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Fix by Eric Raymond: make the code that looks for various bits of 

tab-setting magic much smarter, more correct, and more easily
extensible.
This commit is contained in:
Guido van Rossum 2000-03-31 00:52:27 +00:00
parent a1f0a8f4a4
commit ab5ca15f94
1 changed files with 30 additions and 15 deletions
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45
Parser/tokenizer.c
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@ -564,24 +564,39 @@ PyTokenizer_Get(tok, p_start, p_end)
/* Set start of current token */
tok->start = tok->cur - 1;
/* Skip comment */
/* Skip comment, while looking for tab-setting magic */
if (c == '#') {
/* Hack to allow overriding the tabsize in the file.
This is also recognized by vi, when it occurs near the
beginning or end of the file. (Will vi never die...?)
For Python it must be at the beginning of the file! */
/* XXX The real vi syntax is actually different :-( */
/* XXX Should recognize Emacs syntax, too */
int x;
if (sscanf(tok->cur,
" vi:set tabsize=%d:", &x) == 1 &&
x >= 1 && x <= 40) {
/* PySys_WriteStderr("# vi:set tabsize=%d:\n", x); */
tok->tabsize = x;
}
static char *tabforms[] = {
"tab-width:", /* Emacs */
":tabstop=", /* vim, full form */
":ts=", /* vim, abbreviated form */
"set tabsize=", /* will vi never die? */
/* more templates can be added here to support other editors */
};
char cbuf[80];
char *tp, **cp;
tp = cbuf;
do {
*tp++ = c = tok_nextc(tok);
} while (c != EOF && c != '\n' &&
tp - cbuf + 1 < sizeof(cbuf));
*tp = '\0';
for (cp = tabforms;
cp < tabforms + sizeof(tabforms)/sizeof(tabforms[0]);
cp++) {
if ((tp = strstr(cbuf, *cp))) {
int newsize = atoi(tp + strlen(*cp));
if (newsize >= 1 && newsize <= 40) {
tok->tabsize = newsize;
PySys_WriteStderr(
"Tab size set to %d\n",
newsize);
}
}
}
while (c != EOF && c != '\n')
c = tok_nextc(tok);
} while (c != EOF && c != '\n');
}
/* Check for EOF and errors now */