Add chunk.h

Author: vmg

src/chunk.h

@@ -0,0 +1,92 @@
+#ifndef _CHUNK_H_
+#define _CHUNK_H_
+
+#include <string.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "buffer.h"
+
+typedef struct {
+	const unsigned char *data;
+	int len;
+	int alloc;
+} chunk;
+
+static inline void chunk_free(chunk *c)
+{
+	if (c->alloc)
+		free((char *)c->data);
+
+	c->data = NULL;
+	c->alloc = 0;
+	c->len = 0;
+}
+
+static inline void chunk_ltrim(chunk *c)
+{
+	assert(!c->alloc);
+
+	while (c->len && isspace(c->data[0])) {
+		c->data++;
+		c->len--;
+	}
+}
+
+static inline void chunk_rtrim(chunk *c)
+{
+	while (c->len > 0) {
+		if (!isspace(c->data[c->len - 1]))
+			break;
+
+		c->len--;
+	}
+}
+
+static inline void chunk_trim(chunk *c)
+{
+	chunk_ltrim(c);
+	chunk_rtrim(c);
+}
+
+static inline int chunk_strchr(chunk *ch, int c, int offset)
+{
+	const unsigned char *p = memchr(ch->data + offset, c, ch->len - offset);
+	return p ? (int)(p - ch->data) : ch->len;
+}
+
+static inline unsigned char *chunk_to_cstr(chunk *c)
+{
+	unsigned char *str;
+
+	str = malloc(c->len + 1);
+	memcpy(str, c->data, c->len);
+	str[c->len] = 0;
+
+	return str;
+}
+
+static inline chunk chunk_literal(const char *data)
+{
+	chunk c = {(const unsigned char *)data, data ? strlen(data) : 0, 0};
+	return c;
+}
+
+static inline chunk chunk_dup(const chunk *ch, int pos, int len)
+{
+	chunk c = {ch->data + pos, len, 0};
+	return c;
+}
+
+static inline chunk chunk_buf_detach(gh_buf *buf)
+{
+	chunk c;
+
+	c.len = buf->size;
+	c.data = gh_buf_detach(buf);
+	c.alloc = 1;
+
+	return c;
+}
+
+#endif