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lexical.c, update to master status (remove line length limit)

This commit is contained in:
h_vogt 2016-10-18 21:53:31 +02:00
parent 227c383c92
commit aab806b149
1 changed files with 109 additions and 80 deletions
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189
src/frontend/parser/lexical.c
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@ -41,8 +41,6 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
#endif
#endif
#define NEW_BSIZE_SP 2*BSIZE_SP
#include "ngspice/fteinput.h"
#include "lexical.h"
@ -65,7 +63,7 @@ static int numeofs = 0;
/* Return a list of words, with backslash quoting and '' quoting done.
* Strings en(void) closed in "" or `` are made single words and returned,
* Strings enclosed in "" or `` are made single words and returned,
* but with the "" or `` still present. For the \ and '' cases, the
* 8th bit is turned on (as in csh) to prevent them from being recognized,
* and stripped off once all processing is done. We also have to deal with
@ -74,15 +72,32 @@ static int numeofs = 0;
* have no business being in the string.
*/
struct cp_lexer_buf
{
int i, sz;
char *s;
};
static inline void
push(struct cp_lexer_buf *buf, int c)
{
if (buf->sz <= buf->i) {
buf->sz += MAX(64, buf->sz);
buf->s = TREALLOC(char, buf->s, buf->sz);
}
buf->s[buf->i++] = (char) c;
}
#define append(word) \
wl_append_word(&wlist, &cw, word)
wl_append_word(&wlist, &wlist_tail, word)
#define newword \
do { \
append(copy(buf)); \
bzero(buf, NEW_BSIZE_SP); \
i = 0; \
#define newword \
do { \
append(copy_substring(buf.s, buf.s + buf.i)); \
buf.i = 0; \
} while(0)
@ -123,9 +138,9 @@ wordlist *
cp_lexer(char *string)
{
int c, d;
int i, j;
wordlist *wlist = NULL, *cw = NULL;
char buf[NEW_BSIZE_SP], linebuf[NEW_BSIZE_SP];
int i;
wordlist *wlist, *wlist_tail;
struct cp_lexer_buf buf, linebuf;
int paren;
if (!cp_inp_cur)
@ -137,16 +152,24 @@ cp_lexer(char *string)
prompt();
}
wlist = wlist_tail = NULL;
buf.sz = 0;
buf.s = NULL;
linebuf.sz = 0;
linebuf.s = NULL;
nloop:
wlist = cw = NULL;
i = 0;
j = 0;
if (wlist)
wl_free(wlist);
wlist = wlist_tail = NULL;
buf.i = 0;
linebuf.i = 0;
paren = 0;
bzero(linebuf, NEW_BSIZE_SP);
bzero(buf, NEW_BSIZE_SP);
for (;;) {
/* if string, read from string, else read from stdin */
c = cp_readchar(&string, cp_inp_cur);
gotchar:
@ -155,110 +178,110 @@ nloop:
continue;
if ((c != EOF) && (c != ESCAPE))
linebuf[j++] = (char) c;
push(&linebuf, c);
if (c != EOF)
numeofs = 0;
if (i == NEW_BSIZE_SP - 1) {
fprintf(cp_err, "Warning: word too long.\n");
c = ' ';
}
if (j == NEW_BSIZE_SP - 1) {
fprintf(cp_err, "Warning: line too long.\n");
if (cp_bqflag)
c = EOF;
else
c = '\n';
}
if (c != EOF) /* Don't need to do this really. */
c = strip(c);
/* if '\' or '^', add following character to linebuf */
if ((c == '\\' && DIR_TERM != '\\') || (c == '\026') /* ^V */ ) {
c = quote(cp_readchar(&string, cp_inp_cur));
linebuf[j++] = (char) strip(c);
push(&linebuf, strip(c));
}
/* if reading from fcn backeval() for backquote subst. */
if ((c == '\n') && cp_bqflag)
c = ' ';
if ((c == EOF) && cp_bqflag)
c = '\n';
if ((c == cp_hash) && !cp_interactive && (j == 1)) {
wl_free(wlist);
wlist = cw = NULL;
if (string)
/* '#' as the first character in a line,
starts a comment line, drop it */
if ((c == cp_hash) && !cp_interactive && (linebuf.i == 1)) {
if (string) {
wl_free(wlist);
tfree(buf.s);
tfree(linebuf.s);
return NULL;
}
while (((c = cp_readchar(&string, cp_inp_cur)) != '\n') && (c != EOF))
;
goto nloop;
}
if ((c == '(') || (c == '[')) /* MW. Nedded by parse() */
/* check if we are inside of parens during reading:
if we are and ',' or ';' occur: no new line */
if ((c == '(') || (c == '['))
paren++;
else if ((c == ')') || (c == ']'))
paren--;
/* What else has to be decided, depending on c ? */
switch (c) {
/* new word to wordlist, when space or tab follow */
case ' ':
case '\t':
if (i > 0)
if (buf.i > 0)
newword;
break;
/* new word to wordlist, when \n follows */
case '\n':
if (i) {
buf[i] = '\0';
if (buf.i)
newword;
}
if (!cw)
if (!wlist_tail)
append(NULL);
goto done;
/* if ' read until next ' is hit, will form a new word,
but without the ' */
case '\'':
while (((c = cp_readchar(&string, cp_inp_cur)) != '\'') &&
(i < NEW_BSIZE_SP - 1))
while ((c = cp_readchar(&string, cp_inp_cur)) != '\'')
{
if ((c == '\n') || (c == EOF) || (c == ESCAPE))
goto gotchar;
buf[i++] = (char) quote(c);
linebuf[j++] = (char) c;
push(&buf, quote(c));
push(&linebuf, c);
}
linebuf[j++] = '\'';
push(&linebuf, '\'');
break;
/* if " or `, read until next " or ` is hit, will form a new word,
including the quotes.
