1081 lines
23 KiB
C
1081 lines
23 KiB
C
/***********************************************************
|
|
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
|
|
The Netherlands.
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
|
|
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
/* New getargs implementation */
|
|
|
|
/* XXX There are several unchecked sprintf or strcat calls in this file.
|
|
XXX The only way these can become a danger is if some C code in the
|
|
XXX Python source (or in an extension) uses ridiculously long names
|
|
XXX or riduculously deep nesting in format strings. */
|
|
|
|
#include "Python.h"
|
|
|
|
#include <ctype.h>
|
|
|
|
|
|
int PyArg_Parse Py_PROTO((PyObject *, char *, ...));
|
|
int PyArg_ParseTuple Py_PROTO((PyObject *, char *, ...));
|
|
int PyArg_VaParse Py_PROTO((PyObject *, char *, va_list));
|
|
|
|
int PyArg_ParseTupleAndKeywords Py_PROTO((PyObject *, PyObject *,
|
|
char *, char **, ...));
|
|
|
|
/* Forward */
|
|
static int vgetargs1 Py_PROTO((PyObject *, char *, va_list *, int));
|
|
static void seterror Py_PROTO((int, char *, int *, char *, char *));
|
|
static char *convertitem Py_PROTO((PyObject *, char **, va_list *,
|
|
int *, char *));
|
|
static char *converttuple Py_PROTO((PyObject *, char **, va_list *,
|
|
int *, char *, int));
|
|
static char *convertsimple Py_PROTO((PyObject *, char **, va_list *, char *));
|
|
static char *convertsimple1 Py_PROTO((PyObject *, char **, va_list *));
|
|
|
|
static int vgetargskeywords Py_PROTO((PyObject *, PyObject *,
|
|
char *, char **, va_list *));
|
|
static char *skipitem Py_PROTO((char **, va_list *));
|
|
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
/* VARARGS2 */
|
|
int PyArg_Parse(PyObject *args, char *format, ...)
|
|
#else
|
|
/* VARARGS */
|
|
int PyArg_Parse(va_alist) va_dcl
|
|
#endif
|
|
{
|
|
int retval;
|
|
va_list va;
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
|
|
va_start(va, format);
|
|
#else
|
|
PyObject *args;
|
|
char *format;
|
|
|
|
va_start(va);
|
|
args = va_arg(va, PyObject *);
|
|
format = va_arg(va, char *);
|
|
#endif
|
|
retval = vgetargs1(args, format, &va, 1);
|
|
va_end(va);
|
|
return retval;
|
|
}
|
|
|
|
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
/* VARARGS2 */
|
|
int PyArg_ParseTuple(PyObject *args, char *format, ...)
|
|
#else
|
|
/* VARARGS */
|
|
int PyArg_ParseTuple(va_alist) va_dcl
|
|
#endif
|
|
{
|
|
int retval;
|
|
va_list va;
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
|
|
va_start(va, format);
|
|
#else
|
|
PyObject *args;
|
|
char *format;
|
|
|
|
va_start(va);
|
|
args = va_arg(va, PyObject *);
|
|
format = va_arg(va, char *);
|
|
#endif
|
|
retval = vgetargs1(args, format, &va, 0);
|
|
va_end(va);
|
|
return retval;
|
|
}
|
|
|
|
|
|
int
|
|
PyArg_VaParse(args, format, va)
|
|
PyObject *args;
|
|
char *format;
|
|
va_list va;
|
|
{
|
|
va_list lva;
|
|
|
|
#ifdef VA_LIST_IS_ARRAY
|
|
memcpy(lva, va, sizeof(va_list));
|
|
#else
|
|
lva = va;
|
|
#endif
|
|
|
|
return vgetargs1(args, format, &lva, 0);
|
|
}
|
|
|
|
|
|
static int
|
|
vgetargs1(args, format, p_va, compat)
|
|
PyObject *args;
|
|
char *format;
|
|
va_list *p_va;
|
|
int compat;
|
|
{
|
|
char msgbuf[256];
|
|
int levels[32];
|
|
char *fname = NULL;
|
|
char *message = NULL;
|
|
int min = -1;
|
|
int max = 0;
|
|
int level = 0;
|
|
char *formatsave = format;
|
|
