diff options
Diffstat (limited to 'source/blender/makesdna/intern/dna_genfile.c')
| -rw-r--r-- | source/blender/makesdna/intern/dna_genfile.c | 1086 |
1 files changed, 1086 insertions, 0 deletions
diff --git a/source/blender/makesdna/intern/dna_genfile.c b/source/blender/makesdna/intern/dna_genfile.c new file mode 100644 index 00000000000..0ffc170a5aa --- /dev/null +++ b/source/blender/makesdna/intern/dna_genfile.c @@ -0,0 +1,1086 @@ +/* dna_genfile.c + * + * Functions for struct-dna, the genetic file dot c! + * + * $Id$ + * + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + * DNA handling + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "MEM_guardedalloc.h" // for MEM_freeN MEM_mallocN MEM_callocN + +#include "DNA_genfile.h" +#include "DNA_sdna_types.h" // for SDNA ;-) + + +/* gcc 4.1 on mingw was complaining that __int64 was alredy defined +actually is saw the line below as typedef long long long long... +Anyhow, since its alredy defined, its safe to do an ifndef here- Cambpell*/ +#ifdef FREE_WINDOWS +#ifndef __int64 +typedef long long __int64; +#endif +#endif + +/* + * - please note: no builtin security to detect input of double structs + * - if you want a struct not to be in DNA file: add two hash marks above it (#<enter>#<enter>) + +Structure DNA data is added to each blender file and to each executable, this to detect +in .blend files new veriables in structs, changed array sizes, etc. It's also used for +converting endian and pointer size (32-64 bits) +As an extra, Python uses a call to detect run-time the contents of a blender struct. + +Create a structDNA: only needed when one of the input include (.h) files change. +File Syntax: + SDNA (4 bytes) (magic number) + NAME (4 bytes) + <nr> (4 bytes) amount of names (int) + <string> + <string> + ... + ... + TYPE (4 bytes) + <nr> amount of types (int) + <string> + <string> + ... + ... + TLEN (4 bytes) + <len> (short) the lengths of types + <len> + ... + ... + STRC (4 bytes) + <nr> amount of structs (int) + <typenr><nr_of_elems> <typenr><namenr> <typenr><namenr> ... + +!!Remember to read/write integer and short aligned!! + + While writing a file, the names of a struct is indicated with a type number, + to be found with: type= findstruct_nr(SDNA *, char *) + The value of 'type' corresponds with the the index within the structs array + + For the moment: the complete DNA file is included in a .blend file. For + the future we can think of smarter methods, like only included the used + structs. Only needed to keep a file short though... + +ALLOWED AND TESTED CHANGES IN STRUCTS: + - type change (a char to float will be divided by 255) + - location within a struct (everthing can be randomly mixed up) + - struct within struct (within struct etc), this is recursive + - adding new elements, will be default initialized zero + - remving elements + - change of array sizes + - change of a pointer type: when the name doesn't change the contents is copied + +NOT YET: + - array (vec[3]) to float struct (vec3f) + +DONE: + - endian compatibility + - pointer conversion (32-64 bits) + +IMPORTANT: + - do not use #defines in structs for array lenghts, this