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pyBigWig.c
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pyBigWig.c
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#include <Python.h>
#include <inttypes.h>
#include "pyBigWig.h"
#ifdef WITHNUMPY
#include <float.h>
#include "numpy/npy_common.h"
#include "numpy/halffloat.h"
#include "numpy/ndarrayobject.h"
#include "numpy/arrayscalars.h"
int lsize = NPY_SIZEOF_LONG;
//Raises an exception on error, which should be checked
uint32_t getNumpyU32(PyArrayObject *obj, Py_ssize_t i) {
int dtype;
char *p;
uint32_t o = 0;
npy_intp stride;
//Get the dtype
dtype = PyArray_TYPE(obj);
//Get the stride
stride = PyArray_STRIDE(obj, 0);
p = PyArray_BYTES(obj) + i*stride;
switch(dtype) {
case NPY_INT8:
if(((int8_t *) p)[0] < 0) {
PyErr_SetString(PyExc_RuntimeError, "Received an integer < 0!\n");
goto error;
}
o += ((int8_t *) p)[0];
break;
case NPY_INT16:
if(((int16_t *) p)[0] < 0) {
PyErr_SetString(PyExc_RuntimeError, "Received an integer < 0!\n");
goto error;
}
o += ((int16_t *) p)[0];
break;
case NPY_INT32:
if(((int32_t *) p)[0] < 0) {
PyErr_SetString(PyExc_RuntimeError, "Received an integer < 0!\n");
goto error;
}
o += ((int32_t *) p)[0];
break;
case NPY_INT64:
if(((int64_t *) p)[0] < 0) {
PyErr_SetString(PyExc_RuntimeError, "Received an integer < 0!\n");
goto error;
}
o += ((int64_t *) p)[0];
break;
case NPY_UINT8:
o += ((uint8_t *) p)[0];
break;
case NPY_UINT16:
o += ((uint16_t *) p)[0];
break;
case NPY_UINT32:
o += ((uint32_t *) p)[0];
break;
case NPY_UINT64:
if(((uint64_t *) p)[0] > (uint32_t) -1) {
PyErr_SetString(PyExc_RuntimeError, "Received an integer larger than possible for a 32bit unsigned integer!\n");
goto error;
}
o += ((uint64_t *) p)[0];
break;
default:
PyErr_SetString(PyExc_RuntimeError, "Received unknown data type for conversion to uint32_t!\n");
goto error;
break;
}
return o;
error:
return 0;
};
long getNumpyL(PyObject *obj) {
short s;
int i;
long l;
long long ll;
unsigned short us;
unsigned int ui;
unsigned long ul;
unsigned long long ull;
if(!PyArray_IsIntegerScalar(obj)) {
PyErr_SetString(PyExc_RuntimeError, "Received non-Integer scalar type for conversion to long!\n");
return 0;
}
if(PyArray_IsScalar(obj, Short)) {
s = ((PyShortScalarObject *)obj)->obval;
l = s;
} else if(PyArray_IsScalar(obj, Int)) {
i = ((PyLongScalarObject *)obj)->obval;
l = i;
} else if(PyArray_IsScalar(obj, Long)) {
l = ((PyLongScalarObject *)obj)->obval;
} else if(PyArray_IsScalar(obj, LongLong)) {
ll = ((PyLongScalarObject *)obj)->obval;
l = ll;
} else if(PyArray_IsScalar(obj, UShort)) {
us = ((PyLongScalarObject *)obj)->obval;
l = us;
} else if(PyArray_IsScalar(obj, UInt)) {
ui = ((PyLongScalarObject *)obj)->obval;
l = ui;
} else if(PyArray_IsScalar(obj, ULong)) {
ul = ((PyLongScalarObject *)obj)->obval;
l = ul;
} else if(PyArray_IsScalar(obj, ULongLong)) {
ull = ((PyLongScalarObject *)obj)->obval;
l = ull;
} else {
PyErr_SetString(PyExc_RuntimeError, "Received unknown scalar type for conversion to long!\n");
return 0;
}
return l;
}
//Raises an exception on error, which should be checked