int i, len;
|
|
char *msg;
|
|
|
|
for (;;) {
|
|
int c = *format++;
|
|
if (c == '(' /* ')' */) {
|
|
if (level == 0)
|
|
max++;
|
|
level++;
|
|
}
|
|
else if (/* '(' */ c == ')') {
|
|
if (level == 0)
|
|
Py_FatalError(/* '(' */
|
|
"excess ')' in getargs format");
|
|
else
|
|
level--;
|
|
}
|
|
else if (c == '\0')
|
|
break;
|
|
else if (c == ':') {
|
|
fname = format;
|
|
break;
|
|
}
|
|
else if (c == ';') {
|
|
message = format;
|
|
break;
|
|
}
|
|
else if (level != 0)
|
|
; /* Pass */
|
|
else if (isalpha(c))
|
|
max++;
|
|
else if (c == '|')
|
|
min = max;
|
|
}
|
|
|
|
if (level != 0)
|
|
Py_FatalError(/* '(' */ "missing ')' in getargs format");
|
|
|
|
if (min < 0)
|
|
min = max;
|
|
|
|
format = formatsave;
|
|
|
|
if (compat) {
|
|
if (max == 0) {
|
|
if (args == NULL)
|
|
return 1;
|
|
sprintf(msgbuf, "%s requires no arguments",
|
|
fname==NULL ? "function" : fname);
|
|
PyErr_SetString(PyExc_TypeError, msgbuf);
|
|
return 0;
|
|
}
|
|
else if (min == 1 && max == 1) {
|
|
if (args == NULL) {
|
|
sprintf(msgbuf,
|
|
"%s requires at least one argument",
|
|
fname==NULL ? "function" : fname);
|
|
PyErr_SetString(PyExc_TypeError, msgbuf);
|
|
return 0;
|
|
}
|
|
msg = convertitem(args, &format, p_va, levels, msgbuf);
|
|
if (msg == NULL)
|
|
return 1;
|
|
seterror(levels[0], msg, levels+1, fname, message);
|
|
return 0;
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"old style getargs format uses new features");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!PyTuple_Check(args)) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"new style getargs format but argument is not a tuple");
|
|
return 0;
|
|
}
|
|
|
|
len = PyTuple_Size(args);
|
|
|
|
if (len < min || max < len) {
|
|
if (message == NULL) {
|
|
sprintf(msgbuf,
|
|
"%s requires %s %d argument%s; %d given",
|
|
fname==NULL ? "function" : fname,
|
|
min==max ? "exactly"
|
|
: len < min ? "at least" : "at most",
|
|
len < min ? min : max,
|
|
(len < min ? min : max) == 1 ? "" : "s",
|
|
len);
|
|
message = msgbuf;
|
|
}
|
|
PyErr_SetString(PyExc_TypeError, message);
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < len; i++) {
|
|
if (*format == '|')
|
|
format++;
|
|
msg = convertitem(PyTuple_GetItem(args, i), &format, p_va,
|
|
levels, msgbuf);
|
|
if (msg) {
|
|
seterror(i+1, msg, levels, fname, message);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (*format != '\0' && !isalpha((int)(*format)) &&
|
|
*format != '(' &&
|
|
*format != '|' && *format != ':' && *format != ';') {
|
|
PyErr_Format(PyExc_SystemError,
|
|
"bad format string: %.200s", formatsave);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
seterror(iarg, msg, levels, fname, message)
|
|
int iarg;
|
|
char *msg;
|
|
int *levels;
|
|
char *fname;
|
|
char *message;
|
|
{
|
|
char buf[256];
|
|
int i;
|
|
char *p = buf;
|
|
|
|
if (PyErr_Occurred())
|
|
return;
|
|
if (iarg == 0 && message == NULL)
|
|
message = msg;
|
|
else if (message == NULL) {
|
|
if (fname != NULL) {
|
|
sprintf(p, "%s, ", fname);
|
|
p += strlen(p);
|
|
}
|
|
sprintf(p, "argument %d", iarg);
|
|
i = 0;
|
|
p += strlen(p);
|
|
while (levels[i] > 0) {
|
|
sprintf(p, ", item %d", levels[i]-1);
|
|
p += strlen(p);
|
|
i++;
|
|
}
|
|
sprintf(p, ": expected %s found", msg);
|
|
message = buf;
|
|
}
|
|
PyErr_SetString(PyExc_TypeError, message);
|
|
}
|
|
|
|
|
|
/* Convert a tuple argument.
