Add TRANSIENTP element for automatic free of temporary storage.

Clear blob contents on free.

diff --git a/ez-blob-compiler.c b/ez-blob-compiler.c
index cb9a41f..bf9b1f9 100644 (file)
--- a/ez-blob-compiler.c
+++ b/ez-blob-compiler.c
@@ -75,6 +75,8 @@ void export_size(const ez_blob_desc *desc, const char *name) {
                case EZ_BLOB_INT8 | EZ_BLOB_CSTRING:
                        strings = 1;
                        break;
+               case EZ_BLOB_TRANSIENTP:
+                       break;
                default:
                        fprintf(stderr, "Unsupported type: %d\n", d->bd_type);
                        abort();
@@ -93,6 +95,7 @@ void export_size(const ez_blob_desc *desc, const char *name) {
                        case EZ_BLOB_INT64:
                        case EZ_BLOB_FLOAT32:
                        case EZ_BLOB_FLOAT64:
+                       case EZ_BLOB_TRANSIENTP:
                                break;
                        case EZ_BLOB_INT8 | EZ_BLOB_CSTRING:
                                if (doinline) {
@@ -156,6 +159,8 @@ void export_encode(const ez_blob_desc *desc, const char *name) {
                                printf("\tb = string_encode(b, *(const char **)(p + %d));\n", d->bd_offset);
                        }
                        break;
+               case EZ_BLOB_TRANSIENTP:
+                       break;
                default:
                        fprintf(stderr, "Unsupported type: %d\n", d->bd_type);
                        abort();
@@ -219,6 +224,8 @@ void export_decode(const ez_blob_desc *desc, const char *name, int doos) {
                                        printf("\tb = string_decode(b, (char **)(p + %d));\n", d->bd_offset);
                        }
                        break;
+               case EZ_BLOB_TRANSIENTP:
+                       break;
                default:
                        fprintf(stderr, "Unsupported type: %d\n", d->bd_type);
                        abort();

diff --git a/ez-blob.c b/ez-blob.c
index 683ac4e..4a563b6 100644 (file)
--- a/ez-blob.c
+++ b/ez-blob.c
@@ -32,7 +32,7 @@ void ez_blob_free_raw(const ez_blob_desc *desc, void *p) {
                void *v = p + d->bd_offset;
                int st = d->bd_type & EZ_BLOB_STORAGE;
                int dt = d->bd_type & EZ_BLOB_TYPE;
-               
+
                switch (st) {
                case EZ_BLOB_SINGLE:
                        if (dt == EZ_BLOB_STRUCT)
@@ -47,6 +47,7 @@ void ez_blob_free_raw(const ez_blob_desc *desc, void *p) {
                        }
                        break;
                case EZ_BLOB_CSTRING:
+               case EZ_BLOB_TRANSIENTP:
                        free(((char **)v)[0]);
                        break;
                case EZ_BLOB_VECTOR:
@@ -80,6 +81,7 @@ void ez_blob_free_raw(const ez_blob_desc *desc, void *p) {
                        break;
                }
        }
+       memset(p, 0, desc->bd_offset);
 }
 
 void ez_blob_free(const ez_blob_desc *d, void *p) {

diff --git a/ez-blob.h b/ez-blob.h
index dcb4eeb..ce17272 100644 (file)
--- a/ez-blob.h
+++ b/ez-blob.h
@@ -81,6 +81,7 @@ typedef enum ez_blob_desc_type {
        EZ_BLOB_SINGLE = 0x00,          // the value at bd_offset
        EZ_BLOB_SINGLEP = 0x10,         // pointer to value at bd_offset
        EZ_BLOB_CSTRING = 0x20,         // 0-terminated string pointer
+       EZ_BLOB_TRANSIENTP = 0x30,      // transient pointer which needs to be free()'d on free
 
        EZ_BLOB_VECTOR = 0x40,          // ez_blob at bd_offset
        EZ_BLOB_VECTORP = 0x50,         // pointer to ez_blob at bd_offset
@@ -134,6 +135,8 @@ typedef struct ez_blob {
 #define EZ_BLOB_STRING(s, id, f) { EZ_BLOB_INT8 | EZ_BLOB_CSTRING, id, offsetof(s, f), #f }
 #define EZ_BLOB_STRINGN(s, id, f) { EZ_BLOB_INT8 | EZ_BLOB_CSTRING | EZ_BLOB_ISNULLABLE, id, offsetof(s, f), #f }
 
+#define EZ_BLOB_TRANSIENTP(s, id, f) { EZ_BLOB_TRANSIENTP, id, offsetof(s, f), #f }
+
 #define EZ_BLOB_STRUCT(s, id, f, other) {  EZ_BLOB_STRUCT | EZ_BLOB_SINGLE, id, offsetof(s, f), #f, .bd_table = other }
 #define EZ_BLOB_STRUCTP(s, id, f, other) {  EZ_BLOB_STRUCT | EZ_BLOB_SINGLEP, id, offsetof(s, f), #f, .bd_table = other }
 #define EZ_BLOB_STRUCTPN(s, id, f, other) {  EZ_BLOB_STRUCT | EZ_BLOB_SINGLEP | EZ_BLOB_ISNULLABLE, id, offsetof(s, f), #f, .bd_table = other }