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json: Use GString instead of QString to accumulate strings 

QString supports modifying its string, but it's quite limited: you can
only append.  The remaining callers use it for building an initial
string, never for modifying it later.

Change parse_string() to do build the initial string with GString.
This is another step towards making QString immutable.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201211171152.146877-18-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-12-11 18:11:49 +01:00
parent 3ddba9a9e9
commit 68af4cc121
1 changed files with 15 additions and 15 deletions
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30
qobject/json-parser.c
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@ -130,7 +130,7 @@ static int cvt4hex(const char *s)
static QString *parse_string(JSONParserContext *ctxt, JSONToken *token) static QString *parse_string(JSONParserContext *ctxt, JSONToken *token)
{ {
const char *ptr = token->str; const char *ptr = token->str;
QString *str; GString *str;
char quote; char quote;
const char *beg; const char *beg;
int cp, trailing; int cp, trailing;
@ -140,7 +140,7 @@ static QString *parse_string(JSONParserContext *ctxt, JSONToken *token)
assert(*ptr == '"' || *ptr == '\''); assert(*ptr == '"' || *ptr == '\'');
quote = *ptr++; quote = *ptr++;
str = qstring_new(); str = g_string_new(NULL);
while (*ptr != quote) { while (*ptr != quote) {
assert(*ptr); assert(*ptr);
@ -149,31 +149,31 @@ static QString *parse_string(JSONParserContext *ctxt, JSONToken *token)
beg = ptr++; beg = ptr++;
switch (*ptr++) { switch (*ptr++) {
case '"': case '"':
qstring_append_chr(str, '"'); g_string_append_c(str, '"');
break; break;
case '\'': case '\'':
qstring_append_chr(str, '\''); g_string_append_c(str, '\'');
break; break;
case '\\': case '\\':
qstring_append_chr(str, '\\'); g_string_append_c(str, '\\');
break; break;
case '/': case '/':
qstring_append_chr(str, '/'); g_string_append_c(str, '/');
break; break;
case 'b': case 'b':
qstring_append_chr(str, '\b'); g_string_append_c(str, '\b');
break; break;
case 'f': case 'f':
qstring_append_chr(str, '\f'); g_string_append_c(str, '\f');
break; break;
case 'n': case 'n':
qstring_append_chr(str, '\n'); g_string_append_c(str, '\n');
break; break;
case 'r': case 'r':
qstring_append_chr(str, '\r'); g_string_append_c(str, '\r');
break; break;
case 't': case 't':
qstring_append_chr(str, '\t'); g_string_append_c(str, '\t');
break; break;
case 'u': case 'u':
cp = cvt4hex(ptr); cp = cvt4hex(ptr);
@ -200,7 +200,7 @@ static QString *parse_string(JSONParserContext *ctxt, JSONToken *token)
(int)(ptr - beg), beg); (int)(ptr - beg), beg);
goto out; goto out;
} }
qstring_append(str, utf8_buf); g_string_append(str, utf8_buf);
break; break;
default: default:
parse_error(ctxt, token, "invalid escape sequence in string"); parse_error(ctxt, token, "invalid escape sequence in string");
@ -225,14 +225,14 @@ static QString *parse_string(JSONParserContext *ctxt, JSONToken *token)
ptr = end; ptr = end;
len = mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp); len = mod_utf8_encode(utf8_buf, sizeof(utf8_buf), cp);
assert(len >= 0); assert(len >= 0);
qstring_append(str, utf8_buf); g_string_append(str, utf8_buf);
} }
} }
return str; return qstring_from_gstring(str);
out: out:
qobject_unref(str); g_string_free(str, true);
return NULL; return NULL;
} }