1 Changes for CWEAVE for MSDOS and Borland C++ 3.1 using the following
2 options (and perhaps others):
4 -mc -w-pro -Ff=5000 -Z- -O-p
6 The options -Z- and -O-p explicitly turn off optimizations that break
7 the code. (See makefile.bs.)
9 The main purpose of these changes is to support MSDOS with full-size arrays
10 by using "huge" pointers.
12 This file contributed by Barry Schwartz, trashman@crud.mn.org, 28 Jun 94.
13 (Includes workaround for compiler bug [pointers wrapping around at
14 segment boundaries], November 1993, contributed by Jorge Fernandez Arnaiz
15 -- arnaiz@redvax1.dgsca.unam.mx)
16 (Last revised 5 Dec 94 with help of bob@microprograms.com.)
20 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
23 @d banner "This is CWEAVE (Version 3.64)\n"
25 The ``banner line'' defined here should be changed whenever \.{CWEAVE}
28 @d banner "This is CWEAVE (Version 3.64pc/big)\n"
36 typedef struct name_info {
37 char *byte_start; /* beginning of the name in |byte_mem| */
38 struct name_info *link;
40 struct name_info *Rlink; /* right link in binary search tree for section
42 char Ilk; /* used by identifiers in \.{CWEAVE} only */
44 char *equiv_or_xref; /* info corresponding to names */
45 } name_info; /* contains information about an identifier or section name */
46 typedef name_info *name_pointer; /* pointer into array of \&{name\_info}s */
47 typedef name_pointer *hash_pointer;
48 extern char byte_mem[]; /* characters of names */
49 extern char *byte_mem_end; /* end of |byte_mem| */
50 extern name_info name_dir[]; /* information about names */
51 extern name_pointer name_dir_end; /* end of |name_dir| */
52 extern name_pointer name_ptr; /* first unused position in |byte_start| */
53 extern char *byte_ptr; /* first unused position in |byte_mem| */
54 extern name_pointer hash[]; /* heads of hash lists */
55 extern hash_pointer hash_end; /* end of |hash| */
56 extern hash_pointer h; /* index into hash-head array */
57 extern name_pointer id_lookup(); /* looks up a string in the identifier table */
58 extern name_pointer section_lookup(); /* finds section name */
59 extern void print_section_name(), sprint_section_name();
66 typedef struct name_info {
67 char huge* byte_start; /* beginning of the name in |byte_mem| */
68 struct name_info *link;
70 struct name_info *Rlink; /* right link in binary search tree for section
72 char Ilk; /* used by identifiers in \.{CWEAVE} only */
76 char huge* xref_member;
77 } ptr_union; /* info corresponding to names */
78 } name_info; /* contains information about an identifier or section name */
79 typedef name_info *name_pointer; /* pointer into array of \&{name\_info}s */
80 typedef name_pointer *hash_pointer;
81 extern char huge byte_mem[]; /* characters of names */
82 extern char huge* byte_mem_end; /* end of |byte_mem| */
83 extern name_info name_dir[]; /* information about names */
84 extern name_pointer name_dir_end; /* end of |name_dir| */
85 extern name_pointer name_ptr; /* first unused position in |byte_start| */
86 extern char huge* byte_ptr; /* first unused position in |byte_mem| */
87 extern name_pointer hash[]; /* heads of hash lists */
88 extern hash_pointer hash_end; /* end of |hash| */
89 extern hash_pointer h; /* index into hash-head array */
90 extern name_pointer id_lookup(); /* looks up a string in the identifier table */
91 extern name_pointer section_lookup(); /* finds section name */
92 extern void print_section_name(), sprint_section_name();
97 typedef struct xref_info {
98 sixteen_bits num; /* section number plus zero or |def_flag| */
99 struct xref_info *xlink; /* pointer to the previous cross-reference */
101 typedef xref_info *xref_pointer;
103 typedef struct xref_info {
104 sixteen_bits num; /* section number plus zero or |def_flag| */
105 struct xref_info huge* xlink; /* pointer to the previous cross-reference */
107 typedef xref_info huge* xref_pointer;
112 xref_info xmem[max_refs]; /* contains cross-reference information */
113 xref_pointer xmem_end = xmem+max_refs-1;
115 xref_info huge xmem[max_refs]; /* contains cross-reference information */
