static SEXP Julia_R_MD_NA_DataFrame(jl_value_t *Var)
{
SEXP ans, names, rownames;
char evalcmd[evalsize];
int i;
const char *dfname = "DataFrameName0tmp";
jl_set_global(jl_main_module, jl_symbol(dfname), (jl_value_t *)Var);
//Get Frame cols
snprintf(evalcmd, evalsize, "size(%s,2)", dfname);
jl_value_t *cols = jl_eval_string(evalcmd);
int collen = jl_unbox_long(cols);
jl_value_t *eachcolvector;
jl_value_t *coltype;
//Create VECSXP
//Create SEXP for Each Column and assign
PROTECT(ans = allocVector(VECSXP, collen));
for (i = 0; i < collen; i++)
{
snprintf(evalcmd, evalsize, "%s[%d]", dfname, i + 1);
eachcolvector = jl_eval_string(evalcmd);
snprintf(evalcmd, evalsize, "isa(%s[%d],PooledDataArray)", dfname, i + 1);
coltype = jl_eval_string(evalcmd);
if (jl_unbox_bool(coltype))
SET_VECTOR_ELT(ans, i, Julia_R_MD_NA_Factor(eachcolvector));
else
SET_VECTOR_ELT(ans, i, Julia_R_MD_NA(eachcolvector));
}
//set names attribute
snprintf(evalcmd, evalsize, "names(%s)", dfname);
jl_value_t *ret = jl_eval_string(evalcmd);
jl_value_t *onesymbol;
if (jl_is_array(ret))
{
PROTECT(names = allocVector(STRSXP, collen));
for (i = 0; i < jl_array_len(ret); i++)
{
onesymbol = jl_arrayref((jl_array_t *)ret, i);
if (jl_is_symbol(onesymbol))
SET_STRING_ELT(names, i, mkChar(((jl_sym_t *)onesymbol)->name));
}
setAttrib(ans, R_NamesSymbol, names);
UNPROTECT(1);
}
//set row names
snprintf(evalcmd, evalsize, "size(%s,1)", dfname);
jl_value_t *rows = jl_eval_string(evalcmd);
int rowlen = jl_unbox_long(rows);
PROTECT(rownames = allocVector(INTSXP, rowlen));
for (i = 0; i < rowlen; i++)
INTEGER(rownames)[i] = i + 1;
setAttrib(ans, R_RowNamesSymbol, rownames);
UNPROTECT(1);
//set class as data frame
setAttrib(ans, R_ClassSymbol, mkString("data.frame"));
//SET_OBJECT(ans, 1) ;
UNPROTECT(1);
return ans;
}
// argument is the usr/lib directory where libjulia is, or NULL to guess.
// if that doesn't work, try the full path to the "lib" directory that
// contains lib/julia/sys.ji
DLLEXPORT void jl_init(char *julia_home_dir)
{
libsupport_init();
char *image_file = jl_locate_sysimg(julia_home_dir);
julia_init(image_file);
jl_set_const(jl_core_module, jl_symbol("JULIA_HOME"),
jl_cstr_to_string(julia_home));
jl_module_export(jl_core_module, jl_symbol("JULIA_HOME"));
jl_eval_string("Base.reinit_stdio()");
jl_eval_string("Base.librandom_init()");
jl_eval_string("Base.init_sched()");
jl_eval_string("Base.init_head_sched()");
jl_eval_string("Base.init_load_path()");
}
// argument is the usr/lib directory where libjulia is, or NULL to guess.
