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Fix parse_settings to match internal documentation

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* xsettings.c (parse_settings): Return the number of settings seen.
Count the settings changes accurately.
(read_settings): Don't confuse number of settings changes with
the return code from XGetWindowProperty.
This commit is contained in:
Paul Eggert 2014-12-27 12:00:29 -08:00
parent 0db7db3090
commit 3d1afd119e
2 changed files with 27 additions and 17 deletions
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8
src/ChangeLog
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@ -1,3 +1,11 @@
2014-12-27 Paul Eggert <eggert@cs.ucla.edu>
Fix parse_settings to match internal documentation
* xsettings.c (parse_settings): Return the number of settings seen.
Count the settings changes accurately.
(read_settings): Don't confuse number of settings changes with
the return code from XGetWindowProperty.
2014-12-27 Eli Zaretskii <eliz@gnu.org>
* xdisp.c (set_iterator_to_next) <GET_FROM_STRING>: Limit search in

36
src/xsettings.c
View file

@ -404,7 +404,7 @@ parse_settings (unsigned char *prop,
/* First 4 bytes is a serial number, skip that. */
if (bytes < 12) return BadLength;
if (bytes < 12) return settings_seen;
memcpy (&n_settings, prop+8, 4);
if (my_bo != that_bo) n_settings = bswap_32 (n_settings);
bytes_parsed = 12;
@ -429,8 +429,8 @@ parse_settings (unsigned char *prop,
memcpy (&nlen, prop+bytes_parsed, 2);
bytes_parsed += 2;
if (my_bo != that_bo) nlen = bswap_16 (nlen);
if (bytes_parsed+nlen > bytes) return BadLength;
to_cpy = nlen > 127 ? 127 : nlen;
if (bytes_parsed + nlen > bytes) return settings_seen;
to_cpy = min (nlen, sizeof name - 1);
memcpy (name, prop+bytes_parsed, to_cpy);
name[to_cpy] = '\0';
@ -438,20 +438,19 @@ parse_settings (unsigned char *prop,
bytes_parsed = PAD (bytes_parsed);
bytes_parsed += 4; /* Skip serial for this value */
if (bytes_parsed > bytes) return BadLength;
if (bytes_parsed > bytes) return settings_seen;
want_this =
want_this = strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0;
#ifdef HAVE_XFT
(nlen > 6 && strncmp (name, "Xft/", 4) == 0)
|| strcmp (XSETTINGS_FONT_NAME, name) == 0
||
if ((nlen > 6 && memcmp (name, "Xft/", 4) == 0)
|| strcmp (XSETTINGS_FONT_NAME, name) == 0)
want_this = true;
#endif
strcmp (XSETTINGS_TOOL_BAR_STYLE, name) == 0;
switch (type)
{
case 0: /* Integer */
if (bytes_parsed+4 > bytes) return BadLength;
if (bytes_parsed + 4 > bytes) return settings_seen;
if (want_this)
{
memcpy (&ival, prop+bytes_parsed, 4);
@ -461,13 +460,13 @@ parse_settings (unsigned char *prop,
break;
case 1: /* String */
if (bytes_parsed+4 > bytes) return BadLength;
if (bytes_parsed + 4 > bytes) return settings_seen;
memcpy (&vlen, prop+bytes_parsed, 4);
bytes_parsed += 4;
if (my_bo != that_bo) vlen = bswap_32 (vlen);
if (want_this)
{
to_cpy = vlen > 127 ? 127 : vlen;
to_cpy = min (vlen, sizeof sval - 1);
memcpy (sval, prop+bytes_parsed, to_cpy);
sval[to_cpy] = '\0';
}
@ -477,17 +476,16 @@ parse_settings (unsigned char *prop,
case 2: /* RGB value */
/* No need to parse this */
if (bytes_parsed+8 > bytes) return BadLength;
if (bytes_parsed + 8 > bytes) return settings_seen;
bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each. */
break;
default: /* Parse Error */
return BadValue;
return settings_seen;
}
if (want_this)
{
++settings_seen;
if (strcmp (name, XSETTINGS_TOOL_BAR_STYLE) == 0)
{
dupstring (&settings->tb_style, sval);
@ -557,6 +555,9 @@ parse_settings (unsigned char *prop,
settings->seen &= ~SEEN_LCDFILTER;
}
#endif /* HAVE_XFT */
else
want_this = false;
settings_seen += want_this;
}
}
@ -576,6 +577,7 @@ read_settings (struct x_display_info *dpyinfo, struct xsettings *settings)
unsigned char *prop = NULL;
Display *dpy = dpyinfo->display;
int rc;
bool got_settings = false;
x_catch_errors (dpy);
rc = XGetWindowProperty (dpy,
@ -587,13 +589,13 @@ read_settings (struct x_display_info *dpyinfo, struct xsettings *settings)
if (rc == Success && prop != NULL && act_form == 8 && nitems > 0
&& act_type == dpyinfo->Xatom_xsettings_prop)
rc = parse_settings (prop, nitems, settings);
got_settings = parse_settings (prop, nitems, settings) != 0;
XFree (prop);
x_uncatch_errors ();
return rc != 0;
return got_settings;
}
/* Apply Xft settings in SETTINGS to the Xft library.