|
|
On entry, *p_format points to the character _after_ the opening '('.
|
|
On successful exit, *p_format points to the closing ')'.
|
|
If successful:
|
|
*p_format and *p_va are updated,
|
|
*levels and *msgbuf are untouched,
|
|
and NULL is returned.
|
|
If the argument is invalid:
|
|
*p_format is unchanged,
|
|
*p_va is undefined,
|
|
*levels is a 0-terminated list of item numbers,
|
|
*msgbuf contains an error message, whose format is:
|
|
"<typename1>, <typename2>", where:
|
|
<typename1> is the name of the expected type, and
|
|
<typename2> is the name of the actual type,
|
|
(so you can surround it by "expected ... found"),
|
|
and msgbuf is returned.
|
|
*/
|
|
|
|
static char *
|
|
converttuple(arg, p_format, p_va, levels, msgbuf, toplevel)
|
|
PyObject *arg;
|
|
char **p_format;
|
|
va_list *p_va;
|
|
int *levels;
|
|
char *msgbuf;
|
|
int toplevel;
|
|
{
|
|
int level = 0;
|
|
int n = 0;
|
|
char *format = *p_format;
|
|
int i;
|
|
|
|
for (;;) {
|
|
int c = *format++;
|
|
if (c == '(') {
|
|
if (level == 0)
|
|
n++;
|
|
level++;
|
|
}
|
|
else if (c == ')') {
|
|
if (level == 0)
|
|
break;
|
|
level--;
|
|
}
|
|
else if (c == ':' || c == ';' || c == '\0')
|
|
break;
|
|
else if (level == 0 && isalpha(c))
|
|
n++;
|
|
}
|
|
|
|
if (!PyTuple_Check(arg)) {
|
|
levels[0] = 0;
|
|
sprintf(msgbuf,
|
|
toplevel ? "%d arguments, %s" : "%d-tuple, %s",
|
|
n, arg == Py_None ? "None" : arg->ob_type->tp_name);
|
|
return msgbuf;
|
|
}
|
|
|
|
if ((i = PyTuple_Size(arg)) != n) {
|
|
levels[0] = 0;
|
|
sprintf(msgbuf,
|
|
toplevel ? "%d arguments, %d" : "%d-tuple, %d-tuple",
|
|
n, i);
|
|
return msgbuf;
|
|
}
|
|
|
|
format = *p_format;
|
|
for (i = 0; i < n; i++) {
|
|
char *msg;
|
|
msg = convertitem(PyTuple_GetItem(arg, i), &format, p_va,
|
|
levels+1, msgbuf);
|
|
if (msg != NULL) {
|
|
levels[0] = i+1;
|
|
return msg;
|
|
}
|
|
}
|
|
|
|
*p_format = format;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Convert a single item. */
|
|
|
|
static char *
|
|
convertitem(arg, p_format, p_va, levels, msgbuf)
|
|
PyObject *arg;
|
|
char **p_format;
|
|
va_list *p_va;
|
|
int *levels;
|
|
char *msgbuf;
|
|
{
|
|
char *msg;
|
|
char *format = *p_format;
|
|
|
|
if (*format == '(' /* ')' */) {
|
|
format++;
|
|
msg = converttuple(arg, &format, p_va, levels, msgbuf, 0);
|
|
if (msg == NULL)
|
|
format++;
|
|
}
|
|
else {
|
|
msg = convertsimple(arg, &format, p_va, msgbuf);
|
|
if (msg != NULL)
|
|
levels[0] = 0;
|
|
}
|
|
if (msg == NULL)
|
|
*p_format = format;
|
|
return msg;
|
|
}
|
|
|
|
|
|
/* Convert a non-tuple argument. Adds to convertsimple1 functionality
|
|
by appending ", <actual argument type>" to error message. */
|
|
|
|
static char *
|
|
convertsimple(arg, p_format, p_va, msgbuf)
|
|
PyObject *arg;
|
|
char **p_format;
|
|
va_list *p_va;
|
|
char *msgbuf;
|
|
{
|
|
char *msg = convertsimple1(arg, p_format, p_va);
|
|
if (msg != NULL) {
|
|
sprintf(msgbuf, "%.50s, %.50s", msg,