// if that doesn't work, try the full path to the "lib" directory that
// contains lib/julia/sys.ji
DLLEXPORT void jl_init(char *julia_home_dir)
{
if (jl_is_initialized()) return;
libsupport_init();
char *image_file = jl_locate_sysimg(julia_home_dir, JL_SYSTEM_IMAGE_PATH);
julia_init(image_file);
jl_set_const(jl_core_module, jl_symbol("JULIA_HOME"),
jl_cstr_to_string(julia_home));
jl_module_export(jl_core_module, jl_symbol("JULIA_HOME"));
jl_eval_string("Base.reinit_stdio()");
jl_eval_string("Base.Random.librandom_init()");
jl_eval_string("Base.init_sched()");
jl_eval_string("Base.init_head_sched()");
jl_eval_string("Base.init_load_path()");
}
// First argument is the usr/lib directory where libjulia is, or NULL to guess.
// if that doesn't work, try the full path to the "lib" directory that
// contains lib/julia/sys.ji
// Second argument is the path of a system image file (*.ji) relative to the
// first argument path, or relative to the default julia home dir. The default
// is something like ../lib/julia/sys.ji
DLLEXPORT void jl_init_with_image(char *julia_home_dir, char *image_relative_path)
{
if (jl_is_initialized()) return;
libsupport_init();
if (image_relative_path == NULL)
image_relative_path = JL_SYSTEM_IMAGE_PATH;
char *image_file = jl_locate_sysimg(julia_home_dir, image_relative_path);
julia_init(image_file);
jl_set_const(jl_core_module, jl_symbol("JULIA_HOME"),
jl_cstr_to_string(julia_home));
jl_module_export(jl_core_module, jl_symbol("JULIA_HOME"));
jl_eval_string("Base.early_init()");
jl_eval_string("Base.init_head_sched()");
jl_eval_string("Base.init_load_path()");
jl_exception_clear();
}
// First argument is the usr/lib directory where libjulia is, or NULL to guess.
// if that doesn't work, try the full path to the "lib" directory that
// contains lib/julia/sys.ji
// Second argument is the path of a system image file (*.ji) relative to the
// first argument path, or relative to the default julia home dir. The default
// is something like ../lib/julia/sys.ji
DLLEXPORT void jl_init_with_image(const char *julia_home_dir, const char *image_relative_path)
{
if (jl_is_initialized()) return;
libsupport_init();
jl_compileropts.julia_home = julia_home_dir;
if (image_relative_path != NULL)
jl_compileropts.image_file = image_relative_path;
julia_init(JL_IMAGE_JULIA_HOME);
//TODO: these should be part of Multi.__init__()
//currently, we have them here since we may not want them
//getting unconditionally set from Base.__init__()
jl_eval_string("Base.init_parallel()");
jl_eval_string("Base.init_bind_addr(ARGS)");
jl_eval_string("Base.init_head_sched()");
jl_exception_clear();
}
int square(double a[],double b[])
{
// Init Julia
jl_init_with_image("/Users/fgans/julia/julia-4d1b751dda/lib/julia", "sys.ji");
JL_SET_STACK_BASE;
// Define Array Type for 1D Array
jl_value_t* array_type = jl_apply_array_type(jl_float64_type, 1);
// Connect C-Arrays to julia Arrays
