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codegen.c
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codegen.c
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/*
MIT License
Copyright (c) 2019-2024 Don Cross <cosinekitty@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "novas.h"
#include "codegen.h"
#include "top2013.h"
#include "ephfile.h"
#include "gravsim/pluto_gravsim.h"
#define CG_MAX_LINE_LENGTH 200
#define MAX_DATA_PER_LINE 20
#define IAU_DATA_PER_ROW 11
#define IAU_DATA_NUM_ROWS 77
#define IAU_DATA_KEEP_ROWS 5
#define ADDSOL_DATA_PER_ROW 8
typedef struct
{
FILE *outfile;
cg_language_t language;
const char *datapath;
const char *verb;
const char *args;
const char *inFileName;
int lnum;
}
cg_context_t;
typedef int (* cg_directive_func) (cg_context_t *);
typedef struct
{
const char *verb;
cg_directive_func func;
}
cg_directive_entry;
static int ScanDirective(
char *line,
const char **verb_text,
const char **args_text,
const char **tail_text);
static int ProcessDirective(cg_context_t *context);
static int LogError(const cg_context_t *context, const char *format, ...);
static int ParseVsopBodyName(const cg_context_t *context, const char *name, vsop_body_t *body);
int GenerateCode(
cg_language_t language,
const char *outCodeFileName,
const char *inTemplateFileName,
const char *dataPath)
{
int error = 1;
cg_context_t context;
FILE *infile = NULL;
char line[CG_MAX_LINE_LENGTH];
const char *tail;
memset(&context, 0, sizeof(cg_context_t));
context.language = language;
context.inFileName = inTemplateFileName;
context.datapath = dataPath;
infile = fopen(inTemplateFileName, "rt");
if (infile == NULL)
{
fprintf(stderr, "GenerateCode: Cannot open input template file: %s\n", inTemplateFileName);
goto fail;
}
context.outfile = fopen(outCodeFileName, "wt");
if (context.outfile == NULL)
{
fprintf(stderr, "GenerateCode: Cannot open output file: %s\n", outCodeFileName);
goto fail;
}
for (context.lnum=1; fgets(line, sizeof(line), infile); ++context.lnum)
{
/* Look for $ASTRO_...(...)$ directives */
if (ScanDirective(line, &context.verb, &context.args, &tail))
{
fputs(line, context.outfile);
error = ProcessDirective(&context);
if (error) goto fail;
fputs(tail, context.outfile);
}
else
{
/* Not a directive, so copy to output verbatim. */
fputs(line, context.outfile);
}
}
error = 0;
fail:
if (infile != NULL) fclose(infile);
if (context.outfile != NULL) fclose(context.outfile);
if (error) remove(outCodeFileName);
return error;
}
static int IndexOf(const char *text, int offset, const char *pattern)
{
int i, j;
for (i=offset; text[i]; ++i)
{
for (j=0; pattern[j] && (pattern[j] == text[i+j]); ++j);
if (!pattern[j]) return i;
}
return -1;
}
static int ScanDirectiveVariant(
char *line,
const char **verb_text,
const char **args_text,
const char **tail_text,
const char *prefix)
{
static const char delim[] = "(";
static const char suffix[] = ")";
int prefix_length = (int)strlen(prefix);
int delim_length = (int)strlen(delim);
int suffix_length = (int)strlen(suffix);
int prefix_index, delim_index, suffix_index;
*verb_text = NULL;
*args_text = NULL;
*tail_text = NULL;
/*
Search for a directive anywhere in the line that looks like this:
$ASTRO_...(...)$
If that pattern is found, set *verb_text to point to the
reset of the verb after the prefix, set *args_text to the
string after the delimiter, and return 1.
