mirror of
https://github.com/elliotnunn/mac-rom.git
synced 2024-12-29 07:29:15 +00:00
696 lines
12 KiB
C
696 lines
12 KiB
C
#define C_PAD 0
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#define C_FIRST 1
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#define C_LAST 2
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#define C_COMMENT 3
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#define C_DICT 4
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#define C_MODULE 5
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#define C_ENTRYPT 6
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#define C_SIZE 7
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#define C_CONTENTS 8
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#define C_REF 9
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#define C_COMPREF 10
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/* DATA STRUCTURES */
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typedef unsigned char uchar;
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typedef unsigned short ushort;
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typedef unsigned long ulong;
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typedef unsigned short id;
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/* Ugh! */
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#ifndef __GNUC__
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#define ntohs
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#define ntohl
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#define htons
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#define htonl
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#endif
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#define NULL 0
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ushort shortfrom(char *b)
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{
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return ntohs(*(ushort *)b);
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}
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void setshort(char *b, ushort to)
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{
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*(ushort *)b = htons(to);
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}
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ulong longfrom(char *b)
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{
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return ntohl(*(ulong *)b);
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}
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void setlong(char *b, ulong to)
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{
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*(ulong *)b = htonl(to);
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}
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/* Wraps an MPW Object buffer */
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struct obj
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{
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char *buf, *at;
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id next_id;
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};
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/* PASCAL STRING COMPARISON, CASE-INSENSITIVE */
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int cisc(uchar *a, uchar *b)
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{
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int i;
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if(*a != *b) return 0;
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for(i=1; i<=*a; i++)
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{
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uchar c, d;
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c = a[i];
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d = b[i];
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// if(c >= 'a' && c <= 'z') c &= 223;
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// if(d >= 'a' && d <= 'z') d &= 223;
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if(c == d) continue;
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return 0;
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}
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return 1;
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}
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void upperpas(uchar *a)
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{
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int i;
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for(i=1; i<=*a; i++)
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{
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if(a[i] >= 'a' && a[i] <= 'z') a[i] &= 223;
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}
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}
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/* ACCESSOR FUNCTIONS */
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/* Valid for all types */
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char obj_type(struct obj *o)
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{
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return o->at[0];
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}
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/* Valid for First, Dict, Module, EntryPt, Size, Contents, Ref, CompRef */
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char obj_flags(struct obj *o)
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{
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return o->at[1];
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}
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/* Valid for Module, EntryPt */
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id obj_id(struct obj *o)
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{
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return ntohs(*(id *)(o->at + 2));
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}
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/* Valid for Dict */
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id obj_dictfirst(struct obj *o)
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{
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return ntohs(*(id *)(o->at + 4));
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}
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/* Valid for Comment, Dict, Contents, Ref, CompRef */
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unsigned short obj_recsize(struct obj *o)
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{
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return ntohs(*(unsigned short *)(o->at + 2));
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}
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/* Valid for Size */
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unsigned short obj_contsize(struct obj *o)
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{
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return ntohs(*(unsigned long *)(o->at + 2));
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}
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/* Valid for all types */
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unsigned long obj_size(struct obj *o)
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{
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char t;
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t = obj_type(o);
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if(t == C_COMMENT || t == C_DICT || t == C_CONTENTS || t == C_REF || t == C_COMPREF)
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{
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return obj_recsize(o);
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}
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else if(t == C_PAD)
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{
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return 1;
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}
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else if(t == C_FIRST)
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{
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return 4;
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}
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else if(t == C_MODULE)
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{
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return 6;
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}
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else if(t == C_ENTRYPT)
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{
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return 8;
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}
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else if(t == C_SIZE)
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{
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return 6;
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}
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else if(t == C_LAST)
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{
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return 2;
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}
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else
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{
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printf("Illegal object type at offset 0x%x: %d\n", (ulong)o->at - (ulong)o->buf, t);
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return 1;
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}
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}
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/* CURSOR MANIPULATOR FUNCTIONS */
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void obj_init(struct obj *o, char *buf)
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{
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o->at = o->buf = buf;
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}
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void _obj_next_general(struct obj *o, int can_loop)
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{
