Initial NLopt 2.7.1 import

.github/dependabot.yml

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+# Set update schedule for GitHub Actions
+
+version: 2
+updates:
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"

.github/workflows/tests.yml

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+name: tests
+
+on: [push, pull_request]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  testing:
+    name: testing-${{ matrix.toolchain }}-${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        toolchain:
+          - stable
+        os: 
+          - ubuntu-latest
+          - windows-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ matrix.toolchain }}
+          override: true
+
+      - name: Run cargo test in release mode
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --all --release

.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+/build

Cargo.toml

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+[package]
+authors = ["Remi Lafage <[email protected]>"]
+name = "slsqp"
+version = "0.0.1"
+edition = "2021"
+license-file = "LICENSE.md"
+description = "SLSQP optimizer for Rust"
+readme = "README.md"
+repository = "https://github.com/relf/slsqp/"
+keywords = ["optimizer", "optimization", "constrained", "derivative-free"]
+categories = ["algorithms", "api-bindings", "science"]
+documentation = "https://docs.rs/slsqp"
+
+[dependencies]
+libc = "0.2"
+argmin = "0.8.0"
+serde = "1"
+instant = "0.1"
+
+[dev-dependencies]
+approx = "0.5"

README.md

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+# slsqp
+
+[![tests](https://github.com/relf/slsqp/workflows/tests/badge.svg)](https://github.com/relf/slsqp/actions?query=workflow%3Atests)
+[![crates.io](https://img.shields.io/crates/v/slsqp)](https://crates.io/crates/slsqp)
+[![docs](https://docs.rs/slsqp/badge.svg)](https://docs.rs/slsqp)
+
+## slsqp 0.1.x
+
+Rust wrapper for SLSQP optimizer (SLSQP stands for ). 
+slsqp Rust code was generated from NLopt 2.7.1 slsqp C code thanks to c2rust trabspiler then
+manually edited to make it work.
+

slsqp/CMakeLists.txt

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+cmake_minimum_required (VERSION 3.0.0)
+project (slsqp)
+
+include (CheckIncludeFiles)
+include (CheckFunctionExists)
+include (CheckTypeSize)
+include (CheckCCompilerFlag)
+include (CheckCXXSymbolExists)
+include (CheckCSourceCompiles)
+include (CheckCXXCompilerFlag)
+include (CheckLibraryExists)
+
+check_include_file (getopt.h HAVE_GETOPT_H)
+check_include_file (unistd.h HAVE_UNISTD_H)
+check_include_file (stdint.h HAVE_STDINT_H)
+check_include_file (time.h HAVE_TIME_H)
+check_include_file (sys/time.h HAVE_SYS_TIME_H)
+if (HAVE_TIME_H AND HAVE_SYS_TIME_H)
+  set (TIME_WITH_SYS_TIME TRUE)
+endif ()
+check_function_exists (getpid HAVE_GETPID)
+check_function_exists (syscall HAVE_GETTID_SYSCALL)
+check_function_exists (isinf HAVE_ISINF)
+check_function_exists (isnan HAVE_ISNAN)
+check_function_exists (gettimeofday HAVE_GETTIMEOFDAY)
+check_function_exists (qsort_r HAVE_QSORT_R)
+check_function_exists (time HAVE_TIME)
+check_function_exists (copysign HAVE_COPYSIGN)
+check_function_exists (getopt HAVE_GETOPT)
+check_type_size ("uint32_t" SIZEOF_UINT32_T)
+set (HAVE_UINT32_T ${SIZEOF_UINT32_T})
+check_type_size ("unsigned int" SIZEOF_UNSIGNED_INT)
+check_type_size ("unsigned long" SIZEOF_UNSIGNED_LONG)
+
+check_library_exists ("m" sqrt "" HAVE_LIBM)
+if (HAVE_LIBM)
+  set (M_LIBRARY m)
+endif()
+
+configure_file (${CMAKE_CURRENT_SOURCE_DIR}/nlopt_config.h.in ${CMAKE_CURRENT_SOURCE_DIR}/nlopt_config.h IMMEDIATE)
+
+add_library (slsqp slsqp.c) 
+
+target_include_directories (slsqp PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}) 

slsqp/README.md

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+To generate compile commands json file required by c2rust in top directory
+
+> mkdir build
+> cd build
+> cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=1 ../slsqp
+> cp compile_commands.json ../slsqp/compile_commands.json
+
+Then rust generation from C
+
+> cd ../slsqp
+> c2rust transpile compile_commands.json 

slsqp/compile_commands.json

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+[
+{
+  "directory": "/home/rlafage/workspace/slsqp/build",
+  "command": "/usr/bin/cc  -I/home/rlafage/workspace/slsqp/slsqp    -o CMakeFiles/slsqp.dir/slsqp.c.o   -c /home/rlafage/workspace/slsqp/slsqp/slsqp.c",
+  "file": "/home/rlafage/workspace/slsqp/slsqp/slsqp.c"
+}
+]

