From 81fece2d632fffa047824c6d52c2eb4b410e8c89 Mon Sep 17 00:00:00 2001
From: Mark Dickinson <dickinsm@gmail.com>
Date: Tue, 11 May 2010 13:34:35 +0000
Subject: Issue #8657:  Make the audioop module PY_SSIZE_T_CLEAN.

---
 Misc/NEWS         |   3 ++
 Modules/audioop.c | 134 ++++++++++++++++++++++++++++--------------------------
 2 files changed, 73 insertions(+), 64 deletions(-)

diff --git a/Misc/NEWS b/Misc/NEWS
index 64cbf3c..cd1ed07 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -351,6 +351,9 @@ C-API
 Library
 -------
 
+- The audioop module now supports sound fragments of length greater
+  than 2**31 bytes on 64-bit machines, and is PY_SSIZE_T_CLEAN.
+
 - Issue #4972: Add support for the context manager protocol to the ftplib.FTP
   class.
 
diff --git a/Modules/audioop.c b/Modules/audioop.c
index 07b41d4..7da0462 100644
--- a/Modules/audioop.c
+++ b/Modules/audioop.c
@@ -1,6 +1,8 @@
 
 /* audioopmodule - Module to detect peak values in arrays */
 
+#define PY_SSIZE_T_CLEAN
+
 #include "Python.h"
 
 #if SIZEOF_INT == 4
@@ -299,10 +301,10 @@ static PyObject *
 audioop_getsample(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
+    Py_ssize_t len, i;
+    int size, val = 0;
 
-    if ( !PyArg_ParseTuple(args, "s#ii:getsample", &cp, &len, &size, &i) )
+    if ( !PyArg_ParseTuple(args, "s#in:getsample", &cp, &len, &size, &i) )
         return 0;
     if ( size != 1 && size != 2 && size != 4 ) {
         PyErr_SetString(AudioopError, "Size should be 1, 2 or 4");
@@ -322,8 +324,8 @@ static PyObject *
 audioop_max(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
+    Py_ssize_t len, i;
+    int size, val = 0;
     int max = 0;
 
     if ( !PyArg_ParseTuple(args, "s#i:max", &cp, &len, &size) )
@@ -346,8 +348,8 @@ static PyObject *
 audioop_minmax(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
+    Py_ssize_t len, i;
+    int size, val = 0;
     int min = 0x7fffffff, max = -0x7fffffff;
 
     if (!PyArg_ParseTuple(args, "s#i:minmax", &cp, &len, &size))
@@ -370,8 +372,8 @@ static PyObject *
 audioop_avg(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
+    Py_ssize_t len, i;
+    int size, val = 0;
     double avg = 0.0;
 
     if ( !PyArg_ParseTuple(args, "s#i:avg", &cp, &len, &size) )
@@ -397,8 +399,8 @@ static PyObject *
 audioop_rms(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
+    Py_ssize_t len, i;
+    int size, val = 0;
     double sum_squares = 0.0;
 
     if ( !PyArg_ParseTuple(args, "s#i:rms", &cp, &len, &size) )
@@ -420,9 +422,9 @@ audioop_rms(PyObject *self, PyObject *args)
     return PyLong_FromLong(val);
 }
 
-static double _sum2(short *a, short *b, int len)
+static double _sum2(short *a, short *b, Py_ssize_t len)
 {
-    int i;
+    Py_ssize_t i;
     double sum = 0.0;
 
     for( i=0; i<len; i++) {
@@ -467,8 +469,8 @@ static PyObject *
 audioop_findfit(PyObject *self, PyObject *args)
 {
     short *cp1, *cp2;
-    int len1, len2;
-    int j, best_j;
+    Py_ssize_t len1, len2;
+    Py_ssize_t j, best_j;
     double aj_m1, aj_lm1;
     double sum_ri_2, sum_aij_2, sum_aij_ri, result, best_result, factor;
 