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if((long)o->at & 1) o->at ++;
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if(obj_type(o) == C_LAST)
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{
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//printf("Got a lastie\n");
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if(can_loop) o->at = o->buf;
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}
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else
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{
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//printf("Got a %d %d\n", obj_type(o), obj_size(o));
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o->at += obj_size(o);
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}
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if((long)o->at & 1) o->at ++;
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}
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/* Gets the next object without looping */
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void obj_next(struct obj *o)
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{
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_obj_next_general(o, 0);
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}
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/* Gets the specified module with looping */
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void obj_findmod(struct obj *o, id mod_id)
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{
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char *first;
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first = o->at;
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while(obj_type(o) != C_MODULE || obj_id(o) != mod_id)
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{
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_obj_next_general(o, 1);
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if(o->at == first)
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{
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o->at = o->buf;
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}
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}
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}
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/* Gets the next dict with looping */
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void dict_next(struct obj *o)
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{
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do
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{
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printf("xx %d\n", obj_type(o));
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_obj_next_general(o, 1);
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}
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while(obj_type(o) != C_DICT);
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}
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void obj_pad(struct obj *o)
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{
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if((long)o->at & 1) *o->at++ = 0;
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}
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int obj_nextinmod(struct obj *o)
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{
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char *at = o->at;
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if(obj_type(o) == C_LAST) return 0;
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_obj_next_general(o, 0);
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if(obj_type(o) == C_LAST || obj_type(o) == C_MODULE)
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{
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return 0;
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o->at = at;
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}
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return 1;
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}
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int obj_nextmod(struct obj *o)
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{
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char *at = o->at;
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if(obj_type(o) == C_LAST) return 0;
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do
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{
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_obj_next_general(o, 0);
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if(obj_type(o) == C_LAST) return 0;
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} while(obj_type(o) != C_MODULE);
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return 1;
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}
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/* DICT APPEND FUNCTION */
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void dict_append_v(struct obj *o, uchar *s, id hint_id)
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{
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ushort oldlen;
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if(obj_type(o) != C_DICT || shortfrom(o->at + 2) > 10000)
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{
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obj_next(o);
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o->at[0] = C_DICT;
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o->at[1] = 0; /* flags */
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setshort(o->at+2, 6); /* size */
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setshort(o->at+4, hint_id); /* first id */
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}
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oldlen = shortfrom(o->at + 2);
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o->at[oldlen+0] = *s + 5;
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o->at[oldlen+1] = '_';
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o->at[oldlen+2] = '_';
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o->at[oldlen+3] = 'v';
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o->at[oldlen+4] = '_';
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o->at[oldlen+5] = '_';
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memcpy(o->at + oldlen + 6, s + 1, *s);
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setshort(o->at + 2, oldlen + *s + 6);
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}
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/* DICT SEARCH FUNCTIONS, WHICH HAVE SIDE EFFECTS */
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id dict_id_from_str(struct obj *o, unsigned char *str)
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{
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char *first_searched = NULL;
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//printf("DICT %x: %.*s = \n", o, *str, str+1);
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for(;;)
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{
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if(obj_type(o) == C_DICT)
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{
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unsigned int ctr, tlen;
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unsigned char *ptr;
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tlen = ntohs(*(unsigned short *)(o->at + 2));
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ctr = ntohs(*(unsigned short *)(o->at + 4));
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ptr = (uchar *)((long)o->at + 6);
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do
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{
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//if(ptr[0] == str[0] && !memcmp(ptr+1, str+1, str[0]))
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if(cisc(ptr, str))
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{
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//printf("%d\n", ctr);
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return ctr;
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}
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ptr += ptr[0] + 1;
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ctr++;
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} while((ulong)ptr < (ulong)o->at + tlen);
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}
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_obj_next_general(o, 1);
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if(o->at == first_searched) return 0;
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if(!first_searched) first_searched = o->at;
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}
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//printf("(not found)\n");
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return 0;
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}
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uchar *dict_str_from_id(struct obj *o, id id)
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{
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char *first_searched = NULL;
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//printf("DICT %x: %d = ", o, id);
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for(;;)
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{
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if(obj_type(o) == C_DICT)
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{
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unsigned int ctr, tlen;
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unsigned char *ptr;
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tlen = ntohs(*(unsigned short *)(o->at + 2));
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ctr = ntohs(*(unsigned short *)(o->at + 4));
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ptr = (uchar *)((long)o->at + 6);
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if(ctr <= id)
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{
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do
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{
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if(ctr == id)
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{
