[5ceb7d0] | 1 | """ |
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| 2 | SAS model constructor. |
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| 3 | |
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| 4 | Small angle scattering models are defined by a set of kernel functions: |
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| 5 | |
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| 6 | *Iq(q, p1, p2, ...)* returns the scattering at q for a form with |
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| 7 | particular dimensions averaged over all orientations. |
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| 8 | |
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| 9 | *Iqxy(qx, qy, p1, p2, ...)* returns the scattering at qx, qy for a form |
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| 10 | with particular dimensions for a single orientation. |
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| 11 | |
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| 12 | *Imagnetic(qx, qy, result[], p1, p2, ...)* returns the scattering for the |
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| 13 | polarized neutron spin states (up-up, up-down, down-up, down-down) for |
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| 14 | a form with particular dimensions for a single orientation. |
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| 15 | |
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| 16 | *form_volume(p1, p2, ...)* returns the volume of the form with particular |
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[e6408d0] | 17 | dimension, or 1.0 if no volume normalization is required. |
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[5ceb7d0] | 18 | |
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| 19 | *ER(p1, p2, ...)* returns the effective radius of the form with |
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| 20 | particular dimensions. |
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| 21 | |
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| 22 | *VR(p1, p2, ...)* returns the volume ratio for core-shell style forms. |
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| 23 | |
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[d5ac45f] | 24 | #define INVALID(v) (expr) returns False if v.parameter is invalid |
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| 25 | for some parameter or other (e.g., v.bell_radius < v.radius). If |
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| 26 | necessary, the expression can call a function. |
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| 27 | |
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[5ceb7d0] | 28 | These functions are defined in a kernel module .py script and an associated |
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| 29 | set of .c files. The model constructor will use them to create models with |
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| 30 | polydispersity across volume and orientation parameters, and provide |
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| 31 | scale and background parameters for each model. |
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| 32 | |
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| 33 | *Iq*, *Iqxy*, *Imagnetic* and *form_volume* should be stylized C-99 |
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| 34 | functions written for OpenCL. All functions need prototype declarations |
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| 35 | even if the are defined before they are used. OpenCL does not support |
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| 36 | *#include* preprocessor directives, so instead the list of includes needs |
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| 37 | to be given as part of the metadata in the kernel module definition. |
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| 38 | The included files should be listed using a path relative to the kernel |
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| 39 | module, or if using "lib/file.c" if it is one of the standard includes |
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| 40 | provided with the sasmodels source. The includes need to be listed in |
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| 41 | order so that functions are defined before they are used. |
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| 42 | |
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| 43 | Floating point values should be declared as *double*. For single precision |
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| 44 | calculations, *double* will be replaced by *float*. The single precision |
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| 45 | conversion will also tag floating point constants with "f" to make them |
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| 46 | single precision constants. When using integral values in floating point |
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| 47 | expressions, they should be expressed as floating point values by including |
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| 48 | a decimal point. This includes 0., 1. and 2. |
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| 49 | |
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| 50 | OpenCL has a *sincos* function which can improve performance when both |
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| 51 | the *sin* and *cos* values are needed for a particular argument. Since |
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| 52 | this function does not exist in C99, all use of *sincos* should be |
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| 53 | replaced by the macro *SINCOS(value, sn, cn)* where *sn* and *cn* are |
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| 54 | previously declared *double* variables. When compiled for systems without |
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| 55 | OpenCL, *SINCOS* will be replaced by *sin* and *cos* calls. If *value* is |
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| 56 | an expression, it will appear twice in this case; whether or not it will be |
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| 57 | evaluated twice depends on the quality of the compiler. |
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| 58 | |
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| 59 | If the input parameters are invalid, the scattering calculator should |
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| 60 | return a negative number. Particularly with polydispersity, there are |
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| 61 | some sets of shape parameters which lead to nonsensical forms, such |
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| 62 | as a capped cylinder where the cap radius is smaller than the |
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| 63 | cylinder radius. The polydispersity calculation will ignore these points, |
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| 64 | effectively chopping the parameter weight distributions at the boundary |
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| 65 | of the infeasible region. The resulting scattering will be set to |
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| 66 | background. This will work correctly even when polydispersity is off. |
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| 67 | |
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| 68 | *ER* and *VR* are python functions which operate on parameter vectors. |
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| 69 | The constructor code will generate the necessary vectors for computing |
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| 70 | them with the desired polydispersity. |