cannot be read by the dna functions + - do not use uint, but unsigned int instead, ushort and ulong are allowed + - only use a long in Blender if you want this to be the size of a pointer. so it is + 32 bits or 64 bits, dependant at the cpu architecture + - chars are always unsigned + - aligment of variables has to be done in such a way, that any system does + not create 'padding' (gaps) in structures. So make sure that: + - short: 2 aligned + - int: 4 aligned + - float: 4 aligned + - double: 8 aligned + - long: 8 aligned + - struct: 8 aligned + - the sdna functions have several error prints builtin, always check blender running from a console. + +*/ + +/* local */ +static int le_int(int temp); +static short le_short(short temp); + +/* ************************* ENDIAN STUFF ********************** */ + +static short le_short(short temp) +{ + short new; + char *rt=(char *)&temp, *rtn=(char *)&new; + + rtn[0]= rt[1]; + rtn[1]= rt[0]; + + return new; +} + + +static int le_int(int temp) +{ + int new; + char *rt=(char *)&temp, *rtn=(char *)&new; + + rtn[0]= rt[3]; + rtn[1]= rt[2]; + rtn[2]= rt[1]; + rtn[3]= rt[0]; + + return new; +} + + +/* ************************* MAKE DNA ********************** */ + +/* allowed duplicate code from makesdna.c */ +int DNA_elem_array_size(const char *astr, int len) +{ + int a, mul=1; + char str[100], *cp=0; + + memcpy(str, astr, len+1); + + for(a=0; a<len; a++) { + if( str[a]== '[' ) { + cp= &(str[a+1]); + } + else if( str[a]==']' && cp) { + str[a]= 0; + mul*= atoi(cp); + } + } + + return mul; +} + +/* ************************* END MAKE DNA ********************** */ + +/* ************************* DIV ********************** */ + +void DNA_sdna_free(SDNA *sdna) +{ + MEM_freeN(sdna->data); + MEM_freeN(sdna->names); + MEM_freeN(sdna->types); + MEM_freeN(sdna->structs); + + MEM_freeN(sdna); +} + +static int ispointer(char *name) +{ + /* check if pointer or function pointer */ + return (name[0]=='*' || (name[0]=='(' && name[1]=='*')); +} + +static int elementsize(SDNA *sdna, short type, short name) +/* call with numbers from struct-array */ +{ + int mul, namelen, len; + char *cp; + + cp= sdna->names[name]; + len= 0; + + namelen= strlen(cp); + /* is it a pointer or function pointer? */ + if(ispointer(cp)) { + /* has the naam an extra length? (array) */ + mul= 1; + if( cp[namelen-1]==']') mul= DNA_elem_array_size(cp, namelen); + + len= sdna->pointerlen*mul; + } + else if( sdna->typelens[type] ) { + /* has the naam an extra length? (array) */ + mul= 1; + if( cp[namelen-1]==']') mul= DNA_elem_array_size(cp, namelen); + + len= mul*sdna->typelens[type]; + + } + + return len; +} + +#if 0 +static void printstruct(SDNA *sdna, short strnr) +{ + /* is for debug */ + int b, nr; + short *sp; + + sp= sdna->structs[strnr]; + + printf("struct %s\n", sdna->types[ sp[0] ]); + nr= sp[1]; + sp+= 2; + + for(b=0; b< nr; b++, sp+= 2) { + printf(" %s %s\n", sdna->types[sp[0]], sdna->names[sp[1]]); + } +} +#endif + +static short *findstruct_name(SDNA *sdna, char *str) +{ + int a; + short *sp=0; + + + for(a=0; a<sdna->nr_structs; a++) { + + sp= sdna->structs[a]; + + if(strcmp( sdna->types[ sp[0] ], str )==0) return sp; + } + + return 0; +} + +int DNA_struct_find_nr(SDNA *sdna, const char *str) +{ + short *sp=0; + int a; + + if(sdna->lastfind<sdna->nr_structs) { + sp= sdna->structs[sdna->lastfind]; + if(strcmp( sdna->types[ sp[0] ], str )==0) return sdna->lastfind; + } + + for(a=0; a<sdna->nr_structs; a++) { + + sp= sdna->structs[a]; + + if(strcmp( sdna->types[ sp[0] ], str )==0) { + sdna->lastfind= a; + return a; + } + } + + return -1; +} + +/* ************************* END DIV ********************** */ + +/* ************************* READ DNA ********************** */ + +static void init_structDNA(SDNA *sdna, int do_endian_swap) +/* in sdna->data the data, now we convert that to something understandable */ +{ + int *data, *verg; + long nr; /* intptr_t 2.48 XXX */ + short *sp; + char str[8], *cp; + + verg= (int *)str; + data= (int *)sdna->data; + + strcpy(str, "SDNA"); + if( *data == *verg ) { + + data++; + + /* load names array */ + strcpy(str, "NAME"); + if( *data == *verg ) { + data++; + + if(do_endian_swap) sdna->nr_names= le_int(*data); + else sdna->nr_names= *data; + + data++; + sdna->names= MEM_callocN( sizeof(void *)*sdna->nr_names, "sdnanames"); + } + else { + printf("NAME error in SDNA file\n"); + return; + } + + nr= 0; + cp= (char *)data; + while(nr<sdna->nr_names) { + sdna->names[nr]= cp; + while( *cp) cp++; + cp++; + nr++; + } + nr= (long)cp; /* prevent BUS error */ /* intptr_t 2.48 XXX */ + nr= (nr+3) & ~3; + cp= (char *)nr; + + /* load type names array */ + data= (int *)cp; + strcpy(str, "TYPE"); + if( *data == *verg ) { + data++; + + if(do_endian_swap) sdna->nr_types= le_int(*data); + else sdna->nr_types= *data; + + data++; + sdna->types= MEM_callocN( sizeof(void *)*sdna->nr_types, "sdnatypes"); + } + else { + printf("TYPE error in SDNA file\n"); + return; + } + + nr= 0; + cp= (char *)data; + while(nr<sdna->nr_types) { + sdna->types[nr]= cp; + + /* this is a patch, to change struct names without a confict with SDNA */ + /* be careful to use it, in this case for a system-struct (opengl/X) */ + + if( *cp == 'b') { + /* struct Screen was already used by X, 'bScreen' replaces the old IrisGL 'Screen' struct */ + if( strcmp("bScreen", cp)==0 ) sdna->types[nr]= cp+1; + } + + while( *cp) cp++; + cp++; + nr++; + } + nr= (long)cp; /* prevent BUS error */ /* intptr_t 2.48 XXX */ + nr= (nr+3) & ~3; + cp= (char *)nr; + + /* load typelen array */ + data= (int *)cp; + strcpy(str, "TLEN"); + if( *data == *verg ) { + data++; + sp= (short *)data; + sdna->typelens= sp; + + if(do_endian_swap) { + short a, *spo= sp; + + a= sdna->nr_types; + while(a--) { + spo[0]= le_short(spo[0]); + spo++; + } + } + + sp+= sdna->nr_types; + } + else { + printf("TLEN error in SDNA file\n"); + return; + } + if(sdna->nr_types & 1) sp++; /* prevent BUS error */ + + /* load struct array */ + data= (int *)sp; + strcpy(str, "STRC"); + if( *data == *verg ) { + data++; + + if(do_endian_swap) sdna->nr_structs= le_int(*data); + else sdna->nr_structs= *data; + + data++; + sdna->structs= MEM_callocN( sizeof(void *)*sdna->nr_structs, "sdnastrcs"); + } + else { + printf("STRC error in SDNA file\n"); + return; + } + + nr= 