|
|
arg == Py_None ? "None" : arg->ob_type->tp_name);
|
|
msg = msgbuf;
|
|
}
|
|
return msg;
|
|
}
|
|
|
|
|
|
/* Convert a non-tuple argument. Return NULL if conversion went OK,
|
|
or a string representing the expected type if the conversion failed.
|
|
When failing, an exception may or may not have been raised.
|
|
Don't call if a tuple is expected. */
|
|
|
|
static char *
|
|
convertsimple1(arg, p_format, p_va)
|
|
PyObject *arg;
|
|
char **p_format;
|
|
va_list *p_va;
|
|
{
|
|
char *format = *p_format;
|
|
char c = *format++;
|
|
|
|
switch (c) {
|
|
|
|
case 'b': /* byte -- very short int */
|
|
{
|
|
char *p = va_arg(*p_va, char *);
|
|
long ival = PyInt_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return "integer<b>";
|
|
else
|
|
*p = (char) ival;
|
|
break;
|
|
}
|
|
|
|
case 'h': /* short int */
|
|
{
|
|
short *p = va_arg(*p_va, short *);
|
|
long ival = PyInt_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return "integer<h>";
|
|
else
|
|
*p = (short) ival;
|
|
break;
|
|
}
|
|
|
|
case 'i': /* int */
|
|
{
|
|
int *p = va_arg(*p_va, int *);
|
|
long ival = PyInt_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return "integer<i>";
|
|
else
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
case 'l': /* long int */
|
|
{
|
|
long *p = va_arg(*p_va, long *);
|
|
long ival = PyInt_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return "integer<l>";
|
|
else
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
case 'f': /* float */
|
|
{
|
|
float *p = va_arg(*p_va, float *);
|
|
double dval = PyFloat_AsDouble(arg);
|
|
if (PyErr_Occurred())
|
|
return "float<f>";
|
|
else
|
|
*p = (float) dval;
|
|
break;
|
|
}
|
|
|
|
case 'd': /* double */
|
|
{
|
|
double *p = va_arg(*p_va, double *);
|
|
double dval = PyFloat_AsDouble(arg);
|
|
if (PyErr_Occurred())
|
|
return "float<d>";
|
|
else
|
|
*p = dval;
|
|
break;
|
|
}
|
|
|
|
#ifndef WITHOUT_COMPLEX
|
|
case 'D': /* complex double */
|
|
{
|
|
Py_complex *p = va_arg(*p_va, Py_complex *);
|
|
Py_complex cval;
|
|
cval = PyComplex_AsCComplex(arg);
|
|
if (PyErr_Occurred())
|
|
return "complex<D>";
|
|
else
|
|
*p = cval;
|
|
break;
|
|
}
|
|
#endif /* WITHOUT_COMPLEX */
|
|
|
|
case 'c': /* char */
|
|
{
|
|
char *p = va_arg(*p_va, char *);
|
|
if (PyString_Check(arg) && PyString_Size(arg) == 1)
|
|
*p = PyString_AsString(arg)[0];
|
|
else
|
|
return "char";
|
|
break;
|
|
}
|
|
|
|
case 's': /* string */
|
|
{
|
|
if (*format == '#') { /* any buffer-like object */
|
|
void **p = (void **)va_arg(*p_va, char **);
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
int *q = va_arg(*p_va, int *);
|
|
int count;
|
|
|
|
if ( pb == NULL ||
|
|
pb->bf_getreadbuffer == NULL ||
|
|
pb->bf_getsegcount == NULL )
|
|
return "read-only buffer";
|
|
if ( (*pb->bf_getsegcount)(arg, NULL) != 1 )
|
|
return "single-segment read-only buffer";
|
|
if ( (count =
|
|
(*pb->bf_getreadbuffer)(arg, 0, p)) < 0 )
|
|