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| 71 | The kernel module must set variables defining the kernel meta data: |
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| 72 | |
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| 73 | *id* is an implicit variable formed from the filename. It will be |
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| 74 | a valid python identifier, and will be used as the reference into |
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| 75 | the html documentation, with '_' replaced by '-'. |
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| 76 | |
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| 77 | *name* is the model name as displayed to the user. If it is missing, |
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| 78 | it will be constructed from the id. |
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| 79 | |
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| 80 | *title* is a short description of the model, suitable for a tool tip, |
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| 81 | or a one line model summary in a table of models. |
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| 82 | |
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| 83 | *description* is an extended description of the model to be displayed |
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| 84 | while the model parameters are being edited. |
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| 85 | |
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| 86 | *parameters* is the list of parameters. Parameters in the kernel |
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| 87 | functions must appear in the same order as they appear in the |
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| 88 | parameters list. Two additional parameters, *scale* and *background* |
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| 89 | are added to the beginning of the parameter list. They will show up |
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| 90 | in the documentation as model parameters, but they are never sent to |
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[17bbadd] | 91 | the kernel functions. Note that *effect_radius* and *volfraction* |
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| 92 | must occur first in structure factor calculations. |
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[5ceb7d0] | 93 | |
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[17bbadd] | 94 | *category* is the default category for the model. The category is |
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| 95 | two level structure, with the form "group:section", indicating where |
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| 96 | in the manual the model will be located. Models are alphabetical |
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| 97 | within their section. |
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[5ceb7d0] | 98 | |
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| 99 | *source* is the list of C-99 source files that must be joined to |
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| 100 | create the OpenCL kernel functions. The files defining the functions |
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| 101 | need to be listed before the files which use the functions. |
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| 102 | |
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| 103 | *ER* is a python function defining the effective radius. If it is |
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| 104 | not present, the effective radius is 0. |
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| 105 | |
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| 106 | *VR* is a python function defining the volume ratio. If it is not |
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| 107 | present, the volume ratio is 1. |
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| 108 | |
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| 109 | *form_volume*, *Iq*, *Iqxy*, *Imagnetic* are strings containing the |
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| 110 | C source code for the body of the volume, Iq, and Iqxy functions |
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| 111 | respectively. These can also be defined in the last source file. |
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| 112 | |
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| 113 | *Iq* and *Iqxy* also be instead be python functions defining the |
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| 114 | kernel. If they are marked as *Iq.vectorized = True* then the |
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| 115 | kernel is passed the entire *q* vector at once, otherwise it is |
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| 116 | passed values one *q* at a time. The performance improvement of |
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| 117 | this step is significant. |
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| 118 | |
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| 119 | *demo* is a dictionary of parameter=value defining a set of |
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| 120 | parameters to use by default when *compare* is called. Any |
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| 121 | parameter not set in *demo* gets the initial value from the |
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| 122 | parameter list. *demo* is mostly needed to set the default |
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| 123 | polydispersity values for tests. |
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| 124 | |
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[a5b8477] | 125 | A :class:`modelinfo.ModelInfo` structure is constructed from the kernel meta |
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| 126 | data and returned to the caller. |
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[5ceb7d0] | 127 | |
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| 128 | The doc string at the start of the kernel module will be used to |
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| 129 | construct the model documentation web pages. Embedded figures should |
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| 130 | appear in the subdirectory "img" beside the model definition, and tagged |
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| 131 | with the kernel module name to avoid collision with other models. Some |
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| 132 | file systems are case-sensitive, so only use lower case characters for |
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| 133 | file names and extensions. |
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| 134 | |
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| 135 | Code follows the C99 standard with the following extensions and conditions:: |
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| 136 | |
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| 137 | M_PI_180 = pi/180 |
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| 138 | M_4PI_3 = 4pi/3 |
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| 139 | square(x) = x*x |
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| 140 | cube(x) = x*x*x |
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| 141 | sinc(x) = sin(x)/x, with sin(0)/0 -> 1 |
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| 142 | all double precision constants must include the decimal point |
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| 143 | all double declarations may be converted to half, float, or long double |
