buf;
     const unsigned char* next;

     if (!res || !ctx->fmap || ctx->off >= ctx->fmap->len) {
 	API_MISUSE();

 	return -1;

     }

     /* 32 should be longest instr we support decoding.
      * When we'll support mmx/sse instructions this should be updated! */
     n = MIN(32, ctx->fmap->len - ctx->off);

     buf = fmap_need_off_once(ctx->fmap, ctx->off, n);
     next = cli_disasm_one(buf, n, res, 0);

     if (!next) {
 	cli_dbgmsg("bcapi_disasm: failed\n");

 	cli_event_count(EV, BCEV_DISASM_FAIL);

 	return -1;

     }

     return ctx->off + next - buf;

 }
 

 /* TODO: field in ctx, id of last bytecode that called magicscandesc, reset
  * after hooks/other bytecodes are run. TODO: need a more generic solution
  * to avoid uselessly recursing on bytecode-unpacked files, but also a way to
  * override the limit if we need it in a special situation */

 int32_t cli_bcapi_write(struct cli_bc_ctx *ctx, uint8_t*data, int32_t len)
 {

     char err[128];

     int32_t res;

     cli_ctx *cctx = (cli_ctx*)ctx->ctx;
     if (len < 0) {
 	cli_warnmsg("Bytecode API: called with negative length!\n");

 	API_MISUSE();

 	return -1;
     }

     if (!ctx->outfd) {

 	ctx->tempfile = cli_gentemp(cctx ? cctx->engine->tmpdir : NULL);
 	if (!ctx->tempfile) {
 	    cli_dbgmsg("Bytecode API: Unable to allocate memory for tempfile\n");

 	    cli_event_error_oom(EV, 0);

 	    return -1;
 	}
 	ctx->outfd = open(ctx->tempfile, O_RDWR|O_CREAT|O_EXCL|O_TRUNC|O_BINARY, 0600);
 	if (ctx->outfd == -1) {

 	    ctx->outfd = 0;

 	    cli_warnmsg("Bytecode API: Can't create file %s: %s\n", ctx->tempfile, cli_strerror(errno, err, sizeof(err)));
 	    cli_event_error_str(EV, "cli_bcapi_write: Can't create temporary file");

 	    free(ctx->tempfile);
 	    return -1;
 	}

 	cli_dbgmsg("bytecode opened new tempfile: %s\n", ctx->tempfile);

     }

 
     cli_event_fastdata(ctx->bc_events, BCEV_WRITE, data, len);

     if (cli_checklimits("bytecode api", cctx, ctx->written + len, 0, 0))
 	return -1;
     res = cli_writen(ctx->outfd, data, len);
     if (res > 0) ctx->written += res;

     if (res == -1) {
 	cli_warnmsg("Bytecode API: write failed: %s\n", cli_strerror(errno, err, sizeof(err)));
 	cli_event_error_str(EV, "cli_bcapi_write: write failed");
     }

     return res;

 }
 

 void cli_bytecode_context_set_trace(struct cli_bc_ctx* ctx, unsigned level,

 				    bc_dbg_callback_trace trace,
 				    bc_dbg_callback_trace_op trace_op,

 				    bc_dbg_callback_trace_val trace_val,
 				    bc_dbg_callback_trace_ptr trace_ptr)

 {
     ctx->trace = trace;
     ctx->trace_op = trace_op;
     ctx->trace_val = trace_val;

     ctx->trace_ptr = trace_ptr;

     ctx->trace_level = level;
 }
 

 uint32_t cli_bcapi_trace_scope(struct cli_bc_ctx *ctx, const uint8_t *scope, uint32_t scopeid)

 {

     if (LIKELY(!ctx->trace_level))

 	return 0;

     if (ctx->scope != (const char*)scope) {
 	ctx->scope = (const char*)scope ? (const char*)scope : "?";

 	ctx->scopeid = scopeid;

 	ctx->trace_level |= 0x80;/* temporarely increase level to print params */
     } else if ((ctx->trace_level >= trace_scope) && ctx->scopeid != scopeid) {
 	ctx->scopeid = scopeid;
 	ctx->trace_level |= 0x40;/* temporarely increase level to print location */

     }

     return 0;

 }
 

 uint32_t cli_bcapi_trace_directory(struct cli_bc_ctx *ctx, const uint8_t* dir, uint32_t dummy)

 {

     if (LIKELY(!ctx->trace_level))

 	return 0;

     ctx->directory = (const char*)dir ? (const char*)dir : "";

     return 0;
 }
 

 uint32_t cli_bcapi_trace_source(struct cli_bc_ctx *ctx, const uint8_t *file, uint32_t line)

 {

     if (LIKELY(ctx->trace_level < trace_line))

 	return 0;

     if (ctx->file != (const char*)file || ctx->line != line) {
 	ctx->col = 0;
 	ctx->file =(const char*)file ? (const char*)file : "??";
 	ctx->line = line;

     }
     return 0;
 }
 

 uint32_t cli_bcapi_trace_op(struct cli_bc_ctx *ctx, const uint8_t *op, uint32_t col)

 {

     if (LIKELY(ctx->trace_level < trace_col))

 	return 0;

     if (ctx->trace_level&0xc0) {
 	ctx->col = col;
 	/* func/scope changed and they needed param/location event */
 	ctx->trace(ctx, (ctx->trace_level&0x80) ? trace_func : trace_scope);
 	ctx->trace_level &= ~0xc0;

     }

     if (LIKELY(ctx->trace_level < trace_col))
 	return 0;
     if (ctx->col != col) {
 	ctx->col = col;
 	ctx->trace(ctx, trace_col);
     } else {
 	ctx->trace(ctx, trace_line);

     }

     if (LIKELY(ctx->trace_level < trace_op))
 	return 0;
     if (ctx->trace_op && op)
 	ctx->trace_op(ctx, (const char*)op);

     return 0;
 }

 uint32_t cli_bcapi_trace_value(struct cli_bc_ctx *ctx, const uint8_t* name, uint32_t value)

 {

     if (LIKELY(ctx->trace_level < trace_val))

 	return 0;

     if (ctx->trace_level&0x80) {
 	if ((ctx->trace_level&0x7f) < trace_param)
 	    return 0;
 	ctx->trace(ctx, trace_param);
     }
     if (ctx->trace_val && name)

 	ctx->trace_val(ctx, (const char*)name, value);

     return 0;

