orca/ext/wasm3/platforms/android/override.txt

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2023-04-12 14:21:03 +00:00
/*
* Override printf, puts, putchar
*/
JNIEnv* jniEnv;
void callOutputText(const char* text) {
JNIEnv *env = jniEnv;
jstring javaMsg = (*env)->NewStringUTF(env, text);
(*env)->CallVoidMethod(env, activityObj, outputTextId, javaMsg);
(*env)->DeleteLocalRef(env, javaMsg);
}
int printf(const char * format, ... )
{
char buff[256] = {};
va_list args;
va_start (args, format);
const int result = vsnprintf(buff, sizeof(buff), format, args);
va_end (args);
if (result > 0) {
callOutputText(buff);
}
return result;
}
int puts(const char *s)
{
callOutputText(s);
callOutputText("\n");
return strlen(s);
}
int putchar(int c)
{
char buff[2] = { c, '\0' };
callOutputText(buff);
return c;
}