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| 144 | FLOAT_SIZE is the number of bytes in the converted variables |
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[a5b8477] | 145 | |
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| 146 | :func:`load_kernel_module` loads the model definition file and |
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| 147 | :modelinfo:`make_model_info` parses it. :func:`make_source` |
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| 148 | converts C-based model definitions to C source code, including the |
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| 149 | polydispersity integral. :func:`model_sources` returns the list of |
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| 150 | source files the model depends on, and :func:`timestamp` returns |
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| 151 | the latest time stamp amongst the source files (so you can check if |
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| 152 | the model needs to be rebuilt). |
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| 153 | |
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| 154 | The function :func:`make_doc` extracts the doc string and adds the |
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| 155 | parameter table to the top. *make_figure* in *sasmodels/doc/genmodel* |
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| 156 | creates the default figure for the model. [These two sets of code |
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| 157 | should mignrate into docs.py so docs can be updated in one place]. |
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[5ceb7d0] | 158 | """ |
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| 159 | from __future__ import print_function |
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| 160 | |
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[7891a2a] | 161 | # TODO: determine which functions are useful outside of generate |
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[69aa451] | 162 | #__all__ = ["model_info", "make_doc", "make_source", "convert_type"] |
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[5ceb7d0] | 163 | |
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| 164 | import sys |
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[7891a2a] | 165 | from os.path import abspath, dirname, join as joinpath, exists, isdir, getmtime |
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[5ceb7d0] | 166 | import re |
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| 167 | import string |
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[78d3341] | 168 | import warnings |
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[5ceb7d0] | 169 | |
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[7ae2b7f] | 170 | import numpy as np # type: ignore |
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[5ceb7d0] | 171 | |
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[6d6508e] | 172 | from .modelinfo import Parameter |
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[68e7f9d] | 173 | from .custom import load_custom_kernel_module |
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[fcd7bbd] | 174 | |
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[f619de7] | 175 | try: |
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[f2f67a6] | 176 | from typing import Tuple, Sequence, Iterator, Dict |
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[f619de7] | 177 | from .modelinfo import ModelInfo |
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| 178 | except ImportError: |
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| 179 | pass |
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| 180 | |
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[a5da1f2] | 181 | def get_data_path(external_dir, target_file): |
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| 182 | path = abspath(dirname(__file__)) |
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| 183 | if exists(joinpath(path, target_file)): |
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| 184 | return path |
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| 185 | |
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| 186 | # check next to exe/zip file |
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| 187 | exepath = dirname(sys.executable) |
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| 188 | path = joinpath(exepath, external_dir) |
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| 189 | if exists(joinpath(path, target_file)): |
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| 190 | return path |
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| 191 | |
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| 192 | # check in py2app Contents/Resources |
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| 193 | path = joinpath(exepath, '..', 'Resources', external_dir) |
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| 194 | if exists(joinpath(path, target_file)): |
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| 195 | return abspath(path) |
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| 196 | |
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| 197 | raise RuntimeError('Could not find '+joinpath(external_dir, target_file)) |
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| 198 | |
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| 199 | EXTERNAL_DIR = 'sasmodels-data' |
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| 200 | DATA_PATH = get_data_path(EXTERNAL_DIR, 'kernel_template.c') |
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[c2c51a2] | 201 | MODEL_PATH = joinpath(DATA_PATH, 'models') |
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[5ceb7d0] | 202 | |
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| 203 | F16 = np.dtype('float16') |
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| 204 | F32 = np.dtype('float32') |
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| 205 | F64 = np.dtype('float64') |
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| 206 | try: # CRUFT: older numpy does not support float128 |
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| 207 | F128 = np.dtype('float128') |
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| 208 | except TypeError: |
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| 209 | F128 = None |
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| 210 | |
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| 211 | # Conversion from units defined in the parameter table for each model |
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| 212 | # to units displayed in the sphinx documentation. |
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| 213 | RST_UNITS = { |
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| 214 | "Ang": "|Ang|", |
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| 215 | "1/Ang": "|Ang^-1|", |
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| 216 | "1/Ang^2": "|Ang^-2|", |
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| 217 | "1e-6/Ang^2": "|1e-6Ang^-2|", |
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| 218 | "degrees": "degree", |
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| 219 | "1/cm": "|cm^-1|", |
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| 220 | "Ang/cm": "|Ang*cm^-1|", |
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| 221 | "g/cm3": "|g/cm^3|", |
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| 222 | "mg/m2": "|mg/m^2|", |
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| 223 | "": "None", |
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| 224 | } |
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| 225 | |