 }

 uint32_t cli_bcapi_trace_ptr(struct cli_bc_ctx *ctx, const uint8_t* ptr, uint32_t dummy)

 {
     if (LIKELY(ctx->trace_level < trace_val))
 	return 0;
     if (ctx->trace_level&0x80) {
 	if ((ctx->trace_level&0x7f) < trace_param)
 	    return 0;
 	ctx->trace(ctx, trace_param);
     }
     if (ctx->trace_ptr)
 	ctx->trace_ptr(ctx, ptr);
     return 0;
 }

 uint32_t cli_bcapi_pe_rawaddr(struct cli_bc_ctx *ctx, uint32_t rva)

 {
   uint32_t ret;

   unsigned err = 0;

   const struct cli_pe_hook_data *pe = ctx->hooks.pedata;

   ret = cli_rawaddr(rva, ctx->sections, pe->nsections, &err,

 		    ctx->file_size, pe->hdr_size);

   if (err) {
     cli_dbgmsg("bcapi_pe_rawaddr invalid rva: %u\n", rva);

     return PE_INVALID_RVA;

   }

   return ret;
 }

 
 static inline const char* cli_memmem(const char *haystack, unsigned hlen,
 				     const unsigned char *needle, unsigned nlen)
 {
     const char *p;
     unsigned char c;

     if (!needle || !haystack) {

 	return NULL;

     }

     c = *needle++;
     if (nlen == 1)
 	return memchr(haystack, c, hlen);
 
     while (hlen >= nlen) {
 	p = haystack;
 	haystack = memchr(haystack, c, hlen - nlen + 1);
 	if (!haystack)
 	    return NULL;

 	hlen -= haystack+1 - p;

 	p = haystack + 1;
 	if (!memcmp(p, needle, nlen-1))
 	    return haystack;
 	haystack = p;
     }
     return NULL;
 }
 
 int32_t cli_bcapi_file_find(struct cli_bc_ctx *ctx, const uint8_t* data, uint32_t len)
 {

     fmap_t *map = ctx->fmap;
     if (!map || len <= 0) {
 	cli_dbgmsg("bcapi_file_find preconditions not met\n");

 	API_MISUSE();

 	return -1;
     }
     return cli_bcapi_file_find_limit(ctx, data, len, map->len);
 }
 
 int32_t cli_bcapi_file_find_limit(struct cli_bc_ctx *ctx , const uint8_t* data, uint32_t len, int32_t limit)
 {

     char buf[4096];
     fmap_t *map = ctx->fmap;

     uint32_t off = ctx->off;

     int n;
 

     if (!map || len > sizeof(buf)/4 || len <= 0 || limit <= 0) {
 	cli_dbgmsg("bcapi_file_find_limit preconditions not met\n");

 	API_MISUSE();

 	return -1;

     }

 
     cli_event_int(EV, BCEV_OFFSET, off);
     cli_event_fastdata(EV, BCEV_FIND, data, len);

     for (;;) {
 	const char *p;

 	int32_t readlen = sizeof(buf);
 	if (off + readlen > limit) {
 	    readlen = limit - off;
 	    if (readlen < 0)
 		return -1;
 	}
 	n = fmap_readn(map, buf, off, readlen);

 	if ((unsigned)n < len || n < 0)

 	    return -1;
 	p = cli_memmem(buf, n, data, len);
 	if (p)
 	    return off + p - buf;

 	off += n;

     }
     return -1;
 }
 

 int32_t cli_bcapi_file_byteat(struct cli_bc_ctx *ctx, uint32_t off)

 {
     unsigned char c;

     if (!ctx->fmap) {
 	cli_dbgmsg("bcapi_file_byteat: no fmap\n");

 	return -1;

     }

     cli_event_int(EV, BCEV_OFFSET, off);

     if (fmap_readn(ctx->fmap, &c, off, 1) != 1) {
 	cli_dbgmsg("bcapi_file_byteat: fmap_readn failed at %u\n", off);

 	return -1;

     }

     return c;
 }

 
 uint8_t* cli_bcapi_malloc(struct cli_bc_ctx *ctx, uint32_t size)
 {

     void *v;

 #if USE_MPOOL
     if (!ctx->mpool) {
 	ctx->mpool = mpool_create();
 	if (!ctx->mpool) {
 	    cli_dbgmsg("bytecode: mpool_create failed!\n");

 	    cli_event_error_oom(EV, 0);

 	    return NULL;
 	}
     }

     v = mpool_malloc(ctx->mpool, size);

 #else
     /* TODO: implement using a list of pointers we allocated! */
     cli_errmsg("cli_bcapi_malloc not implemented for systems without mmap yet!\n");

     v = cli_malloc(size);

 #endif

     if (!v)
 	cli_event_error_oom(EV, size);
     return v;

 }
 

 int32_t cli_bcapi_get_pe_section(struct cli_bc_ctx *ctx, void* section, uint32_t num)

 {
     if (num < ctx->hooks.pedata->nsections) {

 	memcpy(section, &ctx->sections[num], sizeof(struct cli_exe_section));

 	return 0;
     }
     return -1;
 }

 
 int32_t cli_bcapi_fill_buffer(struct cli_bc_ctx *ctx, uint8_t* buf,
 			      uint32_t buflen, uint32_t filled,
 			      uint32_t pos, uint32_t fill)
 {
     int32_t res, remaining, tofill;

     if (!buf || !buflen || buflen > CLI_MAX_ALLOCATION || filled > buflen) {
 	cli_dbgmsg("fill_buffer1\n");

 	API_MISUSE();

 	return -1;

     }
     if (ctx->off >= ctx->file_size) {
 	cli_dbgmsg("fill_buffer2\n");

 	API_MISUSE();

 	return 0;

     }

     remaining = filled - pos;
     if (remaining) {

 	if (!CLI_ISCONTAINED(buf, buflen, buf+pos, remaining)) {
 	    cli_dbgmsg("fill_buffer3\n");

 	    API_MISUSE();

 	    return -1;

 	}

 	memmove(buf, buf+pos, remaining);
     }
     tofill = buflen - remaining;

     if (!CLI_ISCONTAINED(buf, buflen, buf+remaining, tofill)) {
 	cli_dbgmsg("fill_buffer4\n");