@@ -519,7 +521,7 @@ audioop_findfit(PyObject *self, PyObject *args)
 
     factor = _sum2(cp1+best_j, cp2, len2) / sum_ri_2;
 
-    return Py_BuildValue("(if)", best_j, factor);
+    return Py_BuildValue("(nf)", best_j, factor);
 }
 
 /*
@@ -530,7 +532,7 @@ static PyObject *
 audioop_findfactor(PyObject *self, PyObject *args)
 {
     short *cp1, *cp2;
-    int len1, len2;
+    Py_ssize_t len1, len2;
     double sum_ri_2, sum_aij_ri, result;
 
     if ( !PyArg_ParseTuple(args, "s#s#:findfactor",
@@ -561,12 +563,12 @@ static PyObject *
 audioop_findmax(PyObject *self, PyObject *args)
 {
     short *cp1;
-    int len1, len2;
-    int j, best_j;
+    Py_ssize_t len1, len2;
+    Py_ssize_t j, best_j;
     double aj_m1, aj_lm1;
     double result, best_result;
 
-    if ( !PyArg_ParseTuple(args, "s#i:findmax",
+    if ( !PyArg_ParseTuple(args, "s#n:findmax",
                            (char**)&cp1, &len1, &len2) )
         return 0;
     if ( len1 & 1 ) {
@@ -599,16 +601,16 @@ audioop_findmax(PyObject *self, PyObject *args)
 
     }
 
-    return PyLong_FromLong(best_j);
+    return PyLong_FromSsize_t(best_j);
 }
 
 static PyObject *
 audioop_avgpp(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0, prevval = 0, prevextremevalid = 0,
+    Py_ssize_t len, i;
+    int size, val = 0, prevval = 0, prevextremevalid = 0,
         prevextreme = 0;
-    int i;
     double avg = 0.0;
     int diff, prevdiff, extremediff, nextreme = 0;
 
@@ -663,9 +665,9 @@ static PyObject *
 audioop_maxpp(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0, prevval = 0, prevextremevalid = 0,
+    Py_ssize_t len, i;
+    int size, val = 0, prevval = 0, prevextremevalid = 0,
         prevextreme = 0;
-    int i;
     int max = 0;
     int diff, prevdiff, extremediff;
 
@@ -716,9 +718,10 @@ static PyObject *
 audioop_cross(PyObject *self, PyObject *args)
 {
     signed char *cp;
-    int len, size, val = 0;
-    int i;
-    int prevval, ncross;
+    Py_ssize_t len, i;
+    int size, val = 0;
+    int prevval;
+    Py_ssize_t ncross;
 
     if ( !PyArg_ParseTuple(args, "s#i:cross", &cp, &len, &size) )
         return 0;
@@ -736,17 +739,17 @@ audioop_cross(PyObject *self, PyObject *args)
         if ( val != prevval ) ncross++;
         prevval = val;
     }
-    return PyLong_FromLong(ncross);
+    return PyLong_FromSsize_t(ncross);
 }
 
 static PyObject *
 audioop_mul(PyObject *self, PyObject *args)
 {
     signed char *cp, *ncp;
-    int len, size, val = 0;
+    Py_ssize_t len, i;
+    int size, val = 0;
     double factor, fval, maxval;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#id:mul", &cp, &len, &size, &factor ) )
         return 0;
@@ -785,10 +788,10 @@ audioop_tomono(PyObject *self, PyObject *args)
 {
     Py_buffer pcp;
     signed char *cp, *ncp;
-    int len, size, val1 = 0, val2 = 0;
+    Py_ssize_t len, i;
+    int size, val1 = 0, val2 = 0;
     double fac1, fac2, fval, maxval;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s*idd:tomono",
                            &pcp, &size, &fac1, &fac2 ) )
@@ -834,10 +837,10 @@ static PyObject *
 audioop_tostereo(PyObject *self, PyObject *args)
 {
     signed char *cp, *ncp;
-    int len, size, val1, val2, val = 0;
+    Py_ssize_t len, i;
+    int size, val1, val2, val = 0;
     double fac1, fac2, fval, maxval;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#idd:tostereo",
                            &cp, &len, &size, &fac1, &fac2 ) )
@@ -851,7 +854,7 @@ audioop_tostereo(PyObject *self, PyObject *args)
         return 0;
     }
 
