Postgres95 1.01 Distribution - Virgin Sources

src/bin/psql/stringutils.c

@@ -0,0 +1,104 @@
+/*-------------------------------------------------------------------------
+ *
+ * stringutils.c--
+ *    simple string manipulation routines
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *    $Header: /cvsroot/pgsql/src/bin/psql/stringutils.c,v 1.1.1.1 1996/07/09 06:22:15 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include "stringutils.h"
+
+/* all routines assume null-terminated strings! */
+
+/* removes whitespaces from the left, right and both sides of a string */
+/* MODIFIES the string passed in and returns the head of it */
+char* leftTrim(char* s)  
+{
+  char* s2 = s;
+  int shift=0;
+  int j=0;
+
+  while (isspace(*s))
+    { s++; shift++;}
+  if (shift > 0)
+    {
+      while ( (s2[j] = s2[j+shift]) !='\0')
+	j++;
+    }
+
+  return s2;
+}
+
+char* rightTrim(char* s)
+{
+  char* sEnd;
+  sEnd = s+strlen(s)-1;
+  while (isspace(*sEnd))
+    sEnd--;
+  if (sEnd < s)
+    s[0]='\0';
+  else
+    s[sEnd-s+1]='\0';
+  return s;
+}
+
+char* doubleTrim(char* s)
+{
+  strcpy(s,leftTrim(rightTrim(s)));
+  return s;
+}
+
+/* dupstr : copies a string, while allocating space for it. 
+   the CALLER is responsible for freeing the space
+   returns NULL if the argument is NULL*/
+char* dupstr(char *s)
+{
+  char* result;
+
+  if (s == NULL)
+    return NULL;
+
+  result = (char*)malloc(strlen(s)+1);
+  strcpy(result, s);
+  return result;
+}
+
+
+#ifdef STRINGUTILS_TEST
+void testStringUtils()
+{
+  static char* tests[] = {" goodbye  \n", /* space on both ends */
+			  "hello world",  /* no spaces to trim */
+			  "",		/* empty string */
+			  "a",		/* string with one char*/
+			  " ",		/* string with one whitespace*/
+			  NULL_STR};
+
+  int i=0;
+  while (tests[i]!=NULL_STR)
+    {
+      char* t;
+      t = dupstr(tests[i]);
+      printf("leftTrim(%s) = ",t);
+      printf("%sEND\n", leftTrim(t));
+      t = dupstr(tests[i]);
+      printf("rightTrim(%s) = ",t);
+      printf("%sEND\n", rightTrim(t));
+      t = dupstr(tests[i]);
+      printf("doubleTrim(%s) = ",t);
+      printf("%sEND\n", doubleTrim(t));
+      i++;
+    }
+
+}
+
+#endif