float getNumpyF(PyArrayObject *obj, Py_ssize_t i) {
int dtype;
char *p;
float o = 0.0;
npy_intp stride;
//Get the dtype
dtype = PyArray_TYPE(obj);
//Get the stride
stride = PyArray_STRIDE(obj, 0);
p = PyArray_BYTES(obj) + i*stride;
switch(dtype) {
case NPY_FLOAT16:
return npy_half_to_float(((npy_half*)p)[0]);
case NPY_FLOAT32:
return ((float*)p)[0];
case NPY_FLOAT64:
if(((double*)p)[0] > FLT_MAX) {
PyErr_SetString(PyExc_RuntimeError, "Received a floating point value greater than possible for a 32-bit float!\n");
goto error;
}
if(((double*)p)[0] < -FLT_MAX) {
PyErr_SetString(PyExc_RuntimeError, "Received a floating point value less than possible for a 32-bit float!\n");
goto error;
}
o += ((double*)p)[0];
return o;
default:
PyErr_SetString(PyExc_RuntimeError, "Received unknown data type for conversion to float!\n");
goto error;
break;
}
return o;
error:
return 0;
}
//The calling function needs to free the result
char *getNumpyStr(PyArrayObject *obj, Py_ssize_t i) {
char *p , *o = NULL;
npy_intp stride, j;
int dtype;
//Get the dtype
dtype = PyArray_TYPE(obj);
//Get the stride
stride = PyArray_STRIDE(obj, 0);
p = PyArray_BYTES(obj) + i*stride;
switch(dtype) {
case NPY_STRING:
o = calloc(1, stride + 1);
strncpy(o, p, stride);
return o;
case NPY_UNICODE:
o = calloc(1, stride/4 + 1);
for(j=0; j<stride/4; j++) o[j] = (char) ((uint32_t*)p)[j];
return o;
default:
PyErr_SetString(PyExc_RuntimeError, "Received unknown data type!\n");
break;
}
return NULL;
}
#endif
//Return 1 if there are any entries at all
int hasEntries(bigWigFile_t *bw) {
if(bw->hdr->indexOffset != 0) return 1; // No index, no entries pyBigWig issue #111
//if(bw->hdr->nBasesCovered > 0) return 1; // Sometimes headers are broken
return 0;
}
PyObject* pyBwEnter(pyBigWigFile_t*self, PyObject *args) {
bigWigFile_t *bw = self->bw;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not opened!");
return NULL;
}
Py_INCREF(self);
return (PyObject*) self;
}
PyObject* pyBwOpen(PyObject *self, PyObject *pyFname) {
char *fname = NULL;
char *mode = "r";
pyBigWigFile_t *pybw;
bigWigFile_t *bw = NULL;
if(!PyArg_ParseTuple(pyFname, "s|s", &fname, &mode)) goto error;
//Open the local/remote file
if(strchr(mode, 'w') != NULL || bwIsBigWig(fname, NULL)) {
bw = bwOpen(fname, NULL, mode);
} else {
bw = bbOpen(fname, NULL);
}
if(!bw) {
fprintf(stderr, "[pyBwOpen] bw is NULL!\n");
goto error;
}
if(!mode || !strchr(mode, 'w')) {
if(!bw->cl) goto error;
}
pybw = PyObject_New(pyBigWigFile_t, &bigWigFile);
if(!pybw) {
fprintf(stderr, "[pyBwOpen] PyObject_New() returned NULL (out of memory?)!\n");
goto error;
}
pybw->bw = bw;
pybw->lastTid = -1;
pybw->lastType = -1;
pybw->lastSpan = (uint32_t) -1;
pybw->lastStep = (uint32_t) -1;
pybw->lastStart = (uint32_t) -1;
return (PyObject*) pybw;
error:
if(bw) bwClose(bw);
PyErr_SetString(PyExc_RuntimeError, "Received an error during file opening!");
return NULL;
}
static void pyBwDealloc(pyBigWigFile_t *self) {
if(self->bw) bwClose(self->bw);
PyObject_DEL(self);
}
static PyObject *pyBwClose(pyBigWigFile_t *self, PyObject *args) {