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| 226 | # Headers for the parameters tables in th sphinx documentation |
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| 227 | PARTABLE_HEADERS = [ |
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| 228 | "Parameter", |
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| 229 | "Description", |
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| 230 | "Units", |
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| 231 | "Default value", |
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| 232 | ] |
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| 233 | |
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| 234 | # Minimum width for a default value (this is shorter than the column header |
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| 235 | # width, so will be ignored). |
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| 236 | PARTABLE_VALUE_WIDTH = 10 |
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| 237 | |
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| 238 | # Documentation header for the module, giving the model name, its short |
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| 239 | # description and its parameter table. The remainder of the doc comes |
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| 240 | # from the module docstring. |
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| 241 | DOC_HEADER = """.. _%(id)s: |
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| 242 | |
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| 243 | %(name)s |
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| 244 | ======================================================= |
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| 245 | |
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| 246 | %(title)s |
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| 247 | |
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| 248 | %(parameters)s |
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| 249 | |
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| 250 | %(returns)s |
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| 251 | |
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| 252 | %(docs)s |
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| 253 | """ |
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| 254 | |
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[7891a2a] | 255 | |
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[5ceb7d0] | 256 | def format_units(units): |
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[f619de7] | 257 | # type: (str) -> str |
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[5ceb7d0] | 258 | """ |
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| 259 | Convert units into ReStructured Text format. |
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| 260 | """ |
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| 261 | return "string" if isinstance(units, list) else RST_UNITS.get(units, units) |
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| 262 | |
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[7891a2a] | 263 | |
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[5ceb7d0] | 264 | def make_partable(pars): |
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[f619de7] | 265 | # type: (List[Parameter]) -> str |
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[5ceb7d0] | 266 | """ |
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| 267 | Generate the parameter table to include in the sphinx documentation. |
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| 268 | """ |
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| 269 | column_widths = [ |
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[fcd7bbd] | 270 | max(len(p.name) for p in pars), |
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| 271 | max(len(p.description) for p in pars), |
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| 272 | max(len(format_units(p.units)) for p in pars), |
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[5ceb7d0] | 273 | PARTABLE_VALUE_WIDTH, |
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| 274 | ] |
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| 275 | column_widths = [max(w, len(h)) |
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| 276 | for w, h in zip(column_widths, PARTABLE_HEADERS)] |
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| 277 | |
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| 278 | sep = " ".join("="*w for w in column_widths) |
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| 279 | lines = [ |
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| 280 | sep, |
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| 281 | " ".join("%-*s" % (w, h) |
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| 282 | for w, h in zip(column_widths, PARTABLE_HEADERS)), |
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| 283 | sep, |
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| 284 | ] |
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| 285 | for p in pars: |
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| 286 | lines.append(" ".join([ |
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[fcd7bbd] | 287 | "%-*s" % (column_widths[0], p.name), |
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| 288 | "%-*s" % (column_widths[1], p.description), |
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| 289 | "%-*s" % (column_widths[2], format_units(p.units)), |
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| 290 | "%*g" % (column_widths[3], p.default), |
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[5ceb7d0] | 291 | ])) |
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| 292 | lines.append(sep) |
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| 293 | return "\n".join(lines) |
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| 294 | |
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[7891a2a] | 295 | |
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[5ceb7d0] | 296 | def _search(search_path, filename): |
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[f619de7] | 297 | # type: (List[str], str) -> str |
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[5ceb7d0] | 298 | """ |
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| 299 | Find *filename* in *search_path*. |
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| 300 | |
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| 301 | Raises ValueError if file does not exist. |
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| 302 | """ |
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| 303 | for path in search_path: |
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| 304 | target = joinpath(path, filename) |
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| 305 | if exists(target): |
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| 306 | return target |
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| 307 | raise ValueError("%r not found in %s" % (filename, search_path)) |
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| 308 | |
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[d5ac45f] | 309 | |
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[17bbadd] | 310 | def model_sources(model_info): |
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[f619de7] | 311 | # type: (ModelInfo) -> List[str] |
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[5ceb7d0] | 312 | """ |
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| 313 | Return a list of the sources file paths for the module. |
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| 314 | """ |
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[7891a2a] | 315 | search_path = [dirname(model_info.filename), MODEL_PATH] |