return "(unspecified)";
|
|
*q = count;
|
|
format++;
|
|
} else {
|
|
char **p = va_arg(*p_va, char **);
|
|
|
|
if (PyString_Check(arg))
|
|
*p = PyString_AsString(arg);
|
|
else
|
|
return "string";
|
|
if ((int)strlen(*p) != PyString_Size(arg))
|
|
return "string without null bytes";
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'z': /* string, may be NULL (None) */
|
|
{
|
|
if (*format == '#') { /* any buffer-like object */
|
|
void **p = (void **)va_arg(*p_va, char **);
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
int *q = va_arg(*p_va, int *);
|
|
int count;
|
|
|
|
if (arg == Py_None) {
|
|
*p = 0;
|
|
*q = 0;
|
|
} else {
|
|
if ( pb == NULL ||
|
|
pb->bf_getreadbuffer == NULL ||
|
|
pb->bf_getsegcount == NULL )
|
|
return "read-only buffer";
|
|
if ( (*pb->bf_getsegcount)(arg, NULL) != 1 )
|
|
return "single-segment read-only buffer";
|
|
if ( (count = (*pb->bf_getreadbuffer)
|
|
(arg, 0, p)) < 0 )
|
|
return "(unspecified)";
|
|
*q = count;
|
|
}
|
|
format++;
|
|
} else {
|
|
char **p = va_arg(*p_va, char **);
|
|
|
|
if (arg == Py_None)
|
|
*p = 0;
|
|
else if (PyString_Check(arg))
|
|
*p = PyString_AsString(arg);
|
|
else
|
|
return "None or string";
|
|
if (*format == '#') {
|
|
int *q = va_arg(*p_va, int *);
|
|
if (arg == Py_None)
|
|
*q = 0;
|
|
else
|
|
*q = PyString_Size(arg);
|
|
format++;
|
|
}
|
|
else if (*p != NULL &&
|
|
(int)strlen(*p) != PyString_Size(arg))
|
|
return "None or string without null bytes";
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'S': /* string object */
|
|
{
|
|
PyObject **p = va_arg(*p_va, PyObject **);
|
|
if (PyString_Check(arg))
|
|
*p = arg;
|
|
else
|
|
return "string";
|
|
break;
|
|
}
|
|
|
|
case 'O': /* object */
|
|
{
|
|
PyTypeObject *type;
|
|
PyObject **p;
|
|
if (*format == '!') {
|
|
type = va_arg(*p_va, PyTypeObject*);
|
|
p = va_arg(*p_va, PyObject **);
|
|
format++;
|
|
if (arg->ob_type == type)
|
|
*p = arg;
|
|
else
|
|
return type->tp_name;
|
|
|
|
}
|
|
else if (*format == '?') {
|
|
inquiry pred = va_arg(*p_va, inquiry);
|
|
p = va_arg(*p_va, PyObject **);
|
|
format++;
|
|
if ((*pred)(arg))
|
|
*p = arg;
|
|
else
|
|
return "(unspecified)";
|
|
|
|
}
|
|
else if (*format == '&') {
|
|
typedef int (*converter)
|
|
Py_PROTO((PyObject *, void *));
|
|
converter convert = va_arg(*p_va, converter);
|
|
void *addr = va_arg(*p_va, void *);
|
|
format++;
|
|
if (! (*convert)(arg, addr))
|
|
return "(unspecified)";
|
|
}
|
|
else {
|
|
p = va_arg(*p_va, PyObject **);
|
|
*p = arg;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
case 'w': /* memory buffer, read-write access */
|
|
{
|
|
void **p = va_arg(*p_va, void **);
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
int count;
|
|
|
|
if ( pb == NULL || pb->bf_getwritebuffer == NULL ||
|
|
pb->bf_getsegcount == NULL )
|
|
return "read-write buffer";
|
|
if ( (*pb->bf_getsegcount)(arg, NULL) != 1 )
|
|
return "single-segment read-write buffer";
|
|