*/
/* Search for the front of the directive in the line. */
prefix_index = IndexOf(line, 0, prefix);
if (prefix_index < 0)
return 0; /* Not found, so bail out. */
/* Search for the delimiter between the verb and the arguments. */
delim_index = IndexOf(line, prefix_index + prefix_length, delim);
if (delim_index < 0)
return 0; /* Not a pattern match, so bail out. */
/* Search for the arguments terminator. */
suffix_index = IndexOf(line, delim_index + delim_length, suffix);
if (suffix_index < 0)
return 0; /* Not a pattern match, so bail out. */
/* We have found a directive, so now we are allowed to change the contents of the line. */
line[prefix_index] = '\0'; /* terminate any leading text in the line */
line[delim_index] = '\0'; /* terminate the prefix string */
line[suffix_index] = '\0'; /* terminate the argument string */
/* skip over the "$ASTRO_" before the verb */
*verb_text = &line[prefix_index + prefix_length];
/* skip over the delimiter between the verb and the arguments */
*args_text = &line[delim_index + delim_length];
/* return a pointer to the part of the input line after the directive */
*tail_text = &line[suffix_index + suffix_length];
return 1;
}
static int ScanDirective(
char *line,
const char **verb_text,
const char **args_text,
const char **tail_text)
{
return
ScanDirectiveVariant(line, verb_text, args_text, tail_text, "//$ASTRO_") ||
ScanDirectiveVariant(line, verb_text, args_text, tail_text, "#$ASTRO_") ||
ScanDirectiveVariant(line, verb_text, args_text, tail_text, "$ASTRO_");
}
static int ParseVsopBodyName(const cg_context_t *context, const char *name, vsop_body_t *body)
{
if (!strcmp(name, "Sun")) { *body = VSOP_SUN; return 0; }
if (!strcmp(name, "Mercury")) { *body = VSOP_MERCURY; return 0; }
if (!strcmp(name, "Venus")) { *body = VSOP_VENUS; return 0; }
if (!strcmp(name, "EMB")) { *body = VSOP_EMB; return 0; }
if (!strcmp(name, "Earth")) { *body = VSOP_EARTH; return 0; }
if (!strcmp(name, "Mars")) { *body = VSOP_MARS; return 0; }
if (!strcmp(name, "Jupiter")) { *body = VSOP_JUPITER; return 0; }
if (!strcmp(name, "Saturn")) { *body = VSOP_SATURN; return 0; }
if (!strcmp(name, "Uranus")) { *body = VSOP_URANUS; return 0; }
if (!strcmp(name, "Neptune")) { *body = VSOP_NEPTUNE; return 0; }
*body = VSOP_INVALID_BODY;
return LogError(context, "Unknown VSOP body name '%s'", name);
}
static int ListVsop(cg_context_t *context)
{
int error;
const char *name;
vsop_body_t body;
vsop_model_t model;
int check_length;
int k, s, i;
char filename[100];
VsopInit(&model);
name = context->args;
error = ParseVsopBodyName(context, name, &body);
if (error) goto fail;
check_length = snprintf(filename, sizeof(filename), "%s/vsop_%d.txt", context->datapath, (int)body);
if (check_length < 0 || check_length != (int)strlen(filename))
{
error = LogError(context, "VSOP model filename is too long!");
goto fail;
}
error = VsopReadTrunc(&model, filename);
if (error) goto fail;
/* Represent the VSOP model using JavaScript syntax. */
fprintf(context->outfile, "[\n");
for (k=0; k < model.ncoords; ++k)
{
const vsop_formula_t *formula = &model.formula[k];
fprintf(context->outfile, " [\n");
for (s=0; s < formula->nseries_total; ++s)
{
const vsop_series_t *series = &formula->series[s];
fprintf(context->outfile, " [\n");
for (i=0; i < series->nterms_total; ++i)
{
const vsop_term_t *term = &series->term[i];
fprintf(context->outfile, " [%0.11lf, %0.11lf, %0.11lf]%s\n",
term->amplitude,
