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fixed bug at16664

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This commit is contained in:
David Anderson 2006-02-07 08:56:36 +00:00
parent 208a57eaf8
commit a2bd08cf64
1 changed files with 50 additions and 45 deletions
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95
amxmodx/string.cpp
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@ -160,62 +160,67 @@ char* parse_arg(char** line, int& state)
return arg; return arg;
} }
bool fastcellcmp(cell *a, cell *b, cell len)
{
while (len--)
{
if (*a++ != *b++)
return false;
}
return true;
}
static cell AMX_NATIVE_CALL replace(AMX *amx, cell *params) /* 4 param */ static cell AMX_NATIVE_CALL replace(AMX *amx, cell *params) /* 4 param */
{ {
static char buffor[3072]; static char buffor[3072];
cell *a = get_amxaddr(amx, params[1]); cell *text = get_amxaddr(amx, params[1]);
cell *b = get_amxaddr(amx, params[3]); cell len = params[2];
cell *c = get_amxaddr(amx, params[4]); cell *what = get_amxaddr(amx, params[3]);
cell *with = get_amxaddr(amx, params[4]);
int iMain = amxstring_len(a); cell *origtext = text;
int iWhat = amxstring_len(b);
int iWith = amxstring_len(c); int withLen = amxstring_len(with);
int iPot = iMain + iWith - iWhat; int whatLen = amxstring_len(what);
int textLen = amxstring_len(text);
if (iPot >= params[2])
if (whatLen > textLen)
return 0;
if (whatLen < 1)
{ {
amx_RaiseError(amx,AMX_ERR_NATIVE); LogError(amx, AMX_ERR_NATIVE, "No search string specified.");
return 0; return 0;
} }
char *d = buffor; if (textLen - whatLen + withLen > len)
cell *x, *y, *z = a, *l = a;
int p = 0;
while (*a)
{ {
if (*a == *b) LogError(amx, AMX_ERR_NATIVE, "replace() buffer not big enough (%d>=%d)", (textLen - whatLen + withLen), len);
{ return 0;
x = a + 1;
y = b + 1;
p = 1;
if (!*y) break;
while (*x == *y)
{
x++; y++; p++;
if (!*y) break;
}
if (!*y) break;
p = 0;
*d++ = (char)*a++;
continue;
}
*d++ = (char)*a++;
} }
if (p) cell browsed = 0;
while (*text && (browsed <= (textLen-whatLen)))
{ {
while (*c) *d++ = (char)*c++; if (*text == *what)
a += p; {
while (*a) *d++ = (char)*a++; if (fastcellcmp(text, what, whatLen))
*d = 0; {
d = buffor; cell *saveptr = text + whatLen;
while (*d) *z++ = *d++; cell restlen = textLen - (browsed + whatLen);
*z = 0; cell amx_addr, *phys_addr;
return (z - l); amx_Allot(amx, restlen + 1, &amx_addr, &phys_addr);
memcpy(phys_addr, saveptr, (restlen + 1) * sizeof(cell));
memcpy(text, with, withLen * sizeof(cell));
text += withLen;
memcpy(text, phys_addr, (restlen + 1) * sizeof(cell));
amx_Release(amx, amx_addr);
return (textLen - whatLen + withLen);
}
}
text++;
browsed++;
} }
return 0; return 0;