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-rw-r--r--lib/strutils.c1029
1 files changed, 1029 insertions, 0 deletions
diff --git a/lib/strutils.c b/lib/strutils.c
new file mode 100644
index 0000000..b71dde5
--- /dev/null
+++ b/lib/strutils.c
@@ -0,0 +1,1029 @@
+/*
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
+ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <ctype.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <assert.h>
+
+#include "c.h"
+#include "nls.h"
+#include "strutils.h"
+#include "bitops.h"
+
+static int STRTOXX_EXIT_CODE = EXIT_FAILURE;
+
+void strutils_set_exitcode(int ex) {
+ STRTOXX_EXIT_CODE = ex;
+}
+
+static int do_scale_by_power (uintmax_t *x, int base, int power)
+{
+ while (power--) {
+ if (UINTMAX_MAX / base < *x)
+ return -ERANGE;
+ *x *= base;
+ }
+ return 0;
+}
+
+/*
+ * strtosize() - convert string to size (uintmax_t).
+ *
+ * Supported suffixes:
+ *
+ * XiB or X for 2^N
+ * where X = {K,M,G,T,P,E,Z,Y}
+ * or X = {k,m,g,t,p,e} (undocumented for backward compatibility only)
+ * for example:
+ * 10KiB = 10240
+ * 10K = 10240
+ *
+ * XB for 10^N
+ * where X = {K,M,G,T,P,E,Z,Y}
+ * for example:
+ * 10KB = 10000
+ *
+ * The optional 'power' variable returns number associated with used suffix
+ * {K,M,G,T,P,E,Z,Y} = {1,2,3,4,5,6,7,8}.
+ *
+ * The function also supports decimal point, for example:
+ * 0.5MB = 500000
+ * 0.5MiB = 512000
+ *
+ * Note that the function does not accept numbers with '-' (negative sign)
+ * prefix.
+ */
+int parse_size(const char *str, uintmax_t *res, int *power)
+{
+ const char *p;
+ char *end;
+ uintmax_t x, frac = 0;
+ int base = 1024, rc = 0, pwr = 0, frac_zeros = 0;
+
+ static const char *suf = "KMGTPEZY";
+ static const char *suf2 = "kmgtpezy";
+ const char *sp;
+
+ *res = 0;
+
+ if (!str || !*str) {
+ rc = -EINVAL;
+ goto err;
+ }
+
+ /* Only positive numbers are acceptable
+ *
+ * Note that this check is not perfect, it would be better to
+ * use lconv->negative_sign. But coreutils use the same solution,
+ * so it's probably good enough...
+ */
+ p = str;
+ while (isspace((unsigned char) *p))
+ p++;
+ if (*p == '-') {
+ rc = -EINVAL;
+ goto err;
+ }
+
+ errno = 0, end = NULL;
+ x = strtoumax(str, &end, 0);
+
+ if (end == str ||
+ (errno != 0 && (x == UINTMAX_MAX || x == 0))) {
+ rc = errno ? -errno : -EINVAL;
+ goto err;
+ }
+ if (!end || !*end)
+ goto done; /* without suffix */
+ p = end;
+
+ /*
+ * Check size suffixes
+ */
+check_suffix:
+ if (*(p + 1) == 'i' && (*(p + 2) == 'B' || *(p + 2) == 'b') && !*(p + 3))
+ base = 1024; /* XiB, 2^N */
+ else if ((*(p + 1) == 'B' || *(p + 1) == 'b') && !*(p + 2))
+ base = 1000; /* XB, 10^N */
+ else if (*(p + 1)) {
+ struct lconv const *l = localeconv();
+ const char *dp = l ? l->decimal_point : NULL;
+ size_t dpsz = dp ? strlen(dp) : 0;
+
+ if (frac == 0 && *p && dp && strncmp(dp, p, dpsz) == 0) {
+ const char *fstr = p + dpsz;
+
+ for (p = fstr; *p == '0'; p++)
+ frac_zeros++;
+ errno = 0, end = NULL;
+ frac = strtoumax(fstr, &end, 0);
+ if (end == fstr ||
+ (errno != 0 && (frac == UINTMAX_MAX || frac == 0))) {
+ rc = errno ? -errno : -EINVAL;
+ goto err;
+ }
+ if (frac && (!end || !*end)) {
+ rc = -EINVAL;
+ goto err; /* without suffix, but with frac */
+ }
+ p = end;
+ goto check_suffix;
+ }
+ rc = -EINVAL;
+ goto err; /* unexpected suffix */
