move read_base64 to libbb/uuencode.c

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

3 files changed, 77 insertions, 82 deletions

diff --git a/libbb/base64.c b/libbb/base64.c
deleted file mode 100644
index b9d47ae08..000000000
--- a/libbb/base64.c
+++ /dev/null
@@ -1,78 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Utility routines.
- *
- * Copyright 2003, Glenn McGrath
- * Copyright 2010, Denys Vlasenko
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-#include "libbb.h"
-
-//kbuild:lib-y += base64.o
-
-void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags)
-{
-/* Note that EOF _can_ be passed as exit_char too */
-#define exit_char    ((int)(signed char)flags)
-#define uu_style_end (flags & BASE64_FLAG_UUEND)
-
-        int term_count = 0;
-
-        while (1) {
-                unsigned char translated[4];
-                int count = 0;
-
-                /* Process one group of 4 chars */
-                while (count < 4) {
-                        char *table_ptr;
-                        int ch;
-
-                        /* Get next _valid_ character.
-                         * bb_uuenc_tbl_base64[] contains this string:
-                         *  0         1         2         3         4         5         6
-                         *  012345678901234567890123456789012345678901234567890123456789012345
-                         * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n"
-                         */
-                        do {
-                                ch = fgetc(src_stream);
-                                if (ch == exit_char && count == 0)
-                                        return;
-                                if (ch == EOF)
-                                        bb_error_msg_and_die("truncated base64 input");
-                                table_ptr = strchr(bb_uuenc_tbl_base64, ch);
-//TODO: add BASE64_FLAG_foo to die on bad char?
-//Note that then we may need to still allow '\r' (for mail processing)
-                        } while (!table_ptr);
-
-                        /* Convert encoded character to decimal */
-                        ch = table_ptr - bb_uuenc_tbl_base64;
-
-                        if (ch == 65 /* '\n' */) {
-                                /* Terminating "====" line? */
-                                if (uu_style_end && term_count == 4)
-                                        return; /* yes */
-                                continue;
-                        }
-                        /* ch is 64 if char was '=', otherwise 0..63 */
-                        translated[count] = ch & 63; /* 64 -> 0 */
-                        if (ch == 64) {
-                                term_count++;
-                                break;
-                        }
-                        term_count = 0;
-                        count++;
-                }
-
-                /* Merge 6 bit chars to 8 bit.
-                 * count can be < 4 when we decode the tail:
-                 * "eQ==" -> "y", not "y NUL NUL"
-                 */
-                if (count > 1)
-                        fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
-                if (count > 2)
-                        fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
-                if (count > 3)
-                        fputc(translated[2] << 6 | translated[3], dst_stream);
-        } /* while (1) */
-}
diff --git a/libbb/uuencode.c b/libbb/uuencode.c
index 181f49de0..03e708fd5 100644
--- a/libbb/uuencode.c
+++ b/libbb/uuencode.c
@@ -1,6 +1,8 @@
 /* vi: set sw=4 ts=4: */
 /*
- * Copyright 2006 Rob Landley <rob@landley.net>
+ * Copyright 2003, Glenn McGrath
+ * Copyright 2006, Rob Landley <rob@landley.net>
+ * Copyright 2010, Denys Vlasenko
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
@@ -69,3 +71,75 @@ void FAST_FUNC bb_uuencode(char *p, const void *src, int length, const char *tbl
                 length++;
         }
 }
+
+/*
+ * Decode base64 encoded stream.
+ * Can stop on EOF, specified char, or on uuencode-style "====" line:
+ * flags argument controls it.
+ */
+void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags)
+{
+/* Note that EOF _can_ be passed as exit_char too */
+#define exit_char    ((int)(signed char)flags)
+#define uu_style_end (flags & BASE64_FLAG_UU_STOP)
+
+        int term_count = 0;
+
+        while (1) {
+                unsigned char translated[4];
+                int count = 0;
+
+                /* Process one group of 4 chars */
+                while (count < 4) {
+                        char *table_ptr;
+                        int ch;
+
+                        /* Get next _valid_ character.
+                         * bb_uuenc_tbl_base64[] contains this string:
+                         *  0         1         2         3         4         5         6
+                         *  012345678901234567890123456789012345678901234567890123456789012345
+                         * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n"
+                         */
+                        do {
+                                ch = fgetc(src_stream);
+                                if (ch == exit_char && count == 0)
+                                        return;
+                                if (ch == EOF)
+                                        bb_error_msg_and_die("truncated base64 input");
+                                table_ptr = strchr(bb_uuenc_tbl_base64, ch);
+//TODO: add BASE64_FLAG_foo to die on bad char?
+//Note that then we may need to still allow '\r' (for mail processing)
+                        } while (!table_ptr);
+
+                        /* Convert encoded character to decimal */
+                        ch = table_ptr - bb_uuenc_tbl_base64;
+
+                        if (ch == 65 /* '\n' */) {
+                                /* Terminating "====" line? */
+                                if (uu_style_end && term_count == 4)
+                                        return; /* yes */
+                                term_count = 0;
+                                continue;
+                        }
+                        /* ch is 64 if char was '=', otherwise 0..63 */
+                        translated[count] = ch & 63; /* 64 -> 0 */
+                        if (ch == 64) {
+                                term_count++;
+                                break;
+                        }
+                        count++;
+                        term_count = 0;
+                }
+
+                /* Merge 6 bit chars to 8 bit.
+                 * count can be < 4 when we decode the tail:
+                 * "eQ==" -> "y", not "y NUL NUL"
+                 */
+                if (count > 1)
+                        fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
+                if (count > 2)
+                        fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
+                if (count > 3)
+                        fputc(translated[2] << 6 | translated[3], dst_stream);
+        } /* while (1) */
+}
diff --git a/mailutils/mail.c b/mailutils/mail.c
index 89db66166..9b4bebce5 100644
--- a/mailutils/mail.c
+++ b/mailutils/mail.c
@@ -116,16 +116,15 @@ void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol)
                 SRC_BUF_SIZE = 45,  /* This *MUST* be a multiple of 3 */
                 DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
         };
-
 #define src_buf text
+        char src[SRC_BUF_SIZE];
         FILE *fp = fp;
         ssize_t len = len;
         char dst_buf[DST_BUF_SIZE + 1];
 
         if (fname) {
                 fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : (FILE *)text;
-                src_buf = bb_common_bufsiz1;
-        // N.B. strlen(NULL) segfaults!
+                src_buf = src;
         } else if (text) {
                 // though we do not call uuencode(NULL, NULL) explicitly
                 // still we do not want to break things suddenly