michaelh/zephyr
1
0
Fork 0
Code Releases Activity

lib: json: use explicit unsigned char to avoid array subscript error

Browse source 
If we use newlib the isdigit (and other similar functions) return an
error as char can possibly be viewed as signed:

usr/include/ctype.h:57:54: error: array subscript has type ‘char’ [-Werror=char-subscripts]
 #define __ctype_lookup(__c) ((__ctype_ptr__+sizeof(""[__c]))[(int)(__c)])

Being explicit about the char being unsigned char deals with this.

Change-Id: If2416218220ef5b29f1a69470cbcc6b4fd49ef86
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2017-04-14 10:48:42 -05:00 • committed by Anas Nashif
commit 21309ea44b
1 changed files with 9 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

18
lib/json/json.c
View file

@ -24,9 +24,9 @@ struct token {
struct lexer {
void *(*state)(struct lexer *lexer);
char *start;
char *pos;
char *end;
unsigned char *start;
unsigned char *pos;
unsigned char *end;
struct token token;
};
@ -76,7 +76,7 @@ static void emit(struct lexer *lexer, enum json_tokens token)
lexer->start = lexer->pos;
}
static char next(struct lexer *lexer)
static unsigned char next(struct lexer *lexer)
{
if (lexer->pos >= lexer->end) {
lexer->pos = lexer->end + 1;
@ -97,9 +97,9 @@ static void backup(struct lexer *lexer)
lexer->pos--;
}
static char peek(struct lexer *lexer)
static unsigned char peek(struct lexer *lexer)
{
char chr = next(lexer);
unsigned char chr = next(lexer);
backup(lexer);
@ -111,7 +111,7 @@ static void *lexer_string(struct lexer *lexer)
ignore(lexer);
while (true) {
char chr = next(lexer);
unsigned char chr = next(lexer);
if (chr == '\0') {
emit(lexer, JSON_TOK_ERROR);
@ -216,7 +216,7 @@ static void *lexer_null(struct lexer *lexer)
static void *lexer_number(struct lexer *lexer)
{
while (true) {
char chr = next(lexer);
unsigned char chr = next(lexer);
if (isdigit(chr) || chr == '.') {
continue;
@ -232,7 +232,7 @@ static void *lexer_number(struct lexer *lexer)
static void *lexer_json(struct lexer *lexer)
{
while (true) {
char chr = next(lexer);
unsigned char chr = next(lexer);
switch (chr) {
case '\0':