bwClose(self->bw);
self->bw = NULL;
Py_INCREF(Py_None);
return Py_None;
}
//Accessor for the header (version, nLevels, nBasesCovered, minVal, maxVal, sumData, sumSquared
static PyObject *pyBwGetHeader(pyBigWigFile_t *self, PyObject *args) {
bigWigFile_t *bw = self->bw;
PyObject *ret, *val;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not opened!");
return NULL;
}
if(bw->isWrite == 1) {
PyErr_SetString(PyExc_RuntimeError, "The header cannot be accessed in files opened for writing!");
return NULL;
}
ret = PyDict_New();
val = PyLong_FromUnsignedLong(bw->hdr->version);
if(PyDict_SetItemString(ret, "version", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromUnsignedLong(bw->hdr->nLevels);
if(PyDict_SetItemString(ret, "nLevels", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromUnsignedLongLong(bw->hdr->nBasesCovered);
if(PyDict_SetItemString(ret, "nBasesCovered", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromDouble(bw->hdr->minVal);
if(PyDict_SetItemString(ret, "minVal", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromDouble(bw->hdr->maxVal);
if(PyDict_SetItemString(ret, "maxVal", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromDouble(bw->hdr->sumData);
if(PyDict_SetItemString(ret, "sumData", val) == -1) goto error;
Py_DECREF(val);
val = PyLong_FromDouble(bw->hdr->sumSquared);
if(PyDict_SetItemString(ret, "sumSquared", val) == -1) goto error;
Py_DECREF(val);
return ret;
error :
Py_XDECREF(val);
Py_XDECREF(ret);
PyErr_SetString(PyExc_RuntimeError, "Received an error while getting the bigWig header!");
return NULL;
}
//Accessor for the chroms, args is optional
static PyObject *pyBwGetChroms(pyBigWigFile_t *self, PyObject *args) {
PyObject *ret = NULL, *val;
bigWigFile_t *bw = self->bw;
char *chrom = NULL;
uint32_t i;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not opened!");
return NULL;
}
if(bw->isWrite == 1) {
PyErr_SetString(PyExc_RuntimeError, "Chromosomes cannot be accessed in files opened for writing!");
return NULL;
}
if(!(PyArg_ParseTuple(args, "|s", &chrom)) || !chrom) {
ret = PyDict_New();
for(i=0; i<bw->cl->nKeys; i++) {
val = PyLong_FromUnsignedLong(bw->cl->len[i]);
if(PyDict_SetItemString(ret, bw->cl->chrom[i], val) == -1) goto error;
Py_DECREF(val);
}
} else {
for(i=0; i<bw->cl->nKeys; i++) {
if(strcmp(bw->cl->chrom[i],chrom) == 0) {
ret = PyLong_FromUnsignedLong(bw->cl->len[i]);
break;
}
}
}
if(!ret) {
Py_INCREF(Py_None);
ret = Py_None;
}
return ret;
error :
Py_XDECREF(val);
Py_XDECREF(ret);
PyErr_SetString(PyExc_RuntimeError, "Received an error while adding an item to the output dictionary!");
return NULL;
}
enum bwStatsType char2enum(char *s) {
if(strcmp(s, "mean") == 0) return mean;
if(strcmp(s, "std") == 0) return stdev;
if(strcmp(s, "dev") == 0) return dev;
if(strcmp(s, "max") == 0) return max;
if(strcmp(s, "min") == 0) return min;
if(strcmp(s, "cov") == 0) return cov;
if(strcmp(s, "coverage") == 0) return cov;
if(strcmp(s, "sum") == 0) return sum;
return -1;
};
//Fetch summary statistics, default is the mean of the entire chromosome.
