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Code Issues Releases Wiki Activity

Added String.padStart polyfill

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This commit is contained in:
Bryan Roe
2019-02-08 15:23:39 -08:00
parent 6afb6e5316
commit 52d0510e7b
1 changed files with 58 additions and 0 deletions
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58
microscript/ILibDuktape_Polyfills.c
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@@ -280,6 +280,62 @@ duk_ret_t ILibDuktape_Polyfills_String_endsWith(duk_context *ctx)
return 1;
}
duk_ret_t ILibDuktape_Polyfills_String_padStart(duk_context *ctx)
{
int totalLen = (int)duk_require_int(ctx, 0);
duk_size_t padcharLen;
duk_size_t bufferLen;
char *padchars;
if (duk_get_top(ctx) > 1)
{
padchars = (char*)duk_get_lstring(ctx, 1, &padcharLen);
}
else
{
padchars = " ";
padcharLen = 1;
}
duk_push_this(ctx);
char *buffer = Duktape_GetBuffer(ctx, -1, &bufferLen);
if (bufferLen > totalLen)
{
duk_push_lstring(ctx, buffer, bufferLen);
return(1);
}
else
{
duk_size_t needs = totalLen - bufferLen;
duk_size_t i;
duk_push_array(ctx); // [array]
while(needs > 0)
{
if (needs > padcharLen)
{
duk_push_string(ctx, padchars); // [array][pad]
duk_put_prop_index(ctx, -2, duk_get_length(ctx, -2)); // [array]
needs -= padcharLen;
}
else
{
duk_push_lstring(ctx, padchars, needs); // [array][pad]
duk_put_prop_index(ctx, -2, duk_get_length(ctx, -2)); // [array]
needs = 0;
}
}
duk_push_lstring(ctx, buffer, bufferLen); // [array][pad]
duk_put_prop_index(ctx, -2, duk_get_length(ctx, -2)); // [array]
duk_get_prop_string(ctx, -1, "join"); // [array][join]
duk_swap_top(ctx, -2); // [join][this]
duk_push_string(ctx, ""); // [join][this]['']
duk_call_method(ctx, 1); // [result]
return(1);
}
}
void ILibDuktape_Polyfills_String(duk_context *ctx)
{
// Polyfill 'String.startsWith'
@@ -289,6 +345,8 @@ void ILibDuktape_Polyfills_String(duk_context *ctx)
duk_put_prop_string(ctx, -2, "startsWith"); // [string][proto]
duk_push_c_function(ctx, ILibDuktape_Polyfills_String_endsWith, DUK_VARARGS); // [string][proto][func]
duk_put_prop_string(ctx, -2, "endsWith"); // [string][proto]
duk_push_c_function(ctx, ILibDuktape_Polyfills_String_padStart, DUK_VARARGS); // [string][proto][func]
duk_put_prop_string(ctx, -2, "padStart");
duk_pop_2(ctx);
}
duk_ret_t ILibDuktape_Polyfills_Console_log(duk_context *ctx)