jl_array_t *a_jl = jl_ptr_to_array_1d(array_type, a, 1, 0);
jl_array_t *b_jl = jl_ptr_to_array_1d(array_type, b, 1, 0);
// Load julia code
jl_eval_string("include(\"square.jl\")");
// Get function
jl_function_t *func = jl_get_function(jl_main_module, "square");
if (func==NULL) {
printf("Function not found!\n");
return -1;
}
// Apply function
jl_call2(func, (jl_value_t*)a_jl,(jl_value_t*)b_jl);
if (jl_exception_occurred()) printf("%s \n", jl_typeof_str(jl_exception_occurred()));
return 0;
}
DLLEXPORT const char *jlapi_get_stdout() {
jl_value_t *out;
if(strcmp(jlapi_mode,"rcqls")==0) {
out=jl_eval_string("seek(STDOUT, 0);jl4rb_out = takebuf_string(STDOUT);truncate(STDOUT, 0);jl4rb_out");
return jl_bytestring_ptr(out);
} else return "";
}
//basically factor in R is 1-dim INTSXP and contain levels
static jl_value_t *TransArrayToPoolDataArray(jl_array_t *mArray, jl_array_t *mpoolArray, size_t len, const char *VarName)
{
char evalcmd[evalsize];
jl_set_global(jl_main_module, jl_symbol("varpools"), (jl_value_t *)mpoolArray);
jl_set_global(jl_main_module, jl_symbol("varrefs"), (jl_value_t *)mArray);
snprintf(evalcmd, evalsize, "%s=PooledDataArray(ASCIIString,Uint32,%d)", VarName, len);
jl_eval_string(evalcmd);
snprintf(evalcmd, evalsize, "%s.pool=%s", VarName, "varpools");
jl_eval_string(evalcmd);
snprintf(evalcmd, evalsize, "%s.refs=%s", VarName, "varrefs");
jl_eval_string(evalcmd);
jl_value_t *ret = jl_eval_string((char *)VarName);
if (jl_exception_occurred())
{
jl_show(jl_stderr_obj(), jl_exception_occurred());
Rprintf("\n");
jl_exception_clear();
return (jl_value_t *) jl_nothing;
}
return ret;
}
//try load julia DataArrays and DataFrames packages
SEXP Julia_LoadDataArrayFrame()
{
jl_eval_string("using DataArrays,DataFrames");
if (jl_exception_occurred())
{
jl_show(jl_stderr_obj(), jl_exception_occurred());
Rprintf("\n");
jl_exception_clear();
}
else
DataArrayFrameInited = 1;
return R_NilValue;
}
static SEXP Julia_R_MD_NA_Factor(jl_value_t *Var)
{
SEXP ans = R_NilValue;
char *strData = "Varname0tmp.refs";
char *strlevels = "VarPools=Array(ASCIIString,length(Varname0tmp.pool))\r\n"
"for i in 1:length(Varname0tmp.pool)\r\n"
"VarPools[i]=string(Varname0tmp.pool[i])\r\n"
"end\r\n"
"VarPools\r\n";
jl_set_global(jl_main_module, jl_symbol("Varname0tmp"), (jl_value_t *)Var);
jl_value_t *retData = jl_eval_string(strData);
jl_value_t *retlevels = jl_eval_string(strlevels);
//first get refs data,dims=n
//caution this convert to int32 SEXP,it should be ok in reality,
//but if have a lot factor may be cause int32 overrun.
ans = Julia_R_MD_INT(retData);
PROTECT(ans);
//second setAttrib R levels and class
SEXP levels = Julia_R_MD(retlevels);
setAttrib(ans, R_LevelsSymbol, levels);
setAttrib(ans, R_ClassSymbol, mkString("factor"));
UNPROTECT(1);
return ans;
}
//first pass creat array then convert it to DataArray
//second pass assign NA to element