static PyObject *pyBwGetStats(pyBigWigFile_t *self, PyObject *args, PyObject *kwds) {
bigWigFile_t *bw = self->bw;
double *val;
uint32_t start, end = -1, tid;
unsigned long startl = 0, endl = -1;
static char *kwd_list[] = {"chrom", "start", "end", "type", "nBins", "exact", "numpy", NULL};
char *chrom, *type = "mean";
PyObject *ret, *exact = Py_False, *starto = NULL, *endo = NULL;
PyObject *outputNumpy = Py_False;
int i, nBins = 1;
errno = 0; //In the off-chance that something elsewhere got an error and didn't clear it...
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not open!");
return NULL;
}
if(bw->isWrite == 1) {
PyErr_SetString(PyExc_RuntimeError, "Statistics cannot be accessed in files opened for writing!");
return NULL;
}
if(bw->type == 1) {
PyErr_SetString(PyExc_RuntimeError, "bigBed files have no statistics!");
return NULL;
}
if(!PyArg_ParseTupleAndKeywords(args, kwds, "s|OOsiOO", kwd_list, &chrom, &starto, &endo, &type, &nBins, &exact, &outputNumpy)) {
PyErr_SetString(PyExc_RuntimeError, "You must supply at least a chromosome!");
return NULL;
}
//Check inputs, reset to defaults if nothing was input
if(!nBins) nBins = 1; //For some reason, not specifying this overrides the default!
if(!type) type = "mean";
tid = bwGetTid(bw, chrom);
if(starto) {
#ifdef WITHNUMPY
if(PyArray_IsScalar(starto, Integer)) {
startl = (long) getNumpyL(starto);
} else
#endif
if(PyLong_Check(starto)) {
startl = PyLong_AsLong(starto);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(starto)) {
startl = PyInt_AsLong(starto);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The start coordinate must be a number!");
return NULL;
}
}
if(endo) {
#ifdef WITHNUMPY
if(PyArray_IsScalar(endo, Integer)) {
endl = (long) getNumpyL(endo);
} else
#endif
if(PyLong_Check(endo)) {
endl = PyLong_AsLong(endo);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(endo)) {
endl = PyInt_AsLong(endo);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The end coordinate must be a number!");
return NULL;
}
}
if(endl == (unsigned long) -1 && tid != (uint32_t) -1) endl = bw->cl->len[tid];
if(tid == (uint32_t) -1 || startl > end || endl > end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
start = (uint32_t) startl;
end = (uint32_t) endl;
if(end <= start || end > bw->cl->len[tid] || start >= end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
if(char2enum(type) == doesNotExist) {
PyErr_SetString(PyExc_RuntimeError, "Invalid type!");
return NULL;
}
//Return a list of None if there are no entries at all
if(!hasEntries(bw)) {
#ifdef WITHNUMPY
if(outputNumpy == Py_True) {
val = malloc(sizeof(double)*nBins);
for(i=0; i<nBins; i++) {
val[i] = NPY_NAN;
}
npy_intp len = nBins;
ret = PyArray_SimpleNewFromData(1, &len, NPY_FLOAT64, (void *) val);
//This will break if numpy ever stops using malloc!
PyArray_ENABLEFLAGS((PyArrayObject*) ret, NPY_ARRAY_OWNDATA);
} else {
#endif
ret = PyList_New(nBins);
for(i=0; i<nBins; i++) {
Py_INCREF(Py_None);
PyList_SetItem(ret, i, Py_None);
}
#ifdef WITHNUMPY
}
#endif
return ret;
}
//Get the actual statistics
if(exact == Py_True) {
val = bwStatsFromFull(bw, chrom, start, end, nBins, char2enum(type));
} else {
val = bwStats(bw, chrom, start, end, nBins, char2enum(type));
}
if(!val) {
PyErr_SetString(PyExc_RuntimeError, "An error was encountered while fetching statistics.");
return NULL;
}
#ifdef WITHNUMPY
if(outputNumpy == Py_True) {
npy_intp len = nBins;
ret = PyArray_SimpleNewFromData(1, &len, NPY_FLOAT64, (void *) val);
//This will break if numpy ever stops using malloc!