+ }
+
+ sp = strchr(suf, *p);
+ if (sp)
+ pwr = (sp - suf) + 1;
+ else {
+ sp = strchr(suf2, *p);
+ if (sp)
+ pwr = (sp - suf2) + 1;
+ else {
+ rc = -EINVAL;
+ goto err;
+ }
+ }
+
+ rc = do_scale_by_power(&x, base, pwr);
+ if (power)
+ *power = pwr;
+ if (frac && pwr) {
+ int zeros_in_pwr = frac_zeros % 3;
+ int frac_pwr = pwr - (frac_zeros / 3) - 1;
+ uintmax_t y = frac * (zeros_in_pwr == 0 ? 100 :
+ zeros_in_pwr == 1 ? 10 : 1);
+
+ if (frac_pwr < 0) {
+ rc = -EINVAL;
+ goto err;
+ }
+ do_scale_by_power(&y, base, frac_pwr);
+ x += y;
+ }
+done:
+ *res = x;
+err:
+ if (rc < 0)
+ errno = -rc;
+ return rc;
+}
+
+int strtosize(const char *str, uintmax_t *res)
+{
+ return parse_size(str, res, NULL);
+}
+
+int isdigit_strend(const char *str, const char **end)
+{
+ const char *p;
+
+ for (p = str; p && *p && isdigit((unsigned char) *p); p++);
+
+ if (end)
+ *end = p;
+ return p && p > str && !*p;
+}
+
+int isxdigit_strend(const char *str, const char **end)
+{
+ const char *p;
+
+ for (p = str; p && *p && isxdigit((unsigned char) *p); p++);
+
+ if (end)
+ *end = p;
+
+ return p && p > str && !*p;
+}
+
+/*
+ * parse_switch(argv[i], "on", "off", "yes", "no", NULL);
+ */
+int parse_switch(const char *arg, const char *errmesg, ...)
+{
+ const char *a, *b;
+ va_list ap;
+
+ va_start(ap, errmesg);
+ do {
+ a = va_arg(ap, char *);
+ if (!a)
+ break;
+ b = va_arg(ap, char *);
+ if (!b)
+ break;
+
+ if (strcmp(arg, a) == 0) {
+ va_end(ap);
+ return 1;
+ } else if (strcmp(arg, b) == 0) {
+ va_end(ap);
+ return 0;
+ }
+ } while (1);
+ va_end(ap);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, arg);
+}
+
+#ifndef HAVE_MEMPCPY
+void *mempcpy(void *restrict dest, const void *restrict src, size_t n)
+{
+ return ((char *)memcpy(dest, src, n)) + n;
+}
+#endif
+
+#ifndef HAVE_STRNLEN
+size_t strnlen(const char *s, size_t maxlen)
+{
+ size_t i;
+
+ for (i = 0; i < maxlen; i++) {
+ if (s[i] == '\0')
+ return i;
+ }
+ return maxlen;
+}
+#endif
+
+#ifndef HAVE_STRNCHR
+char *strnchr(const char *s, size_t maxlen, int c)
+{
+ for (; maxlen-- && *s != '\0'; ++s)
+ if (*s == (char)c)
+ return (char *)s;
+ return NULL;
+}
+#endif
+
+#ifndef HAVE_STRNDUP
+char *strndup(const char *s, size_t n)
+{
+ size_t len = strnlen(s, n);
+ char *new = malloc((len + 1) * sizeof(char));
+ if (!new)
+ return NULL;
+ new[len] = '\0';
+ return (char *) memcpy(new, s, len);
+}
+#endif
+
+static uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base);
+static uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base);
+
+int16_t strtos16_or_err(const char *str, const char *errmesg)
+{
+ int32_t num = strtos32_or_err(str, errmesg);
+
+ if (num < INT16_MIN || num > INT16_MAX) {
+ errno = ERANGE;
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+ }
+ return num;
+}
+
+static uint16_t _strtou16_or_err(const char *str, const char *errmesg, int base)
+{
+ uint32_t num = _strtou32_or_err(str, errmesg, base);
+
+ if (num > UINT16_MAX) {
+ errno = ERANGE;
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+ }
+ return num;
+}
+
+uint16_t strtou16_or_err(const char *str, const char *errmesg)
+{
+ return _strtou16_or_err(str, errmesg, 10);
+}
+
+uint16_t strtox16_or_err(const char *str, const char *errmesg)
+{
+ return _strtou16_or_err(str, errmesg, 16);
+}
+
+int32_t strtos32_or_err(const char *str, const char *errmesg)