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//printf("%.*s\n", *ptr, ptr+1);
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return ptr;
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}
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ptr += ptr[0] + 1;
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ctr++;
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} while((ulong)ptr < (ulong)o->at + tlen);
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}
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}
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_obj_next_general(o, 1);
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if(o->at == first_searched) return 0;
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if(!first_searched) first_searched = o->at;
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}
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//printf("(not found)\n");
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return NULL;
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}
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id dict_highestid(struct obj *o)
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{
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id ctr;
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unsigned int tlen;
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unsigned char *ptr;
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tlen = ntohs(*(unsigned short *)(o->at + 2));
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ctr = (id)ntohs(*(unsigned short *)(o->at + 4));
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ptr = (uchar *)((long)o->at + 6);
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do
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{
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ptr += ptr[0] + 1;
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ctr++;
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} while((ulong)ptr < (ulong)o->at + tlen);
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return ctr - 1;
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}
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/* NEWDICT FUNCTIONS */
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struct newdict
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{
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struct newdict *prev, *next; /* linked list */
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id new_id; /* increments from 256 */
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id old_id;
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id patch_id; /* if this ID is just vector glue and self.next is the implementation */
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uchar name[256]; /* duh */
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int defining_file;
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int malloc_size; /* only for the main dict object */
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int fcnt;
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struct newdict ***cache;
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//id id_in_file[99]; /* malloc makes this array *just right* */
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};
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void newdict_init(struct newdict *d, int file_count)
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{
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d->prev = d->next = d;
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d->new_id = 255;
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d->fcnt = file_count;
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d->malloc_size = sizeof *d; //sizeof(*d) + (file_count - 99) * sizeof(d->id_in_file[0]);
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}
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void newdict_cache(struct newdict *d)
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{
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int i;
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struct newdict *s;
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d->cache = (struct newdict ***)calloc(d->fcnt, sizeof d->cache[0]);
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for(i=0; i<d->fcnt; i++)
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{
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d->cache[i] = (struct newdict **)calloc(65536, sizeof d->cache[0][0]);
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}
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for(s = d->next; s != d; s = s->next)
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{
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d->cache[s->defining_file][s->old_id] = s;
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}
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}
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id newdict_append(struct newdict *d, int file_idx, id orig_id, uchar *name)
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{
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struct newdict *s;
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s = (struct newdict *)calloc(d->malloc_size, 1);
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if(!s)
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{
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return 0;
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}
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s->next = d;
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s->prev = d->prev;
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s->prev->next = s;
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d->prev = s;
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s->new_id = s->prev->new_id + 1;
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memcpy(s->name, name, name[0]+1);
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s->defining_file = file_idx;
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//s->id_in_file[file_idx] = orig_id;
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s->old_id = orig_id;
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return s->new_id;
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}
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struct newdict *newdict_find(struct newdict *d, int file_idx, id mid)
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{
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// struct newdict *s;
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// for(s = d->next; s != d; s = s->next)
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// {
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// if(s->id_in_file[file_idx] == mid) return s;
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// }
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// return (struct newdict *)0;
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return d->cache[file_idx][mid];
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}
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// void newdict_debug_dump(struct newdict *d, char **file_names)
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// {
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// struct newdict *s;
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// int i;
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// printf("NEWDICT_DEBUG_DUMP\n");
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// for(s = d->next; s != d; s = s->next)
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// {
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// printf(" %d %.*s", s->new_id, *s->name, s->name+1);
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// if(s->defining_file != -1)
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// {
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// if(file_names)
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// {
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// printf(" (%s:%d)", file_names[s->defining_file], s->id_in_file[s->defining_file]);
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// }
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// else
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// {
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// printf(" (file_%d:%d)", s->defining_file, s->id_in_file[s->defining_file]);
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// }
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// }
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// if(s->patch_id)
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// {
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// printf(" (patch ID %d, next line is implementation:)", s->patch_id);
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// }
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// printf("\n %d:%d", s->defining_file, s->id_in_file[s->defining_file]);
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// for(i=0; i<d->fcnt; i++)
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// {
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// if(i == s->defining_file) continue;
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// if(!s->id_in_file[i]) continue;
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// printf(" %d:%d", i, s->id_in_file[i]);
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// }
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// printf("\n");
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// }
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// }
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unsigned long newdict_dump(struct newdict *d, char *o)
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{
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unsigned long l = 0;
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struct newdict *s = d->next;
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while(s != d)
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{
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long tl = 0;
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o[l] = C_DICT;
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o[l+1] = 0; /* 0 => names needed for code/data relocation.