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[6d6508e] | 316 | return [_search(search_path, f) for f in model_info.source] |
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[5ceb7d0] | 317 | |
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| 318 | |
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[69aa451] | 319 | def timestamp(model_info): |
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[f619de7] | 320 | # type: (ModelInfo) -> int |
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[69aa451] | 321 | """ |
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| 322 | Return a timestamp for the model corresponding to the most recently |
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| 323 | changed file or dependency. |
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[f2f67a6] | 324 | |
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| 325 | Note that this does not look at the time stamps for the OpenCL header |
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| 326 | information since that need not trigger a recompile of the DLL. |
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[69aa451] | 327 | """ |
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| 328 | source_files = (model_sources(model_info) |
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| 329 | + model_templates() |
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[6d6508e] | 330 | + [model_info.filename]) |
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[69aa451] | 331 | newest = max(getmtime(f) for f in source_files) |
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| 332 | return newest |
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| 333 | |
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[7891a2a] | 334 | |
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[f2f67a6] | 335 | def model_templates(): |
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| 336 | # type: () -> List[str] |
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| 337 | # TODO: fails DRY; templates appear two places. |
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| 338 | # should instead have model_info contain a list of paths |
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| 339 | # Note: kernel_iq.cl is not on this list because changing it need not |
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| 340 | # trigger a recompile of the dll. |
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[7891a2a] | 341 | return [joinpath(DATA_PATH, filename) |
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[f2f67a6] | 342 | for filename in ('kernel_header.c', 'kernel_iq.c')] |
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| 343 | |
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[5ceb7d0] | 344 | |
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| 345 | def convert_type(source, dtype): |
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[f619de7] | 346 | # type: (str, np.dtype) -> str |
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[5ceb7d0] | 347 | """ |
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| 348 | Convert code from double precision to the desired type. |
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| 349 | |
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| 350 | Floating point constants are tagged with 'f' for single precision or 'L' |
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| 351 | for long double precision. |
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| 352 | """ |
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| 353 | if dtype == F16: |
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| 354 | fbytes = 2 |
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[1e2a1ba] | 355 | source = _convert_type(source, "half", "f") |
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[5ceb7d0] | 356 | elif dtype == F32: |
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| 357 | fbytes = 4 |
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| 358 | source = _convert_type(source, "float", "f") |
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| 359 | elif dtype == F64: |
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| 360 | fbytes = 8 |
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[d5ac45f] | 361 | # no need to convert if it is already double |
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[5ceb7d0] | 362 | elif dtype == F128: |
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| 363 | fbytes = 16 |
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| 364 | source = _convert_type(source, "long double", "L") |
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| 365 | else: |
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[7891a2a] | 366 | raise ValueError("Unexpected dtype in source conversion: %s" % dtype) |
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| 367 | return ("#define FLOAT_SIZE %d\n" % fbytes)+source |
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[5ceb7d0] | 368 | |
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| 369 | |
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| 370 | def _convert_type(source, type_name, constant_flag): |
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[f619de7] | 371 | # type: (str, str, str) -> str |
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[5ceb7d0] | 372 | """ |
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| 373 | Replace 'double' with *type_name* in *source*, tagging floating point |
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| 374 | constants with *constant_flag*. |
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| 375 | """ |
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| 376 | # Convert double keyword to float/long double/half. |
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| 377 | # Accept an 'n' # parameter for vector # values, where n is 2, 4, 8 or 16. |
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| 378 | # Assume complex numbers are represented as cdouble which is typedef'd |
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| 379 | # to double2. |
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| 380 | source = re.sub(r'(^|[^a-zA-Z0-9_]c?)double(([248]|16)?($|[^a-zA-Z0-9_]))', |
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| 381 | r'\1%s\2'%type_name, source) |
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| 382 | # Convert floating point constants to single by adding 'f' to the end, |
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| 383 | # or long double with an 'L' suffix. OS/X complains if you don't do this. |
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| 384 | source = re.sub(r'[^a-zA-Z_](\d*[.]\d+|\d+[.]\d*)([eE][+-]?\d+)?', |
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| 385 | r'\g<0>%s'%constant_flag, source) |
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| 386 | return source |
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| 387 | |
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| 388 | |
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[17bbadd] | 389 | def kernel_name(model_info, is_2d): |
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[f619de7] | 390 | # type: (ModelInfo, bool) -> str |
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[5ceb7d0] | 391 | """ |
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| 392 | Name of the exported kernel symbol. |
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| 393 | """ |
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[6d6508e] | 394 | return model_info.name + "_" + ("Iqxy" if is_2d else "Iq") |
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[5ceb7d0] | 395 | |
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| 396 | |
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| 397 | def indent(s, depth): |