0; + sp= (short *)data; + while(nr<sdna->nr_structs) { + sdna->structs[nr]= sp; + + if(do_endian_swap) { + short a; + + sp[0]= le_short(sp[0]); + sp[1]= le_short(sp[1]); + + a= sp[1]; + sp+= 2; + while(a--) { + sp[0]= le_short(sp[0]); + sp[1]= le_short(sp[1]); + sp+= 2; + } + } + else { + sp+= 2*sp[1]+2; + } + + nr++; + } + + /* finally pointerlen: use struct ListBase to test it, never change the size of it! */ + sp= findstruct_name(sdna, "ListBase"); + /* weird; i have no memory of that... I think I used sizeof(void *) before... (ton) */ + + sdna->pointerlen= sdna->typelens[ sp[0] ]/2; + + if(sp[1]!=2 || (sdna->pointerlen!=4 && sdna->pointerlen!=8)) { + printf("ListBase struct error! Needs it to calculate pointerize.\n"); + exit(0); + /* well, at least sizeof(ListBase) is error proof! (ton) */ + } + + } +} + +SDNA *DNA_sdna_from_data(void *data, int datalen, int do_endian_swap) +{ + SDNA *sdna= MEM_mallocN(sizeof(*sdna), "sdna"); + + sdna->lastfind= 0; + + sdna->datalen= datalen; + sdna->data= MEM_mallocN(datalen, "sdna_data"); + memcpy(sdna->data, data, datalen); + + init_structDNA(sdna, do_endian_swap); + + return sdna; +} + +/* ******************** END READ DNA ********************** */ + +/* ******************* HANDLE DNA ***************** */ + +static void recurs_test_compflags(SDNA *sdna, char *compflags, int structnr) +{ + int a, b, typenr, elems; + short *sp; + char *cp; + + /* check all structs, test if it's inside another struct */ + sp= sdna->structs[structnr]; + typenr= sp[0]; + + for(a=0; a<sdna->nr_structs; a++) { + if(a!=structnr && compflags[a]==1) { + sp= sdna->structs[a]; + elems= sp[1]; + sp+= 2; + for(b=0; b<elems; b++, sp+=2) { + if(sp[0]==typenr) { + cp= sdna->names[ sp[1] ]; + if(!ispointer(cp)) { + compflags[a]= 2; + recurs_test_compflags(sdna, compflags, a); + } + } + } + } + } + +} + + /* Unsure of exact function - compares the sdna argument to + * newsdna and sets up the information necessary to convert + * data written with a dna of oldsdna to inmemory data with a + * structure defined by the newsdna sdna (I think). -zr + */ + +/* well, the function below is just a lookup table to speed + * up reading files. doh! -ton + */ + + +char *DNA_struct_get_compareflags(SDNA *sdna, SDNA *newsdna) +{ + /* flag: 0: doesn't exist anymore (or not yet) + * 1: is equal + * 2: is different + */ + int a, b; + short *spold, *spcur; + char *str1, *str2; + char *compflags; + + if(sdna->nr_structs==0) { + printf("error: file without SDNA\n"); + return NULL; + } + + compflags= MEM_callocN(sdna->nr_structs, "compflags"); + + /* we check all structs in 'sdna' and compare them with + * the structs in 'newsdna' + */ + + for(a=0; a<sdna->nr_structs; a++) { + spold= sdna->structs[a]; + + /* search for type in cur */ + spcur= findstruct_name(newsdna, sdna->types[spold[0]]); + + if(spcur) { + compflags[a]= 2; + + /* compare length and amount of elems */ + if( spcur[1] == spold[1]) { + if( newsdna->typelens[spcur[0]] == sdna->typelens[spold[0]] ) { + + /* same length, same amount of elems, now per type and name */ + b= spold[1]; + spold+= 2; + spcur+= 2; + while(b > 0) { + str1= newsdna->types[spcur[0]]; + str2= sdna->types[spold[0]]; + if(strcmp(str1, str2)!