 	API_MISUSE();

 	return -1;

     }

     res = cli_bcapi_read(ctx, buf+remaining, tofill);

     if (res <= 0) {
 	cli_dbgmsg("fill_buffer5\n");

 	API_MISUSE();

 	return res;

     }

     return remaining + res;
 }

 
 int32_t cli_bcapi_extract_new(struct cli_bc_ctx *ctx, int32_t id)
 {
     cli_ctx *cctx;

     int res = -1;

 
     cli_event_count(EV, BCEV_EXTRACTED);

     cli_dbgmsg("previous tempfile had %u bytes\n", ctx->written);
     if (!ctx->written)
 	return 0;

     if (ctx->ctx && cli_updatelimits(ctx->ctx, ctx->written))

 	return -1;
     ctx->written = 0;
     lseek(ctx->outfd, 0, SEEK_SET);
     cli_dbgmsg("bytecode: scanning extracted file %s\n", ctx->tempfile);
     cctx = (cli_ctx*)ctx->ctx;

     if (cctx) {

 	cli_file_t current = cctx->container_type;
 	if (ctx->containertype != CL_TYPE_ANY)
 	    cctx->container_type = ctx->containertype;

 	cctx->recursion++;

 	res = cli_magic_scandesc(ctx->outfd, cctx);

 	cctx->recursion--;

 	cctx->container_type = current;

 	if (res == CL_VIRUS) {

 	    ctx->virname = cli_get_last_virus(cctx);

 	    ctx->found = 1;

 	}

     }

     if ((cctx && cctx->engine->keeptmp) ||
 	(ftruncate(ctx->outfd, 0) == -1)) {
 
 	close(ctx->outfd);

 	if (!(cctx && cctx->engine->keeptmp) && ctx->tempfile)

 	    cli_unlink(ctx->tempfile);
 	free(ctx->tempfile);
 	ctx->tempfile = NULL;
 	ctx->outfd = 0;
     }
     cli_dbgmsg("bytecode: extracting new file with id %u\n", id);
     return res;
 }

 
 #define BUF 16
 int32_t cli_bcapi_read_number(struct cli_bc_ctx *ctx, uint32_t radix)
 {
     unsigned i;

     char *p;

     int32_t result;
 

     if ((radix != 10 && radix != 16) || !ctx->fmap)

 	return -1;

     cli_event_int(EV, BCEV_OFFSET, ctx->off);

     while ((p = fmap_need_off_once(ctx->fmap, ctx->off, BUF))) {
 	for (i=0;i<BUF;i++) {
 	    if (p[i] >= '0' && p[i] <= '9') {

 		char *endptr;

 		p = fmap_need_ptr_once(ctx->fmap, p+i, 16);
 		if (!p)
 		    return -1;
 		result = strtoul(p, &endptr, radix);
 		ctx->off += i + (endptr - p);
 		return result;
 	    }
 	}
 	ctx->off += BUF;
     }
     return -1;
 }
 

 int32_t cli_bcapi_hashset_new(struct cli_bc_ctx *ctx )
 {

     unsigned  n = ctx->nhashsets+1;
     struct cli_hashset *s = cli_realloc(ctx->hashsets, sizeof(*ctx->hashsets)*n);

     if (!s) {
 	cli_event_error_oom(EV, 0);

 	return -1;

     }

     ctx->hashsets = s;
     ctx->nhashsets = n;
     s = &s[n-1];
     cli_hashset_init(s, 16, 80);
     return n-1;
 }
 
 static struct cli_hashset *get_hashset(struct cli_bc_ctx *ctx, int32_t id)
 {

     if (id < 0 || id >= ctx->nhashsets || !ctx->hashsets) {
 	API_MISUSE();

 	return NULL;

     }

     return &ctx->hashsets[id];

 }

 int32_t cli_bcapi_hashset_add(struct cli_bc_ctx *ctx , int32_t id, uint32_t key)
 {

     struct cli_hashset *s = get_hashset(ctx, id);
     if (!s)
 	return -1;
     return cli_hashset_addkey(s, key);

 }

 int32_t cli_bcapi_hashset_remove(struct cli_bc_ctx *ctx , int32_t id, uint32_t key)
 {

     struct cli_hashset *s = get_hashset(ctx, id);
     if (!s)
 	return -1;

     return cli_hashset_removekey(s, key);

 }

 int32_t cli_bcapi_hashset_contains(struct cli_bc_ctx *ctx , int32_t id, uint32_t key)
 {

     struct cli_hashset *s = get_hashset(ctx, id);
     if (!s)

 	return -1;

     return cli_hashset_contains(s, key);
 }
 
 int32_t cli_bcapi_hashset_empty(struct cli_bc_ctx *ctx, int32_t id)
 {
     struct cli_hashset *s = get_hashset(ctx, id);
     return !s->count;

 }

 int32_t cli_bcapi_hashset_done(struct cli_bc_ctx *ctx , int32_t id)
 {

     struct cli_hashset *s = get_hashset(ctx, id);
     if (!s)
 	return -1;
     cli_hashset_destroy(s);

     if (id == ctx->nhashsets-1) {
 	ctx->nhashsets--;

 	if (!ctx->nhashsets) {
 	    free(ctx->hashsets);
 	    ctx->hashsets = NULL;
 	} else {
 	    s = cli_realloc(ctx->hashsets, ctx->nhashsets*sizeof(*s));
 	    if (s)
 		ctx->hashsets = s;
 	}

     }

     return 0;

 }
 

 int32_t cli_bcapi_buffer_pipe_new(struct cli_bc_ctx *ctx, uint32_t size)

 {

     unsigned char *data;
     struct bc_buffer *b;
     unsigned n = ctx->nbuffers + 1;
 

     data = cli_calloc(1, size);

     if (!data)
 	return -1;
     b = cli_realloc(ctx->buffers, sizeof(*ctx->buffers)*n);
     if (!b) {
 	free(data);
 	return -1;
     }
     ctx->buffers = b;
     ctx->nbuffers = n;
     b = &b[n-1];
 
     b->data = data;
     b->size = size;
     b->write_cursor = b->read_cursor = 0;
     return n-1;
 }
 
 int32_t cli_bcapi_buffer_pipe_new_fromfile(struct cli_bc_ctx *ctx , uint32_t at)
 {
     struct bc_buffer *b;
     unsigned n = ctx->nbuffers + 1;
 
     if (at >= ctx->file_size)
 	return -1;
 
     b = cli_realloc(ctx->buffers, sizeof(*ctx->buffers)*n);
     if (!b) {
 	return -1;
     }
     ctx->buffers = b;
     ctx->nbuffers = n;

     b = &b[n-1];