In case of \, the next character gets the eights bit set. */
case '"':
case '`':
d = c;
buf[i++] = (char) d;
while (((c = cp_readchar(&string, cp_inp_cur)) != d) &&
(i < NEW_BSIZE_SP - 2))
push(&buf, d);
while ((c = cp_readchar(&string, cp_inp_cur)) != d)
{
if ((c == '\n') || (c == EOF) || (c == ESCAPE))
goto gotchar;
if (c == '\\') {
linebuf[j++] = (char) c;
push(&linebuf, c);
c = cp_readchar(&string, cp_inp_cur);
buf[i++] = (char) quote(c);
linebuf[j++] = (char) c;
push(&buf, quote(c));
push(&linebuf, c);
} else {
buf[i++] = (char) c;
linebuf[j++] = (char) c;
push(&buf, c);
push(&linebuf, c);
}
}
buf[i++] = (char) d;
linebuf[j++] = (char) d;
push(&buf, d);
push(&linebuf, d);
break;
case '\004':
case EOF:
/* upon command completion, not used actually */
if (cp_interactive && !cp_nocc && !string) {
if (j == 0) {
if (linebuf.i == 0) {
if (cp_ignoreeof && (numeofs++ < 23)) {
fputs("Use \"quit\" to quit.\n", stdout);
} else {
@ -269,18 +292,19 @@ nloop:
goto done;
}
push(&buf, '\0');
push(&linebuf, '\0');
// cp_ccom doesn't mess wlist, read only access to wlist->wl_word
cp_ccom(wlist, buf, FALSE);
wl_free(wlist);
cp_ccom(wlist, buf.s, FALSE);
(void) fputc('\r', cp_out);
prompt();
for (j = 0; linebuf[j]; j++)
for (i = 0; linebuf.s[i]; i++)
#ifdef TIOCSTI
(void) ioctl(fileno(cp_out), TIOCSTI, linebuf + j);
(void) ioctl(fileno(cp_out), TIOCSTI, linebuf.s + i);
#else
fputc(linebuf[j], cp_out); /* But you can't edit */
fputc(linebuf.s[i], cp_out); /* But you can't edit */
#endif
wlist = cw = NULL;
goto nloop;
}
@ -293,28 +317,31 @@ nloop:
}
wl_free(wlist);
tfree(buf.s);
tfree(linebuf.s);
return NULL;
case ESCAPE:
/* upon command completion, not used actually */
if (cp_interactive && !cp_nocc) {
push(&buf, '\0');
push(&linebuf, '\0');
fputs("\b\b \b\b\r", cp_out);
prompt();
for (j = 0; linebuf[j]; j++)
for (i = 0; linebuf.s[i]; i++)
#ifdef TIOCSTI
(void) ioctl(fileno(cp_out), TIOCSTI, linebuf + j);
(void) ioctl(fileno(cp_out), TIOCSTI, linebuf.s + i);
#else
fputc(linebuf[j], cp_out); /* But you can't edit */
fputc(linebuf.s[i], cp_out); /* But you can't edit */
#endif
// cp_ccom doesn't mess wlist, read only access to wlist->wl_word
cp_ccom(wlist, buf, TRUE);
wl_free(wlist);
wlist = cw = NULL;
cp_ccom(wlist, buf.s, TRUE);
goto nloop;
}
goto ldefault;
case ',':
if ((paren < 1) && (i > 0)) {
if ((paren < 1) && (buf.i > 0)) {
newword;
break;
}
@ -322,14 +349,14 @@ nloop:
case ';': /* CDHW semicolon inside parentheses is part of expression */
if (paren > 0) {
buf[i++] = (char) c;
push(&buf, c);
break;
}
goto ldefault;
case '&': /* va: $&name is one word */
if ((i >= 1) && (buf[i-1] == '$') && (c == '&')) {
buf[i++] = (char) c;
if ((buf.i >= 1) && (buf.s[buf.i - 1] == '$')) {
push(&buf, c);
break;
}
goto ldefault;
@ -337,8 +364,8 @@ nloop:
case '<':
case '>': /* va: <=, >= are unbreakable words */
if (string)
if ((i == 0) && (*string == '=')) {
buf[i++] = (char) c;
if ((buf.i == 0) && (*string == '=')) {
push(&buf, c);
break;
}
goto ldefault;
@ -348,12 +375,12 @@ nloop:
* here
*/
ldefault:
if ((cp_chars[c] & CPC_BRL) && (i > 0))
if ((c != '<') || (buf[i-1] != '$'))
if ((cp_chars[c] & CPC_BRL) && (buf.i > 0))
if ((c != '<') || (buf.s[buf.i - 1] != '$'))
newword;
buf[i++] = (char) c;
push(&buf, c);
if (cp_chars[c] & CPC_BRR)
if ((c != '<') || (i < 2) || (buf[i-2] != '$'))
if ((c != '<') || (buf.i < 2) || (buf.s[buf.i - 2] != '$'))
newword;
}
}
@ -361,6 +388,8 @@ nloop:
done:
if (wlist->wl_word)
pwlist_echo(wlist, "Command>");
tfree(buf.s);
tfree(linebuf.s);
return wlist;
}