if ( (count = pb->bf_getwritebuffer(arg, 0, p)) < 0 )
|
|
return "(unspecified)";
|
|
if (*format == '#') {
|
|
int *q = va_arg(*p_va, int *);
|
|
|
|
*q = count;
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
default:
|
|
return "impossible<bad format char>";
|
|
|
|
}
|
|
|
|
*p_format = format;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Support for keyword arguments donated by
|
|
Geoff Philbrick <philbric@delphi.hks.com> */
|
|
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
/* VARARGS2 */
|
|
int PyArg_ParseTupleAndKeywords(PyObject *args,
|
|
PyObject *keywords,
|
|
char *format,
|
|
char **kwlist, ...)
|
|
#else
|
|
/* VARARGS */
|
|
int PyArg_ParseTupleAndKeywords(va_alist) va_dcl
|
|
#endif
|
|
{
|
|
int retval;
|
|
va_list va;
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
|
|
va_start(va, kwlist);
|
|
#else
|
|
PyObject *args;
|
|
PyObject *keywords;
|
|
char *format;
|
|
char **kwlist;
|
|
|
|
va_start(va);
|
|
args = va_arg(va, PyObject *);
|
|
keywords = va_arg(va, PyObject *);
|
|
format = va_arg(va, char *);
|
|
kwlist = va_arg(va, char **);
|
|
#endif
|
|
retval = vgetargskeywords(args, keywords, format, kwlist, &va);
|
|
va_end(va);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static int
|
|
vgetargskeywords(args, keywords, format, kwlist, p_va)
|
|
PyObject *args;
|
|
PyObject *keywords;
|
|
char *format;
|
|
char **kwlist;
|
|
va_list *p_va;
|
|
{
|
|
char msgbuf[256];
|
|
int levels[32];
|
|
char *fname = NULL;
|
|
char *message = NULL;
|
|
int min = -1;
|
|
int max = 0;
|
|
char *formatsave = format;
|
|
int i, len, tplen, kwlen;
|
|
char *msg, *ks, **p;
|
|
int nkwds, pos, match, converted;
|
|
PyObject *key, *value;
|
|
|
|
/* nested tuples cannot be parsed when using keyword arguments */
|
|
|
|
for (;;) {
|
|
int c = *format++;
|
|
if (c == '(') {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"tuple found in format when using keyword arguments");
|
|
return 0;
|
|
}
|
|
else if (c == '\0')
|
|
break;
|
|
else if (c == ':') {
|
|
fname = format;
|
|
break;
|
|
}
|
|
else if (c == ';') {
|
|
message = format;
|
|
break;
|
|
}
|
|
else if (isalpha(c))
|
|
max++;
|
|
else if (c == '|')
|
|
min = max;
|
|
}
|
|
|
|
if (min < 0)
|
|
min = max;
|
|
|
|
format = formatsave;
|
|
|
|
if (!PyTuple_Check(args)) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"new style getargs format but argument is not a tuple");
|
|
return 0;
|
|
}
|
|
|
|
tplen = PyTuple_Size(args);
|
|
|
|
/* do a cursory check of the keywords just to see how many we got */
|
|
|
|
if (keywords) {
|
|
if (!PyDict_Check(keywords)) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"non-dictionary object received when keyword dictionary expected");
|
|
return 0;
|
|
}
|
|
kwlen = PyDict_Size(keywords);
|
|
}
|
|
else {
|
|
kwlen = 0;
|
|
}
|
|
|
|
/* make sure there are no duplicate values for an argument;
|
|
its not clear when to use the term "keyword argument vs.