term->phase,
term->frequency,
(i+1 < series->nterms_total) ? "," : "");
}
fprintf(context->outfile, " ]%s\n", (s+1 < formula->nseries_total) ? "," : "");
}
fprintf(context->outfile, " ]%s\n", (k+1 < model.ncoords) ? "," : "");
}
fprintf(context->outfile, "]");
fail:
VsopFreeModel(&model);
return error;
}
static int PythonVsop(cg_context_t *context)
{
int error;
const char *name;
vsop_body_t body;
vsop_model_t model;
int check_length;
int k, s, i;
char filename[100];
VsopInit(&model);
name = context->args;
error = ParseVsopBodyName(context, name, &body);
if (error) goto fail;
check_length = snprintf(filename, sizeof(filename), "%s/vsop_%d.txt", context->datapath, (int)body);
if (check_length < 0 || check_length != (int)strlen(filename))
{
error = LogError(context, "VSOP model filename is too long!");
goto fail;
}
error = VsopReadTrunc(&model, filename);
if (error) goto fail;
fprintf(context->outfile, "_vsop_model_t( # %s\n", name);
for (k=0; k < model.ncoords; ++k)
{
const vsop_formula_t *formula = &model.formula[k];
fprintf(context->outfile, " _vsop_formula_t([\n");
for (s=0; s < formula->nseries_total; ++s)
{
const vsop_series_t *series = &formula->series[s];
fprintf(context->outfile, " _vsop_series_t([\n");
for (i=0; i < series->nterms_total; ++i)
{
const vsop_term_t *term = &series->term[i];
fprintf(context->outfile, " (%0.11lf, %0.11lf, %0.11lf)%s\n",
term->amplitude,
term->phase,
term->frequency,
(i+1 < series->nterms_total) ? "," : "");
}
fprintf(context->outfile, " ])%s\n", (s+1 < formula->nseries_total) ? "," : "");
}
fprintf(context->outfile, " ])%s\n", (k+1 < model.ncoords) ? "," : "");
}
fprintf(context->outfile, ")");
fail:
VsopFreeModel(&model);
return error;
}
static int CVsop_Series(cg_context_t *context, const vsop_series_t *series, const char *varprefix, int s)
{
int i;
if (series->nterms_total > 0)
{
fprintf(context->outfile, "static const vsop_term_t %s_%d[] =\n{\n", varprefix, s);
for (i = 0; i < series->nterms_total; ++i)
{
const vsop_term_t *term = &series->term[i];
fprintf(context->outfile, " { %0.11lf, %0.11lf, %0.11lf }%s\n",
term->amplitude,
term->phase,
term->frequency,
(i + 1 < series->nterms_total) ? "," : "");
}
fprintf(context->outfile, "};\n\n");
}
return 0;
}
static int CVsop_Formula(cg_context_t *context, const vsop_formula_t *formula, const char *coord_name, const char *body_name)
{
int error = 0;
int s;
char varprefix[100];
char sname[120];
snprintf(varprefix, sizeof(varprefix), "vsop_%s_%s", coord_name, body_name);
for (s=0; s < formula->nseries_total; ++s)
CHECK(CVsop_Series(context, &formula->series[s], varprefix, s));
fprintf(context->outfile, "static const vsop_series_t %s[] =\n{\n", varprefix);
for (s=0; s < formula->nseries_total; ++s)
{
if (formula->series[s].nterms_total == 0)
strcpy(sname, "NULL");
else
snprintf(sname, sizeof(sname), "%s_%d", varprefix, s);
fprintf(context->outfile, " { %d, %s }%s\n",
formula->series[s].nterms_total,
sname,
(s+1 < formula->nseries_total) ? "," : "");
}
fprintf(context->outfile, "};\n\n");
fail:
return error;
}
static int CVsop(cg_context_t *context)
{
int error;
const char *name;
vsop_body_t body;
vsop_model_t model;
int check_length;
int k;
char filename[100];
const char *coord_name[3] = { "lon", "lat", "rad" };
VsopInit(&model);
name = context->args;
CHECK(ParseVsopBodyName(context, name, &body));
check_length = snprintf(filename, sizeof(filename), "%s/vsop_%d.txt", context->datapath, (int)body);
