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(to_chars): Generate GNU base-64 representation if we are generating

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an old or new GNU format tar file for a number that can't be represented
with the POSIX format.
This commit is contained in:
Paul Eggert
1999-08-20 08:41:32 +00:00
parent 6dccec3ba4
commit 2c3d0a2dcd
1 changed files with 17 additions and 4 deletions
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src/create.c
+17 -4
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@@ -114,25 +114,38 @@ to_chars (int negative, uintmax_t value, size_t valsize,
{ {
uintmax_t v = negative ? -value : value; uintmax_t v = negative ? -value : value;
/* Generate the POSIX octal representation if the number fits. */
if (! negative && v <= MAX_VAL_WITH_DIGITS (size - 1, LG_8)) if (! negative && v <= MAX_VAL_WITH_DIGITS (size - 1, LG_8))
{ {
where[size - 1] = '\0'; where[size - 1] = '\0';
to_base (v, LG_8, base_8_digits, where, size - 1); to_base (v, LG_8, base_8_digits, where, size - 1);
} }
/* Otherwise, generate the GNU base-64 representation if we are
generating an old or new GNU format and if the number fits. */
else if (v <= MAX_VAL_WITH_DIGITS (size - 1, LG_64) else if (v <= MAX_VAL_WITH_DIGITS (size - 1, LG_64)
&& archive_format == GNU_FORMAT) && (archive_format == GNU_FORMAT
|| archive_format == OLDGNU_FORMAT))
{ {
where[0] = negative ? '-' : '+'; where[0] = negative ? '-' : '+';
to_base (v, LG_64, base_64_digits, where + 1, size - 1); to_base (v, LG_64, base_64_digits, where + 1, size - 1);
} }
else if (negative
&& archive_format != GNU_FORMAT /* Otherwise, if the number is negative, and if it would not cause
&& valsize * CHAR_BIT <= (size - 1) * LG_8) ambiguity on this host by confusing positive with negative
values, then generate the POSIX octal representation of the value
modulo 2**(field bits). The resulting tar file is
machine-dependent, since it depends on the host word size. Yuck!
But this is the traditional behavior. */
else if (negative && valsize * CHAR_BIT <= (size - 1) * LG_8)
{ {
where[size - 1] = '\0'; where[size - 1] = '\0';
to_base (value & MAX_VAL_WITH_DIGITS (valsize * CHAR_BIT, 1), to_base (value & MAX_VAL_WITH_DIGITS (valsize * CHAR_BIT, 1),
LG_8, base_8_digits, where, size - 1); LG_8, base_8_digits, where, size - 1);
} }
/* Otherwise, output a substitute value if possible (with a
warning), and an error message if not. */
else else
{ {
uintmax_t maxval = (archive_format == GNU_FORMAT uintmax_t maxval = (archive_format == GNU_FORMAT