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Fix string.format("%c", 0).

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This commit is contained in:
Mike Pall 2018-01-14 14:11:59 +01:00
parent 7dbf0b05f1
commit 430d9f8f7e
1 changed files with 8 additions and 7 deletions
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15
src/lib_string.c
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@ -850,20 +850,21 @@ LJLIB_CF(string_format)
} else { /* format item */
char form[MAX_FMTSPEC]; /* to store the format (`%...') */
char buff[MAX_FMTITEM]; /* to store the formatted item */
int n = 0;
if (++arg > top)
luaL_argerror(L, arg, lj_obj_typename[0]);
strfrmt = scanformat(L, strfrmt, form);
switch (*strfrmt++) {
case 'c':
sprintf(buff, form, lj_lib_checkint(L, arg));
n = sprintf(buff, form, lj_lib_checkint(L, arg));
break;
case 'd': case 'i':
addintlen(form);
sprintf(buff, form, num2intfrm(L, arg));
n = sprintf(buff, form, num2intfrm(L, arg));
break;
case 'o': case 'u': case 'x': case 'X':
addintlen(form);
sprintf(buff, form, num2uintfrm(L, arg));
n = sprintf(buff, form, num2uintfrm(L, arg));
break;
case 'e': case 'E': case 'f': case 'g': case 'G': case 'a': case 'A': {
TValue tv;
@ -880,10 +881,10 @@ LJLIB_CF(string_format)
nbuf[len] = '\0';
for (p = form; *p < 'A' && *p != '.'; p++) ;
*p++ = 's'; *p = '\0';
sprintf(buff, form, nbuf);
n = sprintf(buff, form, nbuf);
break;
}
sprintf(buff, form, (double)tv.n);
n = sprintf(buff, form, (double)tv.n);
break;
}
case 'q':
@ -902,14 +903,14 @@ LJLIB_CF(string_format)
luaL_addvalue(&b);
continue;
}
sprintf(buff, form, strdata(str));
n = sprintf(buff, form, strdata(str));
break;
}
default:
lj_err_callerv(L, LJ_ERR_STRFMTO, *(strfrmt -1));
break;
}
luaL_addlstring(&b, buff, strlen(buff));
luaL_addlstring(&b, buff, n);
}
}
luaL_pushresult(&b);