=0) break; + + str1= newsdna->names[spcur[1]]; + str2= sdna->names[spold[1]]; + if(strcmp(str1, str2)!=0) break; + + /* same type and same name, now pointersize */ + if(ispointer(str1)) { + if(sdna->pointerlen!=newsdna->pointerlen) break; + } + + b--; + spold+= 2; + spcur+= 2; + } + if(b==0) compflags[a]= 1; + + } + } + + } + } + + /* first struct in util.h is struct Link, this is skipped in compflags (als # 0). + * was a bug, and this way dirty patched! Solve this later.... + */ + compflags[0]= 1; + + /* Because structs can be inside structs, we recursively + * set flags when a struct is altered + */ + for(a=0; a<sdna->nr_structs; a++) { + if(compflags[a]==2) recurs_test_compflags(sdna, compflags, a); + } + +/* + for(a=0; a<sdna->nr_structs; a++) { + if(compflags[a]==2) { + spold= sdna->structs[a]; + printf("changed: %s\n", sdna->types[ spold[0] ]); + } + } +*/ + + return compflags; +} + +static void cast_elem(char *ctype, char *otype, char *name, char *curdata, char *olddata) +{ + double val = 0.0; + int arrlen, curlen=1, oldlen=1, ctypenr, otypenr; + + arrlen= DNA_elem_array_size(name, strlen(name)); + + /* define otypenr */ + if(strcmp(otype, "char")==0) otypenr= 0; + else if((strcmp(otype, "uchar")==0)||(strcmp(otype, "unsigned char")==0)) otypenr= 1; + else if(strcmp(otype, "short")==0) otypenr= 2; + else if((strcmp(otype, "ushort")==0)||(strcmp(otype, "unsigned short")==0)) otypenr= 3; + else if(strcmp(otype, "int")==0) otypenr= 4; + else if(strcmp(otype, "long")==0) otypenr= 5; + else if((strcmp(otype, "ulong")==0)||(strcmp(otype, "unsigned long")==0)) otypenr= 6; + else if(strcmp(otype, "float")==0) otypenr= 7; + else if(strcmp(otype, "double")==0) otypenr= 8; + else return; + + /* define ctypenr */ + if(strcmp(ctype, "char")==0) ctypenr= 0; + else if((strcmp(ctype, "uchar")==0)||(strcmp(ctype, "unsigned char")==0)) ctypenr= 1; + else if(strcmp(ctype, "short")==0) ctypenr= 2; + else if((strcmp(ctype, "ushort")==0)||(strcmp(ctype, "unsigned short")==0)) ctypenr= 3; + else if(strcmp(ctype, "int")==0) ctypenr= 4; + else if(strcmp(ctype, "long")==0) ctypenr= 5; + else if((strcmp(ctype, "ulong")==0)||(strcmp(ctype, "unsigned long")==0)) ctypenr= 6; + else if(strcmp(ctype, "float")==0) ctypenr= 7; + else if(strcmp(ctype, "double")==0) ctypenr= 8; + else return; + + /* define lengths */ + if(otypenr < 2) oldlen= 1; + else if(otypenr < 4) oldlen= 2; + else if(otypenr < 8) oldlen= 4; + else oldlen= 8; + + if(ctypenr < 2) curlen= 1; + else if(ctypenr < 4) curlen= 2; + else if(ctypenr < 8) curlen= 4; + else curlen= 8; + + while(arrlen>0) { + switch(otypenr) { + case 0: + val= *olddata; break; + case 1: + val= *( (unsigned char *)olddata); break; + case 2: + val= *( (short *)olddata); break; + case 3: + val= *( (unsigned short *)olddata); break; + case 4: + val= *( (int *)olddata); break; + case 5: + val= *( (int *)olddata); break; + case 6: + val= *( (unsigned int *)olddata); break; + case 7: + val= *( (float *)olddata); break; + case 8: + val= *( (double *)olddata); break; + } + + switch(ctypenr) { + case 0: + *curdata= val; break; + case 