+{
+ int64_t num = strtos64_or_err(str, errmesg);
+
+ if (num < INT32_MIN || num > INT32_MAX) {
+ errno = ERANGE;
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+ }
+ return num;
+}
+
+static uint32_t _strtou32_or_err(const char *str, const char *errmesg, int base)
+{
+ uint64_t num = _strtou64_or_err(str, errmesg, base);
+
+ if (num > UINT32_MAX) {
+ errno = ERANGE;
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+ }
+ return num;
+}
+
+uint32_t strtou32_or_err(const char *str, const char *errmesg)
+{
+ return _strtou32_or_err(str, errmesg, 10);
+}
+
+uint32_t strtox32_or_err(const char *str, const char *errmesg)
+{
+ return _strtou32_or_err(str, errmesg, 16);
+}
+
+int64_t strtos64_or_err(const char *str, const char *errmesg)
+{
+ int64_t num;
+ char *end = NULL;
+
+ errno = 0;
+ if (str == NULL || *str == '\0')
+ goto err;
+ num = strtoimax(str, &end, 10);
+
+ if (errno || str == end || (end && *end))
+ goto err;
+
+ return num;
+err:
+ if (errno == ERANGE)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+static uint64_t _strtou64_or_err(const char *str, const char *errmesg, int base)
+{
+ uintmax_t num;
+ char *end = NULL;
+
+ errno = 0;
+ if (str == NULL || *str == '\0')
+ goto err;
+ num = strtoumax(str, &end, base);
+
+ if (errno || str == end || (end && *end))
+ goto err;
+
+ return num;
+err:
+ if (errno == ERANGE)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+uint64_t strtou64_or_err(const char *str, const char *errmesg)
+{
+ return _strtou64_or_err(str, errmesg, 10);
+}
+
+uint64_t strtox64_or_err(const char *str, const char *errmesg)
+{
+ return _strtou64_or_err(str, errmesg, 16);
+}
+
+double strtod_or_err(const char *str, const char *errmesg)
+{
+ double num;
+ char *end = NULL;
+
+ errno = 0;
+ if (str == NULL || *str == '\0')
+ goto err;
+ num = strtod(str, &end);
+
+ if (errno || str == end || (end && *end))
+ goto err;
+
+ return num;
+err:
+ if (errno == ERANGE)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+long strtol_or_err(const char *str, const char *errmesg)
+{
+ long num;
+ char *end = NULL;
+
+ errno = 0;
+ if (str == NULL || *str == '\0')
+ goto err;
+ num = strtol(str, &end, 10);
+
+ if (errno || str == end || (end && *end))
+ goto err;
+
+ return num;
+err:
+ if (errno == ERANGE)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+unsigned long strtoul_or_err(const char *str, const char *errmesg)
+{
+ unsigned long num;
+ char *end = NULL;
+
+ errno = 0;
+ if (str == NULL || *str == '\0')
+ goto err;
+ num = strtoul(str, &end, 10);
+
+ if (errno || str == end || (end && *end))
+ goto err;
+
+ return num;
+err:
+ if (errno == ERANGE)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+uintmax_t strtosize_or_err(const char *str, const char *errmesg)
+{
+ uintmax_t num;
+
+ if (strtosize(str, &num) == 0)
+ return num;
+
+ if (errno)
+ err(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+
+ errx(STRTOXX_EXIT_CODE, "%s: '%s'", errmesg, str);
+}
+
+
+void strtotimeval_or_err(const char *str, struct timeval *tv, const char *errmesg)
+{
+ double user_input;
+
+ user_input = strtod_or_err(str, errmesg);
+ tv->tv_sec = (time_t) user_input;
+ tv->tv_usec = (long)((user_input - tv->tv_sec) * 1000000);
+}
+
+/*
+ * Converts stat->st_mode to ls(1)-like mode string. The size of "str" must
+ * be 11 bytes.
