lemon-project-template-glpk

comparison deps/glpk/src/glpenv03.c @ 11:4fc6ad2fb8a6

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Test GLPK in src/main.cc
author Alpar Juttner <alpar@cs.elte.hu>
date Sun, 06 Nov 2011 21:43:29 +0100
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-1:000000000000 0:d18301811d88
1 /* glpenv03.c (terminal output) */
2
3 /***********************************************************************
4 * This code is part of GLPK (GNU Linear Programming Kit).
5 *
6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
7 * 2009, 2010, 2011 Andrew Makhorin, Department for Applied Informatics,
8 * Moscow Aviation Institute, Moscow, Russia. All rights reserved.
9 * E-mail: <mao@gnu.org>.
10 *
11 * GLPK is free software: you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * GLPK is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 * License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>.
23 ***********************************************************************/
24
25 #include "glpapi.h"
26
27 /***********************************************************************
28 * NAME
29 *
30 * glp_printf - write formatted output to terminal
31 *
32 * SYNOPSIS
33 *
34 * void glp_printf(const char *fmt, ...);
35 *
36 * DESCRIPTION
37 *
38 * The routine glp_printf uses the format control string fmt to format
39 * its parameters and writes the formatted output to the terminal. */
40
41 void glp_printf(const char *fmt, ...)
42 { va_list arg;
43 va_start(arg, fmt);
44 xvprintf(fmt, arg);
45 va_end(arg);
46 return;
47 }
48
49 /***********************************************************************
50 * NAME
51 *
52 * glp_vprintf - write formatted output to terminal
53 *
54 * SYNOPSIS
55 *
56 * void glp_vprintf(const char *fmt, va_list arg);
57 *
58 * DESCRIPTION
59 *
60 * The routine glp_vprintf uses the format control string fmt to format
61 * its parameters specified by the list arg and writes the formatted
62 * output to the terminal. */
63
64 void glp_vprintf(const char *fmt, va_list arg)
65 { ENV *env = get_env_ptr();
66 /* if terminal output is disabled, do nothing */
67 if (!env->term_out) goto skip;
68 /* format the output */
69 vsprintf(env->term_buf, fmt, arg);
70 /* pass the output to the user-defined routine */
71 if (env->term_hook != NULL)
72 { if (env->term_hook(env->term_info, env->term_buf) != 0)
73 goto skip;
74 }
75 /* send the output to the terminal */
76 fputs(env->term_buf, stdout);
77 fflush(stdout);
78 /* copy the output to the text file */
79 if (env->tee_file != NULL)
80 { fputs(env->term_buf, env->tee_file);
81 fflush(env->tee_file);
82 }
83 skip: return;
84 }
85
86 /***********************************************************************
87 * NAME
88 *
89 * glp_term_out - enable/disable terminal output
90 *
91 * SYNOPSIS
92 *
93 * int glp_term_out(int flag);
94 *
95 * DESCRIPTION
96 *
97 * Depending on the parameter flag the routine glp_term_out enables or
98 * disables terminal output performed by glpk routines:
99 *
100 * GLP_ON - enable terminal output;
101 * GLP_OFF - disable terminal output.
102 *
103 * RETURNS
104 *
105 * The routine glp_term_out returns the previous value of the terminal
106 * output flag. */
107
108 int glp_term_out(int flag)
109 { ENV *env = get_env_ptr();
110 int old = env->term_out;
111 if (!(flag == GLP_ON || flag == GLP_OFF))
112 xerror("glp_term_out: flag = %d; invalid value\n", flag);
113 env->term_out = flag;
114 return old;
115 }
116
117 /***********************************************************************
118 * NAME
119 *
120 * glp_term_hook - install hook to intercept terminal output
121 *
122 * SYNOPSIS
123 *
124 * void glp_term_hook(int (*func)(void *info, const char *s),
125 * void *info);
126 *
127 * DESCRIPTION
128 *
129 * The routine glp_term_hook installs a user-defined hook routine to
130 * intercept all terminal output performed by glpk routines.
131 *
132 * This feature can be used to redirect the terminal output to other
133 * destination, for example to a file or a text window.
134 *
135 * The parameter func specifies the user-defined hook routine. It is
136 * called from an internal printing routine, which passes to it two
137 * parameters: info and s. The parameter info is a transit pointer,
138 * specified in the corresponding call to the routine glp_term_hook;
139 * it may be used to pass some information to the hook routine. The
140 * parameter s is a pointer to the null terminated character string,
141 * which is intended to be written to the terminal. If the hook routine
142 * returns zero, the printing routine writes the string s to the
143 * terminal in a usual way; otherwise, if the hook routine returns
144 * non-zero, no terminal output is performed.
145 *
146 * To uninstall the hook routine the parameters func and info should be
147 * specified as NULL. */
148
149 void glp_term_hook(int (*func)(void *info, const char *s), void *info)
150 { ENV *env = get_env_ptr();
151 if (func == NULL)
152 { env->term_hook = NULL;
153 env->term_info = NULL;
154 }
155 else
156 { env->term_hook = func;
157 env->term_info = info;
158 }
159 return;
160 }
161
162 /***********************************************************************
163 * NAME
164 *
165 * glp_open_tee - start copying terminal output to text file
166 *
167 * SYNOPSIS
168 *
169 * int glp_open_tee(const char *fname);
170 *
171 * DESCRIPTION
172 *
173 * The routine glp_open_tee starts copying all the terminal output to
174 * an output text file, whose name is specified by the character string
175 * fname.
176 *
177 * RETURNS
178 *
179 * 0 - operation successful
180 * 1 - copying terminal output is already active
181 * 2 - unable to create output file */
182
183 int glp_open_tee(const char *fname)
184 { ENV *env = get_env_ptr();
185 if (env->tee_file != NULL)
186 { /* copying terminal output is already active */
187 return 1;
188 }
189 env->tee_file = fopen(fname, "w");
190 if (env->tee_file == NULL)
191 { /* unable to create output file */
192 return 2;
193 }
194 return 0;
195 }
196
197 /***********************************************************************
198 * NAME
199 *
200 * glp_close_tee - stop copying terminal output to text file
201 *
202 * SYNOPSIS
203 *
204 * int glp_close_tee(void);
205 *
206 * DESCRIPTION
207 *
208 * The routine glp_close_tee stops copying the terminal output to the
209 * output text file previously open by the routine glp_open_tee closing
210 * that file.
211 *
212 * RETURNS
213 *
214 * 0 - operation successful
215 * 1 - copying terminal output was not started */
216
217 int glp_close_tee(void)
218 { ENV *env = get_env_ptr();
219 if (env->tee_file == NULL)
220 { /* copying terminal output was not started */
221 return 1;
222 }
223 fclose(env->tee_file);
224 env->tee_file = NULL;
225 return 0;
226 }
227
228 /* eof */