1: + *( (unsigned char *)curdata)= val; break; + case 2: + *( (short *)curdata)= val; break; + case 3: + *( (unsigned short *)curdata)= val; break; + case 4: + *( (int *)curdata)= val; break; + case 5: + *( (int *)curdata)= val; break; + case 6: + *( (unsigned int *)curdata)= val; break; + case 7: + if(otypenr<2) val/= 255; + *( (float *)curdata)= val; break; + case 8: + if(otypenr<2) val/= 255; + *( (double *)curdata)= val; break; + } + + olddata+= oldlen; + curdata+= curlen; + arrlen--; + } +} + +static void cast_pointer(int curlen, int oldlen, char *name, char *curdata, char *olddata) +{ +#ifdef WIN32 + __int64 lval; +#else + long long lval; +#endif + int arrlen; + + arrlen= DNA_elem_array_size(name, strlen(name)); + + while(arrlen>0) { + + if(curlen==oldlen) { + memcpy(curdata, olddata, curlen); + } + else if(curlen==4 && oldlen==8) { +#ifdef WIN32 + lval= *( (__int64 *)olddata ); +#else + lval= *( (long long *)olddata ); +#endif + *((int *)curdata) = lval>>3; /* is of course gambling! */ + } + else if(curlen==8 && oldlen==4) { +#ifdef WIN32 + *( (__int64 *)curdata ) = *((int *)olddata); +#else + *( (long long *)curdata ) = *((int *)olddata); +#endif + } + else { + /* for debug */ + printf("errpr: illegal pointersize! \n"); + } + + olddata+= oldlen; + curdata+= curlen; + arrlen--; + + } +} + +static int elem_strcmp(char *name, char *oname) +{ + int a=0; + + /* strcmp without array part */ + + while(1) { + if(name[a] != oname[a]) return 1; + if(name[a]=='[') break; + if(name[a]==0) break; + a++; + } + if(name[a] != oname[a]) return 1; + return 0; +} + +static char *find_elem(SDNA *sdna, char *type, char *name, short *old, char *olddata, short **sppo) +{ + int a, elemcount, len; + char *otype, *oname; + + /* without arraypart, so names can differ: return old namenr and type */ + + /* in old is the old struct */ + elemcount= old[1]; + old+= 2; + for(a=0; a<elemcount; a++, old+=2) { + + otype= sdna->types[old[0]]; + oname= sdna->names[old[1]]; + + len= elementsize(sdna, old[0], old[1]); + + if( elem_strcmp(name, oname)==0 ) { /* naam equal */ + if( strcmp(type, otype)==0 ) { /* type equal */ + if(sppo) *sppo= old; + return olddata; + } + + return 0; + } + + olddata+= len; + } + return 0; +} + +static void reconstruct_elem(SDNA *newsdna, SDNA *oldsdna, char *type, char *name, char *curdata, short *old, char *olddata) +{ + /* rules: test for NAME: + - name equal: + - cast type + - name partially equal (array differs) + - type equal: memcpy + - types casten + (nzc 2-4-2001 I want the 'unsigned' bit to be parsed as well. Where + can I force this?) + */ + int a, elemcount, len, array, oldsize, cursize, mul; + char *otype, *oname, *cp; + + /* is 'name' an array? */ + cp= name; + array= 0; + while( *cp && *cp!='[') { + cp++; array++; + } + if( *cp!