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-rw-r--r--src/os-specific.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/os-specific.c b/src/os-specific.c
index 1fddbaeb7..664e74070 100644
--- a/src/os-specific.c
+++ b/src/os-specific.c
@@ -109,5 +109,114 @@ void vms_special_exit(int code, int vms_show)
decc$exit(vms_code);
}
+#if defined(__DECC) && !defined(__VAX) && \
+ defined(__CRTL_VER) && (__CRTL_VER >= 70301000)
+
+/*
+ * 2004-09-19 SMS.
+ *
+ * decc_init()
+ *
+ * On non-VAX systems, use LIB$INITIALIZE to set a collection of C
+ * RTL features without using the DECC$* logical name method, nor
+ * requiring the user to define the corresponding logical names.
+ */
+
+#include <unixlib.h>
+
+/* Structure to hold a DECC$* feature name and its desired value. */
+typedef struct {
+ char *name;
+ int value;
+} decc_feat_t;
+
+/* Array of DECC$* feature names and their desired values. */
+static decc_feat_t decc_feat_array[] = {
+ /* Preserve command-line case with SET PROCESS/PARSE_STYLE=EXTENDED */
+ { "DECC$ARGV_PARSE_STYLE", 1 },
+ /* Preserve case for file names on ODS5 disks. */
+ { "DECC$EFS_CASE_PRESERVE", 1 },
+ /* Enable multiple dots (and most characters) in ODS5 file names,
+ while preserving VMS-ness of ";version". */
+ { "DECC$EFS_CHARSET", 1 },
+ /* List terminator. */
+ { (char *)NULL, 0 }
+};
+
+/* Flag to sense if decc_init() was called. */
+static int decc_init_done = -1;
+
+/* LIB$INITIALIZE initialization function. */
+static void decc_init(void)
+{
+ int feat_index;
+ int feat_value;
+ int feat_value_max;
+ int feat_value_min;
+ int i;
+ int sts;
+
+ /* Set the global flag to indicate that LIB$INITIALIZE worked. */
+ decc_init_done = 1;
+
+ /* Loop through all items in the decc_feat_array[]. */
+ for(i = 0; decc_feat_array[i].name != NULL; i++) {
+
+ /* Get the feature index. */
+ feat_index = decc$feature_get_index( decc_feat_array[i].name);
+
+ if(feat_index >= 0) {
+ /* Valid item. Collect its properties. */
+ feat_value = decc$feature_get_value( feat_index, 1);
+ feat_value_min = decc$feature_get_value( feat_index, 2);
+ feat_value_max = decc$feature_get_value( feat_index, 3);
+
+ if((decc_feat_array[i].value >= feat_value_min) &&
+ (decc_feat_array[i].value <= feat_value_max)) {
+ /* Valid value. Set it if necessary. */
+ if(feat_value != decc_feat_array[i].value) {
+ sts = decc$feature_set_value( feat_index, 1,
+ decc_feat_array[i].value);
+ }
+ }
+ else {
+ /* Invalid DECC feature value. */
+ printf(" INVALID DECC FEATURE VALUE, %d: %d <= %s <= %d.\n",
+ feat_value,
+ feat_value_min, decc_feat_array[i].name, feat_value_max);
+ }
+ }
+ else {
+ /* Invalid DECC feature name. */
+ printf(" UNKNOWN DECC FEATURE: %s.\n", decc_feat_array[i].name);
+ }
+
+ }
+}
+
+/* Get "decc_init()" into a valid, loaded LIB$INITIALIZE PSECT. */
+
+#pragma nostandard
+
+/* Establish the LIB$INITIALIZE PSECTs, with proper alignment and
+ other attributes. Note that "nopic" is significant only on VAX. */
+#pragma extern_model save
+#pragma extern_model strict_refdef "LIB$INITIALIZ" 2, nopic, nowrt
+const int spare[8] = {0};
+#pragma extern_model strict_refdef "LIB$INITIALIZE" 2, nopic, nowrt
+void (*const x_decc_init)() = decc_init;
+#pragma extern_model restore
+
+/* Fake reference to ensure loading the LIB$INITIALIZE PSECT. */
+#pragma extern_model save
+int LIB$INITIALIZE(void);
+#pragma extern_model strict_refdef
+int dmy_lib$initialize = (int) LIB$INITIALIZE;
+#pragma extern_model restore
+
+#pragma standard
+
+#endif /* __DECC && !__VAX && __CRTL_VER && __CRTL_VER >= 70301000 */
+
#endif /* __VMS */