 
     /* NULL data means read from file at pos read_cursor */
     b->data = NULL;
     b->size = 0;
     b->read_cursor = at;
     b->write_cursor = 0;

     return n-1;

 }
 
 static struct bc_buffer *get_buffer(struct cli_bc_ctx *ctx, int32_t id)
 {

     if (!ctx->buffers || id < 0 || id >= ctx->nbuffers) {
 	cli_dbgmsg("bytecode api: invalid buffer id %u\n", id);

 	return NULL;

     }

     return &ctx->buffers[id];
 }
 
 uint32_t cli_bcapi_buffer_pipe_read_avail(struct cli_bc_ctx *ctx , int32_t id)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b)
 	return 0;
     if (b->data) {
 	if (b->write_cursor <= b->read_cursor)
 	    return 0;
 	return b->write_cursor - b->read_cursor;
     }

     if (!ctx->fmap || b->read_cursor >= ctx->file_size)

 	return 0;

     if (b->read_cursor + BUFSIZ <= ctx->file_size)

 	return BUFSIZ;

     return ctx->file_size - b->read_cursor;

 }
 
 uint8_t* cli_bcapi_buffer_pipe_read_get(struct cli_bc_ctx *ctx , int32_t id, uint32_t size)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b || size > cli_bcapi_buffer_pipe_read_avail(ctx, id) || !size)
 	return NULL;
     if (b->data)
 	return b->data + b->read_cursor;
     return fmap_need_off(ctx->fmap, b->read_cursor, size);
 }
 
 int32_t cli_bcapi_buffer_pipe_read_stopped(struct cli_bc_ctx *ctx , int32_t id, uint32_t amount)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b)
 	return -1;
     if (b->data) {
 	if (b->write_cursor <= b->read_cursor)
 	    return -1;
 	if (b->read_cursor + amount > b->write_cursor)
 	    b->read_cursor = b->write_cursor;
 	else
 	    b->read_cursor += amount;
 	if (b->read_cursor >= b->size &&
 	    b->write_cursor >= b->size)
 	    b->read_cursor = b->write_cursor = 0;
 	return 0;
     }
     b->read_cursor += amount;
     return 0;
 }
 
 uint32_t cli_bcapi_buffer_pipe_write_avail(struct cli_bc_ctx *ctx, int32_t id)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b)
 	return 0;
     if (!b->data)
 	return 0;
     if (b->write_cursor >= b->size)
 	return 0;
     return b->size - b->write_cursor;
 }
 
 uint8_t* cli_bcapi_buffer_pipe_write_get(struct cli_bc_ctx *ctx, int32_t id, uint32_t size)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b || size > cli_bcapi_buffer_pipe_write_avail(ctx, id) || !size)
 	return NULL;
     if (!b->data)
 	return NULL;
     return b->data + b->write_cursor;
 }
 
 int32_t cli_bcapi_buffer_pipe_write_stopped(struct cli_bc_ctx *ctx , int32_t id, uint32_t size)
 {
     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b || !b->data)
 	return -1;
     if (b->write_cursor + size >= b->size)
 	b->write_cursor = b->size;
     else
 	b->write_cursor += size;
     return 0;
 }
 
 int32_t cli_bcapi_buffer_pipe_done(struct cli_bc_ctx *ctx , int32_t id)
 {

     struct bc_buffer *b = get_buffer(ctx, id);
     if (!b)
 	return -1;
     free(b->data);
     b->data = NULL;
     return -0;

 }
 
 int32_t cli_bcapi_inflate_init(struct cli_bc_ctx *ctx, int32_t from, int32_t to, int32_t windowBits)
 {
     int ret;
     z_stream stream;
     struct bc_inflate *b;
     unsigned n = ctx->ninflates + 1;

     if (!get_buffer(ctx, from) || !get_buffer(ctx, to)) {
 	cli_dbgmsg("bytecode api: inflate_init: invalid buffers!\n");

 	return -1;

     }

     memset(&stream, 0, sizeof(stream));
     ret = inflateInit2(&stream, windowBits);
     switch (ret) {
 	case Z_MEM_ERROR:
 	    cli_dbgmsg("bytecode api: inflateInit2: out of memory!\n");
 	    return -1;
 	case Z_VERSION_ERROR:
 	    cli_dbgmsg("bytecode api: inflateinit2: zlib version error!\n");
 	    return -1;
 	case Z_STREAM_ERROR:
 	    cli_dbgmsg("bytecode api: inflateinit2: zlib stream error!\n");
 	    return -1;
 	case Z_OK:
 	    break;
 	default:
 	    cli_dbgmsg("bytecode api: inflateInit2: unknown error %d\n", ret);
 	    return -1;
     }
 
     b = cli_realloc(ctx->inflates, sizeof(*ctx->inflates)*n);
     if (!b) {
 	inflateEnd(&stream);

 	return -1;

     }
     ctx->inflates = b;
     ctx->ninflates = n;
     b = &b[n-1];
 
     b->from = from;
     b->to = to;
     b->needSync = 0;
     memcpy(&b->stream, &stream, sizeof(stream));
     return n-1;

 }
 

 static struct bc_inflate *get_inflate(struct cli_bc_ctx *ctx, int32_t id)

 {

     if (id < 0 || id >= ctx->ninflates || !ctx->inflates)
 	return NULL;
     return &ctx->inflates[id];
 }
 
 int32_t cli_bcapi_inflate_process(struct cli_bc_ctx *ctx , int32_t id)
 {
     int ret;
     unsigned avail_in_orig, avail_out_orig;
     struct bc_inflate *b = get_inflate(ctx, id);

     if (!b || b->from == -1 || b->to == -1)

 	return -1;
 
     b->stream.avail_in = avail_in_orig =
 	cli_bcapi_buffer_pipe_read_avail(ctx, b->from);
 
     b->stream.next_in = cli_bcapi_buffer_pipe_read_get(ctx, b->from,
 						       b->stream.avail_in);
 
     b->stream.avail_out = avail_out_orig =
 	cli_bcapi_buffer_pipe_write_avail(ctx, b->to);
 
     b->stream.next_out = cli_bcapi_buffer_pipe_write_get(ctx, b->to,
 							 b->stream.avail_out);
 

     if (!b->stream.avail_in || !b->stream.avail_out || !b->stream.next_in || !b->stream.next_out)

 	return -1;

