Giant const-correctness patch of doom!

[PuTTY.git] / misc.c

diff --git a/misc.c b/misc.c
index 94b5ac8ab986e240a3a768996399b294dbe7016f..37c0207ef79251a98f90a4e398a92d9460039716 100644 (file)
--- a/misc.c
+++ b/misc.c
@@ -9,6 +9,7 @@
 #include <ctype.h>
 #include <assert.h>
 #include "putty.h"
+#include "misc.h"
 
 /*
  * Parse a string block size specification. This is approximately a
@@ -174,7 +175,7 @@ int main(void)
     return fails != 0 ? 1 : 0;
 }
 /* Stubs to stop the rest of this module causing compile failures. */
-void modalfatalbox(char *fmt, ...) {}
+void modalfatalbox(const char *fmt, ...) {}
 int conf_get_int(Conf *conf, int primary) { return 0; }
 char *conf_get_str(Conf *conf, int primary) { return NULL; }
 #endif /* TEST_HOST_STRFOO */
@@ -472,11 +473,29 @@ char *fgetline(FILE *fp)
     return ret;
 }
 
+/*
+ * Perl-style 'chomp', for a line we just read with fgetline. Unlike
+ * Perl chomp, however, we're deliberately forgiving of strange
+ * line-ending conventions. Also we forgive NULL on input, so you can
+ * just write 'line = chomp(fgetline(fp));' and not bother checking
+ * for NULL until afterwards.
+ */
+char *chomp(char *str)
+{
+    if (str) {
+        int len = strlen(str);
+        while (len > 0 && (str[len-1] == '\r' || str[len-1] == '\n'))
+            len--;
+        str[len] = '\0';
+    }
+    return str;
+}
+
 /* ----------------------------------------------------------------------
  * Core base64 encoding and decoding routines.
  */
 
-void base64_encode_atom(unsigned char *data, int n, char *out)
+void base64_encode_atom(const unsigned char *data, int n, char *out)
 {
     static const char base64_chars[] =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
@@ -500,7 +519,7 @@ void base64_encode_atom(unsigned char *data, int n, char *out)
        out[3] = '=';
 }
 
-int base64_decode_atom(char *atom, unsigned char *out)
+int base64_decode_atom(const char *atom, unsigned char *out)
 {
     int vals[4];
     int i, v, len;
@@ -811,9 +830,9 @@ void safefree(void *ptr)
  */
 
 #ifdef DEBUG
-extern void dputs(char *);             /* defined in per-platform *misc.c */
+extern void dputs(const char *); /* defined in per-platform *misc.c */
 
-void debug_printf(char *fmt, ...)
+void debug_printf(const char *fmt, ...)
 {
     char *buf;
     va_list ap;
@@ -826,10 +845,10 @@ void debug_printf(char *fmt, ...)
 }
 
 
-void debug_memdump(void *buf, int len, int L)
+void debug_memdump(const void *buf, int len, int L)
 {
     int i;
-    unsigned char *p = buf;
+    const unsigned char *p = buf;
     char foo[17];
     if (L) {
        int delta;
@@ -1035,3 +1054,36 @@ int smemeq(const void *av, const void *bv, size_t len)
      * we want to return 1, so then we can just shift down. */
     return (0x100 - val) >> 8;
 }
+
+int match_ssh_id(int stringlen, const void *string, const char *id)
+{
+    int idlen = strlen(id);
+    return (idlen == stringlen && !memcmp(string, id, idlen));
+}
+
+void *get_ssh_string(int *datalen, const void **data, int *stringlen)
+{
+    void *ret;
+    int len;
+
+    if (*datalen < 4)
+        return NULL;
+    len = GET_32BIT_MSB_FIRST((const unsigned char *)*data);
+    if (*datalen < len+4)
+        return NULL;
+    ret = (void *)((const char *)*data + 4);
+    *datalen -= len + 4;
+    *data = (const char *)*data + len + 4;
+    *stringlen = len;
+    return ret;
+}
+
+int get_ssh_uint32(int *datalen, const void **data, unsigned *ret)
+{
+    if (*datalen < 4)
+        return FALSE;
+    *ret = GET_32BIT_MSB_FIRST((const unsigned char *)*data);
+    *datalen -= 4;
+    *data = (const char *)*data + 4;
+    return TRUE;
+}