static jl_value_t *TransArrayToDataArray(jl_array_t *mArray, jl_array_t *mboolArray, const char *VarName)
{
char evalcmd[evalsize];
jl_set_global(jl_main_module, jl_symbol("TransVarName"), (jl_value_t *)mArray);
jl_set_global(jl_main_module, jl_symbol("TransVarNamebool"), (jl_value_t *)mboolArray);
snprintf(evalcmd, evalsize, "%s=DataArray(TransVarName,TransVarNamebool)", VarName);
jl_value_t *ret = jl_eval_string(evalcmd);
if (jl_exception_occurred())
{
jl_show(jl_stderr_obj(), jl_exception_occurred());
Rprintf("\n");
jl_exception_clear();
return (jl_value_t *) jl_nothing;
}
return ret;
}
static jl_value_t *R_Julia_MD_NA_DataFrame(SEXP Var, const char *VarName)
{
SEXP names = getAttrib(Var, R_NamesSymbol);
size_t len = LENGTH(Var);
if (TYPEOF(Var) != VECSXP || len == 0 || names == R_NilValue)
return (jl_value_t *) jl_nothing;
char evalcmd[evalsize];
char eltcmd[eltsize];
const char *onename;
SEXP elt;
for (size_t i = 0; i < len; i++)
{
snprintf(eltcmd, eltsize, "%sdfelt%d", VarName, i + 1);
elt = VECTOR_ELT(Var, i);
//vector is factor or not
if (getAttrib(elt, R_LevelsSymbol) != R_NilValue)
R_Julia_MD_NA_Factor(elt, eltcmd);
else
R_Julia_MD_NA(elt, eltcmd);
onename = CHAR(STRING_ELT(names, i));
if (i == 0)
snprintf(evalcmd, evalsize, "%s=DataFrame(%s =%s)", VarName, onename, eltcmd);
else
snprintf(evalcmd, evalsize, "%s[symbol(\"%s\")]=%s", VarName, onename, eltcmd);
//Rprintf("%s\n",evalcmd);
jl_eval_string(evalcmd);
if (jl_exception_occurred())
{
jl_show(jl_stderr_obj(), jl_exception_occurred());
Rprintf("\n");
jl_exception_clear();
return (jl_value_t *) jl_nothing;
}
}
return (jl_value_t *) jl_nothing;;
}
void SqwJl::SetVars(const std::vector<SqwBase::t_var>& vecVars)
{
if(!m_bOk)
{
tl::log_err("Julia interpreter has not initialised, cannot set variables.");
return;
}
std::ostringstream ostrEval;
for(const SqwBase::t_var& var : vecVars)
{
const std::string& strName = std::get<0>(var);
const std::string& strType = std::get<1>(var);
const std::string& strValue = std::get<2>(var);
if(!strName.length()) continue;
ostrEval << strName << " = ";
if(strType.length())
{
// if a type is given, filter out some names
if(strType[0] == '#' || strType == "Module")
continue;
// with cast
ostrEval << strType << "(" << strValue << ");\n";
}
else
{
//without cast
ostrEval << strValue << ";\n";
}
}
jl_eval_string(ostrEval.str().c_str());
}
static NOINLINE int true_main(int argc, char *argv[])
{
if (jl_core_module != NULL) {
jl_array_t *args = (jl_array_t*)jl_get_global(jl_core_module, jl_symbol("ARGS"));
if (args == NULL) {
args = jl_alloc_cell_1d(0);
JL_GC_PUSH1(&args);
jl_set_const(jl_core_module, jl_symbol("ARGS"), (jl_value_t*)args);
JL_GC_POP();
}
assert(jl_array_len(args) == 0);
jl_array_grow_end(args, argc);
int i;
for (i=0; i < argc; i++) {
jl_value_t *s = (jl_value_t*)jl_cstr_to_string(argv[i]);
jl_set_typeof(s,jl_utf8_string_type);
jl_arrayset(args, s, i);
}
}
jl_function_t *start_client = jl_base_module ?