     /* try hard to extract data, skipping over corrupted data */
     do {
 	if (!b->needSync) {
 	    ret = inflate(&b->stream, Z_NO_FLUSH);
 	    if (ret == Z_DATA_ERROR) {

 		cli_dbgmsg("bytecode api: inflate at %lu: %s, trying to recover\n", b->stream.total_in,

 			   b->stream.msg);
 		b->needSync = 1;
 	    }
 	}
 	if (b->needSync) {
 	    ret = inflateSync(&b->stream);
 	    if (ret == Z_OK) {

 		cli_dbgmsg("bytecode api: successfully recovered inflate stream\n");

 		b->needSync = 0;
 		continue;
 	    }
 	}
 	break;
     } while (1);
     cli_bcapi_buffer_pipe_read_stopped(ctx, b->from, avail_in_orig - b->stream.avail_in);
     cli_bcapi_buffer_pipe_write_stopped(ctx, b->to, avail_out_orig - b->stream.avail_out);
 
     if (ret == Z_MEM_ERROR) {
 	cli_dbgmsg("bytecode api: out of memory!\n");
 	cli_bcapi_inflate_done(ctx, id);
 	return ret;
     }
     if (ret == Z_STREAM_END) {
 	cli_bcapi_inflate_done(ctx, id);
     }
     if (ret == Z_BUF_ERROR) {
 	cli_dbgmsg("bytecode api: buffer error!\n");
     }
 
     return ret;

 }
 
 int32_t cli_bcapi_inflate_done(struct cli_bc_ctx *ctx , int32_t id)
 {

     int ret;
     struct bc_inflate *b = get_inflate(ctx, id);
     if (!b || b->from == -1 || b->to == -1)

 	return -1;

     ret = inflateEnd(&b->stream);
     if (ret == Z_STREAM_ERROR)
 	cli_dbgmsg("bytecode api: inflateEnd: %s\n", b->stream.msg);
     b->from = b->to = -1;
     return ret;

 }

 int32_t cli_bcapi_bytecode_rt_error(struct cli_bc_ctx *ctx , int32_t id)
 {
     int32_t line = id >> 8;
     int32_t col = id&0xff;
     cli_warnmsg("Bytecode runtime error at line %u, col %u\n", line, col);
     return 0;
 }
 

 int32_t cli_bcapi_jsnorm_init(struct cli_bc_ctx *ctx, int32_t from)
 {
     struct parser_state *state;
     struct bc_jsnorm *b;
     unsigned  n = ctx->njsnorms + 1;
     if (!get_buffer(ctx, from)) {
 	cli_dbgmsg("bytecode api: jsnorm_init: invalid buffers!\n");
 	return -1;
     }
     state = cli_js_init();
     if (!state)
 	return -1;
     b = cli_realloc(ctx->jsnorms, sizeof(*ctx->jsnorms)*n);
     if (!b) {
 	cli_js_destroy(state);
 	return -1;
     }
     ctx->jsnorms = b;
     ctx->njsnorms = n;
     b = &b[n-1];
     b->from = from;
     b->state = state;
     if (!ctx->jsnormdir) {
 	cli_ctx *cctx = (cli_ctx*)ctx->ctx;
 	ctx->jsnormdir = cli_gentemp(cctx ? cctx->engine->tmpdir : NULL);
 	if (ctx->jsnormdir) {
 	    if (mkdir(ctx->jsnormdir, 0700)) {
 		cli_dbgmsg("js: can't create temp dir %s\n", ctx->jsnormdir);
 		free(ctx->jsnormdir);
 		return CL_ETMPDIR;
 	    }
 	}
     }
     return n-1;
 }
 
 static struct bc_jsnorm *get_jsnorm(struct cli_bc_ctx *ctx, int32_t id)
 {
     if (id < 0 || id >= ctx->njsnorms || !ctx->jsnorms)
 	return NULL;
     return &ctx->jsnorms[id];
 }
 
 int32_t cli_bcapi_jsnorm_process(struct cli_bc_ctx *ctx, int32_t id)
 {
     unsigned avail;

     unsigned char *in;

     cli_ctx *cctx = ctx->ctx;
     struct bc_jsnorm *b = get_jsnorm(ctx, id);
     if (!b || b->from == -1 || !b->state)
 	return -1;
 
     avail = cli_bcapi_buffer_pipe_read_avail(ctx, b->from);
     in = cli_bcapi_buffer_pipe_read_get(ctx, b->from, avail);
     if (!avail || !in)
 	return -1;
     if (cctx && cli_checklimits("bytecode js api", cctx, ctx->jsnormwritten + avail, 0, 0))
 	return -1;
     cli_bcapi_buffer_pipe_read_stopped(ctx, b->from, avail);

     cli_js_process_buffer(b->state, (char*)in, avail);

     return 0;
 }
 
 int32_t cli_bcapi_jsnorm_done(struct cli_bc_ctx *ctx , int32_t id)
 {
     struct bc_jsnorm *b = get_jsnorm(ctx, id);
     if (!b || b->from == -1)
 	return -1;
     if (ctx->ctx && cli_updatelimits(ctx->ctx, ctx->jsnormwritten))
 	return -1;
     ctx->jsnormwritten = 0;
     cli_js_parse_done(b->state);
     cli_js_output(b->state, ctx->jsnormdir);
     cli_js_destroy(b->state);
     b->from = -1;
     return 0;
 }

 static inline double myround(double a)
 {
     if (a < 0)
 	return a-0.5;
     return a+0.5;
 }
 

 int32_t cli_bcapi_ilog2(struct cli_bc_ctx *ctx, uint32_t a, uint32_t b)
 {
     double f;
     if (!b)
 	return 0x7fffffff;
     /* log(a/b) is -32..32, so 2^26*32=2^31 covers the entire range of int32 */
     f = (1<<26)*log((double)a / b) / log(2);

     return (int32_t)myround(f);