PyArray_ENABLEFLAGS((PyArrayObject*) ret, NPY_ARRAY_OWNDATA);
} else {
#endif
ret = PyList_New(nBins);
for(i=0; i<nBins; i++) {
if(isnan(val[i])) {
Py_INCREF(Py_None);
PyList_SetItem(ret, i, Py_None);
} else {
PyList_SetItem(ret, i, PyFloat_FromDouble(val[i]));
}
}
free(val);
#ifdef WITHNUMPY
}
#endif
return ret;
}
//Fetch a list of individual values
//For bases with no coverage, the value should be None
#ifdef WITHNUMPY
static PyObject *pyBwGetValues(pyBigWigFile_t *self, PyObject *args, PyObject *kwds) {
#else
static PyObject *pyBwGetValues(pyBigWigFile_t *self, PyObject *args) {
#endif
bigWigFile_t *bw = self->bw;
int i;
uint32_t start, end = -1, tid;
unsigned long startl, endl;
char *chrom;
PyObject *ret, *starto = NULL, *endo = NULL;
bwOverlappingIntervals_t *o;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not open!");
return NULL;
}
if(bw->type == 1) {
PyErr_SetString(PyExc_RuntimeError, "bigBed files have no values! Use 'entries' instead.");
return NULL;
}
#ifdef WITHNUMPY
static char *kwd_list[] = {"chrom", "start", "end", "numpy", NULL};
PyObject *outputNumpy = Py_False;
if(!PyArg_ParseTupleAndKeywords(args, kwds, "sOO|O", kwd_list, &chrom, &starto, &endo, &outputNumpy)) {
#else
if(!PyArg_ParseTuple(args, "sOO", &chrom, &starto, &endo)) {
#endif
PyErr_SetString(PyExc_RuntimeError, "You must supply a chromosome, start and end position.\n");
return NULL;
}
tid = bwGetTid(bw, chrom);
#ifdef WITHNUMPY
if(PyArray_IsScalar(starto, Integer)) {
startl = (long) getNumpyL(starto);
} else
#endif
if(PyLong_Check(starto)) {
startl = PyLong_AsLong(starto);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(starto)) {
startl = PyInt_AsLong(starto);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The start coordinate must be a number!");
return NULL;
}
#ifdef WITHNUMPY
if(PyArray_IsScalar(endo, Integer)) {
endl = (long) getNumpyL(endo);
} else
#endif
if(PyLong_Check(endo)) {
endl = PyLong_AsLong(endo);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(endo)) {
endl = PyInt_AsLong(endo);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The end coordinate must be a number!");
return NULL;
}
if(endl == (unsigned long) -1 && tid != (uint32_t) -1) endl = bw->cl->len[tid];
if(tid == (uint32_t) -1 || startl > end || endl > end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
start = (uint32_t) startl;
end = (uint32_t) endl;
if(end <= start || end > bw->cl->len[tid] || start >= end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
if(!hasEntries(self->bw)) {
#ifdef WITHNUMPY
if(outputNumpy == Py_True) {
return PyArray_SimpleNew(0, NULL, NPY_FLOAT);
} else {
#endif
return PyList_New(0);
#ifdef WITHNUMPY
}
#endif
}
o = bwGetValues(self->bw, chrom, start, end, 1);
if(!o) {
PyErr_SetString(PyExc_RuntimeError, "An error occurred while fetching values!");
return NULL;
}
#ifdef WITHNUMPY
if(outputNumpy == Py_True) {
npy_intp len = end - start;
ret = PyArray_SimpleNewFromData(1, &len, NPY_FLOAT, (void *) o->value);
//This will break if numpy ever stops using malloc!