slsqp/nlopt-util.h

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+/* Copyright (c) 2007-2014 Massachusetts Institute of Technology
+ *
+ * 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.
+ */
+
+#ifndef NLOPT_UTIL_H
+#define NLOPT_UTIL_H
+
+#include <stdlib.h>
+#include <stdarg.h>
+#include <math.h>
+#include "nlopt_config.h"
+
+#include "nlopt.h"
+
+/* workaround for Solaris + gcc 3.4.x bug (see configure.ac) */
+#if defined(__GNUC__) && defined(REPLACEMENT_HUGE_VAL)
+#  undef HUGE_VAL
+#  define HUGE_VAL REPLACEMENT_HUGE_VAL
+#endif
+
+#ifndef HAVE_COPYSIGN
+   /* not quite right for y == -0, but good enough for us */
+#  define copysign(x, y) ((y) < 0 ? -fabs(x) : fabs(x))
+#elif !defined(__cplusplus) && __STDC_VERSION__ < 199901
+extern double copysign(double x, double y); /* may not be declared in C89 */
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif                          /* __cplusplus */
+
+    int nlopt_isinf(double x);
+    int nlopt_isfinite(double x);
+    int nlopt_istiny(double x);
+    int nlopt_isnan(double x);
+
+/* re-entrant qsort, uses the BSD convention */
+    extern void nlopt_qsort_r(void *base_, size_t nmemb, size_t size, void *thunk, int (*compar) (void *, const void *, const void *));
+
+/* seconds timer */
+    extern double nlopt_seconds(void);
+    extern unsigned long nlopt_time_seed(void);
+
+/* pseudorandom number generation by Mersenne twister algorithm */
+    extern void nlopt_init_genrand(unsigned long s);
+    extern double nlopt_urand(double a, double b);
+    extern int nlopt_iurand(int n);
+    extern double nlopt_nrand(double mean, double stddev);
+
+/* Sobol' low-discrepancy-sequence generation */
+    typedef struct nlopt_soboldata_s *nlopt_sobol;
+    extern nlopt_sobol nlopt_sobol_create(unsigned sdim);
+    extern void nlopt_sobol_destroy(nlopt_sobol s);
+    extern void nlopt_sobol_next01(nlopt_sobol s, double *x);
+    extern void nlopt_sobol_next(nlopt_sobol s, double *x, const double *lb, const double *ub);
+    extern void nlopt_sobol_skip(nlopt_sobol s, unsigned n, double *x);
+
+/* stopping criteria */
+    typedef struct {
+        unsigned n;
+        double minf_max;
+        double ftol_rel;
+        double ftol_abs;
+        double xtol_rel;
+        const double *xtol_abs;
+        const double *x_weights;
+        int *nevals_p, maxeval;
+        double maxtime, start;
+        int *force_stop;
+        char **stop_msg;        /* pointer to msg string to update */
+    } nlopt_stopping;
+    extern int nlopt_stop_f(const nlopt_stopping * stop, double f, double oldf);
+    extern int nlopt_stop_ftol(const nlopt_stopping * stop, double f, double oldf);
+    extern int nlopt_stop_x(const nlopt_stopping * stop, const double *x, const double *oldx);
+    extern int nlopt_stop_dx(const nlopt_stopping * stop, const double *x, const double *dx);
+    extern int nlopt_stop_xs(const nlopt_stopping * stop, const double *xs, const double *oldxs, const double *scale_min, const double *scale_max);
+    extern int nlopt_stop_evals(const nlopt_stopping * stop);
+    extern int nlopt_stop_time_(double start, double maxtime);
+    extern int nlopt_stop_time(const nlopt_stopping * stop);
+    extern int nlopt_stop_evalstime(const nlopt_stopping * stop);
+    extern int nlopt_stop_forced(const nlopt_stopping * stop);
+
+/* like vsprintf, but reallocs p to whatever size is needed */
+    extern char *nlopt_vsprintf(char *p, const char *format, va_list ap);
+    extern void nlopt_stop_msg(const nlopt_stopping * s, const char *format, ...)
+#ifdef __GNUC__
+        __attribute__ ((format(printf, 2, 3)))
+#endif
+        ;
+
+/* for local optimizations, temporarily setting eval/time limits */
+    extern nlopt_result nlopt_optimize_limited(nlopt_opt opt, double *x, double *minf, int maxevals, double maxtime);
+
+/* data structure for nonlinear inequality or equality constraint
+   (f <= 0 or f = 0, respectively).  tol (>= 0) is a tolerance
+   that is used for stopping criteria -- the point is considered
+   "feasible" for purposes of stopping if the constraint is violated
+   by at most tol. */
+    typedef struct {
+        unsigned m;             /* dimensional of constraint: mf maps R^n -> R^m */
+        nlopt_func f;           /* one-dimensional constraint, requires m == 1 */
+        nlopt_mfunc mf;
+        nlopt_precond pre;      /* preconditioner for f (NULL if none or if mf) */
+        void *f_data;
+        double *tol;
+    } nlopt_constraint;
+
+    extern unsigned nlopt_count_constraints(unsigned p, const nlopt_constraint * c);
+    extern unsigned nlopt_max_constraint_dim(unsigned p, const nlopt_constraint * c);
+    extern void nlopt_eval_constraint(double *result, double *grad, const nlopt_constraint * c, unsigned n, const double *x);
+
+/* rescale.c: */
+    double *nlopt_compute_rescaling(unsigned n, const double *dx);
+    double *nlopt_new_rescaled(unsigned n, const double *s, const double *x);
+    void nlopt_rescale(unsigned n, const double *s, const double *x, double *xs);
+    void nlopt_unscale(unsigned n, const double *s, const double *x, double *xs);
+    void nlopt_reorder_bounds(unsigned n, double *lb, double *ub);
+
+#ifdef __cplusplus
+}                               /* extern "C" */
+#endif                          /* __cplusplus */
+#endif