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[f619de7] | 398 | # type: (str, int) -> str |
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[5ceb7d0] | 399 | """ |
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| 400 | Indent a string of text with *depth* additional spaces on each line. |
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| 401 | """ |
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| 402 | spaces = " "*depth |
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| 403 | sep = "\n" + spaces |
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| 404 | return spaces + sep.join(s.split("\n")) |
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| 405 | |
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| 406 | |
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[f619de7] | 407 | _template_cache = {} # type: Dict[str, Tuple[int, str, str]] |
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[d5ac45f] | 408 | def load_template(filename): |
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[f619de7] | 409 | # type: (str) -> str |
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[7891a2a] | 410 | path = joinpath(DATA_PATH, filename) |
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[d5ac45f] | 411 | mtime = getmtime(path) |
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| 412 | if filename not in _template_cache or mtime > _template_cache[filename][0]: |
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| 413 | with open(path) as fid: |
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[303d8d6] | 414 | _template_cache[filename] = (mtime, fid.read(), path) |
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[da63656] | 415 | return _template_cache[filename][1], path |
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[d5ac45f] | 416 | |
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[303d8d6] | 417 | |
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[03cac08] | 418 | _FN_TEMPLATE = """\ |
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| 419 | double %(name)s(%(pars)s); |
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| 420 | double %(name)s(%(pars)s) { |
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[da63656] | 421 | #line %(line)d "%(filename)s" |
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[03cac08] | 422 | %(body)s |
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| 423 | } |
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| 424 | |
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| 425 | """ |
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[da63656] | 426 | def _gen_fn(name, pars, body, filename, line): |
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| 427 | # type: (str, List[Parameter], str, str, int) -> str |
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[5ceb7d0] | 428 | """ |
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[d5ac45f] | 429 | Generate a function given pars and body. |
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| 430 | |
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| 431 | Returns the following string:: |
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[5ceb7d0] | 432 | |
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[d5ac45f] | 433 | double fn(double a, double b, ...); |
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| 434 | double fn(double a, double b, ...) { |
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| 435 | .... |
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| 436 | } |
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[5ceb7d0] | 437 | """ |
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[60eab2a] | 438 | par_decl = ', '.join(p.as_function_argument() for p in pars) if pars else 'void' |
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[da63656] | 439 | return _FN_TEMPLATE % { |
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| 440 | 'name': name, 'pars': par_decl, 'body': body, |
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| 441 | 'filename': filename.replace('\\', '\\\\'), 'line': line, |
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| 442 | } |
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[d5ac45f] | 443 | |
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[17bbadd] | 444 | |
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[03cac08] | 445 | def _call_pars(prefix, pars): |
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[f619de7] | 446 | # type: (str, List[Parameter]) -> List[str] |
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[03cac08] | 447 | """ |
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| 448 | Return a list of *prefix.parameter* from parameter items. |
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| 449 | """ |
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[69aa451] | 450 | return [p.as_call_reference(prefix) for p in pars] |
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[d5ac45f] | 451 | |
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[17bbadd] | 452 | |
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[a738209] | 453 | # type in IQXY pattern could be single, float, double, long double, ... |
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| 454 | _IQXY_PATTERN = re.compile("^((inline|static) )? *([a-z ]+ )? *Iqxy *([(]|$)", |
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[03cac08] | 455 | flags=re.MULTILINE) |
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| 456 | def _have_Iqxy(sources): |
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[f619de7] | 457 | # type: (List[str]) -> bool |
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[03cac08] | 458 | """ |
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| 459 | Return true if any file defines Iqxy. |
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[d5ac45f] | 460 | |
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[03cac08] | 461 | Note this is not a C parser, and so can be easily confused by |
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| 462 | non-standard syntax. Also, it will incorrectly identify the following |
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| 463 | as having Iqxy:: |
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| 464 | |
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| 465 | /* |
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| 466 | double Iqxy(qx, qy, ...) { ... fill this in later ... } |
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| 467 | */ |
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| 468 | |
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| 469 | If you want to comment out an Iqxy function, use // on the front of the |
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| 470 | line instead. |
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| 471 | """ |
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[a738209] | 472 | for path, code in sources: |
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[03cac08] | 473 | if _IQXY_PATTERN.search(code): |
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| 474 | return True |
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| 475 | else: |
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| 476 | return False |
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[d5ac45f] | 477 | |
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[17bbadd] | 478 | |
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[da63656] | 479 | def _add_source(source, code, path): |
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| 480 | """ |
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| 481 | Add a file to the list of source code chunks, tagged with path and line. |
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| 482 | """ |