+ */
+char *xstrmode(mode_t mode, char *str)
+{
+ unsigned short i = 0;
+
+ if (S_ISDIR(mode))
+ str[i++] = 'd';
+ else if (S_ISLNK(mode))
+ str[i++] = 'l';
+ else if (S_ISCHR(mode))
+ str[i++] = 'c';
+ else if (S_ISBLK(mode))
+ str[i++] = 'b';
+ else if (S_ISSOCK(mode))
+ str[i++] = 's';
+ else if (S_ISFIFO(mode))
+ str[i++] = 'p';
+ else if (S_ISREG(mode))
+ str[i++] = '-';
+
+ str[i++] = mode & S_IRUSR ? 'r' : '-';
+ str[i++] = mode & S_IWUSR ? 'w' : '-';
+ str[i++] = (mode & S_ISUID
+ ? (mode & S_IXUSR ? 's' : 'S')
+ : (mode & S_IXUSR ? 'x' : '-'));
+ str[i++] = mode & S_IRGRP ? 'r' : '-';
+ str[i++] = mode & S_IWGRP ? 'w' : '-';
+ str[i++] = (mode & S_ISGID
+ ? (mode & S_IXGRP ? 's' : 'S')
+ : (mode & S_IXGRP ? 'x' : '-'));
+ str[i++] = mode & S_IROTH ? 'r' : '-';
+ str[i++] = mode & S_IWOTH ? 'w' : '-';
+ str[i++] = (mode & S_ISVTX
+ ? (mode & S_IXOTH ? 't' : 'T')
+ : (mode & S_IXOTH ? 'x' : '-'));
+ str[i] = '\0';
+
+ return str;
+}
+
+/*
+ * returns exponent (2^x=n) in range KiB..EiB (2^10..2^60)
+ */
+static int get_exp(uint64_t n)
+{
+ int shft;
+
+ for (shft = 10; shft <= 60; shft += 10) {
+ if (n < (1ULL << shft))
+ break;
+ }
+ return shft - 10;
+}
+
+char *size_to_human_string(int options, uint64_t bytes)
+{
+ char buf[32];
+ int dec, exp;
+ uint64_t frac;
+ const char *letters = "BKMGTPE";
+ char suffix[sizeof(" KiB")], *psuf = suffix;
+ char c;
+
+ if (options & SIZE_SUFFIX_SPACE)
+ *psuf++ = ' ';
+
+ exp = get_exp(bytes);
+ c = *(letters + (exp ? exp / 10 : 0));
+ dec = exp ? bytes / (1ULL << exp) : bytes;
+ frac = exp ? bytes % (1ULL << exp) : 0;
+
+ *psuf++ = c;
+
+ if ((options & SIZE_SUFFIX_3LETTER) && (c != 'B')) {
+ *psuf++ = 'i';
+ *psuf++ = 'B';
+ }
+
+ *psuf = '\0';
+
+ /* fprintf(stderr, "exp: %d, unit: %c, dec: %d, frac: %jd\n",
+ * exp, suffix[0], dec, frac);
+ */
+
+ if (frac) {
+ /* round */
+ frac = (frac / (1ULL << (exp - 10)) + 50) / 100;
+ if (frac == 10)
+ dec++, frac = 0;
+ }
+
+ if (frac) {
+ struct lconv const *l = localeconv();
+ char *dp = l ? l->decimal_point : NULL;
+
+ if (!dp || !*dp)
+ dp = ".";
+ snprintf(buf, sizeof(buf), "%d%s%" PRIu64 "%s", dec, dp, frac, suffix);
+ } else
+ snprintf(buf, sizeof(buf), "%d%s", dec, suffix);
+
+ return strdup(buf);
+}
+
+/*
+ * Parses comma delimited list to array with IDs, for example:
+ *
+ * "aaa,bbb,ccc" --> ary[0] = FOO_AAA;
+ * ary[1] = FOO_BBB;
+ * ary[3] = FOO_CCC;
+ *
+ * The function name2id() provides conversion from string to ID.