-    if (len > INT_MAX/2) {
+    if (len > PY_SSIZE_T_MAX/2) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return 0;
@@ -893,9 +896,9 @@ static PyObject *
 audioop_add(PyObject *self, PyObject *args)
 {
     signed char *cp1, *cp2, *ncp;
-    int len1, len2, size, val1 = 0, val2 = 0, maxval, newval;
+    Py_ssize_t len1, len2, i;
+    int size, val1 = 0, val2 = 0, maxval, newval;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#s#i:add",
                       &cp1, &len1, &cp2, &len2, &size ) )
@@ -946,9 +949,9 @@ static PyObject *
 audioop_bias(PyObject *self, PyObject *args)
 {
     signed char *cp, *ncp;
-    int len, size, val = 0;
+    Py_ssize_t len, i;
+    int size, val = 0;
     PyObject *rv;
-    int i;
     int bias;
 
     if ( !PyArg_ParseTuple(args, "s#ii:bias",
@@ -983,9 +986,9 @@ audioop_reverse(PyObject *self, PyObject *args)
 {
     signed char *cp;
     unsigned char *ncp;
-    int len, size, val = 0;
+    Py_ssize_t len, i, j;
+    int size, val = 0;
     PyObject *rv;
-    int i, j;
 
     if ( !PyArg_ParseTuple(args, "s#i:reverse",
                       &cp, &len, &size) )
@@ -1020,9 +1023,9 @@ audioop_lin2lin(PyObject *self, PyObject *args)
 {
     signed char *cp;
     unsigned char *ncp;
-    int len, size, size2, val = 0;
+    Py_ssize_t len, i, j;
+    int size, size2, val = 0;
     PyObject *rv;
-    int i, j;
 
     if ( !PyArg_ParseTuple(args, "s#ii:lin2lin",
                       &cp, &len, &size, &size2) )
@@ -1034,7 +1037,7 @@ audioop_lin2lin(PyObject *self, PyObject *args)
         return 0;
     }
 
-    if (len/size > INT_MAX/size2) {
+    if (len/size > PY_SSIZE_T_MAX/size2) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return 0;
@@ -1071,7 +1074,8 @@ static PyObject *
 audioop_ratecv(PyObject *self, PyObject *args)
 {
     char *cp, *ncp;
-    int len, size, nchannels, inrate, outrate, weightA, weightB;
+    Py_ssize_t len;
+    int size, nchannels, inrate, outrate, weightA, weightB;
     int chan, d, *prev_i, *cur_i, cur_o;
     PyObject *state, *samps, *str, *rv = NULL;
     int bytes_per_frame;
@@ -1164,8 +1168,8 @@ audioop_ratecv(PyObject *self, PyObject *args)
            case ceiling(len/inrate) * outrate. */
 
