diff options
| -rw-r--r-- | toys/pending/uuencode.c | 103 |
1 files changed, 50 insertions, 53 deletions
diff --git a/toys/pending/uuencode.c b/toys/pending/uuencode.c index 277cefac..fcd9be78 100644 --- a/toys/pending/uuencode.c +++ b/toys/pending/uuencode.c @@ -12,37 +12,29 @@ config UUENCODE help usage: uuencode [-m] [file] encode-filename - Uuencode or (with -m option) base64-encode stdin or [file], - with encode-filename in the output, which is sent to stdout. + Uuencode stdin (or file) to stdout, with encode-filename in the output. + + -m base64-encode */ #define FOR_uuencode #include "toys.h" - - -static void uuencode_b64_3bytes(char *out, const char *in, int bytes) +// Convert 3 bytes of input to 4 bytes of output +static void uuencode_b64_3bytes(const char *in, int bytes) { - static const char *table = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" - "abcdefghijklmnopqrstuvwxyz" - "0123456789+/"; - unsigned int i,x=0; - for (i = 0; i < bytes; i++) { - x |= (in[i] & 0x0ff) << (8*(2-i)); - } - out[0] = table[(x>>(3*6)) & 0x3f]; - out[1] = table[(x>>(2*6)) & 0x3f]; - out[2] = table[(x>>(1*6)) & 0x3f]; - out[3] = table[(x>>(0*6)) & 0x3f]; - if (bytes <= 1) out[2] = '='; - if (bytes <= 2) out[3] = '='; + unsigned int i, x; + + for (i = x = 0; i<4; i++) { + if (i < bytes) x |= (in[i] & 0x0ff) << (8*(2-i)); + xputc(i > bytes ? '=' : toybuf[(x>>((3-i)*6)) & 0x3f]); + } } -static void uuencode_b64_line(char *out, const char *in, int len) +static void uuencode_b64_line(const char *in, int len) { while (len > 0) { - uuencode_b64_3bytes(out,in,len < 3 ? len : 3); - xprintf("%c%c%c%c",out[0],out[1],out[2],out[3]); + uuencode_b64_3bytes(in, len < 3 ? len : 3); in += 3; len -= 3; }; @@ -52,39 +44,33 @@ static void uuencode_b64_line(char *out, const char *in, int len) static void uuencode_b64(int fd, const char *name) { int len; - char *inbuf = toybuf; - char *outbuf = toybuf+64; + char buf[(76/4)*3]; + xprintf("begin-base64 744 %s\n",name); do { - len = xread(fd,inbuf,48); - if (len > 0) uuencode_b64_line(outbuf,inbuf,len); + len = xread(fd, buf, sizeof(buf)); + + uuencode_b64_line(buf, len); } while (len > 0); xprintf("====\n"); } -static void uuencode_uu_3bytes(char *out, const char *in) +static void uuencode_uu_3bytes(const char *in) { - unsigned int i,x=0; - for (i = 0; i <= 2; i++) { - x |= (in[i] & 0x0ff) << (8*(2-i)); - } - for (i = 0; i <= 3; i++) { - out[i] = 32 + ((x >> (6*(3-i))) & 0x3f); - } + unsigned int i, x = 0; + + for (i = 0; i <= 2; i++) x |= (in[i] & 0x0ff) << (8*(2-i)); + for (i = 0; i <= 3; i++) xputc(32 + ((x >> (6*(3-i))) & 0x3f)); } -static void uuencode_uu_line(char *out, const char *in, int len) +static void uuencode_uu_line(char *in, int len) { - int i; - if (len == 0) { - xprintf("`\n"); - return; - } - xprintf("%c",len+32); - for (i = 0; i < len; i += 3) { - uuencode_uu_3bytes(out,in+i); - xprintf("%c%c%c%c",out[0],out[1],out[2],out[3]); + if (len > 0) { + int i; + + xputc(len+32); + for (i = 0; i < len; i += 3) uuencode_uu_3bytes(in+i); } xprintf("\n"); } @@ -92,25 +78,36 @@ static void uuencode_uu_line(char *out, const char *in, int len) static void uuencode_uu(int fd, const char *name) { int len; - char *inbuf = toybuf; - char *outbuf = toybuf+64; + char buf[45]; + xprintf("begin 744 %s\n",name); do { - len = xread(fd,inbuf,45); - uuencode_uu_line(outbuf,inbuf,len); + len = xread(fd, buf, 45); + uuencode_uu_line(buf, len); } while (len > 0); xprintf("end\n"); } void uuencode_main(void) { - char *encode_filename = toys.optargs[0]; - int fd = 0; /* STDIN */ + char *p, *name = toys.optargs[0]; + int i, fd = 0; + + // base64 table + + p = toybuf; + for (i = 'A'; i != ':'; i++) { + if (i == 'Z'+1) i = 'a'; + if (i == 'z'+1) i = '0'; + *(p++) = i; + } + *(p++) = '+'; + *(p++) = '/'; if (toys.optc == 2) { - fd = xopen(toys.optargs[0],O_RDONLY); // dies if error - encode_filename = toys.optargs[1]; + fd = xopen(toys.optargs[0], O_RDONLY); // dies if error + name = toys.optargs[1]; } - if (toys.optflags & FLAG_m) uuencode_b64(fd,encode_filename); - else uuencode_uu(fd,encode_filename); + if (toys.optflags & FLAG_m) uuencode_b64(fd, name); + else uuencode_uu(fd, name); } |