Initial commit

vimlac/plist.c

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+/******************************************************************************\
+ *                               plist.c                                      *
+ *                              =========                                     *
+ *                                                                            *
+ *  This file implements a 'plist'-like structure to store a list of          *
+ *  name/value pairs.  In this incarnation the plist stores names and values  *
+ *  as char strings.                                                          *
+ *                                                                            *
+ *      PLIST PlistCreate(void);                                              *
+ *                                                                            *
+ *      void PListInsert(PLIST plist, char *name, char *value);               *
+ *                                                                            *
+ *      void *PlistFind(PLIST plist, char *name);                             *
+ *                                                                            *
+ *      void PlistDestroy(PLIST plist);                                       *
+ *                                                                            *
+ *      void PlistDump(PLIST plist);                                          *
+ *                                                                            *
+\******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "plist.h"
+
+
+/******
+ * Define the plist header structure and data types.
+ ******/
+
+typedef struct _PList
+{
+    char *name;
+    char *value;
+    struct _PList *next;
+} PList;
+
+
+/******************************************************************************
+       Name : error()
+Description : printf()-like error routine.
+ Parameters : params like printf()
+    Returns : Doesn't, calls exit().
+   Comments : 
+ ******************************************************************************/
+static void
+error(char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    fprintf(stderr, "\n");
+    va_end(ap);
+
+    exit(1);
+}
+
+
+/******************************************************************************
+       Name : PlistCreate()
+Description : Routine to create a plist.
+ Parameters : 
+    Returns : Address (void *) of plist header.
+   Comments : 
+ ******************************************************************************/
+PLIST
+PlistCreate(void)
+{
+    PList *plist = malloc(sizeof(PList *));
+
+    if (plist == NULL)
+        error("Out of memory.");
+
+    plist = NULL;
+
+    return (PLIST) plist;
+}
+
+
+/******************************************************************************
+       Name : PlistInsert()
+Description : Function to insert new record into the property list.
+ Parameters : htable  - address (void *) of plist header
+            : record  - address (void *) of record to insert
+            : recszie - size of record (bytes)
+    Returns : 
+   Comments : This routine takes a copy of the user record.
+            : New record placed in front of any existing equal record.
+ ******************************************************************************/
+void
+PListInsert(PLIST plist, char *name, char *value)
+{
+    PList *newrec = malloc(sizeof(PList));
+    char *newname = malloc(strlen(name)+1);
+    char *newvalue = malloc(strlen(value)+1);
+    PList *hdr = (PList *) plist;
+
+    if (newrec == NULL || newname == NULL || newvalue == NULL)
+        error("Out of memory");
+
+    strcpy(newname, name);
+    strcpy(newvalue, value);
+
+    newrec->next = NULL;
+    newrec->name = newname;
+    newrec->value = newvalue;
+
+//    plist = (PList *) plist;
+
+    newrec->next = hdr;
+    hdr->next = newrec;
+}
+
+
+/******************************************************************************
+       Name : PlistLookup()
+Description : Look for a record in a plist.
+ Parameters : plist - plist to look in
+            : name  - the name to look for
+    Returns : Returns pointer to value string or NULL if not found.
+   Comments : 
+ ******************************************************************************/
+char *
+PlistFind(PLIST plist, char *name)
+{
+    PList *hdr = (PList *) plist;
+
+    while (hdr)
+    {
+        if (strcmp(hdr->name, name) == 0)
+            return hdr->value;
+    }
+
+    return NULL;
+}
+
+
+/******************************************************************************
+       Name : PlistDestroy()
+Description : Destroy a property list.
+ Parameters : plist - plist to destroy
+    Returns : 
+   Comments : 
+ ******************************************************************************/
+void
+PlistDestroy(PLIST plist)
+{
+    PList *hdr = (PList *) plist;
+
+    while (hdr)
+    {
+        PList *next = hdr->next;
+        free(hdr->name);
+        free(hdr->value);
+        free(hdr);
+        hdr = next;
+    }
+}
+
+
+/******************************************************************************
+       Name : PlistDump()
+Description : Dump the plist to a specified open output FILE.
+ Parameters : plist - plist to dump
+            : output - FILE pointer to write to (stdout if NULL)
+    Returns : 
+   Comments : 
+ ******************************************************************************/
+void
+PlistDump(PLIST plist, FILE *output)
+{
+    PList *hdr = (PList *) plist;
+
+    if (output == NULL)
+        output = stdout;
+
+    while (hdr)
+    {
+        fprintf(output, "%s: %s\n", hdr->name, hdr->value);
+        hdr = hdr->next;
+    }
+}

vimlac/plist.h

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+/******************************************************************************\
+ *                               plist.h                                      *
+ *                              =========                                     *
+ *                                                                            *
+ *  This file advertises the plist system interface.                          *
+ *                                                                            *
+\******************************************************************************/
+
+#ifndef PLIST_H
+#define PLIST_H
+
+#include <stdio.h>
+
+/******
+ * Typedefs for user.
+ ******/
+
+typedef void *PLIST;
+
+
+/******
+ * Function prototypes.
+ ******/
+
+PLIST PlistCreate(void);
+void PListInsert(PLIST plist, char *name, char *value);
+char *PlistFind(PLIST plist, char *name);
+void PlistDestroy(PLIST plist);
+void PlistDump(PLIST plist, FILE *output);
+
+
+#endif