if (check_length < 0 || check_length != (int)strlen(filename))
CHECK(LogError(context, "VSOP model filename is too long!"));
CHECK(VsopReadTrunc(&model, filename));
for (k=0; k < model.ncoords; ++k)
CHECK(CVsop_Formula(context, &model.formula[k], coord_name[k], name));
fail:
VsopFreeModel(&model);
return error;
}
static int CsharpVsop_Series(cg_context_t *context, const vsop_series_t *series, const char *varprefix, int s)
{
int i;
fprintf(context->outfile, " private static readonly vsop_term_t[] %s_%d = new vsop_term_t[]\n {\n", varprefix, s);
for (i = 0; i < series->nterms_total; ++i)
{
const vsop_term_t *term = &series->term[i];
fprintf(context->outfile, " new vsop_term_t(%0.11lf, %0.11lf, %0.11lf)%s\n",
term->amplitude,
term->phase,
term->frequency,
(i + 1 < series->nterms_total) ? "," : "");
}
fprintf(context->outfile, " };\n\n");
return 0;
}
static int CsharpVsop_Formula(cg_context_t *context, const vsop_formula_t *formula, const char *coord_name, const char *body_name)
{
int error = 0;
int s;
char varprefix[100];
char sname[120];
snprintf(varprefix, sizeof(varprefix), "vsop_%s_%s", coord_name, body_name);
for (s=0; s < formula->nseries_total; ++s)
CHECK(CsharpVsop_Series(context, &formula->series[s], varprefix, s));
fprintf(context->outfile, " private static readonly vsop_series_t[] %s = new vsop_series_t[]\n {\n", varprefix);
for (s=0; s < formula->nseries_total; ++s)
{
snprintf(sname, sizeof(sname), "%s_%d", varprefix, s);
fprintf(context->outfile, " new vsop_series_t(%s)%s\n",
sname,
(s+1 < formula->nseries_total) ? "," : "");
}
fprintf(context->outfile, " };\n\n");
fail:
return error;
}
static int CsharpVsop(cg_context_t *context)
{
int error;
const char *name;
vsop_body_t body;
vsop_model_t model;
int check_length;
int k;
char filename[100];
const char *coord_name[3] = { "lon", "lat", "rad" };
VsopInit(&model);
name = context->args;
CHECK(ParseVsopBodyName(context, name, &body));
check_length = snprintf(filename, sizeof(filename), "%s/vsop_%d.txt", context->datapath, (int)body);
if (check_length < 0 || check_length != (int)strlen(filename))
CHECK(LogError(context, "VSOP model filename is too long!"));
CHECK(VsopReadTrunc(&model, filename));
for (k=0; k < model.ncoords; ++k)
CHECK(CsharpVsop_Formula(context, &model.formula[k], coord_name[k], name));
fail:
VsopFreeModel(&model);
return error;
}
static int KotlinVsop_Series(cg_context_t *context, const vsop_series_t *series, const char *varprefix, int s)
{
int i;
fprintf(context->outfile, "private val %s%d = VsopSeries(arrayOf(\n", varprefix, s);
for (i = 0; i < series->nterms_total; ++i)
{
const vsop_term_t *term = &series->term[i];
fprintf(context->outfile, " VsopTerm(%0.11lf, %0.11lf, %0.11lf)%s\n",
term->amplitude,
term->phase,
term->frequency,
(i + 1 < series->nterms_total) ? "," : "");
}
fprintf(context->outfile, "))\n\n");
return 0;
}
static int KotlinVsop_Formula(cg_context_t *context, const vsop_formula_t *formula, const char *coord_name, const char *body_name)
{
int error = 0;
int s;
char varprefix[100];
char sname[120];
snprintf(varprefix, sizeof(varprefix), "vsop%s%s", coord_name, body_name);
for (s=0; s < formula->nseries_total; ++s)
CHECK(KotlinVsop_Series(context, &formula->series[s], varprefix, s));
fprintf(context->outfile, "private val %s = VsopFormula(arrayOf(\n", varprefix);
for (s=0; s < formula->nseries_total; ++s)
{
snprintf(sname, sizeof(sname), "%s%d", varprefix, s);
