/* Functions used by cgen output */

#include "Python.h"
#include "cgensupport.h"


/* Functions to extract arguments.
   These needs to know the total number of arguments supplied,
   since the argument list is a tuple only of there is more than
   one argument. */

int
PyArg_GetObject(register PyObject *args, int nargs, int i, PyObject **p_arg)
{
    if (nargs != 1) {
        if (args == NULL || !PyTuple_Check(args) ||
                        nargs != PyTuple_Size(args) ||
                        i < 0 || i >= nargs) {
            return PyErr_BadArgument();
        }
        else {
            args = PyTuple_GetItem(args, i);
        }
    }
    if (args == NULL) {
        return PyErr_BadArgument();
    }
    *p_arg = args;
    return 1;
}

int
PyArg_GetLong(register PyObject *args, int nargs, int i, long *p_arg)
{
    if (nargs != 1) {
        if (args == NULL || !PyTuple_Check(args) ||
                        nargs != PyTuple_Size(args) ||
                        i < 0 || i >= nargs) {
            return PyErr_BadArgument();
        }
        args = PyTuple_GetItem(args, i);
    }
    if (args == NULL || !PyInt_Check(args)) {
        return PyErr_BadArgument();
    }
    *p_arg = PyInt_AsLong(args);
    return 1;
}

int
PyArg_GetShort(register PyObject *args, int nargs, int i, short *p_arg)
{
    long x;
    if (!PyArg_GetLong(args, nargs, i, &x))
        return 0;
    *p_arg = (short) x;
    return 1;
}

static int
extractdouble(register PyObject *v, double *p_arg)
{
    if (v == NULL) {
        /* Fall through to error return at end of function */
    }
    else if (PyFloat_Check(v)) {
        *p_arg = PyFloat_AS_DOUBLE((PyFloatObject *)v);
        return 1;
    }
    else if (PyInt_Check(v)) {
        *p_arg = PyInt_AS_LONG((PyIntObject *)v);
        return 1;
    }
    else if (PyLong_Check(v)) {
        *p_arg = PyLong_AsDouble(v);
        return 1;
    }
    return PyErr_BadArgument();
}

static int
extractfloat(register PyObject *v, float *p_arg)
{
    if (v == NULL) {
        /* Fall through to error return at end of function */
    }
    else if (PyFloat_Check(v)) {
        *p_arg = (float) PyFloat_AS_DOUBLE((PyFloatObject *)v);
        return 1;
    }
    else if (PyInt_Check(v)) {
        *p_arg = (float) PyInt_AS_LONG((PyIntObject *)v);
        return 1;
    }
    else if (PyLong_Check(v)) {
        *p_arg = (float) PyLong_AsDouble(v);
        return 1;
    }
    return PyErr_BadArgument();
}

int
PyArg_GetFloat(register PyObject *args, int nargs, int i, float *p_arg)
{
    PyObject *v;
    float x;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (!extractfloat(v, &x))
        return 0;
    *p_arg = x;
    return 1;
}

int
PyArg_GetString(PyObject *args, int nargs, int i, string *p_arg)
{
    PyObject *v;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (!PyString_Check(v)) {
        return PyErr_BadArgument();
    }
    *p_arg = PyString_AsString(v);
    return 1;
}

int
PyArg_GetChar(PyObject *args, int nargs, int i, char *p_arg)
{
    string x;
    if (!PyArg_GetString(args, nargs, i, &x))
        return 0;
    if (x[0] == '\0' || x[1] != '\0') {
        /* Not exactly one char */
        return PyErr_BadArgument();
    }
    *p_arg = x[0];
    return 1;
}

int
PyArg_GetLongArraySize(PyObject *args, int nargs, int i, long *p_arg)
{
    PyObject *v;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (PyTuple_Check(v)) {
        *p_arg = PyTuple_Size(v);
        return 1;
    }
    if (PyList_Check(v)) {
        *p_arg = PyList_Size(v);
        return 1;
    }
    return PyErr_BadArgument();
}

int
PyArg_GetShortArraySize(PyObject *args, int nargs, int i, short *p_arg)
{
    long x;
    if (!PyArg_GetLongArraySize(args, nargs, i, &x))
        return 0;
    *p_arg = (short) x;
    return 1;
}

/* XXX The following four are too similar.  Should share more code. */

int
PyArg_GetLongArray(PyObject *args, int nargs, int i, int n, long *p_arg)
{
    PyObject *v, *w;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (PyTuple_Check(v)) {
        if (PyTuple_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyTuple_GetItem(v, i);
            if (!PyInt_Check(w)) {
                return PyErr_BadArgument();
            }
            p_arg[i] = PyInt_AsLong(w);
        }
        return 1;
    }
    else if (PyList_Check(v)) {
        if (PyList_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyList_GetItem(v, i);
            if (!PyInt_Check(w)) {
                return PyErr_BadArgument();
            }
            p_arg[i] = PyInt_AsLong(w);
        }
        return 1;
    }
    else {
        return PyErr_BadArgument();
    }
}

int
PyArg_GetShortArray(PyObject *args, int nargs, int i, int n, short *p_arg)
{
    PyObject *v, *w;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (PyTuple_Check(v)) {
        if (PyTuple_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyTuple_GetItem(v, i);
            if (!PyInt_Check(w)) {
                return PyErr_BadArgument();
            }
            p_arg[i] = (short) PyInt_AsLong(w);
        }
        return 1;
    }
    else if (PyList_Check(v)) {
        if (PyList_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyList_GetItem(v, i);
            if (!PyInt_Check(w)) {
                return PyErr_BadArgument();
            }
            p_arg[i] = (short) PyInt_AsLong(w);
        }
        return 1;
    }
    else {
        return PyErr_BadArgument();
    }
}

int
PyArg_GetDoubleArray(PyObject *args, int nargs, int i, int n, double *p_arg)
{
    PyObject *v, *w;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (PyTuple_Check(v)) {
        if (PyTuple_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyTuple_GetItem(v, i);
            if (!extractdouble(w, &p_arg[i]))
                return 0;
        }
        return 1;
    }
    else if (PyList_Check(v)) {
        if (PyList_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyList_GetItem(v, i);
            if (!extractdouble(w, &p_arg[i]))
                return 0;
        }
        return 1;
    }
    else {
        return PyErr_BadArgument();
    }
}

int
PyArg_GetFloatArray(PyObject *args, int nargs, int i, int n, float *p_arg)
{
    PyObject *v, *w;
    if (!PyArg_GetObject(args, nargs, i, &v))
        return 0;
    if (PyTuple_Check(v)) {
        if (PyTuple_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyTuple_GetItem(v, i);
            if (!extractfloat(w, &p_arg[i]))
                return 0;
        }
        return 1;
    }
    else if (PyList_Check(v)) {
        if (PyList_Size(v) != n) {
            return PyErr_BadArgument();
        }
        for (i = 0; i < n; i++) {
            w = PyList_GetItem(v, i);
            if (!extractfloat(w, &p_arg[i]))
                return 0;
        }
        return 1;
    }
    else {
        return PyErr_BadArgument();
    }
}