 }
 
 int32_t cli_bcapi_ipow(struct cli_bc_ctx *ctx, int32_t a, int32_t b, int32_t c)
 {
     if (!a && b < 0)
 	return 0x7fffffff;

     return (int32_t)myround(c*pow(a,b));

 }
 

 uint32_t cli_bcapi_iexp(struct cli_bc_ctx *ctx, int32_t a, int32_t b, int32_t c)

 {
     double f;
     if (!b)
 	return 0x7fffffff;
     f= c*exp((double)a/b);

     return (uint32_t)myround(f);

 }
 
 int32_t cli_bcapi_isin(struct cli_bc_ctx *ctx, int32_t a, int32_t b, int32_t c)
 {
     double f;
     if (!b)
 	return 0x7fffffff;
     f = c*sin((double)a/b);

     return (int32_t)myround(f);

 }
 
 int32_t cli_bcapi_icos(struct cli_bc_ctx *ctx, int32_t a, int32_t b, int32_t c)
 {
     double f;
     if (!b)
 	return 0x7fffffff;
     f = c*cos((double)a/b);

     return (int32_t)myround(f);

 }
 
 int32_t cli_bcapi_memstr(struct cli_bc_ctx *ctx, const uint8_t* h, int32_t hs,
 			 const uint8_t*n, int32_t ns)
 {
     const uint8_t *s;

     if (!h || !n || hs < 0 || ns < 0) {
 	API_MISUSE();

 	return -1;

     }
     cli_event_fastdata(EV, BCEV_MEM_1, h, hs);
     cli_event_fastdata(EV, BCEV_MEM_2, n, ns);

     s = (const uint8_t*) cli_memstr((const char*)h, hs, (const char*)n, ns);

     if (!s)
 	return -1;
     return s - h;
 }
 
 int32_t cli_bcapi_hex2ui(struct cli_bc_ctx *ctx, uint32_t ah, uint32_t bh)
 {

     char result = 0;

     unsigned char in[2];
     in[0] = ah;
     in[1] = bh;
 

     if (cli_hex2str_to((const char*)in, &result, 2) == -1)

 	return -1;
     return result;
 }
 
 int32_t cli_bcapi_atoi(struct cli_bc_ctx *ctx, const uint8_t* str, int32_t len)
 {
     int32_t number = 0;
     const uint8_t *end = str + len;
     while (isspace(*str) && str < end) str++;
     if (str == end)
 	return -1;/* all spaces */
     if (*str == '+') str++;
     if (str == end)
 	return -1;/* all spaces and +*/
     if (*str == '-')
 	return -1;/* only positive numbers */
     if (!isdigit(*str))
 	return -1;
     while (isdigit(*str) && str < end) {
 	number = number*10 + (*str - '0');
     }
     return number;
 }
 
 uint32_t cli_bcapi_debug_print_str_start(struct cli_bc_ctx *ctx , const uint8_t* s, uint32_t len)
 {
     if (!s || len <= 0)
 	return -1;

     cli_event_fastdata(EV, BCEV_DBG_STR, s, len);

     cli_dbgmsg("bytecode debug: %.*s", len, s);

     return 0;
 }
 
 uint32_t cli_bcapi_debug_print_str_nonl(struct cli_bc_ctx *ctx , const uint8_t* s, uint32_t len)
 {
     if (!s || len <= 0)
 	return -1;

     if (!cli_debug_flag)
 	return 0;

     return fwrite(s, 1, len, stderr);

 }
 
 uint32_t cli_bcapi_entropy_buffer(struct cli_bc_ctx *ctx , uint8_t* s, int32_t len)
 {
     uint32_t probTable[256];
     unsigned i;
     double entropy = 0;
     double log2 = log(2);
 
     if (!s || len <= 0)
 	return -1;
     memset(probTable, 0, sizeof(probTable));
     for (i=0;i<len;i++) {
 	probTable[s[i]]++;
     }
     for (i=0;i<256;i++) {
 	double p;
 	if (!probTable[i])
 	    continue;
 	p = (double)probTable[i] / len;
 	entropy += -p*log(p)/log2;
     }
     entropy *= 1<<26;
     return (uint32_t)entropy;
 }
 
 int32_t cli_bcapi_map_new(struct cli_bc_ctx *ctx, int32_t keysize, int32_t valuesize)
 {
     unsigned n = ctx->nmaps+1;

     struct cli_map *s;
     if (!keysize)
 	return -1;
     s = cli_realloc(ctx->maps, sizeof(*ctx->maps)*n);
     if (!s)

 	return -1;
     ctx->maps = s;
     ctx->nmaps = n;
     s = &s[n-1];
     cli_map_init(s, keysize, valuesize, 16);
     return n-1;
 }
 
 static struct cli_map *get_hashtab(struct cli_bc_ctx *ctx, int32_t id)
 {
     if (id < 0 || id >= ctx->nmaps || !ctx->maps)
 	return NULL;
     return &ctx->maps[id];
 }
 
 int32_t cli_bcapi_map_addkey(struct cli_bc_ctx *ctx , const uint8_t* key, int32_t keysize, int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     return cli_map_addkey(s, key, keysize);
 }
 
 int32_t cli_bcapi_map_setvalue(struct cli_bc_ctx *ctx, const uint8_t* value, int32_t valuesize, int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     return cli_map_setvalue(s, value, valuesize);
 }
 
 int32_t cli_bcapi_map_remove(struct cli_bc_ctx *ctx , const uint8_t* key, int32_t keysize, int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     return cli_map_removekey(s, key, keysize);
 }
 
 int32_t cli_bcapi_map_find(struct cli_bc_ctx *ctx , const uint8_t* key, int32_t keysize, int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     return cli_map_find(s, key, keysize);
 }
 
 int32_t cli_bcapi_map_getvaluesize(struct cli_bc_ctx *ctx, int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     return cli_map_getvalue_size(s);
 }
 
 uint8_t* cli_bcapi_map_getvalue(struct cli_bc_ctx *ctx , int32_t id, int32_t valuesize)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return NULL;
     if (cli_map_getvalue_size(s) != valuesize)
 	return NULL;
     return cli_map_getvalue(s);
 }
 
 int32_t cli_bcapi_map_done(struct cli_bc_ctx *ctx , int32_t id)
 {
     struct cli_map *s = get_hashtab(ctx, id);
     if (!s)
 	return -1;
     cli_map_delete(s);
     if (id == ctx->nmaps-1) {
 	ctx->nmaps--;

 	if (!ctx->nmaps) {
 	    free(ctx->maps);
 	    ctx->maps = NULL;
 	} else {
 	    s = cli_realloc(ctx->maps, ctx->nmaps*(sizeof(*s)));
 	    if (s)
 		ctx->maps = s;
 	}

