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authorRob Landley <rob@landley.net>2013-03-28 23:33:27 -0500
committerRob Landley <rob@landley.net>2013-03-28 23:33:27 -0500
commit28df7d57c5b5ae67edd4bc70c00f5dabf9d61a4a (patch)
tree0394c91661cd8d282a645f7370541687f13f4dbe /toys/pending/uudecode.c
parentf529a550a4de36fcbbf3cd4c2d189be8a4535154 (diff)
downloadtoybox-28df7d57c5b5ae67edd4bc70c00f5dabf9d61a4a.tar.gz
More uudecode cleanup.
Diffstat (limited to 'toys/pending/uudecode.c')
-rw-r--r--toys/pending/uudecode.c98
1 files changed, 36 insertions, 62 deletions
diff --git a/toys/pending/uudecode.c b/toys/pending/uudecode.c
index 576b8faf..4747a036 100644
--- a/toys/pending/uudecode.c
+++ b/toys/pending/uudecode.c
@@ -24,18 +24,6 @@ GLOBALS(
char *o;
)
-static inline signed char uudecode_b64_1byte(char in)
-{
- if (in >= 'A' && in <= 'Z') return in-'A';
- if (in >= 'a' && in <= 'z') return in-'a'+26;
- if (in >= '0' && in <= '9') return in-'0'+52;
- if (in == '+') return 62;
- if (in == '/') return 63;
-
- return -1;
-};
-
-
static int uudecode_b64_4bytes(char *out, char *in)
{
int i, len = 3;
@@ -44,15 +32,27 @@ static int uudecode_b64_4bytes(char *out, char *in)
for (i=0; i<4; i++) {
int c = in[i];
- if (c == '=') len--;
- else if (len != 3) len = 0;
- if (!len) error_exit("bad input");
+ if (c == '=') {
+ len--;
+ c = 'A';
+ } else if (len != 3) len = 0;
+ if (!len) goto bad;
- x |= uudecode_b64_1byte(c) << (6*(3-i));
+ if (c >= 'A' && c <= 'Z') c -= 'A';
+ else if (c >= 'a' && c <= 'z') c += 26 - 'a';
+ else if (c >= '0' && c <= '9') c += 52 - '0';
+ else if (c == '+') c = 62;
+ else if (c == '/') c =63;
+ else goto bad;
+
+ x |= c << (6*(3-i));
if (i && i <= len) *(out++) = (x>>(8*(3-i))) & 0xff;
}
return len;
+
+bad:
+ error_exit("bad input");
}
static void uudecode_b64_line(int ofd, char *in, int ilen)
@@ -68,20 +68,6 @@ static void uudecode_b64_line(int ofd, char *in, int ilen)
};
}
-static void uudecode_b64(int ifd, int ofd)
-{
- int len;
- char *line;
-
- while ((line = get_line(ifd)) != NULL) {
- if ((len = strlen(line)) < 4) continue;
- if (!strncmp(line, "====", 4)) return;
- uudecode_b64_line(ofd,line,len);
- free(line);
- }
-}
-
-
static void uudecode_uu_4bytes(char *out, char *in, int len)
{
unsigned int i,x=0;
@@ -93,7 +79,7 @@ static void uudecode_uu_4bytes(char *out, char *in, int len)
static void uudecode_uu_line(int ofd, char *in)
{
- int olen = in[0] - 32;
+ int olen = (in[0] - 32) & 0x3f;
char buf[4];
in++;
@@ -105,54 +91,42 @@ static void uudecode_uu_line(int ofd, char *in)
}
}
-static void uudecode_uu(int ifd, int ofd)
-{
- char *line = NULL;
-
- for (;;) {
- if (!(line = get_line(ifd))) break;
- if (*line) {
- if (!strncmp(line, "end", 3)) {
- free(line);
- break;
- }
- uudecode_uu_line(ofd,line);
- }
- free(line);
- }
-}
-
void uudecode_main(void)
{
- int ifd = 0, ofd, idx = 0;
- char *line;
- void (*decoder)(int ifd, int ofd) = NULL;
+ int ifd = 0, ofd, idx = 0, m;
+ char *line = 0,
+ *class[] = {"begin%*[ ]%15s%*[ ]%n", "begin-base64%*[ ]%15s%*[ ]%n"};
+
if (toys.optc) ifd = xopen(*toys.optargs, O_RDONLY);
for (;;) {
char mode[16];
- if (!(line = get_line(ifd))) error_exit("no header");
- sscanf(line, "begin%*[ ]%15s%*[ ]%n", mode, &idx);
- if (idx) decoder = uudecode_uu;
- else {
- sscanf(line, "begin-base64%*[ ]%15s%*[ ]%n", mode, &idx);
- if (idx) decoder = uudecode_b64;
+ free(line);
+ if (!(line = get_line(ifd))) error_exit("bad EOF");
+ for (m=0; m < 2; m++) {
+ sscanf(line, class[m], mode, &idx);
+ if (idx) break;
}
- if (!idx) {
- free(line);
- continue;
- }
+ if (!idx) continue;
ofd = xcreate(TT.o ? TT.o : line+idx, O_WRONLY|O_CREAT|O_TRUNC,
string_to_mode(mode, 0777^toys.old_umask));
free(line);
- decoder(ifd,ofd);
break;
}
+ while ((line = get_line(ifd)) != NULL) {
+ if (strcmp(line, m ? "====" : "end")) {
+ if (m) uudecode_b64_line(ofd, line, strlen(line));
+ else uudecode_uu_line(ofd, line);
+ } else m = 2;
+ free(line);
+ if (m == 2) break;
+ }
+
if (CFG_TOYBOX_FREE) {
if (ifd) close(ifd);
close(ofd);