= '[' ) array= 0; + + /* in old is the old struct */ + elemcount= old[1]; + old+= 2; + for(a=0; a<elemcount; a++, old+=2) { + otype= oldsdna->types[old[0]]; + oname= oldsdna->names[old[1]]; + len= elementsize(oldsdna, old[0], old[1]); + + if( strcmp(name, oname)==0 ) { /* name equal */ + + if(ispointer(name)) { /* pointer of functionpointer afhandelen */ + cast_pointer(newsdna->pointerlen, oldsdna->pointerlen, name, curdata, olddata); + } + else if( strcmp(type, otype)==0 ) { /* type equal */ + memcpy(curdata, olddata, len); + } + else cast_elem(type, otype, name, curdata, olddata); + + return; + } + else if(array) { /* name is an array */ + + if(oname[array]=='[' && strncmp(name, oname, array)==0 ) { /* basis equal */ + + cursize= DNA_elem_array_size(name, strlen(name)); + oldsize= DNA_elem_array_size(oname, strlen(oname)); + + if(ispointer(name)) { /* handle pointer or functionpointer */ + if(cursize>oldsize) cast_pointer(newsdna->pointerlen, oldsdna->pointerlen, oname, curdata, olddata); + else cast_pointer(newsdna->pointerlen, oldsdna->pointerlen, name, curdata, olddata); + } + else if(name[0]=='*' || strcmp(type, otype)==0 ) { /* type equal */ + mul= len/oldsize; + mul*= (cursize < oldsize)? cursize: oldsize; + memcpy(curdata, olddata, mul); + } + else { + if(cursize>oldsize) cast_elem(type, otype, oname, curdata, olddata); + else cast_elem(type, otype, name, curdata, olddata); + } + return; + } + } + olddata+= len; + } +} + +static void reconstruct_struct(SDNA *newsdna, SDNA *oldsdna, char *compflags, int oldSDNAnr, char *data, int curSDNAnr, char *cur) +{ + /* Recursive! + * Per element from cur_struct, read data from old_struct. + * If element is a struct, call recursive. + */ + int a, elemcount, elen, eleno, mul, mulo, firststructtypenr; + short *spo, *spc, *sppo; + char *name, *nameo, *type, *cpo, *cpc; + + if(oldSDNAnr== -1) return; + if(curSDNAnr== -1) return; + + if( compflags[oldSDNAnr]==1 ) { /* if recursive: test for equal */ + + spo= oldsdna->structs[oldSDNAnr]; + elen= oldsdna->typelens[ spo[0] ]; + memcpy( cur, data, elen); + + return; + } + + firststructtypenr= *(newsdna->structs[0]); + + spo= oldsdna->structs[oldSDNAnr]; + spc= newsdna->structs[curSDNAnr]; + + elemcount= spc[1]; + + spc+= 2; + cpc= cur; + for(a=0; a<elemcount; a++, spc+=2) { + type= newsdna->types[spc[0]]; + name= newsdna->names[spc[1]]; + + elen= elementsize(newsdna, spc[0], spc[1]); + + /* test: is type a struct? */ + if(spc[0]>=firststructtypenr && !ispointer(name)) { + + /* where does the old struct data start (and is there an old one?) */ + cpo= find_elem(oldsdna, type, name, spo, data, &sppo); + + if(cpo) { + oldSDNAnr= DNA_struct_find_nr(oldsdna, type); + curSDNAnr= DNA_struct_find_nr(newsdna, type); + + /* array! */ + mul= DNA_elem_array_size(name, strlen(name)); + nameo= oldsdna->names[sppo[1]]; + mulo= DNA_elem_array_size(nameo, strlen(nameo)); + + eleno= elementsize(oldsdna, sppo[0], sppo[1]); + + elen/= mul; + eleno/= mulo; + + while(mul--) { + reconstruct_struct(newsdna, oldsdna, compflags, oldSDNAnr, cpo, curSDNAnr, cpc); + cpo+= eleno; + cpc+= elen; + + /* new struct array larger than old */ + mulo--; + if(mulo<=0) break; + } + } + else cpc+= elen; + } + else { + + reconstruct_elem(newsdna, oldsdna, type, name, cpc, spo, data); + cpc+= elen; + + } + } +} + +void DNA_struct_switch_endian(SDNA *oldsdna, int oldSDNAnr, char *data) +{ + /* Recursive! + * If element is a struct, call recursive. + */ + int