Initial revision

CVS patchset: 19
CVS date: 1995/12/13 16:01:36

diff --git a/lib/stringbuf.c b/lib/stringbuf.c
new file mode 100644 (file)
index 0000000..a1062b9
--- /dev/null
+++ b/lib/stringbuf.c
@@ -0,0 +1,66 @@
+#include <stdlib.h>
+#include "stringbuf.h"
+
+#define BUF_CHUNK 1024
+
+struct StringBufRec {
+    char *buf;
+    char *tail;     /* Points to first "free" char (usually '\0') */
+    int allocated;
+    int free;
+};
+
+StringBuf newStringBuf(void)
+{
+    StringBuf sb = malloc(sizeof(struct StringBufRec));
+
+    sb->buf = malloc(BUF_CHUNK * sizeof(char));
+    sb->buf[0] = '\0';
+    sb->tail = sb->buf;
+    sb->allocated = BUF_CHUNK;
+    sb->free = BUF_CHUNK;
+    
+    return sb;
+}
+
+void freeStringBuf(StringBuf sb)
+{
+    free(sb->buf);
+    free(sb);
+}
+
+void truncStringBuf(StringBuf sb)
+{
+    sb->buf[0] = '\0';
+    sb->tail = sb->buf;
+    sb->free = sb->allocated;
+}
+
+char *getStringBuf(StringBuf sb)
+{
+    return sb->buf;
+}
+
+void appendStringBufAux(StringBuf sb, char *s, int nl)
+{
+    int l;
+
+    l = strlen(s);
+    /* If free == l there is no room for NULL terminator! */
+    if ((l + nl) > sb->free) {
+        sb->allocated += BUF_CHUNK;
+       sb->free += BUF_CHUNK;
+        sb->buf = realloc(sb->buf, sb->allocated);
+       sb->tail = sb->buf + (sb->allocated - sb->free);
+    }
+    
+    strcpy(sb->tail, s);
+    sb->tail += l;
+    sb->free -= l;
+    if (nl) {
+        sb->tail[0] = '\n';
+        sb->tail[1] = '\0';
+       sb->tail++;
+       sb->free--;
+    }
+}

diff --git a/lib/stringbuf.h b/lib/stringbuf.h
new file mode 100644 (file)
index 0000000..bd93705
--- /dev/null
+++ b/lib/stringbuf.h
@@ -0,0 +1,16 @@
+#ifndef _STRINGBUF_H_
+#define _STRINGBUF_H_
+
+typedef struct StringBufRec *StringBuf;
+
+StringBuf newStringBuf(void);
+void freeStringBuf(StringBuf sb);
+void truncStringBuf(StringBuf sb);
+char *getStringBuf(StringBuf sb);
+
+#define appendStringBuf(sb, s)     appendStringBufAux(sb, s, 0)
+#define appendLineStringBuf(sb, s) appendStringBufAux(sb, s, 1)
+
+void appendStringBufAux(StringBuf sb, char *s, int nl);
+
+#endif _STRINGBUF_H_