PyArray_ENABLEFLAGS((PyArrayObject*) ret, NPY_ARRAY_OWNDATA);
free(o->start);
free(o->end);
free(o);
} else {
#endif
ret = PyList_New(end-start);
for(i=0; i<(int) o->l; i++) PyList_SetItem(ret, i, PyFloat_FromDouble(o->value[i]));
bwDestroyOverlappingIntervals(o);
#ifdef WITHNUMPY
}
#endif
return ret;
}
static PyObject *pyBwGetIntervals(pyBigWigFile_t *self, PyObject *args, PyObject *kwds) {
bigWigFile_t *bw = self->bw;
uint32_t start, end = -1, tid, i;
unsigned long startl = 0, endl = -1;
static char *kwd_list[] = {"chrom", "start", "end", NULL};
bwOverlappingIntervals_t *intervals = NULL;
char *chrom;
PyObject *ret, *starto = NULL, *endo = NULL;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not opened!");
return NULL;
}
if(bw->isWrite == 1) {
PyErr_SetString(PyExc_RuntimeError, "Intervals cannot be accessed in files opened for writing!");
return NULL;
}
if(bw->type == 1) {
PyErr_SetString(PyExc_RuntimeError, "bigBed files have no intervals! Use 'entries()' instead.");
return NULL;
}
if(!PyArg_ParseTupleAndKeywords(args, kwds, "s|OO", kwd_list, &chrom, &starto, &endo)) {
PyErr_SetString(PyExc_RuntimeError, "You must supply at least a chromosome.\n");
return NULL;
}
//Sanity check
tid = bwGetTid(bw, chrom);
if(endl == (unsigned long) -1 && tid != (uint32_t) -1) endl = bw->cl->len[tid];
if(tid == (uint32_t) -1 || startl > end || endl > end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
if(starto) {
#ifdef WITHNUMPY
if(PyArray_IsScalar(starto, Integer)) {
startl = (long) getNumpyL(starto);
} else
#endif
if(PyLong_Check(starto)) {
startl = PyLong_AsLong(starto);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(starto)) {
startl = PyInt_AsLong(starto);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The start coordinate must be a number!");
return NULL;
}
}
if(endo) {
#ifdef WITHNUMPY
if(PyArray_IsScalar(endo, Integer)) {
endl = (long) getNumpyL(endo);
} else
#endif
if(PyLong_Check(endo)) {
endl = PyLong_AsLong(endo);
#if PY_MAJOR_VERSION < 3
} else if(PyInt_Check(endo)) {
endl = PyInt_AsLong(endo);
#endif
} else {
PyErr_SetString(PyExc_RuntimeError, "The end coordinate must be a number!");
return NULL;
}
}
start = (uint32_t) startl;
end = (uint32_t) endl;
if(end <= start || end > bw->cl->len[tid] || start >= end) {
PyErr_SetString(PyExc_RuntimeError, "Invalid interval bounds!");
return NULL;
}
//Check for empty files
if(!hasEntries(bw)) {
Py_INCREF(Py_None);
return Py_None;
}
//Get the intervals
intervals = bwGetOverlappingIntervals(bw, chrom, start, end);
if(!intervals) {
PyErr_SetString(PyExc_RuntimeError, "An error occurred while fetching the overlapping intervals!");
return NULL;
}
if(!intervals->l) {
Py_INCREF(Py_None);
return Py_None;
}
ret = PyTuple_New(intervals->l);
for(i=0; i<intervals->l; i++) {
if(PyTuple_SetItem(ret, i, Py_BuildValue("(iif)", intervals->start[i], intervals->end[i], intervals->value[i]))) {
Py_DECREF(ret);
bwDestroyOverlappingIntervals(intervals);
PyErr_SetString(PyExc_RuntimeError, "An error occurred while constructing the output tuple!");
return NULL;
}
}
bwDestroyOverlappingIntervals(intervals);
return ret;
}
#if PY_MAJOR_VERSION >= 3
//Return 1 iff obj is a ready unicode type
int PyString_Check(PyObject *obj) {
if(PyUnicode_Check(obj)) {
return PyUnicode_READY(obj)+1;
}
return 0;
}
//I don't know what happens if PyBytes_AsString(NULL) is used...
