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-rw-r--r--WWW/Library/Implementation/HTChunk.h228
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diff --git a/WWW/Library/Implementation/HTChunk.h b/WWW/Library/Implementation/HTChunk.h
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+/*
+ * $LynxId: HTChunk.h,v 1.21 2020/01/21 22:02:43 tom Exp $
+ *
+ * HTChunk: Flexible array handling for libwww
+ * CHUNK HANDLING:
+ * FLEXIBLE ARRAYS
+ *
+ * This module implements a flexible array. It is a general utility module. A
+ * chunk is a structure which may be extended. These routines create and
+ * append data to chunks, automatically reallocating them as necessary.
+ *
+ */
+#ifndef HTCHUNK_H
+#define HTCHUNK_H 1
+
+#ifndef HTUTILS_H
+#include <HTUtils.h>
+#endif
+
+#include <UCMap.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ typedef struct _HTChunk HTChunk;
+
+ struct _HTChunk {
+ int size; /* In bytes */
+ int growby; /* Allocation unit in bytes */
+ int allocated; /* Current size of *data */
+ char *data; /* Pointer to malloc'd area or 0 */
+ int failok; /* allowed to fail without exiting program? */
+ HTChunk *next; /* pointer to the next chunk */
+ };
+
+/*
+ * Initialize a chunk's allocation data and allocation-increment.
+ */
+ extern void HTChunkInit(HTChunk *ch, int grow);
+
+/*
+ *
+ * Create new chunk
+ *
+ * ON ENTRY,
+ *
+ * growby The number of bytes to allocate at a time when the chunk
+ * is later extended. Arbitrary but normally a trade-off
+ * of time vs memory.
+ *
+ * ON EXIT,
+ *
+ * returns A chunk pointer to the new chunk,
+ *
+ */
+
+ extern HTChunk *HTChunkCreate(int growby);
+
+/*
+ * Create a chunk for which an allocation error is not a fatal application
+ * error if failok != 0, but merely resets the chunk. When using a chunk
+ * created this way, the caller should always check whether the contents
+ * are ok each time after data have been appended.
+ * The create call may also fail and will return NULL in that case. - kw
+ */
+ extern HTChunk *HTChunkCreateMayFail(int growby, int failok);
+
+/*
+ * Like HTChunkCreate but with initial allocation - kw
+ *
+ */
+ extern HTChunk *HTChunkCreate2(int growby, size_t needed);
+
+/*
+ *
+ * Free a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * ON EXIT,
+ *
+ * ch is invalid and may not be used.
+ *
+ */
+
+ extern void HTChunkFree(HTChunk *ch);
+
+/*
+ *
+ * Clear a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * ON EXIT,
+ *
+ * *ch The size of the chunk is zero.
+ *
+ */
+
+ extern void HTChunkClear(HTChunk *ch);
+
+/*
+ *
+ * Realloc a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * growby growby
+ *
+ * ON EXIT,
+ *
+ * *ch Expanded by growby
+ *
+ */
+
+ extern BOOL HTChunkRealloc(HTChunk *ch, int growby);
+
+/*
+ *
+ * Ensure a chunk has a certain space in
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * s The size required
+ *
+ * ON EXIT,
+ *
+ * *ch Has size at least s
+ *
+ */
+
+ extern void HTChunkEnsure(HTChunk *ch, int s);
+
+/*
+ *
+ * Append a character to a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * c The character to be appended
+ *
+ * ON EXIT,
+ *
+ * *ch Is one character bigger
+ *
+ */
+ extern void HTChunkPutc(HTChunk *ch, unsigned c);
+
+ extern void HTChunkPutb(HTChunk *ch, const char *b, int l);
+
+ extern void HTChunkPutUtf8Char(HTChunk *ch, UCode_t code);
+
+/*
+ * Append a string to a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * str Points to a zero-terminated string to be appended
+ *
+ * ON EXIT,
+ *
+ * *ch Is bigger by strlen(str)
+ *
+ */
+
+ extern void HTChunkPuts(HTChunk *ch, const char *str);
+
+/*
+ *
+ * Append a zero character to a chunk
+ *
+ */
+
+/*
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * ON EXIT,
+ *
+ * *ch Is one character bigger
+ *
+ */
+
+ extern void HTChunkTerminate(HTChunk *ch);
+
+/* like the above but no realloc: extend to another chunk if necessary */
+/*
+ *
+ * Append a character (string, data) to a chunk
+ *
+ * ON ENTRY,
+ *
+ * ch A valid chunk pointer made by HTChunkCreate()
+ *
+ * c The character to be appended
+ *
+ * ON EXIT,
+ *
+ * returns original chunk or a pointer to the new chunk
+ * (original chunk is referenced to the new one
+ * by the field 'next')
+ *
+ */
+ extern HTChunk *HTChunkPutc2(HTChunk *ch, int c);
+ extern HTChunk *HTChunkPuts2(HTChunk *ch, const char *str);
+ extern HTChunk *HTChunkPutb2(HTChunk *ch, const char *b, int l);
+
+/* New pool infrastructure: UNlike the above, store data using alignment */
+ extern HTChunk *HTChunkPutb0(HTChunk *ch, const char *b, int l);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* HTCHUNK_H */