fprintf(context->outfile, " %s%s\n",
sname,
(s+1 < formula->nseries_total) ? "," : "");
}
fprintf(context->outfile, "))\n\n");
fail:
return error;
}
static int KotlinVsop(cg_context_t *context)
{
int error;
const char *name;
vsop_body_t body;
vsop_model_t model;
int check_length;
int k;
char filename[100];
const char *coord_name[3] = { "Lon", "Lat", "Rad" };
VsopInit(&model);
name = context->args;
CHECK(ParseVsopBodyName(context, name, &body));
check_length = snprintf(filename, sizeof(filename), "%s/vsop_%d.txt", context->datapath, (int)body);
if (check_length < 0 || check_length != (int)strlen(filename))
CHECK(LogError(context, "VSOP model filename is too long!"));
CHECK(VsopReadTrunc(&model, filename));
for (k=0; k < model.ncoords; ++k)
CHECK(KotlinVsop_Formula(context, &model.formula[k], coord_name[k], name));
fail:
VsopFreeModel(&model);
return error;
}
#define UDEF(expr) ((u = (expr)), (u2 = u*u), (u3 = u*u2), (u4 = u2*u2), (u5 = u2*u3), (u6 = u3*u3), (u7 = u3*u4))
double ExtrapolatedDeltaT(int year)
{
double dt=NAN, y;
double u, u2, u3, u4, u5, u6, u7;
/*
Fred Espenak writes about Delta-T generically here:
https://eclipse.gsfc.nasa.gov/SEhelp/deltaT.html
https://eclipse.gsfc.nasa.gov/SEhelp/deltat2004.html
He provides polynomial approximations for distant years here:
https://eclipse.gsfc.nasa.gov/SEhelp/deltatpoly2004.html
*/
y = (double)year + (0.5/12.0); /* Espenak's "decimal year" value y for January of the given year. */
if (year < -500)
{
u = (year - 1820.0) / 100.0;
dt = -20.0 + (32.0 * u*u);
}
else if (year < 500)
{
UDEF(y / 100.0);
dt = 10583.6 - 1014.41*u + 33.78311*u2 - 5.952053*u3
- 0.1798452*u4 + 0.022174192*u5 + 0.0090316521*u6;
}
else if (year < 1600)
{
UDEF((y - 1000.0) / 100.0);
dt = 1574.2 - 556.01*u + 71.23472*u2 + 0.319781*u3
- 0.8503463*u4 - 0.005050998*u5 + 0.0083572073*u6;
}
else if (year < 1700)
{
UDEF(y - 1600);
dt = 120 - 0.9808*u - 0.01532*u2 + u3/7129.0;
}
else if (year < 1800)
{
UDEF(y - 1700);
dt = 8.83 + 0.1603*u - 0.0059285*u2 + 0.00013336*u3 - u4/1174000;
}
else if (year < 1860)
{
UDEF(y - 1800);
dt = 13.72 - 0.332447*u + 0.0068612*u2 + 0.0041116*u3 - 0.00037436*u4
+ 0.0000121272*u5 - 0.0000001699*u6 + 0.000000000875*u7;
}
else if (year < 1900)
{
UDEF(y - 1860);
dt = 7.62 + 0.5737*u - 0.251754*u2 + 0.01680668*u3
-0.0004473624*u4 + u5/233174;
}
else if (year < 1920)
{
UDEF(y - 1900);
dt = -2.79 + 1.494119*u - 0.0598939*u2 + 0.0061966*u3 - 0.000197*u4;
}
else if (year < 1941)
{
UDEF(y - 1920);
dt = 21.20 + 0.84493*u - 0.076100*u2 + 0.0020936*u3;
}
else if (year < 1961)
{
UDEF(y - 1950);
dt = 29.07 + 0.407*u - u2/233 + u3/2547;
}
else if (year < 1986)
{
UDEF(y - 1975);
dt = 45.45 + 1.067*u - u2/260 - u3/718;
}
else if (year < 2005)
{
UDEF(y - 2000);
dt = 63.86 + 0.3345*u - 0.060374*u2 + 0.0017275*u3 + 0.000651814*u4
+ 0.00002373599*u5;
}
else if (year < 2050)
{
UDEF(y - 2000);
dt = 62.92 + 0.32217*u + 0.005589*u2;
}
else if (year < 2150)
{
u = (y-1820)/100;
dt = -20.0 + 32.0*u*u - 0.5628*(2150.0 - y);
}
else /* all years after 2150 */
{
u = (year - 1820.0) / 100.0;
dt = -20.0 + 32.0*u*u;
}
return dt;
}
static int ScanRealArray(
const cg_context_t *context,
const char *filename,
int lnum,
char *line,
int numExpected,
double *data)
{
int i, t, len, inspace;
char *token[MAX_DATA_PER_LINE];
if (numExpected < 1 || numExpected > MAX_DATA_PER_LINE)
return LogError(context, "Invalid value for numExpected=%d\n", numExpected);
