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Prefer sizeof($$) to MAXSTRLEN + 1

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This makes `strsubUTF8` similar to `strrpl` and `strfmt`
This commit is contained in:
Rangi
2021-02-12 15:27:21 -05:00
committed by Eldred Habert
parent 8415ce3ed0
commit fc2bf3d11d
1 changed files with 5 additions and 5 deletions
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10
src/asm/parser.y
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@@ -108,7 +108,7 @@ static size_t strlenUTF8(const char *s)
return len; return len;
} }
static void strsubUTF8(char *dest, const char *src, uint32_t pos, uint32_t len) static void strsubUTF8(char *dest, size_t destLen, const char *src, uint32_t pos, uint32_t len)
{ {
size_t srcIndex = 0; size_t srcIndex = 0;
size_t destIndex = 0; size_t destIndex = 0;
@@ -141,7 +141,7 @@ static void strsubUTF8(char *dest, const char *src, uint32_t pos, uint32_t len)
(unsigned long)pos); (unsigned long)pos);
/* Copy from source to destination. */ /* Copy from source to destination. */
while (src[srcIndex] && destIndex < MAXSTRLEN && curLen < len) { while (src[srcIndex] && destIndex < destLen - 1 && curLen < len) {
switch (decode(&state, &codep, src[srcIndex])) { switch (decode(&state, &codep, src[srcIndex])) {
case 1: case 1:
fatalerror("STRSUB: Invalid UTF-8 character\n"); fatalerror("STRSUB: Invalid UTF-8 character\n");
@@ -160,7 +160,7 @@ static void strsubUTF8(char *dest, const char *src, uint32_t pos, uint32_t len)
if (state != 0) if (state != 0)
fatalerror("STRSUB: Invalid UTF-8 character\n"); fatalerror("STRSUB: Invalid UTF-8 character\n");
dest[destIndex] = 0; dest[destIndex] = '\0';
} }
static void strrpl(char *dest, size_t destLen, char const *src, char const *old, char const *new) static void strrpl(char *dest, size_t destLen, char const *src, char const *old, char const *new)
@@ -1402,7 +1402,7 @@ const_no_str : relocexpr_no_str {
string : T_STRING string : T_STRING
| T_OP_STRSUB T_LPAREN string T_COMMA uconst T_COMMA uconst T_RPAREN { | T_OP_STRSUB T_LPAREN string T_COMMA uconst T_COMMA uconst T_RPAREN {
strsubUTF8($$, $3, $5, $7); strsubUTF8($$, sizeof($$), $3, $5, $7);
} }
| T_OP_STRCAT T_LPAREN T_RPAREN { | T_OP_STRCAT T_LPAREN T_RPAREN {
$$[0] = '\0'; $$[0] = '\0';
@@ -1427,7 +1427,7 @@ string : T_STRING
strcat_args : string strcat_args : string
| strcat_args T_COMMA string { | strcat_args T_COMMA string {
if (snprintf($$, sizeof($$), "%s%s", $1, $3) > MAXSTRLEN) if (snprintf($$, sizeof($$), "%s%s", $1, $3) >= sizeof($$))
warning(WARNING_LONG_STR, "STRCAT: String too long '%s%s'\n", warning(WARNING_LONG_STR, "STRCAT: String too long '%s%s'\n",
$1, $3); $1, $3);
} }