Invent a win_strerror() function which behaves as much like Unix

[u/mdw/putty] / windows / winmisc.c

diff --git a/windows/winmisc.c b/windows/winmisc.c
index d05a07a..525d52c 100644 (file)
--- a/windows/winmisc.c
+++ b/windows/winmisc.c
@@ -14,28 +14,69 @@ char *platform_get_x_display(void) {
     return dupstr(getenv("DISPLAY"));
 }
 
-Filename filename_from_str(const char *str)
+Filename *filename_from_str(const char *str)
 {
-    Filename ret;
-    strncpy(ret.path, str, sizeof(ret.path));
-    ret.path[sizeof(ret.path)-1] = '\0';
+    Filename *ret = snew(Filename);
+    ret->path = dupstr(str);
     return ret;
 }
 
+Filename *filename_copy(const Filename *fn)
+{
+    return filename_from_str(fn->path);
+}
+
 const char *filename_to_str(const Filename *fn)
 {
     return fn->path;
 }
 
-int filename_equal(Filename f1, Filename f2)
+int filename_equal(const Filename *f1, const Filename *f2)
+{
+    return !strcmp(f1->path, f2->path);
+}
+
+int filename_is_null(const Filename *fn)
 {
-    return !strcmp(f1.path, f2.path);
+    return !*fn->path;
 }
 
-int filename_is_null(Filename fn)
+void filename_free(Filename *fn)
+{
+    sfree(fn->path);
+    sfree(fn);
+}
+
+int filename_serialise(const Filename *f, void *vdata)
+{
+    char *data = (char *)vdata;
+    int len = strlen(f->path) + 1;     /* include trailing NUL */
+    if (data) {
+        strcpy(data, f->path);
+    }
+    return len;
+}
+Filename *filename_deserialise(void *vdata, int maxsize, int *used)
 {
-    return !*fn.path;
+    char *data = (char *)vdata;
+    char *end;
+    end = memchr(data, '\0', maxsize);
+    if (!end)
+        return NULL;
+    end++;
+    *used = end - data;
+    return filename_from_str(data);
+}
+
+#ifndef NO_SECUREZEROMEMORY
+/*
+ * Windows implementation of smemclr (see misc.c) using SecureZeroMemory.
+ */
+void smemclr(void *b, size_t n) {
+    if (b && n > 0)
+        SecureZeroMemory(b, n);
 }
+#endif
 
 char *get_username(void)
 {
@@ -132,6 +173,69 @@ HMODULE load_system32_dll(const char *libname)
     return ret;
 }
 
+/*
+ * A tree234 containing mappings from system error codes to strings.
+ */
+
+struct errstring {
+    int error;
+    char *text;
+};
+
+static int errstring_find(void *av, void *bv)
+{
+    int *a = (int *)av;
+    struct errstring *b = (struct errstring *)bv;
+    if (*a < b->error)
+        return -1;
+    if (*a > b->error)
+        return +1;
+    return 0;
+}
+static int errstring_compare(void *av, void *bv)
+{
+    struct errstring *a = (struct errstring *)av;
+    return errstring_find(&a->error, bv);
+}
+
+static tree234 *errstrings = NULL;
+
+const char *win_strerror(int error)
+{
+    struct errstring *es;
+
+    if (!errstrings)
+        errstrings = newtree234(errstring_compare);
+
+    es = find234(errstrings, &error, errstring_find);
+
+    if (!es) {
+        int bufsize, bufused;
+
+        es = snew(struct errstring);
+        es->error = error;
+        /* maximum size for FormatMessage is 64K */
+        bufsize = 65535;
+        es->text = snewn(bufsize, char);
+        if (!FormatMessage((FORMAT_MESSAGE_FROM_SYSTEM |
+                            FORMAT_MESSAGE_IGNORE_INSERTS), NULL, error,
+                           MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                           es->text + bufused, bufsize - bufused, NULL)) {
+            sprintf(es->text,
+                    "Windows error code %d (and FormatMessage returned %d)", 
+                    error, GetLastError());
+        } else {
+            int len = strlen(es->text);
+            if (len > 0 && es->text[len-1] == '\n')
+                es->text[len-1] = '\0';
+        }
+        es->text = sresize(es->text, strlen(es->text) + 1, char);
+        add234(errstrings, es);
+    }
+
+    return es->text;
+}
+
 #ifdef DEBUG
 static FILE *debug_fp = NULL;
 static HANDLE debug_hdl = INVALID_HANDLE_VALUE;
@@ -379,3 +483,51 @@ void *minefield_c_realloc(void *p, size_t size)
 }
 
 #endif                         /* MINEFIELD */
+
+FontSpec *fontspec_new(const char *name,
+                        int bold, int height, int charset)
+{
+    FontSpec *f = snew(FontSpec);
+    f->name = dupstr(name);
+    f->isbold = bold;
+    f->height = height;
+    f->charset = charset;
+    return f;
+}
+FontSpec *fontspec_copy(const FontSpec *f)
+{
+    return fontspec_new(f->name, f->isbold, f->height, f->charset);
+}
+void fontspec_free(FontSpec *f)
+{
+    sfree(f->name);
+    sfree(f);
+}
+int fontspec_serialise(FontSpec *f, void *vdata)
+{
+    char *data = (char *)vdata;
+    int len = strlen(f->name) + 1;     /* include trailing NUL */
+    if (data) {
+        strcpy(data, f->name);
+        PUT_32BIT_MSB_FIRST(data + len, f->isbold);
+        PUT_32BIT_MSB_FIRST(data + len + 4, f->height);
+        PUT_32BIT_MSB_FIRST(data + len + 8, f->charset);
+    }
+    return len + 12;                   /* also include three 4-byte ints */
+}
+FontSpec *fontspec_deserialise(void *vdata, int maxsize, int *used)
+{
+    char *data = (char *)vdata;
+    char *end;
+    if (maxsize < 13)
+        return NULL;
+    end = memchr(data, '\0', maxsize-12);
+    if (!end)
+        return NULL;
+    end++;
+    *used = end - data + 12;
+    return fontspec_new(data,
+                        GET_32BIT_MSB_FIRST(end),
+                        GET_32BIT_MSB_FIRST(end + 4),
+                        GET_32BIT_MSB_FIRST(end + 8));
+}