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[7891a2a] | 483 | path = path.replace('\\', '\\\\') |
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| 484 | source.append('#line 1 "%s"' % path) |
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[da63656] | 485 | source.append(code) |
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[5ceb7d0] | 486 | |
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[17bbadd] | 487 | |
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| 488 | def make_source(model_info): |
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[f619de7] | 489 | # type: (ModelInfo) -> str |
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[5ceb7d0] | 490 | """ |
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[17bbadd] | 491 | Generate the OpenCL/ctypes kernel from the module info. |
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| 492 | |
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[f619de7] | 493 | Uses source files found in the given search path. Returns None if this |
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| 494 | is a pure python model, with no C source components. |
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[5ceb7d0] | 495 | """ |
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[6d6508e] | 496 | if callable(model_info.Iq): |
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[f619de7] | 497 | raise ValueError("can't compile python model") |
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[17bbadd] | 498 | |
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[5ceb7d0] | 499 | # TODO: need something other than volume to indicate dispersion parameters |
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| 500 | # No volume normalization despite having a volume parameter. |
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| 501 | # Thickness is labelled a volume in order to trigger polydispersity. |
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| 502 | # May want a separate dispersion flag, or perhaps a separate category for |
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| 503 | # disperse, but not volume. Volume parameters also use relative values |
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| 504 | # for the distribution rather than the absolute values used by angular |
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| 505 | # dispersion. Need to be careful that necessary parameters are available |
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| 506 | # for computing volume even if we allow non-disperse volume parameters. |
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| 507 | |
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[6d6508e] | 508 | partable = model_info.parameters |
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[5ceb7d0] | 509 | |
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[03cac08] | 510 | # Load templates and user code |
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| 511 | kernel_header = load_template('kernel_header.c') |
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[f2f67a6] | 512 | dll_code = load_template('kernel_iq.c') |
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| 513 | ocl_code = load_template('kernel_iq.cl') |
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[ae2b6b5] | 514 | #ocl_code = load_template('kernel_iq_local.cl') |
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[da63656] | 515 | user_code = [(f, open(f).read()) for f in model_sources(model_info)] |
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[5ceb7d0] | 516 | |
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[03cac08] | 517 | # Build initial sources |
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[da63656] | 518 | source = [] |
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| 519 | _add_source(source, *kernel_header) |
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| 520 | for path, code in user_code: |
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| 521 | _add_source(source, code, path) |
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[5ceb7d0] | 522 | |
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[69aa451] | 523 | # Make parameters for q, qx, qy so that we can use them in declarations |
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| 524 | q, qx, qy = [Parameter(name=v) for v in ('q', 'qx', 'qy')] |
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[d5ac45f] | 525 | # Generate form_volume function, etc. from body only |
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[f619de7] | 526 | if isinstance(model_info.form_volume, str): |
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[d19962c] | 527 | pars = partable.form_volume_parameters |
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[da63656] | 528 | source.append(_gen_fn('form_volume', pars, model_info.form_volume, |
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| 529 | model_info.filename, model_info._form_volume_line)) |
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[f619de7] | 530 | if isinstance(model_info.Iq, str): |
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[d19962c] | 531 | pars = [q] + partable.iq_parameters |
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[da63656] | 532 | source.append(_gen_fn('Iq', pars, model_info.Iq, |
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| 533 | model_info.filename, model_info._Iq_line)) |
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[f619de7] | 534 | if isinstance(model_info.Iqxy, str): |
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[d19962c] | 535 | pars = [qx, qy] + partable.iqxy_parameters |
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[da63656] | 536 | source.append(_gen_fn('Iqxy', pars, model_info.Iqxy, |
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| 537 | model_info.filename, model_info._Iqxy_line)) |
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[d5ac45f] | 538 | |
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[03cac08] | 539 | # Define the parameter table |
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| 540 | source.append("#define PARAMETER_TABLE \\") |
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[69aa451] | 541 | source.append("\\\n".join(p.as_definition() |
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[d19962c] | 542 | for p in partable.kernel_parameters)) |
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[03cac08] | 543 | |
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| 544 | # Define the function calls |
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[d19962c] | 545 | if partable.form_volume_parameters: |
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[d2bb604] | 546 | refs = _call_pars("_v.", partable.form_volume_parameters) |
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[7891a2a] | 547 | call_volume = "#define CALL_VOLUME(_v) form_volume(%s)"%(",".join(refs)) |
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[d5ac45f] | 548 | else: |
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| 549 | # Model doesn't have volume. We could make the kernel run a little |
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| 550 | # faster by not using/transferring the volume normalizations, but |
---|
| 551 | # the ifdef's reduce readability more than is worthwhile. |
---|
[5ff1b03] | 552 | call_volume = "#define CALL_VOLUME(v) 1.0" |
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[03cac08] | 553 | source.append(call_volume) |
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| 554 | |
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[d2bb604] | 555 | refs = ["_q[_i]"] + _call_pars("_v.", partable.iq_parameters) |
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| 556 | call_iq = "#define CALL_IQ(_q,_i,_v) Iq(%s)" % (",".join(refs)) |
