simplex-glpk with modified glpk for fpgaHEADmaster

1 files changed, 260 insertions, 0 deletions

diff --git a/glpk-5.0/src/env/stdout.c b/glpk-5.0/src/env/stdout.c
new file mode 100644
index 0000000..f82e88d
--- /dev/null
+++ b/glpk-5.0/src/env/stdout.c
@@ -0,0 +1,260 @@
+/* stdout.c (terminal output) */
+
+/***********************************************************************
+*  This code is part of GLPK (GNU Linear Programming Kit).
+*  Copyright (C) 2000-2013 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/>.
+***********************************************************************/
+
+#undef NDEBUG
+#include <assert.h>
+#include "env.h"
+
+/***********************************************************************
+*  NAME
+*
+*  glp_puts - write string on terminal
+*
+*  SYNOPSIS
+*
+*  void glp_puts(const char *s);
+*
+*  The routine glp_puts writes the string s on the terminal. */
+
+void glp_puts(const char *s)
+{     ENV *env = get_env_ptr();
+      /* if terminal output is disabled, do nothing */
+      if (!env->term_out)
+         goto skip;
+      /* pass the string to the hook routine, if defined */
+      if (env->term_hook != NULL)
+      {  if (env->term_hook(env->term_info, s) != 0)
+            goto skip;
+      }
+      /* write the string on the terminal */
+      fputs(s, stdout);
+      fflush(stdout);
+      /* write the string on the tee file, if required */
+      if (env->tee_file != NULL)
+      {  fputs(s, env->tee_file);
+         fflush(env->tee_file);
+      }
+skip: return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_printf - write formatted output on terminal
+*
+*  SYNOPSIS
+*
+*  void glp_printf(const char *fmt, ...);
+*
+*  DESCRIPTION
+*
+*  The routine glp_printf uses the format control string fmt to format
+*  its parameters and writes the formatted output on the terminal. */
+
+void glp_printf(const char *fmt, ...)
+{     ENV *env = get_env_ptr();
+      va_list arg;
+      /* if terminal output is disabled, do nothing */
+      if (!env->term_out)
+         goto skip;
+      /* format the output */
+      va_start(arg, fmt);
+      vsprintf(env->term_buf, fmt, arg);
+      /* (do not use xassert) */
+      assert(strlen(env->term_buf) < TBUF_SIZE);
+      va_end(arg);
+      /* write the formatted output on the terminal */
+      glp_puts(env->term_buf);
+skip: return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_vprintf - write formatted output on terminal
+*
+*  SYNOPSIS
+*
+*  void glp_vprintf(const char *fmt, va_list arg);
+*
+*  DESCRIPTION
+*
+*  The routine glp_vprintf uses the format control string fmt to format
+*  its parameters specified by the list arg and writes the formatted
+*  output on the terminal. */
+
+void glp_vprintf(const char *fmt, va_list arg)
+{     ENV *env = get_env_ptr();
+      /* if terminal output is disabled, do nothing */
+      if (!env->term_out)
+         goto skip;
+      /* format the output */
+      vsprintf(env->term_buf, fmt, arg);
+      /* (do not use xassert) */
+      assert(strlen(env->term_buf) < TBUF_SIZE);
+      /* write the formatted output on the terminal */
+      glp_puts(env->term_buf);
+skip: return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_term_out - enable/disable terminal output
+*
+*  SYNOPSIS
+*
+*  int glp_term_out(int flag);
+*
+*  DESCRIPTION
+*
+*  Depending on the parameter flag the routine glp_term_out enables or
+*  disables terminal output performed by glpk routines:
+*
+*  GLP_ON  - enable terminal output;
+*  GLP_OFF - disable terminal output.
+*
+*  RETURNS
+*
+*  The routine glp_term_out returns the previous value of the terminal
+*  output flag. */
+
+int glp_term_out(int flag)
+{     ENV *env = get_env_ptr();
+      int old = env->term_out;
+      if (!(flag == GLP_ON || flag == GLP_OFF))
+         xerror("glp_term_out: flag = %d; invalid parameter\n", flag);
+      env->term_out = flag;
+      return old;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_term_hook - install hook to intercept terminal output
+*
+*  SYNOPSIS
+*
+*  void glp_term_hook(int (*func)(void *info, const char *s),
+*     void *info);
+*
+*  DESCRIPTION
+*
+*  The routine glp_term_hook installs a user-defined hook routine to
+*  intercept all terminal output performed by glpk routines.
+*
+*  This feature can be used to redirect the terminal output to other
+*  destination, for example to a file or a text window.
+*
+*  The parameter func specifies the user-defined hook routine. It is
+*  called from an internal printing routine, which passes to it two
+*  parameters: info and s. The parameter info is a transit pointer,
+*  specified in the corresponding call to the routine glp_term_hook;
+*  it may be used to pass some information to the hook routine. The
+*  parameter s is a pointer to the null terminated character string,
+*  which is intended to be written to the terminal. If the hook routine
+*  returns zero, the printing routine writes the string s to the
+*  terminal in a usual way; otherwise, if the hook routine returns
+*  non-zero, no terminal output is performed.
+*
+*  To uninstall the hook routine the parameters func and info should be
+*  specified as NULL. */
+
+void glp_term_hook(int (*func)(void *info, const char *s), void *info)
+{     ENV *env = get_env_ptr();
+      if (func == NULL)
+      {  env->term_hook = NULL;
+         env->term_info = NULL;
+      }
+      else
+      {  env->term_hook = func;
+         env->term_info = info;
+      }
+      return;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_open_tee - start copying terminal output to text file
+*
+*  SYNOPSIS
+*
+*  int glp_open_tee(const char *name);
+*
+*  DESCRIPTION
+*
+*  The routine glp_open_tee starts copying all the terminal output to
+*  an output text file, whose name is specified by the character string
+*  name.
+*
+*  RETURNS
+*
+*  0 - operation successful
+*  1 - copying terminal output is already active
+*  2 - unable to create output file */
+
+int glp_open_tee(const char *name)
+{     ENV *env = get_env_ptr();
+      if (env->tee_file != NULL)
+      {  /* copying terminal output is already active */
+         return 1;
+      }
+      env->tee_file = fopen(name, "w");
+      if (env->tee_file == NULL)
+      {  /* unable to create output file */
+         return 2;
+      }
+      return 0;
+}
+
+/***********************************************************************
+*  NAME
+*
+*  glp_close_tee - stop copying terminal output to text file
+*
+*  SYNOPSIS
+*
+*  int glp_close_tee(void);
+*
+*  DESCRIPTION
+*
+*  The routine glp_close_tee stops copying the terminal output to the
+*  output text file previously open by the routine glp_open_tee closing
+*  that file.
+*
+*  RETURNS
+*
+*  0 - operation successful
+*  1 - copying terminal output was not started */
+
+int glp_close_tee(void)
+{     ENV *env = get_env_ptr();
+      if (env->tee_file == NULL)
+      {  /* copying terminal output was not started */
+         return 1;
+      }
+      fclose(env->tee_file);
+      env->tee_file = NULL;
+      return 0;
+}
+
+/* eof */