|
|
keyword parameter in messages */
|
|
|
|
if (keywords) {
|
|
for (i = 0; i < tplen; i++) {
|
|
if (PyMapping_HasKeyString(keywords, kwlist[i])) {
|
|
sprintf(msgbuf,
|
|
"keyword parameter %s redefined",
|
|
kwlist[i]);
|
|
PyErr_SetString(PyExc_TypeError, msgbuf);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
PyErr_Clear(); /* I'm not which Py functions set the error string */
|
|
|
|
/* required arguments missing from args can be supplied by keyword
|
|
arguments */
|
|
|
|
len = tplen;
|
|
if (keywords && tplen < min) {
|
|
for (i = tplen; i < min; i++) {
|
|
if (PyMapping_HasKeyString(keywords, kwlist[i])) {
|
|
len++;
|
|
}
|
|
}
|
|
}
|
|
PyErr_Clear();
|
|
|
|
/* make sure we got an acceptable number of arguments; the message
|
|
is a little confusing with keywords since keyword arguments
|
|
which are supplied, but don't match the required arguments
|
|
are not included in the "%d given" part of the message */
|
|
|
|
if (len < min || max < len) {
|
|
if (message == NULL) {
|
|
sprintf(msgbuf,
|
|
"%s requires %s %d argument%s; %d given",
|
|
fname==NULL ? "function" : fname,
|
|
min==max ? "exactly"
|
|
: len < min ? "at least" : "at most",
|
|
len < min ? min : max,
|
|
(len < min ? min : max) == 1 ? "" : "s",
|
|
len);
|
|
message = msgbuf;
|
|
}
|
|
PyErr_SetString(PyExc_TypeError, message);
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < tplen; i++) {
|
|
if (*format == '|')
|
|
format++;
|
|
msg = convertitem(PyTuple_GetItem(args, i), &format, p_va,
|
|
levels, msgbuf);
|
|
if (msg) {
|
|
seterror(i+1, msg, levels, fname, message);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* handle no keyword parameters in call */
|
|
|
|
if (!keywords) return 1;
|
|
|
|
/* make sure the number of keywords in the keyword list matches the
|
|
number of items in the format string */
|
|
|
|
nkwds = 0;
|
|
p = kwlist;
|
|
for (;;) {
|
|
if (!*(p++)) break;
|
|
nkwds++;
|
|
}
|
|
|
|
if (nkwds != max) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"number of items in format string and keyword list do not match");
|
|
return 0;
|
|
}
|
|
|
|
/* convert the keyword arguments; this uses the format
|
|
string where it was left after processing args */
|
|
|
|
converted = 0;
|
|
for (i = tplen; i < nkwds; i++) {
|
|
PyObject *item;
|
|
if (*format == '|')
|
|
format++;
|
|
item = PyMapping_GetItemString(keywords, kwlist[i]);
|
|
if (item != NULL) {
|
|
msg = convertitem(item, &format, p_va, levels, msgbuf);
|
|
if (msg) {
|
|
seterror(i+1, msg, levels, fname, message);
|
|
return 0;
|
|
}
|
|
converted++;
|
|
}
|
|
else {
|
|
PyErr_Clear();
|
|
msg = skipitem(&format, p_va);
|
|
if (msg) {
|
|