(jl_function_t*)jl_get_global(jl_base_module, jl_symbol("_start")) : NULL;
if (start_client) {
jl_apply(&start_client, 1);
return 0;
}
// run program if specified, otherwise enter REPL
if (argc > 0) {
if (strcmp(argv[0], "-")) {
return exec_program(argv[0]);
}
}
ios_puts("WARNING: Base._start not defined, falling back to economy mode repl.\n", ios_stdout);
if (!jl_errorexception_type)
ios_puts("WARNING: jl_errorexception_type not defined; any errors will be fatal.\n", ios_stdout);
while (!ios_eof(ios_stdin)) {
char *volatile line = NULL;
JL_TRY {
ios_puts("\njulia> ", ios_stdout);
ios_flush(ios_stdout);
line = ios_readline(ios_stdin);
jl_value_t *val = (jl_value_t*)jl_eval_string(line);
if (jl_exception_occurred()) {
jl_printf(JL_STDERR, "error during run:\n");
jl_static_show(JL_STDERR, jl_exception_in_transit);
jl_exception_clear();
}
else if (val) {
jl_static_show(JL_STDOUT, val);
}
jl_printf(JL_STDOUT, "\n");
free(line);
line = NULL;
uv_run(jl_global_event_loop(),UV_RUN_NOWAIT);
}
JL_CATCH {
if (line) {
free(line);
line = NULL;
}
jl_printf(JL_STDERR, "\nparser error:\n");
jl_static_show(JL_STDERR, jl_exception_in_transit);
jl_printf(JL_STDERR, "\n");
jlbacktrace();
}
}
return 0;
}
void td_jl_eval(td_val_t *out, char *str)
{
jl_value_t *v = jl_eval_string(str);
to_td_val(out, v);
}
static SEXP Julia_R_MD_NA(jl_value_t *Var)
{
SEXP ans = R_NilValue;
char *strData = "Varname0tmp.data";
char *strNA = "bitunpack(Varname0tmp.na)";
jl_set_global(jl_main_module, jl_symbol("Varname0tmp"), (jl_value_t *)Var);
jl_value_t *retData = jl_eval_string(strData);
jl_value_t *retNA = jl_eval_string(strNA);
jl_value_t *val;
if (((jl_array_t *)retData)->ptrarray)
val = jl_cellref(retData, 0);
else
val = jl_arrayref((jl_array_t *)retData, 0);
int len = jl_array_len(retData);
if (len == 0)
return ans;
int ndims = jl_array_ndims(retData);
SEXP dims;
PROTECT(dims = allocVector(INTSXP, ndims));
for (size_t i = 0; i < ndims; i++)
INTEGER(dims)[i] = jl_array_dim(retData, i);
UNPROTECT(1);
//bool array
char *pNA = (char *) jl_array_data(retNA);
if (jl_is_bool(val))
{
char *p = (char *) jl_array_data(retData);
PROTECT(ans = allocArray(LGLSXP, dims));
for (size_t i = 0; i < len; i++)
if (pNA[i])
LOGICAL(ans)[i] = NA_LOGICAL;
else
LOGICAL(ans)[i] = p[i];
UNPROTECT(1);
}
else if (jl_is_int32(val))
{
int32_t *p = (int32_t *) jl_array_data(retData);
jlint_to_r_na;
}
//int64
else if (jl_is_int64(val))
{
int64_t *p = (int64_t *) jl_array_data(retData);
jlbiggerint_to_r_na;
}
//more integer type
else if (jl_is_int8(val))
{
int8_t *p = (int8_t *) jl_array_data(retData);
jlint_to_r_na;
}
else if (jl_is_int16(val))
{
int16_t *p = (int16_t *) jl_array_data(retData);
jlint_to_r_na;
}
else if (jl_is_uint8(val))
{
uint8_t *p = (uint8_t *) jl_array_data(retData);
jlint_to_r_na;
}
else if (jl_is_uint16(val))
{
uint16_t *p = (uint16_t *) jl_array_data(retData);
jlint_to_r_na;
}
else if (jl_is_uint32(val))
{
uint32_t *p = (uint32_t *) jl_array_data(retData);
jlbiggerint_to_r_na;
}
else if (jl_is_uint64(val))
{
uint64_t *p = (uint64_t *) jl_array_data(retData);
jlbiggerint_to_r_na;
}
//double