/* Split the line into space delimited tokens. */
len = (int)strlen(line);
inspace = 1;
t = 0;
for (i=0; i < len; ++i)
{
if (line[i] == ' ' || line[i] == '\t' || line[i] == '\r' || line[i] == '\n')
{
if (!inspace)
{
line[i] = '\0'; /* terminate the previous token */
inspace = 1;
}
}
else
{
if (inspace)
{
/* we just found the beginning of a new token. */
if (t < IAU_DATA_PER_ROW)
{
token[t++] = &line[i];
inspace = 0;
}
else
return LogError(context, "ScanRealArray(%s %d): too many data on line.", filename, lnum);
}
}
}
/* Verify there are the correct number of tokens. */
if (t != numExpected)
return LogError(context, "ScanRealArray(%s %d): found %d data, but expected %d\n", filename, lnum, t, numExpected);
/* Parse each token as a floating point number. */
for (t=0; t < numExpected; ++t)
if (1 != sscanf(token[t], "%lf", &data[t]))
return LogError(context, "ScanRealArray(%s %d): invalid floating point token '%s'\n", filename, lnum, token[t]);
return 0; /* successful parse */
}
static int OptimizeConst(const cg_context_t *context, char *buffer, size_t size, double c, const char *v)
{
int nprinted;
const char *op;
if (c == 0.0)
{
buffer[0] = '\0';
return 0;
}
if (c < 0.0)
{
op = " - ";
c *= -1.0;
}
else
op = " + ";
if (c == 1.0)
nprinted = snprintf(buffer, size, "%s%s", op, v);
else
nprinted = snprintf(buffer, size, "%s%0.1lf*%s", op, c, v);
if (nprinted >= (int)size)
return LogError(context, "OptimizeConst: print buffer overflowed.");
return 0;
}
static int OptimizeLinear(const cg_context_t *context, char *buffer, size_t size, double a, double b)
{
int nprinted;
if (b == 0.0)
nprinted = snprintf(buffer, size, "%0.1lf", a);
else if (a == 0.0)
nprinted = snprintf(buffer, size, "%0.1lf*t", b);
else if (b < 0.0)
nprinted = snprintf(buffer, size, "%0.1lf - %0.1lf*t", a, -b);
else
nprinted = snprintf(buffer, size, "%0.1lf + %0.1lf*t", a, b);
if ((size_t)nprinted >= size)
return LogError(context, "OptimizeLinear: print buffer overflowed.");
return 0;
}
static int OptIauPython(cg_context_t *context, const double *data)
{
static const char * const nv[] = {"el", "elp", "f", "d", "om"}; /* variable names */
int first;
double n;
int i;
const char *op;
char dotprod[200];
char term[40];
char linear[100];
char cpart[100];
int nprinted;
int lonevar;
fprintf(context->outfile, "\n"); /* must start on new line to maintain correct indentation in Python source. */
/* Optimize dot product of data[0]..data[4] with nv[]. */
first = 1;
dotprod[0] = '\0';
for (i=0; i<5; ++i)
{
n = data[i];
if (n != 0.0)
{
if (n < 0.0)
{
n *= -1.0;
op = first ? "-" : " - ";
}
else
op = first ? "" : " + ";
if (n == 1.0)
nprinted = snprintf(term, sizeof(term), "%s%s", op, nv[i]);
else
nprinted = snprintf(term, sizeof(term), "%s%0.1lf*%s", op, n, nv[i]);
if (nprinted >= sizeof(term))
return LogError(context, "Truncated iau2000b term.");
if (nprinted + strlen(dotprod) >= sizeof(dotprod))
return LogError(context, "Dot product overflow in iau2000b formula.");
strcat(dotprod, term);
first = 0;
}
}
/* Did we print a lone variable, e.g. "elp"? */
lonevar = 0;
for (i=0; i<5 && !lonevar; ++i)
if (!strcmp(dotprod, nv[i]))
lonevar = 1;
if (lonevar)
{
fprintf(context->outfile, " sarg = math.sin(%s)\n", dotprod);
fprintf(context->outfile, " carg = math.cos(%s)\n", dotprod);
}
else
{
fprintf(context->outfile, " arg = %s\n", dotprod);
fprintf(context->outfile, " sarg = math.sin(arg)\n");
fprintf(context->outfile, " carg = math.cos(arg)\n");