+ *
+ * Returns: >= 0 : number of items added to ary[]
+ * -1 : parse error or unknown item
+ * -2 : arysz reached
+ */
+int string_to_idarray(const char *list, int ary[], size_t arysz,
+ int (name2id)(const char *, size_t))
+{
+ const char *begin = NULL, *p;
+ size_t n = 0;
+
+ if (!list || !*list || !ary || !arysz || !name2id)
+ return -1;
+
+ for (p = list; p && *p; p++) {
+ const char *end = NULL;
+ int id;
+
+ if (n >= arysz)
+ return -2;
+ if (!begin)
+ begin = p; /* begin of the column name */
+ if (*p == ',')
+ end = p; /* terminate the name */
+ if (*(p + 1) == '\0')
+ end = p + 1; /* end of string */
+ if (!begin || !end)
+ continue;
+ if (end <= begin)
+ return -1;
+
+ id = name2id(begin, end - begin);
+ if (id == -1)
+ return -1;
+ ary[ n++ ] = id;
+ begin = NULL;
+ if (end && !*end)
+ break;
+ }
+ return n;
+}
+
+/*
+ * Parses the array like string_to_idarray but if format is "+aaa,bbb"
+ * it adds fields to array instead of replacing them.
+ */
+int string_add_to_idarray(const char *list, int ary[], size_t arysz,
+ size_t *ary_pos, int (name2id)(const char *, size_t))
+{
+ const char *list_add;
+ int r;
+
+ if (!list || !*list || !ary_pos || *ary_pos > arysz)
+ return -1;
+
+ if (list[0] == '+')
+ list_add = &list[1];
+ else {
+ list_add = list;
+ *ary_pos = 0;
+ }
+
+ r = string_to_idarray(list_add, &ary[*ary_pos], arysz - *ary_pos, name2id);
+ if (r > 0)
+ *ary_pos += r;
+ return r;
+}
+
+/*
+ * LIST ::= <item> [, <item>]
+ *
+ * The <item> is translated to 'id' by name2id() function and the 'id' is used
+ * as a position in the 'ary' bit array. It means that the 'id' has to be in
+ * range <0..N> where N < sizeof(ary) * NBBY.
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int string_to_bitarray(const char *list,
+ char *ary,
+ int (*name2bit)(const char *, size_t))
+{
+ const char *begin = NULL, *p;
+
+ if (!list || !name2bit || !ary)
+ return -EINVAL;
+
+ for (p = list; p && *p; p++) {
+ const char *end = NULL;
+ int bit;
+
+ if (!begin)
+ begin = p; /* begin of the level name */
+ if (*p == ',')
+ end = p; /* terminate the name */
+ if (*(p + 1) == '\0')
+ end = p + 1; /* end of string */
+ if (!begin || !end)
+ continue;
+ if (end <= begin)
+ return -1;
+
+ bit = name2bit(begin, end - begin);
+ if (bit < 0)
+ return bit;
+ setbit(ary, bit);
+ begin = NULL;
+ if (end && !*end)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * LIST ::= <item> [, <item>]
+ *
+ * The <item> is translated to 'id' by name2flag() function and the flags is
+ * set to the 'mask'
+*
+ * Returns: 0 on success, <0 on error.