else if (jl_is_float64(val))
{
double *p = (double *) jl_array_data(retData);
jlfloat_to_r_na;
}
else if (jl_is_float32(val))
{
float *p = (float *) jl_array_data(retData);
jlfloat_to_r_na;
}
//convert string array to STRSXP
else if (jl_is_utf8_string(val))
{
PROTECT(ans = allocArray(STRSXP, dims));
for (size_t i = 0; i < len; i++)
if (pNA[i])
SET_STRING_ELT(ans, i, NA_STRING);
else
SET_STRING_ELT(ans, i, mkCharCE(jl_string_data(jl_cellref(retData, i)), CE_UTF8));
UNPROTECT(1);
}
else if (jl_is_ascii_string(val))
{
PROTECT(ans = allocArray(STRSXP, dims));
for (size_t i = 0; i < len; i++)
if (pNA[i])
SET_STRING_ELT(ans, i, NA_STRING);
else
SET_STRING_ELT(ans, i, mkChar(jl_string_data(jl_cellref(retData, i))));
UNPROTECT(1);
}
return ans;
}
//-| mode=="rcqls" is for rcqls development, mode="tty" is for initialization of STDOUT, STDERR with C API)
//-| other value of mode mean standard jlapi.c
DLLEXPORT void jlapi_init(char *julia_home_dir, char* mode) {
libsupport_init();
char *image_file = jl_locate_sysimg(julia_home_dir);
printf("image-file=%s\n",image_file);
julia_init(image_file);
jlapi_mode=mode;
jl_set_const(jl_core_module, jl_symbol("JULIA_HOME"),
jl_cstr_to_string(julia_home));
jl_module_export(jl_core_module, jl_symbol("JULIA_HOME"));
//-| This avoid LD_PRELOAD on linux since shared objects not exported
//-| Maybe fix this in a better way with options compilation.
char julia_api_libname[512];
#if defined(_OS_WINDOWS_)
const char *shlib_ext=".dll";
const char *sep="\\";
#elif defined(__APPLE__)
const char *shlib_ext=".dylib";
const char *sep="/";
#else
const char *shlib_ext=".so";
const char *sep="/";
#endif
snprintf(julia_api_libname, sizeof(julia_api_libname), "%s%s%s%s%s%s",
julia_home_dir, sep,"julia",sep,"libjulia-api",shlib_ext);
load_library_permanently(julia_api_libname);
if(strcmp(mode,"rcqls")<=0) { // cqls, rcqls
//-| Called first to fix the DL_LOAD_PATH needed to (dl)open library (libpcre for example)
//-| Replacement of Base.init_load_path()
//-| Update 01/08/2013: No need to set DL_LOAD_PATH, just push
//-| jl_set_global(jl_base_module,jl_symbol("DL_LOAD_PATH"),jl_eval_string("ByteString[join([JULIA_HOME,\"..\",\"lib\",\"julia\"],Base.path_separator)]"));
jl_eval_string("Base.push!(DL_LOAD_PATH,join([JULIA_HOME,\"..\",\"lib\",\"julia\"],Base.path_separator))");
//-| DL_LOAD_PATH is a global constant already defined before and then not overloaded by julia
//-| Only LOAD_PATH would be initialized (needs libpcre because of abspath)!
jl_eval_string("vers = \"v$(VERSION.major).$(VERSION.minor)\"");
jl_set_global(jl_base_module,jl_symbol("LOAD_PATH"),jl_eval_string("ByteString[abspath(JULIA_HOME,\"..\",\"local\",\"share\",\"julia\",\"site\",vers),abspath(JULIA_HOME,\"..\",\"share\",\"julia\",\"site\",vers)]"));
} else jl_eval_string("Base.init_load_path()");
if(strcmp(mode,"tty")==0) {
jl_eval_string("Base.reinit_stdio()");
jl_set_global(jl_base_module,jl_symbol("STDIN"),jl_eval_string("Base.init_stdio(ccall(:jl_stdin_stream ,Ptr{Void},()),0)"));
//-| 2 next lines fails even it is if no more necessary
//-| Update 27/07/13: no more crash but stuck when print.