seterror(i+1, msg, levels, fname, message);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* make sure there are no extraneous keyword arguments */
|
|
|
|
pos = 0;
|
|
if (converted < kwlen) {
|
|
while (PyDict_Next(keywords, &pos, &key, &value)) {
|
|
match = 0;
|
|
ks = PyString_AsString(key);
|
|
for (i = 0; i < nkwds; i++) {
|
|
if (!strcmp(ks, kwlist[i])) {
|
|
match = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!match) {
|
|
sprintf(msgbuf,
|
|
"%s is an invalid keyword argument for this function",
|
|
ks);
|
|
PyErr_SetString(PyExc_TypeError, msgbuf);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static char *
|
|
skipitem(p_format, p_va)
|
|
char **p_format;
|
|
va_list *p_va;
|
|
{
|
|
char *format = *p_format;
|
|
char c = *format++;
|
|
|
|
switch (c) {
|
|
|
|
case 'b': /* byte -- very short int */
|
|
{
|
|
(void) va_arg(*p_va, char *);
|
|
break;
|
|
}
|
|
|
|
case 'h': /* short int */
|
|
{
|
|
(void) va_arg(*p_va, short *);
|
|
break;
|
|
}
|
|
|
|
case 'i': /* int */
|
|
{
|
|
(void) va_arg(*p_va, int *);
|
|
break;
|
|
}
|
|
|
|
case 'l': /* long int */
|
|
{
|
|
(void) va_arg(*p_va, long *);
|
|
break;
|
|
}
|
|
|
|
case 'f': /* float */
|
|
{
|
|
(void) va_arg(*p_va, float *);
|
|
break;
|
|
}
|
|
|
|
case 'd': /* double */
|
|
{
|
|
(void) va_arg(*p_va, double *);
|
|
break;
|
|
}
|
|
|
|
#ifndef WITHOUT_COMPLEX
|
|
case 'D': /* complex double */
|
|
{
|
|
(void) va_arg(*p_va, Py_complex *);
|
|
break;
|
|
}
|
|
#endif /* WITHOUT_COMPLEX */
|
|
|
|
case 'c': /* char */
|
|
{
|
|
(void) va_arg(*p_va, char *);
|
|
break;
|
|
}
|
|
|
|
case 's': /* string */
|
|
{
|
|
(void) va_arg(*p_va, char **);
|
|
if (*format == '#') {
|
|
(void) va_arg(*p_va, int *);
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'z': /* string */
|
|
{
|
|
(void) va_arg(*p_va, char **);
|
|
if (*format == '#') {
|
|
(void) va_arg(*p_va, int *);
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'S': /* string object */
|
|
{
|
|
(void) va_arg(*p_va, PyObject **);
|
|
break;
|
|
}
|
|
|
|
case 'O': /* object */
|
|
{
|
|
if (*format == '!') {
|
|
format++;
|
|
(void) va_arg(*p_va, PyTypeObject*);
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
#if 0
|
|
/* I don't know what this is for */
|
|
else if (*format == '?') {
|
|
inquiry pred = va_arg(*p_va, inquiry);
|
|
format++;
|
|
if ((*pred)(arg)) {
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
}
|
|
#endif
|
|
else if (*format == '&') {
|
|
typedef int (*converter)
|
|
Py_PROTO((PyObject *, void *));
|
|
(void) va_arg(*p_va, converter);
|
|
(void) va_arg(*p_va, void *);
|
|
format++;
|
|
}
|
|
else {
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return "impossible<bad format char>";
|
|
|
|
}
|
|
|
|
*p_format = format;
|
|
return NULL;
|
|
}
|