--- /dev/null
+/*****************************************************************************/
+/* */
+/* strbuf.c */
+/* */
+/* Variable sized string buffers */
+/* */
+/* */
+/* */
+/* (C) 2001 Ullrich von Bassewitz */
+/* Wacholderweg 14 */
+/* D-70597 Stuttgart */
+/* EMail: uz@musoftware.de */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#include <string.h>
+
+/* common */
+#include "xmalloc.h"
+#include "strbuf.h"
+
+
+
+/*****************************************************************************/
+/* Helpers */
+/*****************************************************************************/
+
+
+
+static void SB_Realloc (StrBuf* B, unsigned NewSize)
+/* Reallocate the string buffer space, make sure at least NewSize bytes are
+ * available.
+ */
+{
+ /* Get the current size, use a minimum of 8 bytes */
+ unsigned NewAllocated = B->Allocated;
+ if (NewAllocated == 0) {
+ NewAllocated = 8;
+ }
+
+ /* Round up to the next power of two */
+ while (NewAllocated < NewSize) {
+ NewAllocated *= 2;
+ }
+
+ /* Reallocate the buffer */
+ B->Buf = xrealloc (B->Buf, NewAllocated);
+ B->Allocated = NewAllocated;
+}
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+StrBuf* InitStrBuf (StrBuf* B)
+/* Initialize a string buffer */
+{
+ B->Allocated = 0;
+ B->Len = 0;
+ B->Buf = 0;
+ return B;
+}
+
+
+
+void DoneStrBuf (StrBuf* B)
+/* Free the data of a string buffer (but not the struct itself) */
+{
+ xfree (B->Buf);
+ B->Allocated = 0;
+ B->Len = 0;
+ B->Buf = 0;
+}
+
+
+
+StrBuf* NewStrBuf (void)
+/* Allocate, initialize and return a new StrBuf */
+{
+ /* Allocate a new string buffer */
+ StrBuf* B = xmalloc (sizeof (StrBuf));
+
+ /* Initialize the struct... */
+ InitStrBuf (B);
+
+ /* ...and return it */
+ return B;
+}
+
+
+
+void FreeStrBuf (StrBuf* B)
+/* Free a string buffer */
+{
+ /* Don't use Done here, since we won't use the struct later */
+ xfree (B->Buf);
+ xfree (B);
+}
+
+
+
+void SB_Terminate (StrBuf* B)
+/* Zero terminate the given string buffer. NOTE: The terminating zero is not
+ * accounted for in B->Len, if you want that, you have to use AppendChar!
+ */
+{
+ unsigned NewLen = B->Len + 1;
+ if (NewLen > B->Allocated) {
+ SB_Realloc (B, NewLen);
+ }
+ B->Buf[B->Len] = '\0';
+}
+
+
+
+void SB_AppendChar (StrBuf* B, char C)
+/* Append a character to a string buffer */
+{
+ unsigned NewLen = B->Len + 1;
+ if (NewLen > B->Allocated) {
+ SB_Realloc (B, NewLen);
+ }
+ B->Buf[B->Len] = C;
+ B->Len = NewLen;
+}
+
+
+
+void SB_AppendStr (StrBuf* B, const char* S)
+/* Append a string to the end of the string buffer */
+{
+ SB_AppendBuf (B, S, strlen (S));
+}
+
+
+
+void SB_AppendBuf (StrBuf* B, const char* S, unsigned Size)
+/* Append a character buffer to the end of the string buffer */
+{
+ unsigned NewLen = B->Len + Size;
+ if (NewLen > B->Allocated) {
+ SB_Realloc (B, NewLen);
+ }
+ memcpy (B->Buf + B->Len, S, Size);
+ B->Len = NewLen;
+}
+
+
+
+void SB_Copy (StrBuf* Target, const StrBuf* Source)
+/* Copy Source to Target, discarding the old contents of Target */
+{
+ if (Target->Allocated < Source->Allocated) {
+ SB_Realloc (Target, Source->Allocated);
+ }
+ memcpy (Target->Buf, Source->Buf, Source->Len);
+ Target->Len = Source->Len;
+}
+
+
+
+void SB_Append (StrBuf* Target, const StrBuf* Source)
+/* Append the contents of Source to Target */
+{
+ SB_AppendBuf (Target, Source->Buf, Source->Len);
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* strbuf.h */
+/* */
+/* Variable sized string buffers */
+/* */
+/* */
+/* */
+/* (C) 2001 Ullrich von Bassewitz */
+/* Wacholderweg 14 */
+/* D-70597 Stuttgart */
+/* EMail: uz@musoftware.de */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#ifndef STRBUF_H
+#define STRBUF_H
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+typedef struct StrBuf StrBuf;
+struct StrBuf {
+ unsigned Allocated;
+ unsigned Len;
+ char* Buf;
+};
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+StrBuf* InitStrBuf (StrBuf* B);
+/* Initialize a string buffer */
+
+void DoneStrBuf (StrBuf* B);
+/* Free the data of a string buffer (but not the struct itself) */
+
+StrBuf* NewStrBuf (void);
+/* Allocate, initialize and return a new StrBuf */
+
+void FreeStrBuf (StrBuf* B);
+/* Free a string buffer */
+
+void SB_Terminate (StrBuf* B);
+/* Zero terminate the given string buffer. NOTE: The terminating zero is not
+ * accounted for in B->Len, if you want that, you have to use AppendChar!
+ */
+
+void SB_AppendChar (StrBuf* B, char C);
+/* Append a character to a string buffer */
+
+void SB_AppendStr (StrBuf* B, const char* S);
+/* Append a string to the end of the string buffer */
+
+void SB_AppendBuf (StrBuf* B, const char* S, unsigned Size);
+/* Append a character buffer to the end of the string buffer */
+
+void SB_Copy (StrBuf* Target, const StrBuf* Source);
+/* Copy Source to Target, discarding the old contents of Target */
+
+void SB_Append (StrBuf* Target, const StrBuf* Source);
+/* Append the contents of Source to Target */
+
+
+
+/* End of strbuf.h */
+
+#endif
+
+
+
projects / cc65 / commitdiff