simplex-glpk with modified glpk for fpgaHEADmaster

1 files changed, 198 insertions, 0 deletions

diff --git a/glpk-5.0/src/env/error.c b/glpk-5.0/src/env/error.c
new file mode 100644
index 0000000..a704c5b
--- /dev/null
+++ b/glpk-5.0/src/env/error.c
@@ -0,0 +1,198 @@
+/* error.c (error handling) */
+
+/***********************************************************************
+*  This code is part of GLPK (GNU Linear Programming Kit).
+*  Copyright (C) 2000-2015 Free Software Foundation, Inc.
+*  Written by Andrew Makhorin <mao@gnu.org>.
+*
+*  GLPK is free software: you can redistribute it and/or modify it
+*  under the terms of the GNU General Public License as published by
+*  the Free Software Foundation, either version 3 of the License, or
+*  (at your option) any later version.
+*
+*  GLPK is distributed in the hope that it will be useful, but WITHOUT
+*  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+*  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+*  License for more details.
+*
+*  You should have received a copy of the GNU General Public License
+*  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
+***********************************************************************/
+
+#include "env.h"
+
+/***********************************************************************
+*  NAME
+*
+*  glp_error - display fatal error message and terminate execution
+*
+*  SYNOPSIS
+*
+*  void glp_error(const char *fmt, ...);
+*
+*  DESCRIPTION
+*
+*  The routine glp_error (implemented as a macro) formats its
+*  parameters using the format control string fmt, writes the formatted
+*  message on the terminal, and abnormally terminates the program. */
+
+static void errfunc(const char *fmt, ...)
+{     ENV *env = get_env_ptr();
+      va_list arg;
+#if 1 /* 07/XI-2015 */
+      env->err_st = 1;
+#endif
+      env->term_out = GLP_ON;
+      va_start(arg, fmt);
+      xvprintf(fmt, arg);
+      va_end(arg);
+      xprintf("Error detected in file %s at line %d\n",
+         env->err_file, env->err_line);
+      if (env->err_hook != NULL)
+         env->err_hook(env->err_info);
+      abort();
+      exit(EXIT_FAILURE);
+      /* no return */
+}
+
+glp_errfunc glp_error_(const char *file, int line)
+{     ENV *env = get_env_ptr();
+      env->err_file = file;
+      env->err_line = line;
+      return errfunc;
+}
+
+#if 1 /* 07/XI-2015 */
+/***********************************************************************
+*  NAME
+*
+*  glp_at_error - check for error state
+*
+*  SYNOPSIS
+*
+*  int glp_at_error(void);
+*
+*  DESCRIPTION
+*
+*  The routine glp_at_error checks if the GLPK environment is at error
+*  state, i.e. if the call to the routine is (indirectly) made from the
+*  glp_error routine via an user-defined hook routine.
+*
+*  RETURNS
+*
+*  If the GLPK environment is at error state, the routine glp_at_error
+*  returns non-zero, otherwise zero. */
+
+int glp_at_error(void)
+{     ENV *env = get_env_ptr();
+      return env->err_st;
+}
+#endif
+
+/***********************************************************************
+*  NAME
+*
+*  glp_assert - check for logical condition
+*
+*  SYNOPSIS
+*
+*  void glp_assert(int expr);
+*
+*  DESCRIPTION
+*
+*  The routine glp_assert (implemented as a macro) checks for a logical
+*  condition specified by the parameter expr. If the condition is false
+*  (i.e. the value of expr is zero), the routine writes a message on
+*  the terminal and abnormally terminates the program. */
+
+void glp_assert_(const char *expr, const char *file, int line)
+{     glp_error_(file, line)("Assertion failed: %s\n", expr);
+      /* no return */
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_error_hook - install hook to intercept abnormal termination
+*
+*  SYNOPSIS
+*
+*  void glp_error_hook(void (*func)(void *info), void *info);
+*
+*  DESCRIPTION
+*
+*  The routine glp_error_hook installs a user-defined hook routine to
+*  intercept abnormal termination.
+*
+*  The parameter func specifies the user-defined hook routine. It is
+*  called from the routine glp_error before the latter calls the abort
+*  function to abnormally terminate the application program because of
+*  fatal error. The parameter info is a transit pointer, specified in
+*  the corresponding call to the routine glp_error_hook; it may be used
+*  to pass some information to the hook routine.
+*
+*  To uninstall the hook routine the parameters func and info should be
+*  both specified as NULL. */
+
+void glp_error_hook(void (*func)(void *info), void *info)
+{     ENV *env = get_env_ptr();
+      if (func == NULL)
+      {  env->err_hook = NULL;
+         env->err_info = NULL;
+      }
+      else
+      {  env->err_hook = func;
+         env->err_info = info;
+      }
+      return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  put_err_msg - provide error message string
+*
+*  SYNOPSIS
+*
+*  #include "env.h"
+*  void put_err_msg(const char *msg);
+*
+*  DESCRIPTION
+*
+*  The routine put_err_msg stores an error message string pointed to by
+*  msg to the environment block. */
+
+void put_err_msg(const char *msg)
+{     ENV *env = get_env_ptr();
+      int len;
+      len = strlen(msg);
+      if (len >= EBUF_SIZE)
+         len = EBUF_SIZE - 1;
+      memcpy(env->err_buf, msg, len);
+      if (len > 0 && env->err_buf[len-1] == '\n')
+         len--;
+      env->err_buf[len] = '\0';
+      return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  get_err_msg - obtain error message string
+*
+*  SYNOPSIS
+*
+*  #include "env.h"
+*  const char *get_err_msg(void);
+*
+*  RETURNS
+*
+*  The routine get_err_msg returns a pointer to an error message string
+*  previously stored by the routine put_err_msg. */
+
+const char *get_err_msg(void)
+{     ENV *env = get_env_ptr();
+      return env->err_buf;
+}
+
+/* eof */