         /* compute ceiling(len/inrate) without overflow */
-        int q = len > 0 ? 1 + (len - 1) / inrate : 0;
-        if (outrate > INT_MAX / q / bytes_per_frame)
+        Py_ssize_t q = len > 0 ? 1 + (len - 1) / inrate : 0;
+        if (outrate > PY_SSIZE_T_MAX / q / bytes_per_frame)
             str = NULL;
         else
             str = PyBytes_FromStringAndSize(NULL,
@@ -1194,7 +1198,7 @@ audioop_ratecv(PyObject *self, PyObject *args)
                     goto exit;
                 /* We have checked before that the length
                  * of the string fits into int. */
-                len = (int)(ncp - PyBytes_AsString(str));
+                len = (Py_ssize_t)(ncp - PyBytes_AsString(str));
                 rv = PyBytes_FromStringAndSize
                     (PyBytes_AsString(str), len);
                 Py_DECREF(str);
@@ -1253,9 +1257,9 @@ audioop_lin2ulaw(PyObject *self, PyObject *args)
 {
     signed char *cp;
     unsigned char *ncp;
-    int len, size, val = 0;
+    Py_ssize_t len, i;
+    int size, val = 0;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#i:lin2ulaw",
                            &cp, &len, &size) )
@@ -1287,9 +1291,9 @@ audioop_ulaw2lin(PyObject *self, PyObject *args)
     unsigned char *cp;
     unsigned char cval;
     signed char *ncp;
-    int len, size, val;
+    Py_ssize_t len, i;
+    int size, val;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#i:ulaw2lin",
                            &cp, &len, &size) )
@@ -1300,7 +1304,7 @@ audioop_ulaw2lin(PyObject *self, PyObject *args)
         return 0;
     }
 
-    if (len > INT_MAX/size) {
+    if (len > PY_SSIZE_T_MAX/size) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return 0;
@@ -1326,9 +1330,9 @@ audioop_lin2alaw(PyObject *self, PyObject *args)
 {
     signed char *cp;
     unsigned char *ncp;
-    int len, size, val = 0;
+    Py_ssize_t len, i;
+    int size, val = 0;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#i:lin2alaw",
                            &cp, &len, &size) )
@@ -1360,9 +1364,9 @@ audioop_alaw2lin(PyObject *self, PyObject *args)
     unsigned char *cp;
     unsigned char cval;
     signed char *ncp;
-    int len, size, val;
+    Py_ssize_t len, i;
+    int size, val;
     PyObject *rv;
-    int i;
 
     if ( !PyArg_ParseTuple(args, "s#i:alaw2lin",
                            &cp, &len, &size) )
@@ -1373,7 +1377,7 @@ audioop_alaw2lin(PyObject *self, PyObject *args)
         return 0;
     }
 
-    if (len > INT_MAX/size) {
+    if (len > PY_SSIZE_T_MAX/size) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return 0;
@@ -1399,10 +1403,11 @@ audioop_lin2adpcm(PyObject *self, PyObject *args)
 {
     signed char *cp;
     signed char *ncp;
-    int len, size, val = 0, step, valpred, delta,
+    Py_ssize_t len, i;
+    int size, val = 0, step, valpred, delta,
         index, sign, vpdiff, diff;
     PyObject *rv, *state, *str;
-    int i, outputbuffer = 0, bufferstep;
+    int outputbuffer = 0, bufferstep;
 
     if ( !PyArg_ParseTuple(args, "s#iO:lin2adpcm",
                            &cp, &len, &size, &state) )
@@ -1508,9 +1513,10 @@ audioop_adpcm2lin(PyObject *self, PyObject *args)
 {
     signed char *cp;
     signed char *ncp;
-    int len, size, valpred, step, delta, index, sign, vpdiff;
+    Py_ssize_t len, i;
+    int size, valpred, step, delta, index, sign, vpdiff;
     PyObject *rv, *str, *state;
-    int i, inputbuffer = 0, bufferstep;
+    int inputbuffer = 0, bufferstep;
 
     if ( !PyArg_ParseTuple(args, "s#iO:adpcm2lin",
                            &cp, &len, &size, &state) )
@@ -1530,7 +1536,7 @@ audioop_adpcm2lin(PyObject *self, PyObject *args)
     } else if ( !PyArg_ParseTuple(state, "ii", &valpred, &index) )
         return 0;
 
-    if (len > (INT_MAX/2)/size) {
+    if (len > (PY_SSIZE_T_MAX/2)/size) {
         PyErr_SetString(PyExc_MemoryError,
                         "not enough memory for output buffer");
         return 0;
-- 
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