char *PyString_AsString(PyObject *obj) {
return PyUnicode_AsUTF8(obj);
}
#endif
//Will return 1 for long or int types currently
int isNumeric(PyObject *obj) {
#ifdef WITHNUMPY
if(PyArray_IsScalar(obj, Integer)) return 1;
#endif
#if PY_MAJOR_VERSION < 3
if(PyInt_Check(obj)) return 1;
#endif
return PyLong_Check(obj);
}
//On error, throws a runtime error, so use PyErr_Occurred() after this
uint32_t Numeric2Uint(PyObject *obj) {
long l;
#if PY_MAJOR_VERSION < 3
if(PyInt_Check(obj)) {
return (uint32_t) PyInt_AsLong(obj);
}
#endif
l = PyLong_AsLong(obj);
//Check bounds
if(l > 0xFFFFFFFF) {
PyErr_SetString(PyExc_RuntimeError, "Length out of bounds for a bigWig file!");
return (uint32_t) -1;
}
return (uint32_t) l;
}
//This runs bwCreateHdr, bwCreateChromList, and bwWriteHdr
PyObject *pyBwAddHeader(pyBigWigFile_t *self, PyObject *args, PyObject *kwds) {
bigWigFile_t *bw = self->bw;
char **chroms = NULL;
int64_t n;
uint32_t *lengths = NULL, len;
int32_t maxZooms = 10;
long zoomTmp = 10;
static char *kwd_list[] = {"cl", "maxZooms", NULL};
PyObject *InputTuple = NULL, *tmpObject, *tmpObject2;
Py_ssize_t i, pyLen;
if(!bw) {
PyErr_SetString(PyExc_RuntimeError, "The bigWig file handle is not open!");
return NULL;
}
if(!PyArg_ParseTupleAndKeywords(args, kwds, "O|k", kwd_list, &InputTuple, &zoomTmp)) {
PyErr_SetString(PyExc_RuntimeError, "Illegal arguments");
return NULL;
}
maxZooms = zoomTmp;
//Ensure that we received a list
if(!PyList_Check(InputTuple)) {
PyErr_SetString(PyExc_RuntimeError, "You MUST input a list of tuples (e.g., [('chr1', 1000), ('chr2', 2000)]!");
goto error;
}
pyLen = PyList_Size(InputTuple);
if(pyLen < 1) {
PyErr_SetString(PyExc_RuntimeError, "You input an empty list!");
goto error;
}
n = pyLen;
lengths = calloc(n, sizeof(uint32_t));
chroms = calloc(n, sizeof(char*));
if(!lengths || !chroms) {
PyErr_SetString(PyExc_RuntimeError, "Couldn't allocate lengths or chroms!");
goto error;
}
//Convert the tuple into something more useful in C
for(i=0; i<pyLen; i++) {
tmpObject = PyList_GetItem(InputTuple, i);
if(!tmpObject) {
PyErr_SetString(PyExc_RuntimeError, "Couldn't get a tuple!");
goto error;
}
if(!PyTuple_Check(tmpObject)) {
PyErr_SetString(PyExc_RuntimeError, "The input list is not made up of tuples!");
goto error;
}
if(PyTuple_Size(tmpObject) != 2) {
PyErr_SetString(PyExc_RuntimeError, "One tuple does not contain exactly 2 members!");
goto error;
}
//Chromosome
tmpObject2 = PyTuple_GetItem(tmpObject, 0); //This returns NULL in python3?!?
