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preproc: allow %pop to take an identifier, unify %push/%repl/%pop

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Allow the %pop directive to take an identifier (an assert on the
context name); unify the parsing parts of %push, %repl,  and %pop.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2008-10-24 16:24:21 -07:00
parent 59c2e54f25
commit 42b5639664
1 changed files with 34 additions and 46 deletions
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80
preproc.c
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@ -2338,68 +2338,56 @@ static int do_directive(Token * tline)
return DIRECTIVE_FOUND;
}
case PP_PUSH:
tline = tline->next;
skip_white_(tline);
tline = expand_id(tline);
if (tline) {
if (!tok_type_(tline, TOK_ID)) {
error(ERR_NONFATAL, "`%%push' expects a context identifier");
free_tlist(origline);
return DIRECTIVE_FOUND; /* but we did _something_ */
}
if (tline->next)
error(ERR_WARNING|ERR_PASS1,
"trailing garbage after `%%push' ignored");
p = nasm_strdup(tline->text);
} else {
p = NULL; /* Anonymous context */
}
ctx = nasm_malloc(sizeof(Context));
ctx->next = cstk;
hash_init(&ctx->localmac, HASH_SMALL);
ctx->name = p;
ctx->number = unique++;
cstk = ctx;
free_tlist(origline);
return DIRECTIVE_FOUND;
case PP_REPL:
case PP_POP:
tline = tline->next;
skip_white_(tline);
tline = expand_id(tline);
if (tline) {
if (!tok_type_(tline, TOK_ID)) {
error(ERR_NONFATAL, "`%%repl' expects a context identifier");
error(ERR_NONFATAL, "`%s' expects a context identifier",
pp_directives[i]);
free_tlist(origline);
return DIRECTIVE_FOUND; /* but we did _something_ */
}
if (tline->next)
error(ERR_WARNING|ERR_PASS1,
"trailing garbage after `%%repl' ignored");
"trailing garbage after `%s' ignored",
pp_directives[i]);
p = nasm_strdup(tline->text);
} else {
p = NULL;
p = NULL; /* Anonymous */
}
if (i == PP_PUSH) {
ctx = nasm_malloc(sizeof(Context));
ctx->next = cstk;
hash_init(&ctx->localmac, HASH_SMALL);
ctx->name = p;
ctx->number = unique++;
cstk = ctx;
} else {
/* %pop or %repl */
if (!cstk) {
error(ERR_NONFATAL, "`%s': context stack is empty",
pp_directives[i]);
} else if (i == PP_POP) {
if (p && (!cstk->name || nasm_stricmp(p, cstk->name)))
error(ERR_NONFATAL, "`%%pop' in wrong context: %s, "
"expected %s",
cstk->name ? cstk->name : "anonymous", p);
else
ctx_pop();
} else {
/* i == PP_REPL */
nasm_free(cstk->name);
cstk->name = p;
p = NULL;
}
nasm_free(p);
}
if (!cstk)
error(ERR_NONFATAL, "`%%repl': context stack is empty");
else {
nasm_free(cstk->name);
cstk->name = p;
}
free_tlist(origline);
return DIRECTIVE_FOUND;
case PP_POP:
if (tline->next)
error(ERR_WARNING|ERR_PASS1,
"trailing garbage after `%%pop' ignored");
if (!cstk)
error(ERR_NONFATAL, "`%%pop': context stack is already empty");
else
ctx_pop();
free_tlist(origline);
return DIRECTIVE_FOUND;
case PP_FATAL:
severity = ERR_FATAL|ERR_NO_SEVERITY;
goto issue_error;