a, mul, elemcount, elen, elena, firststructtypenr; + short *spo, *spc, skip; + char *name, *type, *cpo, *cur, cval; + + if(oldSDNAnr== -1) return; + firststructtypenr= *(oldsdna->structs[0]); + + spo= spc= oldsdna->structs[oldSDNAnr]; + + elemcount= spo[1]; + + spc+= 2; + cur= data; + + for(a=0; a<elemcount; a++, spc+=2) { + type= oldsdna->types[spc[0]]; + name= oldsdna->names[spc[1]]; + + /* elementsize = including arraysize */ + elen= elementsize(oldsdna, spc[0], spc[1]); + + /* test: is type a struct? */ + if(spc[0]>=firststructtypenr && !ispointer(name)) { + /* where does the old data start (is there one?) */ + cpo= find_elem(oldsdna, type, name, spo, data, 0); + if(cpo) { + oldSDNAnr= DNA_struct_find_nr(oldsdna, type); + + mul= DNA_elem_array_size(name, strlen(name)); + elena= elen/mul; + + while(mul--) { + DNA_struct_switch_endian(oldsdna, oldSDNAnr, cpo); + cpo += elena; + } + } + } + else { + + if(ispointer(name)) { + if(oldsdna->pointerlen==8) { + + mul= DNA_elem_array_size(name, strlen(name)); + cpo= cur; + while(mul--) { + cval= cpo[0]; cpo[0]= cpo[7]; cpo[7]= cval; + cval= cpo[1]; cpo[1]= cpo[6]; cpo[6]= cval; + cval= cpo[2]; cpo[2]= cpo[5]; cpo[5]= cval; + cval= cpo[3]; cpo[3]= cpo[4]; cpo[4]= cval; + + cpo+= 8; + } + + } + } + else { + + if( spc[0]==2 || spc[0]==3 ) { /* short-ushort */ + + /* exception: variable called blocktype/ipowin: derived from ID_ */ + skip= 0; + if(name[0]=='b' && name[1]=='l') { + if(strcmp(name, "blocktype")==0) skip= 1; + } + else if(name[0]=='i' && name[1]=='p') { + if(strcmp(name, "ipowin")==0) skip= 1; + } + + if(skip==0) { + mul= DNA_elem_array_size(name, strlen(name)); + cpo= cur; + while(mul--) { + cval= cpo[0]; + cpo[0]= cpo[1]; + cpo[1]= cval; + cpo+= 2; + } + } + } + else if(spc[0]>3 && spc[0]<8) { /* int-long-ulong-float */ + + mul= DNA_elem_array_size(name, strlen(name)); + cpo= cur; + while(mul--) { + cval= cpo[0]; + cpo[0]= cpo[3]; + cpo[3]= cval; + cval= cpo[1]; + cpo[1]= cpo[2]; + cpo[2]= cval; + cpo+= 4; + } + } + } + } + cur+= elen; + } +} + +void *DNA_struct_reconstruct(SDNA *newsdna, SDNA *oldsdna, char *compflags, int oldSDNAnr, int blocks, void *data) +{ + int a, curSDNAnr, curlen=0, oldlen; + short *spo, *spc; + char *cur, *type, *cpc, *cpo; + + /* oldSDNAnr == structnr, we're looking for the corresponding 'cur' number */ + spo= oldsdna->structs[oldSDNAnr]; + type= oldsdna->types[ spo[0] ]; + oldlen= oldsdna->typelens[ spo[0] ]; + curSDNAnr= DNA_struct_find_nr(newsdna, type); + + /* init data and alloc */ + if(curSDNAnr >= 0) { + spc= newsdna->structs[curSDNAnr]; + curlen= newsdna->typelens[ spc[0] ]; + } + if(curlen==0) { + return NULL; + } + + cur= MEM_callocN( blocks*curlen, "reconstruct"); + cpc= cur; + cpo= data; + for(a=0; a<blocks; a++) { + reconstruct_struct(newsdna, oldsdna, compflags, oldSDNAnr, cpo, curSDNAnr, cpc); + cpc+= curlen; + cpo+= oldlen; + } + + return cur; +} + +int DNA_elem_offset(SDNA *sdna, char *stype, char *vartype, char *name) +{ + + int SDNAnr= DNA_struct_find_nr(sdna, stype); + short *spo= sdna->structs[SDNAnr]; + char *cp= find_elem(sdna, vartype, name, spo, NULL, NULL); + return (int)((long)cp); /* intptr_t 2.48 XXX */ +} + |