}
if (OptimizeLinear(context, linear, sizeof(linear), data[5], data[6])) return 1;
if (OptimizeConst(context, cpart, sizeof(cpart), data[7], "carg")) return 1;
fprintf(context->outfile, " dp += (%s)*sarg%s\n", linear, cpart);
if (OptimizeLinear(context, linear, sizeof(linear), data[8], data[9])) return 1;
if (OptimizeConst(context, cpart, sizeof(cpart), data[10], "sarg")) return 1;
fprintf(context->outfile, " de += (%s)*carg%s\n", linear, cpart);
fprintf(context->outfile, "\n");
return 0;
}
static int OptIauC(cg_context_t *context, int lnum, const double *data)
{
int i;
fprintf(context->outfile, " { { %2.0lf", data[0]);
for (i=1; i < 5; ++i)
fprintf(context->outfile, ", %2.0lf", data[i]);
fprintf(context->outfile, " }, { %12.0lf", data[i]);
for (++i; i < 11; ++i)
fprintf(context->outfile, ", %12.0lf", data[i]);
fprintf(context->outfile, " } }");
if (lnum != IAU_DATA_KEEP_ROWS)
fprintf(context->outfile, ",");
fprintf(context->outfile, "\n");
return 0;
}
static int OptIauCsharp(cg_context_t *context, int lnum, const double *data)
{
int i;
fprintf(context->outfile, " new iau_row_t { nals0 = %2.0lf", data[0]);
for (i=1; i < 5; ++i)
fprintf(context->outfile, ", nals%d = %2.0lf", i, data[i]);
fprintf(context->outfile, " , cls%d = %12.0lf", i-5, data[i]);
for (++i; i < 11; ++i)
fprintf(context->outfile, ", cls%d = %12.0lf", i-5, data[i]);
fprintf(context->outfile, " }");
if (lnum != IAU_DATA_KEEP_ROWS)
fprintf(context->outfile, ",");
fprintf(context->outfile, "\n");
return 0;
}
static int OptIauJS(cg_context_t *context, int lnum, const double *data)
{
int i;
fprintf(context->outfile, " [ [ %2.0lf", data[0]);
for (i=1; i < 5; ++i)
fprintf(context->outfile, ", %2.0lf", data[i]);
fprintf(context->outfile, " ], [ %12.0lf", data[i]);
for (++i; i < 11; ++i)
fprintf(context->outfile, ", %12.0lf", data[i]);
fprintf(context->outfile, " ] ]");
if (lnum != IAU_DATA_KEEP_ROWS)
fprintf(context->outfile, ",");
fprintf(context->outfile, "\n");
return 0;
}
static int OptIauKotlin(cg_context_t *context, int lnum, const double *data)
{
int i;
fprintf(context->outfile, " IauRow(%2.0lf", data[0]);
for (i=1; i < 5; ++i)
fprintf(context->outfile, ", %2.0lf", data[i]);
fprintf(context->outfile, ", %12.1lf", data[i]);
for (++i; i < 11; ++i)
fprintf(context->outfile, ", %12.1lf", data[i]);
fprintf(context->outfile, ")");
if (lnum < IAU_DATA_KEEP_ROWS)
fprintf(context->outfile, ",\n");
else
fprintf(context->outfile, "\n");
return 0;
}
static int OptIauData(cg_context_t *context)
{
int error = 1;
int lnum;
FILE *infile;
const char *filename;
char line[100];
double data[IAU_DATA_PER_ROW];
filename = "model_data/iau2000b.txt";
infile = fopen(filename, "rt");
if (infile == NULL) goto fail;
fprintf(context->outfile, "\n");
lnum = 0;
while (fgets(line, sizeof(line), infile))
{
++lnum;
CHECK(ScanRealArray(context, filename, lnum, line, IAU_DATA_PER_ROW, data));
if (lnum <= IAU_DATA_KEEP_ROWS)
{
switch (context->language)
{
case CODEGEN_LANGUAGE_PYTHON:
CHECK(OptIauPython(context, data));
break;
case CODEGEN_LANGUAGE_C:
CHECK(OptIauC(context, lnum, data));
break;
case CODEGEN_LANGUAGE_CSHARP:
CHECK(OptIauCsharp(context, lnum, data));
break;
case CODEGEN_LANGUAGE_JS:
CHECK(OptIauJS(context, lnum, data));
break;
case CODEGEN_LANGUAGE_KOTLIN:
CHECK(OptIauKotlin(context, lnum, data));
break;
default:
CHECK(LogError(context, "OptIauData: Unsupported language %d", context->language));