if(!PyString_Check(tmpObject2)) {
PyErr_SetString(PyExc_RuntimeError, "The first element of each tuple MUST be a string!");
goto error;
}
chroms[i] = PyString_AsString(tmpObject2);
if(!chroms[i]) {
PyErr_SetString(PyExc_RuntimeError, "Received something other than a string for a chromosome name!");
goto error;
}
//Length
tmpObject2 = PyTuple_GetItem(tmpObject, 1);
if(!isNumeric(tmpObject2)) {
PyErr_SetString(PyExc_RuntimeError, "The second element of each tuple MUST be an integer!");
goto error;
}
len = Numeric2Uint(tmpObject2);
if(PyErr_Occurred()) goto error;
if(zoomTmp > 0xFFFFFFFF) {
PyErr_SetString(PyExc_RuntimeError, "A requested length is longer than what can be stored in a bigWig file!");
goto error;
}
lengths[i] = len;
}
//Create the header
if(bwCreateHdr(bw, maxZooms)) {
PyErr_SetString(PyExc_RuntimeError, "Received an error in bwCreateHdr");
goto error;
}
//Create the chromosome list
bw->cl = bwCreateChromList(chroms, lengths, n);
if(!bw->cl) {
PyErr_SetString(PyExc_RuntimeError, "Received an error in bwCreateChromList");
goto error;
}
//Write the header
if(bwWriteHdr(bw)) {
PyErr_SetString(PyExc_RuntimeError, "Received an error while writing the bigWig header");
goto error;
}
if(lengths) free(lengths);
if(chroms) free(chroms);
Py_INCREF(Py_None);
return Py_None;
error:
if(lengths) free(lengths);
if(chroms) free(chroms);
return NULL;
}
//1 on true, 0 on false
int isType0(PyObject *chroms, PyObject *starts, PyObject *ends, PyObject *values) {
int rv = 0;
Py_ssize_t i, sz = 0;
PyObject *tmp;
if(!PyList_Check(chroms)
#ifdef WITHNUMPY
&& !PyArray_Check(chroms)
#endif
) return rv;
if(!PyList_Check(starts)
#ifdef WITHNUMPY
&& !PyArray_Check(starts)
#endif
) return rv;
if(!PyList_Check(ends)
#ifdef WITHNUMPY
&& !PyArray_Check(ends)
#endif
) return rv;
if(!PyList_Check(values)
#ifdef WITHNUMPY
&& !PyArray_Check(values)
#endif
) return rv;
if(PyList_Check(chroms)) sz = PyList_Size(chroms);
#ifdef WITHNUMPY
if(PyArray_Check(chroms)) sz += PyArray_Size(chroms);
#endif
if(PyList_Check(starts)) {
if(sz != PyList_Size(starts)) return rv;
#ifdef WITHNUMPY
} else {
if(sz != PyArray_Size(starts)) return rv;
#endif
}
if(PyList_Check(ends)) {
if(sz != PyList_Size(ends)) return rv;
#ifdef WITHNUMPY
} else {
if(sz != PyArray_Size(ends)) return rv;
#endif
}
if(PyList_Check(values)) {
if(sz != PyList_Size(values)) return rv;
#ifdef WITHNUMPY
} else {
if(sz != PyArray_Size(values)) return rv;
#endif
}
//Ensure chroms contains strings, etc.
if(PyList_Check(chroms)) {
for(i=0; i<sz; i++) {
tmp = PyList_GetItem(chroms, i);
if(!PyString_Check(tmp)) return rv;
}
#ifdef WITHNUMPY
} else {
if(!PyArray_ISSTRING( (PyArrayObject*) chroms)) return rv;
#endif
}
if(PyList_Check(starts)) {
for(i=0; i<sz; i++) {
tmp = PyList_GetItem(starts, i);
if(!isNumeric(tmp)) return rv;
}
#ifdef WITHNUMPY
} else {
if(!PyArray_ISINTEGER( (PyArrayObject*) starts)) return rv;
#endif
}
if(PyList_Check(ends)) {
for(i=0; i<sz; i++) {
tmp = PyList_GetItem(ends, i);
if(!isNumeric(tmp)) return rv;
}
#ifdef WITHNUMPY