+ */
+int string_to_bitmask(const char *list,
+ unsigned long *mask,
+ long (*name2flag)(const char *, size_t))
+{
+ const char *begin = NULL, *p;
+
+ if (!list || !name2flag || !mask)
+ return -EINVAL;
+
+ for (p = list; p && *p; p++) {
+ const char *end = NULL;
+ long flag;
+
+ if (!begin)
+ begin = p; /* begin of the level name */
+ if (*p == ',')
+ end = p; /* terminate the name */
+ if (*(p + 1) == '\0')
+ end = p + 1; /* end of string */
+ if (!begin || !end)
+ continue;
+ if (end <= begin)
+ return -1;
+
+ flag = name2flag(begin, end - begin);
+ if (flag < 0)
+ return flag; /* error */
+ *mask |= flag;
+ begin = NULL;
+ if (end && !*end)
+ break;
+ }
+ return 0;
+}
+
+/*
+ * Parse the lower and higher values in a string containing
+ * "lower:higher" or "lower-higher" format. Note that either
+ * the lower or the higher values may be missing, and the def
+ * value will be assigned to it by default.
+ *
+ * Returns: 0 on success, <0 on error.
+ */
+int parse_range(const char *str, int *lower, int *upper, int def)
+{
+ char *end = NULL;
+
+ if (!str)
+ return 0;
+
+ *upper = *lower = def;
+ errno = 0;
+
+ if (*str == ':') { /* <:N> */
+ str++;
+ *upper = strtol(str, &end, 10);
+ if (errno || !end || *end || end == str)
+ return -1;
+ } else {
+ *upper = *lower = strtol(str, &end, 10);
+ if (errno || !end || end == str)
+ return -1;
+
+ if (*end == ':' && !*(end + 1)) /* <M:> */
+ *upper = def;
+ else if (*end == '-' || *end == ':') { /* <M:N> <M-N> */
+ str = end + 1;
+ end = NULL;
+ errno = 0;
+ *upper = strtol(str, &end, 10);
+
+ if (errno || !end || *end || end == str)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static const char *next_path_segment(const char *str, size_t *sz)
+{
+ const char *start, *p;
+
+ start = str;
+ *sz = 0;
+ while (start && *start == '/' && *(start + 1) == '/')
+ start++;
+
+ if (!start || !*start)
+ return NULL;
+
+ for (*sz = 1, p = start + 1; *p && *p != '/'; p++) {
+ (*sz)++;
+ }
+
+ return start;
+}
+
+int streq_paths(const char *a, const char *b)
+{
+ while (a && b) {
+ size_t a_sz, b_sz;
+ const char *a_seg = next_path_segment(a, &a_sz);
+ const char *b_seg = next_path_segment(b, &b_sz);
+
+ /*
+ fprintf(stderr, "A>>>(%zu) '%s'\n", a_sz, a_seg);
+ fprintf(stderr, "B>>>(%zu) '%s'\n", b_sz, b_seg);
+ */
+
+ /* end of the path */
+ if (a_sz + b_sz == 0)
+ return 1;
+
+ /* ignore tailing slash */
+ if (a_sz + b_sz == 1 &&
+ ((a_seg && *a_seg == '/') || (b_seg && *b_seg == '/')))
+ return 1;
+
+ if (a_sz != b_sz || strncmp(a_seg, b_seg, a_sz) != 0)
+ return 0;
+
+ a = a_seg + a_sz;
+ b = b_seg + b_sz;
+ };
+
+ return 0;
+}
+
+char *strnappend(const char *s, const char *suffix, size_t b)
+{
+ size_t a;
+ char *r;
+
+ if (!s && !suffix)
+ return strdup("");
+ if (!s)
+ return strndup(suffix, b);
+ if (!suffix)
+ return strdup(s);
+
+ assert(s);
+ assert(suffix);
+
+ a = strlen(s);
+ if (b > ((size_t) -1) - a)
+ return NULL;
+
+ r = malloc(a + b + 1);
+ if (!r)
+ return NULL;
+
+ memcpy(r, s, a);
+ memcpy(r + a, suffix, b);
+ r[a+b] = 0;
+
+ return r;
+}
+
+char *strappend(const char *s, const char *suffix)
+{
+ return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
+}
+
+char *strfappend(const char *s, const char *format, ...)
