1 /*****************************************************************************/
5 /* Variable sized string buffers */
9 /* (C) 2001 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
44 /*****************************************************************************/
46 /*****************************************************************************/
50 static void SB_Realloc (StrBuf* B, unsigned NewSize)
51 /* Reallocate the string buffer space, make sure at least NewSize bytes are
55 /* Get the current size, use a minimum of 8 bytes */
56 unsigned NewAllocated = B->Allocated;
57 if (NewAllocated == 0) {
61 /* Round up to the next power of two */
62 while (NewAllocated < NewSize) {
66 /* Reallocate the buffer */
67 B->Buf = xrealloc (B->Buf, NewAllocated);
68 B->Allocated = NewAllocated;
73 /*****************************************************************************/
75 /*****************************************************************************/
79 StrBuf* InitStrBuf (StrBuf* B)
80 /* Initialize a string buffer */
90 void DoneStrBuf (StrBuf* B)
91 /* Free the data of a string buffer (but not the struct itself) */
101 StrBuf* NewStrBuf (void)
102 /* Allocate, initialize and return a new StrBuf */
104 /* Allocate a new string buffer */
105 StrBuf* B = xmalloc (sizeof (StrBuf));
107 /* Initialize the struct... */
110 /* ...and return it */
116 void FreeStrBuf (StrBuf* B)
117 /* Free a string buffer */
119 /* Don't use Done here, since we won't use the struct later */
126 void SB_Terminate (StrBuf* B)
127 /* Zero terminate the given string buffer. NOTE: The terminating zero is not
128 * accounted for in B->Len, if you want that, you have to use AppendChar!
131 unsigned NewLen = B->Len + 1;
132 if (NewLen > B->Allocated) {
133 SB_Realloc (B, NewLen);
135 B->Buf[B->Len] = '\0';
140 void SB_AppendChar (StrBuf* B, char C)
141 /* Append a character to a string buffer */
143 unsigned NewLen = B->Len + 1;
144 if (NewLen > B->Allocated) {
145 SB_Realloc (B, NewLen);
153 void SB_AppendStr (StrBuf* B, const char* S)
154 /* Append a string to the end of the string buffer */
156 SB_AppendBuf (B, S, strlen (S));
161 void SB_AppendBuf (StrBuf* B, const char* S, unsigned Size)
162 /* Append a character buffer to the end of the string buffer */
164 unsigned NewLen = B->Len + Size;
165 if (NewLen > B->Allocated) {
166 SB_Realloc (B, NewLen);
168 memcpy (B->Buf + B->Len, S, Size);
174 void SB_Copy (StrBuf* Target, const StrBuf* Source)
175 /* Copy Source to Target, discarding the old contents of Target */
177 if (Target->Allocated < Source->Allocated) {
178 SB_Realloc (Target, Source->Allocated);
180 memcpy (Target->Buf, Source->Buf, Source->Len);
181 Target->Len = Source->Len;
186 void SB_Append (StrBuf* Target, const StrBuf* Source)
187 /* Append the contents of Source to Target */
189 SB_AppendBuf (Target, Source->Buf, Source->Len);