simplex-glpk with modified glpk for fpgaHEADmaster

1 files changed, 92 insertions, 0 deletions

diff --git a/glpk-5.0/src/zlib/zio.c b/glpk-5.0/src/zlib/zio.c
new file mode 100644
index 0000000..a55b258
--- /dev/null
+++ b/glpk-5.0/src/zlib/zio.c
@@ -0,0 +1,92 @@
+/* zio.c (simulation of non-standard low-level i/o functions) */
+
+/* Written by Andrew Makhorin <mao@gnu.org>, April 2011
+ * For conditions of distribution and use, see copyright notice in
+ * zlib.h */
+
+/* (reserved for copyright notice) */
+
+#include <assert.h>
+#include <stdio.h>
+#include "zio.h"
+
+static FILE *file[FOPEN_MAX];
+static int initialized = 0;
+
+static void initialize(void)
+{     int fd;
+      assert(!initialized);
+      file[0] = stdin;
+      file[1] = stdout;
+      file[2] = stderr;
+      for (fd = 3; fd < FOPEN_MAX; fd++)
+         file[fd] = NULL;
+      initialized = 1;
+      return;
+}
+
+int open(const char *path, int oflag, ...)
+{     FILE *fp;
+      int fd;
+      if (!initialized) initialize();
+      /* see file gzlib.c, function gz_open */
+      if (oflag == O_RDONLY)
+         fp = fopen(path, "rb");
+      else if (oflag == (O_WRONLY | O_CREAT | O_TRUNC))
+         fp = fopen(path, "wb");
+      else if (oflag == (O_WRONLY | O_CREAT | O_APPEND))
+         fp = fopen(path, "ab");
+      else
+         assert(oflag != oflag);
+      if (fp == NULL)
+         return -1;
+      for (fd = 0; fd < FOPEN_MAX; fd++)
+         if (file[fd] == NULL) break;
+      assert(fd < FOPEN_MAX);
+      file[fd] = fp;
+      return fd;
+}
+
+long read(int fd, void *buf, unsigned long nbyte)
+{     unsigned long count;
+      if (!initialized) initialize();
+      assert(0 <= fd && fd < FOPEN_MAX);
+      assert(file[fd] != NULL);
+      count = fread(buf, 1, nbyte, file[fd]);
+      if (ferror(file[fd]))
+         return -1;
+      return count;
+}
+
+long write(int fd, const void *buf, unsigned long nbyte)
+{     unsigned long count;
+      if (!initialized) initialize();
+      assert(0 <= fd && fd < FOPEN_MAX);
+      assert(file[fd] != NULL);
+      count = fwrite(buf, 1, nbyte, file[fd]);
+      if (count != nbyte)
+         return -1;
+      if (fflush(file[fd]) != 0)
+         return -1;
+      return count;
+}
+
+long lseek(int fd, long offset, int whence)
+{     if (!initialized) initialize();
+      assert(0 <= fd && fd < FOPEN_MAX);
+      assert(file[fd] != NULL);
+      if (fseek(file[fd], offset, whence) != 0)
+         return -1;
+      return ftell(file[fd]);
+}
+
+int close(int fd)
+{     if (!initialized) initialize();
+      assert(0 <= fd && fd < FOPEN_MAX);
+      assert(file[fd] != NULL);
+      fclose(file[fd]);
+      file[fd] = NULL;
+      return 0;
+}
+
+/* eof */