+{
+ va_list ap;
+ char *val, *res;
+ int sz;
+
+ va_start(ap, format);
+ sz = vasprintf(&val, format, ap);
+ va_end(ap);
+
+ if (sz < 0)
+ return NULL;
+
+ res = strnappend(s, val, sz);
+ free(val);
+ return res;
+}
+
+static size_t strcspn_escaped(const char *s, const char *reject)
+{
+ int escaped = 0;
+ int n;
+
+ for (n=0; s[n]; n++) {
+ if (escaped)
+ escaped = 0;
+ else if (s[n] == '\\')
+ escaped = 1;
+ else if (strchr(reject, s[n]))
+ break;
+ }
+
+ /* if s ends in \, return index of previous char */
+ return n - escaped;
+}
+
+/* Split a string into words. */
+const char *split(const char **state, size_t *l, const char *separator, int quoted)
+{
+ const char *current;
+
+ current = *state;
+
+ if (!*current) {
+ assert(**state == '\0');
+ return NULL;
+ }
+
+ current += strspn(current, separator);
+ if (!*current) {
+ *state = current;
+ return NULL;
+ }
+
+ if (quoted && strchr("\'\"", *current)) {
+ char quotechars[2] = {*current, '\0'};
+
+ *l = strcspn_escaped(current + 1, quotechars);
+ if (current[*l + 1] == '\0' || current[*l + 1] != quotechars[0] ||
+ (current[*l + 2] && !strchr(separator, current[*l + 2]))) {
+ /* right quote missing or garbage at the end */
+ *state = current;
+ return NULL;
+ }
+ *state = current++ + *l + 2;
+ } else if (quoted) {
+ *l = strcspn_escaped(current, separator);
+ if (current[*l] && !strchr(separator, current[*l])) {
+ /* unfinished escape */
+ *state = current;
+ return NULL;
+ }
+ *state = current + *l;
+ } else {
+ *l = strcspn(current, separator);
+ *state = current + *l;
+ }
+
+ return current;
+}
+
+/* Rewind file pointer forward to new line. */
+int skip_fline(FILE *fp)
+{
+ int ch;
+
+ do {
+ if ((ch = fgetc(fp)) == EOF)
+ return 1;
+ if (ch == '\n')
+ return 0;
+ } while (1);
+}
+
+#ifdef TEST_PROGRAM_STRUTILS
+
+static int test_strutils_sizes(int argc, char *argv[])
+{
+ uintmax_t size = 0;
+ char *hum, *hum2;
+
+ if (argc < 2)
+ return EXIT_FAILURE;
+
+ if (strtosize(argv[1], &size))
+ errx(EXIT_FAILURE, "invalid size '%s' value", argv[1]);
+
+ hum = size_to_human_string(SIZE_SUFFIX_1LETTER, size);
+ hum2 = size_to_human_string(SIZE_SUFFIX_3LETTER |
+ SIZE_SUFFIX_SPACE, size);
+
+ printf("%25s : %20ju : %8s : %12s\n", argv[1], size, hum, hum2);
+ free(hum);
+ free(hum2);
+
+ return EXIT_SUCCESS;
+}
+
+static int test_strutils_cmp_paths(int argc, char *argv[])
+{
+ int rc = streq_paths(argv[1], argv[2]);
+
+ if (argc < 3)
+ return EXIT_FAILURE;
+
+ printf("%s: '%s' '%s'\n", rc == 1 ? "YES" : "NOT", argv[1], argv[2]);
+ return EXIT_SUCCESS;
+}
+
+int main(int argc, char *argv[])
+{
+ if (argc == 3 && strcmp(argv[1], "--size") == 0)
+ return test_strutils_sizes(argc - 1, argv + 1);
+
+ else if (argc == 4 && strcmp(argv[1], "--cmp-paths") == 0)
+ return test_strutils_cmp_paths(argc - 1, argv + 1);
+
+ else {
+ fprintf(stderr, "usage: %1$s --size <number>[suffix]\n"
+ " %1$s --cmp-paths <path> <path>\n",
+ argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ return EXIT_FAILURE;
+}
+#endif /* TEST_PROGRAM_STRUTILS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 17:20:23 +0000