     }
     return 0;
 }
 
 uint32_t cli_bcapi_engine_functionality_level(struct cli_bc_ctx *ctx)
 {
     return cl_retflevel();
 }
 
 uint32_t cli_bcapi_engine_dconf_level(struct cli_bc_ctx *ctx)
 {
     return CL_FLEVEL_DCONF;
 }
 
 uint32_t cli_bcapi_engine_scan_options(struct cli_bc_ctx *ctx)
 {
     cli_ctx *cctx = (cli_ctx*)ctx->ctx;
     return cctx->options;
 }
 
 uint32_t cli_bcapi_engine_db_options(struct cli_bc_ctx *ctx)
 {
     cli_ctx *cctx = (cli_ctx*)ctx->ctx;
     return cctx->engine->dboptions;
 }
 
 int32_t cli_bcapi_extract_set_container(struct cli_bc_ctx *ctx, uint32_t ftype)
 {
     if (ftype > CL_TYPE_IGNORED)
 	return -1;
     ctx->containertype = ftype;

     return 0;

 }
 
 int32_t cli_bcapi_input_switch(struct cli_bc_ctx *ctx , int32_t extracted_file)
 {
     fmap_t *map;
     if (ctx->extracted_file_input == extracted_file)
 	return 0;
     if (!extracted_file) {
 	cli_dbgmsg("bytecode api: input switched back to main file\n");
 	ctx->fmap = ctx->save_map;
 	ctx->extracted_file_input = 0;
 	return 0;
     }
     if (ctx->outfd < 0)
 	return -1;
     map = fmap(ctx->outfd, 0, 0);
     if (!map) {
 	cli_warnmsg("can't mmap() extracted temporary file %s\n", ctx->tempfile);
 	return -1;
     }
     ctx->save_map = ctx->fmap;
     cli_bytecode_context_setfile(ctx, map);
     ctx->extracted_file_input = 1;
     cli_dbgmsg("bytecode api: input switched to extracted file\n");
     return 0;
 }

 
 uint32_t cli_bcapi_get_environment(struct cli_bc_ctx *ctx , struct cli_environment* env, uint32_t len)
 {
     if (len > sizeof(*env)) {

 	cli_dbgmsg("cli_bcapi_get_environment len %u > %lu\n", len, sizeof(*env));

 	return -1;
     }
     memcpy(env, ctx->env, len);
     return 0;
 }
 
 uint32_t cli_bcapi_disable_bytecode_if(struct cli_bc_ctx *ctx , const int8_t* reason, uint32_t len, uint32_t cond)
 {
     if (ctx->bc->kind != BC_STARTUP) {
 	cli_dbgmsg("Bytecode must be BC_STARTUP to call disable_bytecode_if\n");
 	return -1;
     }
     if (!cond)
 	return ctx->bytecode_disable_status;
     if (*reason == '^')
 	cli_warnmsg("Bytecode: disabling completely because %s\n", reason+1);
     else
 	cli_dbgmsg("Bytecode: disabling completely because %s\n", reason);
     ctx->bytecode_disable_status = 2;
     return ctx->bytecode_disable_status;
 }
 
 uint32_t cli_bcapi_disable_jit_if(struct cli_bc_ctx *ctx , const int8_t* reason, uint32_t len, uint32_t cond)
 {
     if (ctx->bc->kind != BC_STARTUP) {
 	cli_dbgmsg("Bytecode must be BC_STARTUP to call disable_jit_if\n");
 	return -1;
     }
     if (!cond)
 	return ctx->bytecode_disable_status;
     if (*reason == '^')
 	cli_warnmsg("Bytecode: disabling JIT because %s\n", reason+1);
     else
 	cli_dbgmsg("Bytecode: disabling JIT because %s\n", reason);
     if (ctx->bytecode_disable_status != 2) /* no reenabling */
 	ctx->bytecode_disable_status = 1;
     return ctx->bytecode_disable_status;
 }
 
 int32_t cli_bcapi_version_compare(struct cli_bc_ctx *ctx , const uint8_t* lhs, uint32_t lhs_len, 
 				  const uint8_t* rhs, uint32_t rhs_len)
 {
     unsigned i = 0, j = 0;

     unsigned long li=0, ri=0;

     do {
 	while (i < lhs_len && j < rhs_len && lhs[i] == rhs[j] &&
 	       !isdigit(lhs[i]) && !isdigit(rhs[j])) {
 	    i++; j++;
 	}
 	if (i == lhs_len && j == rhs_len)
 	    return 0;
 	if (i == lhs_len)
 	    return -1;
 	if (j == rhs_len)
 	    return 1;
 	if (!isdigit(lhs[i]) || !isdigit(rhs[j]))
 	    return lhs[i] < rhs[j] ? -1 : 1;
 	while (isdigit(lhs[i]) && i < lhs_len)

 	    li = 10*li + (lhs[i++] - '0');

 	while (isdigit(rhs[j]) && j < rhs_len)

 	    ri = 10*ri + (rhs[j++] - '0');

 	if (li < ri)
 	    return -1;
 	if (li > ri)
 	    return 1;
     } while (1);
 }
 
 static int check_bits(uint32_t query, uint32_t value, uint8_t shift, uint8_t mask)
 {
     uint8_t q = (query >> shift)&mask;
     uint8_t v = (value >> shift)&mask;
     /* q == mask -> ANY */
     if (q == v || q == mask)
 	return 1;
     return 0;
 }
 