116 xref_pointer xmem_end;
121 @d xref equiv_or_xref
123 @d xref ptr_union.xref_member
128 xref_ptr=xmem; name_dir->xref=(char*)xmem; xref_switch=0; section_xref_switch=0;
129 xmem->num=0; /* sentinel value */
131 xmem_end = xmem + max_refs - 1;
132 xref_ptr=xmem; name_dir->xref=(char*)xmem; xref_switch=0; section_xref_switch=0;
133 xmem->num=0; /* sentinel value */
138 append_xref(m); xref_ptr->xlink=q; p->xref=(char*)xref_ptr;
140 append_xref(m); xref_ptr->xlink=q; p->xref=(char huge*)xref_ptr;
145 if (r==xmem) p->xref=(char*)xref_ptr;
147 if (r==xmem) p->xref=(char huge*)xref_ptr;
152 q=(xref_pointer)p->xref;
153 if (q->num==file_flag) return;
154 append_xref(file_flag);
156 p->xref = (char *)xref_ptr;
158 q=(xref_pointer)p->xref;
159 if (q->num==file_flag) return;
160 append_xref(file_flag);
162 p->xref = (char huge*)xref_ptr;
165 @x Section 25. (to please Borland's C++, version 4.02)
166 token tok_mem[max_toks]; /* tokens */
167 token_pointer tok_mem_end = tok_mem+max_toks-1; /* end of |tok_mem| */
168 token_pointer tok_start[max_texts]; /* directory into |tok_mem| */
169 token_pointer tok_ptr; /* first unused position in |tok_mem| */
170 text_pointer text_ptr; /* first unused position in |tok_start| */
171 text_pointer tok_start_end = tok_start+max_texts-1; /* end of |tok_start| */
172 token_pointer max_tok_ptr; /* largest value of |tok_ptr| */
174 token tok_mem[max_toks]; /* tokens */
175 token_pointer tok_mem_end; /* end of |tok_mem| */
176 token_pointer tok_start[max_texts]; /* directory into |tok_mem| */
177 token_pointer tok_ptr; /* first unused position in |tok_mem| */
178 text_pointer text_ptr; /* first unused position in |tok_start| */
179 text_pointer tok_start_end; /* end of |tok_start| */
180 token_pointer max_tok_ptr; /* largest value of |tok_ptr| */
183 @x Section 26. (goes with the previous change)
184 tok_start[1]=tok_mem+1;
185 max_tok_ptr=tok_mem+1; max_text_ptr=tok_start+1;
187 tok_start[1]=tok_mem+1;
188 tok_mem_end=tok_mem+max_toks-1;
189 tok_start_end=tok_start+max_texts-1;
190 max_tok_ptr=tok_mem+1; max_text_ptr=tok_start+1;
195 p->ilk=t; p->xref=(char*)xmem;
197 p->ilk=t; p->xref=(char huge*)xmem;
204 p->xref=(char huge*)xmem;
209 if (unindexed(lhs)) { /* retain only underlined entries */
210 xref_pointer q,r=NULL;
211 for (q=(xref_pointer)lhs->xref;q>xmem;q=q->xlink)
213 if (r) r->xlink=q->xlink;
214 else lhs->xref=(char*)q->xlink;
218 if (unindexed(lhs)) { /* retain only underlined entries */
219 xref_pointer q,r=NULL;
220 for (q=(xref_pointer)lhs->xref;q>xmem;q=q->xlink)
222 if (r) r->xlink=q->xlink;
223 else lhs->xref=(char huge*)q->xlink;
230 char *k, *k_end=(p+1)->byte_start; /* pointers into |byte_mem| */
232 for (k=p->byte_start; k<k_end; k++) {
234 char huge* k, huge* k_end=(p+1)->byte_start; /* pointers into |byte_mem| */
236 for (k=p->byte_start; k<k_end; k++) {
241 append_xref(0); /* this number doesn't matter */
242 xref_ptr->xlink=(xref_pointer)p->xref; r=xref_ptr;
243 p->xref=(char*)xref_ptr;
244 while (r->xlink!=q) {r->num=r->xlink->num; r=r->xlink;}
245 r->num=m; /* everything from |q| on is left undisturbed */
247 append_xref(0); /* this number doesn't matter */
248 xref_ptr->xlink=(xref_pointer)p->xref; r=xref_ptr;
249 p->xref=(char huge*)xref_ptr;
250 while (r->xlink!=q) {r->num=r->xlink->num; r=r->xlink;}
251 r->num=m; /* everything from |q| on is left undisturbed */
256 @ @<Change |pp| to $\max...@>=
258 @ @<Change |pp| to $\max...@>=
260 if (d<0 && pp+d>pp) pp=scrap_base; /* segmented architecture caused wrap */
267 char *p; /* index into |byte_mem| */
269 char huge *p; /* index into |byte_mem| */
274 if (cur_name->xref!=(char*)xmem) {
276 if (cur_name->xref!=(char huge*)xmem) {
281 char *cur_byte; /* index into |byte_mem| */
283 char huge* cur_byte; /* index into |byte_mem| */
288 switch (cur_name->ilk) {
289 case normal: if (is_tiny(cur_name)) out_str("\\|");
292 switch (cur_name->ilk) {
293 case normal: if (is_tiny(cur_name)) out_str("\\|");
299 case custom: case quoted: {char *j; out_str("$\\");
301 case custom: case quoted: {char huge* j; out_str("$\\");