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1 => names needed for symbolic debugging only
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(in which case they are ignored when doing a
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non-symbolic link) */
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*(ushort *)(o + l + 4) = htons(s->new_id);
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tl = 6;
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while(s != d && tl < 10000)
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{
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memcpy(o + l + tl, s->name, s->name[0]+1);
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tl += s->name[0]+1;
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s = s->next;
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}
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/* doing the record! */
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*(id *)(o + l + 2) = htons(tl);
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if(tl & 1) o[l + tl++] = 0;
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l += tl;
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}
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return l;
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}
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// id newdict_lookup_backend(struct newdict *d, uchar *str, long major, long minor)
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// {
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// struct newdict *s;
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// for(s = d->prev; s != d; s = s->prev)
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// {
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// if(major == -1 || minor == -1 || (s->major == major && s->minor == minor))
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// {
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// if(cisc(str, s->str))
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// {
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// return s->n;
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// }
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// }
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// }
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// return 0;
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// }
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// id newdict_id_from_str_with_hint(struct newdict *d, uchar *str, long major, long minor)
|
|
// {
|
|
// id id;
|
|
|
|
// id = newdict_lookup_backend(d, str, major, minor);
|
|
// if(id) return id;
|
|
|
|
// id = newdict_lookup_backend(d, str, -1, -1);
|
|
// if(id) return id;
|
|
|
|
// id = newdict_append(d, str, major, minor);
|
|
// return id;
|
|
// }
|
|
|
|
|
|
|
|
/* COMPLETE ODDBALL */
|
|
|
|
// void reref(char **dest, long major, struct newdict *destdict, struct obj *src, struct obj *srcdict, id specialfrom, id specialto)
|
|
// {
|
|
// const char OFFSETS[11][3] = {
|
|
// /* 0*/ {0},
|
|
// /* 1*/ {0},
|
|
// /* 2*/ {0},
|
|
// /* 3*/ {0},
|
|
// /* 4*/ {0},
|
|
// /* 5*/ {2,4,0},
|
|
// /* 6*/ {2,0},
|
|
// /* 7*/ {0},
|
|
// /* 8*/ {0},
|
|
// /* 9*/ {4,0},
|
|
// /*10*/ {4,6,0},
|
|
// };
|
|
|
|
// unsigned long len;
|
|
// char t;
|
|
// int i;
|
|
|
|
// len = obj_size(src);
|
|
// t = obj_type(src);
|
|
|
|
// memcpy(*dest, src->at, len);
|
|
|
|
// for(i=0; OFFSETS[t][i]; i++)
|
|
// {
|
|
// id is;
|
|
|
|
// is = ntohs(*(id *)(*dest + OFFSETS[t][i]));
|
|
|
|
// //printf("Converting: type %d offset %d original %d special %d->%d\n", t, OFFSETS[t][i], is, specialfrom, specialto);
|
|
|
|
// if(is == specialfrom)
|
|
// {
|
|
// is = specialto;
|
|
// }
|
|
// else
|
|
// {
|
|
// uchar *str = dict_str_from_id(srcdict, is);
|
|
// if(!str) printf("Bullshit string\n");
|
|
// //printf("... intermediate string %x %.*s\n", str, *str, str+1);
|
|
// is = newdict_id_from_str_with_hint(destdict, str, major, is);
|
|
// }
|
|
|
|
// //printf("... to %d\n", is);
|
|
|
|
// *(id *)(*dest + OFFSETS[t][i]) = htons(is);
|
|
// }
|
|
|
|
// *dest += len;
|
|
|
|
// if((long)(*dest) & 1) *(*dest)++ = 0;
|
|
// }
|
|
|
|
|
|
void obj_copy(struct obj *dest, struct obj *src)
|
|
{
|
|
char *destthing;
|
|
|
|
obj_next(dest);
|
|
destthing = dest->at;
|
|
|
|
memcpy(destthing, src->at, obj_size(src));
|
|
|
|
obj_next(dest);
|
|
obj_pad(dest);
|
|
dest->at = destthing;
|
|
}
|
|
|
|
int obj_islastinmod(struct obj *o)
|
|
{
|
|
struct obj j;
|
|
char t;
|
|
|
|
memcpy(&j, o, sizeof (struct obj));
|
|
|
|
obj_next(&j);
|
|
t = obj_type(&j);
|
|
|
|
return t == C_MODULE || t == C_LAST;
|
|
} |