diff options
Diffstat (limited to 'Build/source/extra/xz-4.999.9beta/src/xz/util.c')
-rw-r--r-- | Build/source/extra/xz-4.999.9beta/src/xz/util.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/Build/source/extra/xz-4.999.9beta/src/xz/util.c b/Build/source/extra/xz-4.999.9beta/src/xz/util.c new file mode 100644 index 00000000000..d160ea0d600 --- /dev/null +++ b/Build/source/extra/xz-4.999.9beta/src/xz/util.c @@ -0,0 +1,229 @@ +/////////////////////////////////////////////////////////////////////////////// +// +/// \file util.c +/// \brief Miscellaneous utility functions +// +// Author: Lasse Collin +// +// This file has been put into the public domain. +// You can do whatever you want with this file. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "private.h" + + +// Thousand separator for format strings is not supported outside POSIX. +// This is used in uint64_to_str() and double_to_str(). +#ifdef DOSLIKE +# define THOUSAND "" +#else +# define THOUSAND "'" +#endif + + +extern void * +xrealloc(void *ptr, size_t size) +{ + assert(size > 0); + + ptr = realloc(ptr, size); + if (ptr == NULL) + message_fatal("%s", strerror(errno)); + + return ptr; +} + + +extern char * +xstrdup(const char *src) +{ + assert(src != NULL); + const size_t size = strlen(src) + 1; + char *dest = xmalloc(size); + return memcpy(dest, src, size); +} + + +extern uint64_t +str_to_uint64(const char *name, const char *value, uint64_t min, uint64_t max) +{ + uint64_t result = 0; + + // Skip blanks. + while (*value == ' ' || *value == '\t') + ++value; + + // Accept special value "max". Supporting "min" doesn't seem useful. + if (strcmp(value, "max") == 0) + return max; + + if (*value < '0' || *value > '9') + message_fatal(_("%s: Value is not a non-negative " + "decimal integer"), value); + + do { + // Don't overflow. + if (result > (UINT64_MAX - 9) / 10) + goto error; + + result *= 10; + result += *value - '0'; + ++value; + } while (*value >= '0' && *value <= '9'); + + if (*value != '\0') { + // Look for suffix. + static const struct { + const char name[4]; + uint64_t multiplier; + } suffixes[] = { + { "k", UINT64_C(1000) }, + { "kB", UINT64_C(1000) }, + { "M", UINT64_C(1000000) }, + { "MB", UINT64_C(1000000) }, + { "G", UINT64_C(1000000000) }, + { "GB", UINT64_C(1000000000) }, + { "Ki", UINT64_C(1024) }, + { "KiB", UINT64_C(1024) }, + { "Mi", UINT64_C(1048576) }, + { "MiB", UINT64_C(1048576) }, + { "Gi", UINT64_C(1073741824) }, + { "GiB", UINT64_C(1073741824) } + }; + + uint64_t multiplier = 0; + for (size_t i = 0; i < ARRAY_SIZE(suffixes); ++i) { + if (strcmp(value, suffixes[i].name) == 0) { + multiplier = suffixes[i].multiplier; + break; + } + } + + if (multiplier == 0) { + message(V_ERROR, _("%s: Invalid multiplier suffix. " + "Valid suffixes:"), value); + message_fatal("`k' (10^3), `M' (10^6), `G' (10^9) " + "`Ki' (2^10), `Mi' (2^20), " + "`Gi' (2^30)"); + } + + // Don't overflow here either. + if (result > UINT64_MAX / multiplier) + goto error; + + result *= multiplier; + } + + if (result < min || result > max) + goto error; + + return result; + +error: + message_fatal(_("Value of the option `%s' must be in the range " + "[%" PRIu64 ", %" PRIu64 "]"), + name, min, max); +} + + +extern const char * +uint64_to_str(uint64_t value, uint32_t slot) +{ + // 2^64 with thousand separators is 26 bytes plus trailing '\0'. + static char bufs[4][32]; + + assert(slot < ARRAY_SIZE(bufs)); + + snprintf(bufs[slot], sizeof(bufs[slot]), "%" THOUSAND PRIu64, value); + return bufs[slot]; +} + + +extern const char * +double_to_str(double value) +{ + // 64 bytes is surely enough, since it won't fit in some other + // fields anyway. + static char buf[64]; + + snprintf(buf, sizeof(buf), "%" THOUSAND ".1f", value); + return buf; +} + + +/* +/// \brief Simple quoting to get rid of ASCII control characters +/// +/// This is not so cool and locale-dependent, but should be good enough +/// At least we don't print any control characters on the terminal. +/// +extern char * +str_quote(const char *str) +{ + size_t dest_len = 0; + bool has_ctrl = false; + + while (str[dest_len] != '\0') + if (*(unsigned char *)(str + dest_len++) < 0x20) + has_ctrl = true; + + char *dest = malloc(dest_len + 1); + if (dest != NULL) { + if (has_ctrl) { + for (size_t i = 0; i < dest_len; ++i) + if (*(unsigned char *)(str + i) < 0x20) + dest[i] = '?'; + else + dest[i] = str[i]; + + dest[dest_len] = '\0'; + + } else { + // Usually there are no control characters, + // so we can optimize. + memcpy(dest, str, dest_len + 1); + } + } + + return dest; +} +*/ + + +extern bool +is_empty_filename(const char *filename) +{ + if (filename[0] == '\0') { + message_error(_("Empty filename, skipping")); + return true; + } + + return false; +} + + +extern bool +is_tty_stdin(void) +{ + const bool ret = isatty(STDIN_FILENO); + + if (ret) + message_error(_("Compressed data not read from a terminal " + "unless `--force' is used.")); + + return ret; +} + + +extern bool +is_tty_stdout(void) +{ + const bool ret = isatty(STDOUT_FILENO); + + if (ret) + message_error(_("Compressed data not written to a terminal " + "unless `--force' is used.")); + + return ret; +} |