Added string.rep() to the string library

This commit is contained in:
cpunch 2021-02-13 19:07:47 -06:00
parent 461e1d0c15
commit 14539057aa
2 changed files with 51 additions and 8 deletions

View File

@ -393,9 +393,11 @@ int cosmoB_sFind(CState *state, int nargs, CValue *args) {
char *indx = strstr(str->str, ptrn->str);
// failed, we have nothing to return
if (indx == NULL)
return 0;
// failed, return the error index -1
if (indx == NULL) {
cosmoV_pushNumber(state, -1);
return 1;
}
// success! push the index
cosmoV_pushNumber(state, indx - str->str);
@ -411,9 +413,11 @@ int cosmoB_sFind(CState *state, int nargs, CValue *args) {
char *indx = strstr(str->str + startIndx, ptrn->str);
// failed, we have nothing to return
if (indx == NULL)
return 0;
// failed, return the error index -1
if (indx == NULL) {
cosmoV_pushNumber(state, -1);
return 1;
}
// success! push the index
cosmoV_pushNumber(state, indx - str->str);
@ -526,6 +530,42 @@ int cosmoB_sLen(CState *state, int nargs, CValue *args) {
return 1;
}
int cosmoB_sRep(CState *state, int nargs, CValue *args) {
if (nargs != 2) {
cosmoV_error(state, "string.rep() expected 2 arguments, got %d!", nargs);
return 0;
}
// expects <string>, <number>
if (!IS_STRING(args[0]) || !IS_NUMBER(args[1])) {
cosmoV_typeError(state, "string.rep", "<string>, <number>", "%s, %s", cosmoV_typeStr(args[0]), cosmoV_typeStr(args[1]));
return 0;
}
CObjString *str = cosmoV_readString(args[0]);
int times = (int)cosmoV_readNumber(args[1]);
if (times <= 0) {
cosmoV_error(state, "Expected times to be > 0, got %d!", times);
return 0;
}
// allocated the new buffer for the string
size_t length = str->length * times;
char *newStr = cosmoM_xmalloc(state, length + 1); // + 1 for the NULL terminator
// copy the string over the new buffer
for (int i = 0; i < times; i++)
memcpy(&newStr[i * str->length], str->str, str->length);
// write the NULL terminator
newStr[length] = '\0';
// finally, push the resulting string onto the stack
cosmoV_pushRef(state, (CObj*)cosmoO_takeString(state, newStr, length));
return 1;
}
void cosmoB_loadStrLib(CState *state) {
const char *identifiers[] = {
"sub",
@ -533,7 +573,8 @@ void cosmoB_loadStrLib(CState *state) {
"split",
"byte",
"char",
"len"
"len",
"rep"
};
CosmoCFunction strLib[] = {
@ -542,7 +583,8 @@ void cosmoB_loadStrLib(CState *state) {
cosmoB_sSplit,
cosmoB_sByte,
cosmoB_sChar,
cosmoB_sLen
cosmoB_sLen,
cosmoB_sRep
};
// make string library object

View File

@ -29,6 +29,7 @@ COSMO_API void cosmoB_loadOSLib(CState *state);
- string.split & <string>:split()
- string.byte & <string>:byte()
- string.char & <string>:char()
- string.rep & <string>:rep()
The base proto object for strings is also set, allowing you to invoke the string.* api through string objects, eg.
`"hello world":split(" ")` is equivalent to `string.split("hello world", " ")`