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[03cac08] | 557 | if _have_Iqxy(user_code): |
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| 558 | # Call 2D model |
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[f2f67a6] | 559 | refs = ["q[2*_i]", "q[2*_i+1]"] + _call_pars("_v.", partable.iqxy_parameters) |
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[d2bb604] | 560 | call_iqxy = "#define CALL_IQ(_q,_i,_v) Iqxy(%s)" % (",".join(refs)) |
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[03cac08] | 561 | else: |
---|
| 562 | # Call 1D model with sqrt(qx^2 + qy^2) |
---|
| 563 | warnings.warn("Creating Iqxy = Iq(sqrt(qx^2 + qy^2))") |
---|
| 564 | # still defined:: refs = ["q[i]"] + _call_pars("v", iq_parameters) |
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[d2bb604] | 565 | pars_sqrt = ["sqrt(_q[2*_i]*_q[2*_i]+_q[2*_i+1]*_q[2*_i+1])"] + refs[1:] |
---|
| 566 | call_iqxy = "#define CALL_IQ(_q,_i,_v) Iq(%s)" % (",".join(pars_sqrt)) |
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[03cac08] | 567 | |
---|
| 568 | # Fill in definitions for numbers of parameters |
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[d19962c] | 569 | source.append("#define MAX_PD %s"%partable.max_pd) |
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| 570 | source.append("#define NPARS %d"%partable.npars) |
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[03cac08] | 571 | |
---|
| 572 | # TODO: allow mixed python/opencl kernels? |
---|
| 573 | |
---|
[f2f67a6] | 574 | source.append("#if defined(USE_OPENCL)") |
---|
[da63656] | 575 | source.extend(_add_kernels(ocl_code[0], call_iq, call_iqxy, model_info.name)) |
---|
[f2f67a6] | 576 | source.append("#else /* !USE_OPENCL */") |
---|
[da63656] | 577 | source.extend(_add_kernels(dll_code[0], call_iq, call_iqxy, model_info.name)) |
---|
[f2f67a6] | 578 | source.append("#endif /* !USE_OPENCL */") |
---|
[03cac08] | 579 | return '\n'.join(source) |
---|
[5ceb7d0] | 580 | |
---|
[7891a2a] | 581 | |
---|
[f2f67a6] | 582 | def _add_kernels(kernel_code, call_iq, call_iqxy, name): |
---|
| 583 | # type: (str, str, str, str) -> List[str] |
---|
| 584 | source = [ |
---|
| 585 | # define the Iq kernel |
---|
| 586 | "#define KERNEL_NAME %s_Iq"%name, |
---|
| 587 | call_iq, |
---|
| 588 | kernel_code, |
---|
| 589 | "#undef CALL_IQ", |
---|
| 590 | "#undef KERNEL_NAME", |
---|
| 591 | |
---|
| 592 | # define the Iqxy kernel from the same source with different #defines |
---|
| 593 | "#define KERNEL_NAME %s_Iqxy"%name, |
---|
| 594 | call_iqxy, |
---|
| 595 | kernel_code, |
---|
| 596 | "#undef CALL_IQ", |
---|
| 597 | "#undef KERNEL_NAME", |
---|
| 598 | ] |
---|
| 599 | return source |
---|
| 600 | |
---|
[4d76711] | 601 | |
---|
[68e7f9d] | 602 | def load_kernel_module(model_name): |
---|
[f619de7] | 603 | # type: (str) -> module |
---|
[f2f67a6] | 604 | """ |
---|
| 605 | Return the kernel module named in *model_name*. |
---|
| 606 | |
---|
| 607 | If the name ends in *.py* then load it as a custom model using |
---|
| 608 | :func:`sasmodels.custom.load_custom_kernel_module`, otherwise |
---|
| 609 | load it from :mod:`sasmodels.models`. |
---|
| 610 | """ |
---|
[68e7f9d] | 611 | if model_name.endswith('.py'): |
---|
| 612 | kernel_module = load_custom_kernel_module(model_name) |
---|
| 613 | else: |
---|
| 614 | from sasmodels import models |
---|
| 615 | __import__('sasmodels.models.'+model_name) |
---|
| 616 | kernel_module = getattr(models, model_name, None) |
---|
| 617 | return kernel_module |
---|
| 618 | |
---|
[5ceb7d0] | 619 | |
---|
| 620 | section_marker = re.compile(r'\A(?P<first>[%s])(?P=first)*\Z' |
---|
[7891a2a] | 621 | % re.escape(string.punctuation)) |
---|
[5ceb7d0] | 622 | def _convert_section_titles_to_boldface(lines): |
---|
[f619de7] | 623 | # type: (Sequence[str]) -> Iterator[str] |
---|
[5ceb7d0] | 624 | """ |
---|
| 625 | Do the actual work of identifying and converting section headings. |
---|
| 626 | """ |
---|
| 627 | prior = None |
---|
| 628 | for line in lines: |
---|
| 629 | if prior is None: |
---|
| 630 | prior = line |
---|
| 631 | elif section_marker.match(line): |
---|
| 632 | if len(line) >= len(prior): |
---|
| 633 | yield "".join(("**", prior, "**")) |
---|
| 634 | prior = None |
---|
| 635 | else: |
---|
| 636 | yield prior |
---|
| 637 | prior = line |
---|
| 638 | else: |
---|
| 639 | yield prior |
---|
| 640 | prior = line |
---|
| 641 | if prior is not None: |
---|
| 642 | yield prior |
---|
| 643 | |
---|
[7891a2a] | 644 | |
---|
[5ceb7d0] | 645 | def convert_section_titles_to_boldface(s): |
---|
[f619de7] | 646 | # type: (str) -> str |
---|
[5ceb7d0] | 647 | """ |
---|
| 648 | Use explicit bold-face rather than section headings so that the table of |
---|
| 649 | contents is not polluted with section names from the model documentation. |
---|
| 650 | |
---|
| 651 | Sections are identified as the title line followed by a line of punctuation |
---|
| 652 | at least as long as the title line. |
---|
| 653 | """ |
---|
| 654 | return "\n".join(_convert_section_titles_to_boldface(s.split('\n'))) |
---|
| 655 | |
---|
[7891a2a] | 656 | |
---|
[17bbadd] | 657 | def make_doc(model_info): |
---|
[f619de7] | 658 | # type: (ModelInfo) -> str |
---|
[5ceb7d0] | 659 | """ |
---|
| 660 | Return the documentation for the model. |
---|
| 661 | """ |
---|
| 662 | Iq_units = "The returned value is scaled to units of |cm^-1| |sr^-1|, absolute scale." |
---|
| 663 | Sq_units = "The returned value is a dimensionless structure factor, $S(q)$." |
---|
[6d6508e] | 664 | docs = convert_section_titles_to_boldface(model_info.docs) |
---|
[a5b8477] | 665 | pars = make_partable(model_info.parameters.COMMON |
---|
| 666 | + model_info.parameters.kernel_parameters) |
---|
[6d6508e] | 667 | subst = dict(id=model_info.id.replace('_', '-'), |
---|
| 668 | name=model_info.name, |
---|
| 669 | title=model_info.title, |
---|
[a5b8477] | 670 | parameters=pars, |
---|
[6d6508e] | 671 | returns=Sq_units if model_info.structure_factor else Iq_units, |
---|
[5ceb7d0] | 672 | docs=docs) |
---|
| 673 | return DOC_HEADER % subst |
---|
| 674 | |
---|
| 675 | |
---|
[001d9f5] | 676 | def make_html(model_info): |
---|
| 677 | """ |
---|
| 678 | Convert model docs directly to html. |
---|
| 679 | """ |
---|
| 680 | from . import rst2html |
---|
| 681 | return rst2html.convert(make_doc(model_info), title=model_info['name']) |
---|
| 682 | |
---|
[5ceb7d0] | 683 | def demo_time(): |
---|
[f619de7] | 684 | # type: () -> None |
---|
[5ceb7d0] | 685 | """ |
---|
| 686 | Show how long it takes to process a model. |
---|
| 687 | """ |
---|
| 688 | import datetime |
---|
[6d6508e] | 689 | from .modelinfo import make_model_info |
---|
| 690 | from .models import cylinder |
---|
| 691 | |
---|
[5ceb7d0] | 692 | tic = datetime.datetime.now() |
---|
[17bbadd] | 693 | make_source(make_model_info(cylinder)) |
---|
[5ceb7d0] | 694 | toc = (datetime.datetime.now() - tic).total_seconds() |
---|
| 695 | print("time: %g"%toc) |
---|
| 696 | |
---|
[7891a2a] | 697 | |
---|
[5ceb7d0] | 698 | def main(): |
---|
[f619de7] | 699 | # type: () -> None |
---|
[5ceb7d0] | 700 | """ |
---|
| 701 | Program which prints the source produced by the model. |
---|
| 702 | """ |
---|
[d19962c] | 703 | import sys |
---|
[6d6508e] | 704 | from .modelinfo import make_model_info |
---|
| 705 | |
---|
[5ceb7d0] | 706 | if len(sys.argv) <= 1: |
---|
| 707 | print("usage: python -m sasmodels.generate modelname") |
---|
| 708 | else: |
---|
| 709 | name = sys.argv[1] |
---|
[68e7f9d] | 710 | kernel_module = load_kernel_module(name) |
---|
| 711 | model_info = make_model_info(kernel_module) |
---|
[17bbadd] | 712 | source = make_source(model_info) |
---|
[5ceb7d0] | 713 | print(source) |
---|
| 714 | |
---|
[7891a2a] | 715 | |
---|
[5ceb7d0] | 716 | if __name__ == "__main__": |
---|
| 717 | main() |
---|