diff options
Diffstat (limited to 'src/lzmadec/lzmadec.c')
| -rw-r--r-- | src/lzmadec/lzmadec.c | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/src/lzmadec/lzmadec.c b/src/lzmadec/lzmadec.c index eab00544..0b2adb97 100644 --- a/src/lzmadec/lzmadec.c +++ b/src/lzmadec/lzmadec.c @@ -19,12 +19,7 @@ #include "sysdefs.h" -#ifdef HAVE_ERRNO_H -# include <errno.h> -#else -extern int errno; -#endif - +#include <errno.h> #include <stdio.h> #include <unistd.h> @@ -65,7 +60,7 @@ static uint8_t out_buf[BUFSIZ]; static lzma_stream strm = LZMA_STREAM_INIT; /// Number of bytes to use memory at maximum -static size_t memlimit; +static uint64_t memlimit; /// Program name to be shown in error messages static const char *argv0; @@ -94,8 +89,8 @@ help(void) " -d, --decompress (ignored)\n" " -k, --keep (ignored)\n" " -f, --force allow reading compressed data from a terminal\n" -" -M, --memory=NUM use NUM bytes of memory at maximum; the suffixes\n" -" k, M, G, Ki, Mi, and Gi are supported.\n" +" -M, --memory=NUM use NUM bytes of memory at maximum (0 means default);\n" +" the suffixes k, M, G, Ki, Mi, and Gi are supported.\n" " --format=FMT accept only files in the given file format;\n" " possible FMTs are `auto', `native', and alone',\n" " -h, --help display this help and exit\n" @@ -141,20 +136,14 @@ version(void) static void set_default_memlimit(void) { - uint64_t mem = physmem(); - if (mem != 0) { - mem /= 3; + const uint64_t mem = physmem(); -#if UINT64_MAX > SIZE_MAX - if (mem > SIZE_MAX) - mem = SIZE_MAX; -#endif - - memlimit = mem / 3; - } else { + if (mem == 0) // Cannot autodetect, use 10 MiB as the default limit. memlimit = (1U << 23) + (1U << 21); - } + else + // Limit is 33 % of RAM. + memlimit = mem / 3; return; } @@ -165,7 +154,7 @@ set_default_memlimit(void) /// This is rudely copied from src/lzma/util.c and modified a little. :-( /// static size_t -str_to_size(const char *value) +str_to_uint64(const char *value) { size_t result = 0; @@ -263,7 +252,10 @@ parse_options(int argc, char **argv) break; case 'M': - memlimit = str_to_size(optarg); + memlimit = str_to_uint64(optarg); + if (memlimit == 0) + set_default_memlimit(); + break; case 'h': |