jl_set_global(jl_base_module,jl_symbol("STDOUT"),jl_eval_string("Base.init_stdio(ccall(:jl_stdout_stream,Ptr{Void},()),1)"));
jl_set_global(jl_base_module,jl_symbol("STDERR"),jl_eval_string("Base.init_stdio(ccall(:jl_stderr_stream,Ptr{Void},()),2)"));
} else if(strcmp(mode,"rcqls")<=0) { //cqls, rcqls
jl_eval_string("Base.reinit_stdio()");
//-| STDIN, STDOUT and STDERR not properly loaded
//-| I prefer redirection of STDOUT and STDERR in IOBuffer (maybe STDIN ???)
jl_set_global(jl_base_module,jl_symbol("STDIN"),jl_eval_string("Base.init_stdio(ccall(:jl_stdin_stream ,Ptr{Void},()),0)"));
//jl_set_global(jl_base_module,jl_symbol("STDIN"),jl_eval_string("IOBuffer()"));
jl_set_global(jl_base_module,jl_symbol("STDOUT"),jl_eval_string("IOBuffer()"));
jl_set_global(jl_base_module,jl_symbol("STDERR"),jl_eval_string("IOBuffer()"));
} else jl_eval_string("Base.reinit_stdio()");
jl_eval_string("Base.fdwatcher_reinit()");
jl_eval_string("Base.Random.librandom_init()");
jl_eval_string("Base.check_blas()");
jl_eval_string("LinAlg.init()");
jl_eval_string("Sys.init()");
jl_eval_string("Base.init_sched()");
jl_eval_string("Base.init_head_sched()");
jl_eval_string("Base.try_include(abspath(ENV[\"HOME\"],\".juliarc.jl\"))");
if(strcmp(mode,"rcqls")==0) {
jl_eval_string("println(\"Julia initialized!\")");
jlapi_print_stdout();
}
}
int main()
{
jl_init(NULL);
{
// Simple running Julia code
jl_eval_string("println(sqrt(2.0))");
}
{
// Accessing the return value
jl_value_t *ret = jl_eval_string("sqrt(2.0)");
if (jl_is_float64(ret)) {
double retDouble = jl_unbox_float64(ret);
printf("sqrt(2.0) in C: %e\n", retDouble);
}
}
{
// Same as above but with function handle (more flexible)
jl_function_t *func = jl_get_function(jl_base_module, "sqrt");
jl_value_t* argument = jl_box_float64(2.0);
jl_value_t* ret = jl_call1(func, argument);
if (jl_is_float64(ret)) {
double retDouble = jl_unbox_float64(ret);
printf("sqrt(2.0) in C: %e\n", retDouble);
}
}
{
// 1D arrays
jl_value_t* array_type = jl_apply_array_type( jl_float64_type, 1 );
jl_array_t* x = jl_alloc_array_1d(array_type , 10);
JL_GC_PUSH1(&x);
double* xData = jl_array_data(x);
size_t i;
for(i=0; i<jl_array_len(x); i++)
xData[i] = i;
jl_function_t *func = jl_get_function(jl_base_module, "reverse!");
jl_call1(func, (jl_value_t*) x);
printf("x = [");
for(i=0; i<jl_array_len(x); i++)
printf("%e ", xData[i]);
printf("]\n");
JL_GC_POP();
}
{
// define julia function and call it
jl_eval_string("my_func(x) = 2*x");
jl_function_t *func = jl_get_function(jl_current_module, "my_func");
jl_value_t* arg = jl_box_float64(5.0);
double ret = jl_unbox_float64(jl_call1(func, arg));
printf("my_func(5.0) = %f\n", ret);
}
{
// call c function
jl_eval_string("println( ccall( :my_c_sqrt, Float64, (Float64,), 2.0 ) )");
}
{
// check for exceptions
jl_eval_string("this_function_does_not_exist()");
if (jl_exception_occurred()) {
jl_show(jl_stderr_obj(), jl_exception_occurred());
jl_printf(jl_stderr_stream(), "\n");
}
}
jl_atexit_hook();
return 0;
}