 uint32_t cli_bcapi_check_platform(struct cli_bc_ctx *ctx , uint32_t a, uint32_t b , uint32_t c)
 {
     unsigned ret =
 	check_bits(a, ctx->env->platform_id_a, 24, 0xff) &&
 	check_bits(a, ctx->env->platform_id_a, 20, 0xf) &&
 	check_bits(a, ctx->env->platform_id_a, 16, 0xf) &&
 	check_bits(a, ctx->env->platform_id_a, 8, 0xff) &&
 	check_bits(a, ctx->env->platform_id_a, 0, 0xff) &&
 	check_bits(b, ctx->env->platform_id_b, 28, 0xf) &&
 	check_bits(b, ctx->env->platform_id_b, 24, 0xf) &&
 	check_bits(b, ctx->env->platform_id_b, 16, 0xff) &&
 	check_bits(b, ctx->env->platform_id_b, 8, 0xff) &&
 	check_bits(b, ctx->env->platform_id_b, 0, 0xff) &&
 	check_bits(c, ctx->env->platform_id_c, 24, 0xff) &&
 	check_bits(c, ctx->env->platform_id_c, 16, 0xff) &&
 	check_bits(c, ctx->env->platform_id_c, 8, 0xff) &&
 	check_bits(c, ctx->env->platform_id_c, 0, 0xff);
     if (ret) {
 	cli_dbgmsg("check_platform(0x%08x,0x%08x,0x%08x) = match\n",a,b,c);
     }
     return ret;
 }
 

 int cli_bytecode_context_setpdf(struct cli_bc_ctx *ctx, unsigned phase,
 				unsigned nobjs,
 				struct pdf_obj *objs, uint32_t *pdf_flags,
 				uint32_t pdfsize, uint32_t pdfstartoff)
 {
     ctx->pdf_nobjs = nobjs;
     ctx->pdf_objs = objs;
     ctx->pdf_flags = pdf_flags;
     ctx->pdf_size = pdfsize;
     ctx->pdf_startoff = pdfstartoff;
     ctx->pdf_phase = phase;
     return 0;
 }
 
 int32_t cli_bcapi_pdf_get_obj_num(struct cli_bc_ctx *ctx)
 {
     if (!ctx->pdf_phase)
 	return -1;
     return ctx->pdf_nobjs;
 }
 
 int32_t cli_bcapi_pdf_get_flags(struct cli_bc_ctx *ctx)
 {
     if (!ctx->pdf_phase)
 	return -1;
     return *ctx->pdf_flags;
 }
 
 int32_t cli_bcapi_pdf_set_flags(struct cli_bc_ctx *ctx , int32_t flags)
 {
     if (!ctx->pdf_phase)
 	return -1;
     cli_dbgmsg("cli_pdf: bytecode set_flags %08x -> %08x\n",
 	       *ctx->pdf_flags,
 	       flags);
     *ctx->pdf_flags = flags;
     return 0;
 }
 
 int32_t cli_bcapi_pdf_lookupobj(struct cli_bc_ctx *ctx , uint32_t objid)
 {
     unsigned i;
     if (!ctx->pdf_phase)
 	return -1;
     for (i=0;i<ctx->pdf_nobjs;i++) {
 	if (ctx->pdf_objs[i].id == objid)
 	    return i;
     }
     return -1;
 }
 
 uint32_t cli_bcapi_pdf_getobjsize(struct cli_bc_ctx *ctx , int32_t objidx)
 {
     if (!ctx->pdf_phase ||
 	objidx >= ctx->pdf_nobjs ||
 	ctx->pdf_phase == PDF_PHASE_POSTDUMP /* map is obj itself, no access to pdf anymore */
        )
 	return 0;
     if (objidx + 1 == ctx->pdf_nobjs)
 	return ctx->pdf_size - ctx->pdf_objs[objidx].start;
     return ctx->pdf_objs[objidx+1].start - ctx->pdf_objs[objidx].start - 4;
 }
 
 uint8_t* cli_bcapi_pdf_getobj(struct cli_bc_ctx *ctx , int32_t objidx, uint32_t amount)
 {
     uint32_t size = cli_bcapi_pdf_getobjsize(ctx, objidx);
     if (amount > size)
 	return NULL;
     return fmap_need_off(ctx->fmap, ctx->pdf_objs[objidx].start, amount);
 }
 
 int32_t cli_bcapi_pdf_getobjid(struct cli_bc_ctx *ctx , int32_t objidx)
 {
     if (!ctx->pdf_phase ||
 	objidx >= ctx->pdf_nobjs)
 	return -1;
     return ctx->pdf_objs[objidx].id;
 }
 
 int32_t cli_bcapi_pdf_getobjflags(struct cli_bc_ctx *ctx , int32_t objidx)
 {
     if (!ctx->pdf_phase ||
 	objidx >= ctx->pdf_nobjs)
 	return -1;
     return ctx->pdf_objs[objidx].flags;
 }
 
 int32_t cli_bcapi_pdf_setobjflags(struct cli_bc_ctx *ctx , int32_t objidx, int32_t flags)
 {
     if (!ctx->pdf_phase ||
 	objidx >= ctx->pdf_nobjs)
 	return -1;
     cli_dbgmsg("cli_pdf: bytecode setobjflags %08x -> %08x\n",
 	       ctx->pdf_objs[objidx].flags,
 	       flags);
     ctx->pdf_objs[objidx].flags = flags;
     return 0;
 }
 
 int32_t cli_bcapi_pdf_get_offset(struct cli_bc_ctx *ctx , int32_t objidx)
 {
     if (!ctx->pdf_phase ||
 	objidx >= ctx->pdf_nobjs)
 	return -1;
     return ctx->pdf_startoff + ctx->pdf_objs[objidx].start;
 }
 
 int32_t cli_bcapi_pdf_get_phase(struct cli_bc_ctx *ctx)
 {
     return ctx->pdf_phase;
 }
 
 int32_t cli_bcapi_pdf_get_dumpedobjid(struct cli_bc_ctx *ctx)
 {
     if (ctx->pdf_phase != PDF_PHASE_POSTDUMP)
 	return -1;
     return ctx->pdf_dumpedid;
 }

 int32_t cli_bcapi_running_on_jit(struct cli_bc_ctx *ctx )
 {
     ctx->no_diff = 1;
     return ctx->on_jit;
 }

 
 int32_t cli_bcapi_get_file_reliability(struct cli_bc_ctx *ctx )
 {
     cli_ctx *cctx = (cli_ctx*)ctx->ctx;
     return cctx ? cctx->corrupted_input : 3;
 }