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preproc: Extract reading line from predefined macros from read_line

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It makes read_line less complex

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Cyrill Gorcunov 2010-07-13 11:27:41 +04:00
parent 924df0d498
commit 15bdc51187
1 changed files with 83 additions and 60 deletions
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143
preproc.c
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@ -680,6 +680,80 @@ hash_findix(struct hash_table *hash, const char *str)
return p ? *p : NULL;
}
/*
* read line from standart macros set,
* if there no more left -- return NULL
*/
static char *line_from_stdmac(void)
{
unsigned char c;
const unsigned char *p = stdmacpos;
char *line, *q;
size_t len = 0;
if (!stdmacpos)
return NULL;
while ((c = *p++)) {
if (c >= 0x80)
len += pp_directives_len[c - 0x80] + 1;
else
len++;
}
line = nasm_malloc(len + 1);
q = line;
while ((c = *stdmacpos++)) {
if (c >= 0x80) {
memcpy(q, pp_directives[c - 0x80], pp_directives_len[c - 0x80]);
q += pp_directives_len[c - 0x80];
*q++ = ' ';
} else {
*q++ = c;
}
}
stdmacpos = p;
*q = '\0';
if (!*stdmacpos) {
/* This was the last of the standard macro chain... */
stdmacpos = NULL;
if (any_extrastdmac) {
stdmacpos = extrastdmac;
any_extrastdmac = false;
} else if (do_predef) {
Line *pd, *l;
Token *head, **tail, *t;
/*
* Nasty hack: here we push the contents of
* `predef' on to the top-level expansion stack,
* since this is the most convenient way to
* implement the pre-include and pre-define
* features.
*/
list_for_each(pd, predef) {
head = NULL;
tail = &head;
list_for_each(t, pd->first) {
*tail = new_Token(NULL, t->type, t->text, 0);
tail = &(*tail)->next;
}
l = nasm_malloc(sizeof(Line));
l->next = istk->expansion;
l->first = head;
l->finishes = NULL;
istk->expansion = l;
}
do_predef = false;
}
}
return line;
}
#define BUF_DELTA 512
/*
* Read a line from the top file in istk, handling multiple CR/LFs
@ -692,67 +766,16 @@ static char *read_line(void)
char *buffer, *p, *q;
int bufsize, continued_count;
if (stdmacpos) {
unsigned char c;
const unsigned char *p = stdmacpos;
char *ret, *q;
size_t len = 0;
while ((c = *p++)) {
if (c >= 0x80)
len += pp_directives_len[c-0x80]+1;
else
len++;
}
ret = nasm_malloc(len+1);
q = ret;
while ((c = *stdmacpos++)) {
if (c >= 0x80) {
memcpy(q, pp_directives[c-0x80], pp_directives_len[c-0x80]);
q += pp_directives_len[c-0x80];
*q++ = ' ';
} else {
*q++ = c;
}
}
stdmacpos = p;
*q = '\0';
if (!*stdmacpos) {
/* This was the last of the standard macro chain... */
stdmacpos = NULL;
if (any_extrastdmac) {
stdmacpos = extrastdmac;
any_extrastdmac = false;
} else if (do_predef) {
Line *pd, *l;
Token *head, **tail, *t;
/*
* Nasty hack: here we push the contents of
* `predef' on to the top-level expansion stack,
* since this is the most convenient way to
* implement the pre-include and pre-define
* features.
*/
list_for_each(pd, predef) {
head = NULL;
tail = &head;
list_for_each(t, pd->first) {
*tail = new_Token(NULL, t->type, t->text, 0);
tail = &(*tail)->next;
}
l = nasm_malloc(sizeof(Line));
l->next = istk->expansion;
l->first = head;
l->finishes = NULL;
istk->expansion = l;
}
do_predef = false;
}
}
return ret;
}
/*
* standart macros set (predefined) goes first
*/
p = line_from_stdmac();
if (p)
return p;
/*
* regular read from a file
*/
bufsize = BUF_DELTA;
buffer = nasm_malloc(BUF_DELTA);
p = buffer;