Add RStrBuf api

libr/include/r_util.h

@@ -602,6 +602,19 @@ R_API void r_strht_clear(RStrHT *s);
 R_API void r_strht_del(RStrHT *s, const char *key);
 R_API int r_is_heap (void *p);
 
+
+typedef struct {
+	int len;
+	char *ptr;
+	char buf[64];
+} RStrBuf;
+
+R_API RStrBuf *r_strbuf_new();
+R_API void r_strbuf_set(RStrBuf *sb, const char *s);
+R_API void r_strbuf_append(RStrBuf *sb, const char *s);
+R_API char *r_strbuf_get(RStrBuf *sb);
+R_API void r_strbuf_free(RStrBuf *sb);
+
 #ifdef __cplusplus
 }
 #endif

libr/util/Makefile

@@ -8,7 +8,7 @@ OBJS+=prof.o cache.o sys.o buf.o w32-sys.o base64.o base85.o name.o
 OBJS+=list.o flist.o ht.o ht64.o mixed.o btree.o chmod.o graph.o
 OBJS+=regex/regcomp.o regex/regerror.o regex/regexec.o uleb128.o
 OBJS+=sandbox.o calc.o thread.o lock.o strpool.o bitmap.o strht.o
-OBJS+=p_date.o p_format.o print.o p_seven.o slist.o randomart.o
+OBJS+=p_date.o p_format.o print.o p_seven.o slist.o randomart.o strbuf.o
 
 # DO NOT BUILD r_big api (not yet used and its buggy)
 ifeq (1,0)

libr/util/str.c

@@ -1237,4 +1237,3 @@ R_API void r_str_truncate_cmd(char *string) {
 	}
 }
 
-// STATIC/DYNAMIC STRINGS API

libr/util/strbuf.c

@@ -0,0 +1,50 @@
+/* radare - LGPL - Copyright 2013 - pancake */
+
+// STATIC/DYNAMIC STRINGS API
+#include "r_types.h"
+#include "r_util.h"
+#include <stdio.h>
+
+R_API RStrBuf *r_strbuf_new() {
+	return R_NEW0 (RStrBuf);
+}
+
+R_API void r_strbuf_set(RStrBuf *sb, const char *s) {
+	int l = strlen (s);
+	if (l>=sizeof (sb->buf)) {
+		free (sb->ptr);
+		sb->ptr = malloc (l+1);
+		memcpy (sb->ptr, s, l+1);
+	} else {
+		sb->ptr = NULL;
+		memcpy (sb->buf, s, l+1);
+	}
+	sb->len = l;
+}
+
+R_API void r_strbuf_append(RStrBuf *sb, const char *s) {
+	int l = strlen (s);
+	if ((sb->len+l+1)<sizeof (sb->buf)) {
+		strcpy (sb->buf+sb->len, s);
+	} else {
+		char *p = malloc (sb->len+l+1);
+		strcpy (p, sb->ptr?sb->ptr:sb->buf);
+		strcpy (p+sb->len, s);
+	}
+	sb->len += l;
+}
+
+R_API char *r_strbuf_get(RStrBuf *sb) {
+	if (sb) {
+		if (sb->ptr)
+			return sb->ptr;
+		return sb->buf;
+	}
+	return NULL;
+}
+
+R_API void r_strbuf_free(RStrBuf *sb) {
+	if (sb && sb->ptr)
+		free (sb->ptr);
+	free (sb);
+}