zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/tools/perf/util/string.c b/ap/os/linux/linux-3.4.x/tools/perf/util/string.c
new file mode 100644
index 0000000..d583638
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/tools/perf/util/string.c
@@ -0,0 +1,315 @@
+#include "util.h"
+#include "string.h"
+
+#define K 1024LL
+/*
+ * perf_atoll()
+ * Parse (\d+)(b|B|kb|KB|mb|MB|gb|GB|tb|TB) (e.g. "256MB")
+ * and return its numeric value
+ */
+s64 perf_atoll(const char *str)
+{
+ unsigned int i;
+ s64 length = -1, unit = 1;
+
+ if (!isdigit(str[0]))
+ goto out_err;
+
+ for (i = 1; i < strlen(str); i++) {
+ switch (str[i]) {
+ case 'B':
+ case 'b':
+ break;
+ case 'K':
+ if (str[i + 1] != 'B')
+ goto out_err;
+ else
+ goto kilo;
+ case 'k':
+ if (str[i + 1] != 'b')
+ goto out_err;
+kilo:
+ unit = K;
+ break;
+ case 'M':
+ if (str[i + 1] != 'B')
+ goto out_err;
+ else
+ goto mega;
+ case 'm':
+ if (str[i + 1] != 'b')
+ goto out_err;
+mega:
+ unit = K * K;
+ break;
+ case 'G':
+ if (str[i + 1] != 'B')
+ goto out_err;
+ else
+ goto giga;
+ case 'g':
+ if (str[i + 1] != 'b')
+ goto out_err;
+giga:
+ unit = K * K * K;
+ break;
+ case 'T':
+ if (str[i + 1] != 'B')
+ goto out_err;
+ else
+ goto tera;
+ case 't':
+ if (str[i + 1] != 'b')
+ goto out_err;
+tera:
+ unit = K * K * K * K;
+ break;
+ case '\0': /* only specified figures */
+ unit = 1;
+ break;
+ default:
+ if (!isdigit(str[i]))
+ goto out_err;
+ break;
+ }
+ }
+
+ length = atoll(str) * unit;
+ goto out;
+
+out_err:
+ length = -1;
+out:
+ return length;
+}
+
+/*
+ * Helper function for splitting a string into an argv-like array.
+ * originally copied from lib/argv_split.c
+ */
+static const char *skip_sep(const char *cp)
+{
+ while (*cp && isspace(*cp))
+ cp++;
+
+ return cp;
+}
+
+static const char *skip_arg(const char *cp)
+{
+ while (*cp && !isspace(*cp))
+ cp++;
+
+ return cp;
+}
+
+static int count_argc(const char *str)
+{
+ int count = 0;
+
+ while (*str) {
+ str = skip_sep(str);
+ if (*str) {
+ count++;
+ str = skip_arg(str);
+ }
+ }
+
+ return count;
+}
+
+/**
+ * argv_free - free an argv
+ * @argv - the argument vector to be freed
+ *
+ * Frees an argv and the strings it points to.
+ */
+void argv_free(char **argv)
+{
+ char **p;
+ for (p = argv; *p; p++)
+ free(*p);
+
+ free(argv);
+}
+
+/**
+ * argv_split - split a string at whitespace, returning an argv
+ * @str: the string to be split
+ * @argcp: returned argument count
+ *
+ * Returns an array of pointers to strings which are split out from
+ * @str. This is performed by strictly splitting on white-space; no
+ * quote processing is performed. Multiple whitespace characters are
+ * considered to be a single argument separator. The returned array
+ * is always NULL-terminated. Returns NULL on memory allocation
+ * failure.
+ */
+char **argv_split(const char *str, int *argcp)
+{
+ int argc = count_argc(str);
+ char **argv = zalloc(sizeof(*argv) * (argc+1));
+ char **argvp;
+
+ if (argv == NULL)
+ goto out;
+
+ if (argcp)
+ *argcp = argc;
+
+ argvp = argv;
+
+ while (*str) {
+ str = skip_sep(str);
+
+ if (*str) {
+ const char *p = str;
+ char *t;
+
+ str = skip_arg(str);
+
+ t = strndup(p, str-p);
+ if (t == NULL)
+ goto fail;
+ *argvp++ = t;
+ }
+ }
+ *argvp = NULL;
+
+out:
+ return argv;
+
+fail:
+ argv_free(argv);
+ return NULL;
+}
+
+/* Character class matching */
+static bool __match_charclass(const char *pat, char c, const char **npat)
+{
+ bool complement = false, ret = true;
+
+ if (*pat == '!') {
+ complement = true;
+ pat++;
+ }
+ if (*pat++ == c) /* First character is special */
+ goto end;
+
+ while (*pat && *pat != ']') { /* Matching */
+ if (*pat == '-' && *(pat + 1) != ']') { /* Range */
+ if (*(pat - 1) <= c && c <= *(pat + 1))
+ goto end;
+ if (*(pat - 1) > *(pat + 1))
+ goto error;
+ pat += 2;
+ } else if (*pat++ == c)
+ goto end;
+ }
+ if (!*pat)
+ goto error;
+ ret = false;
+
+end:
+ while (*pat && *pat != ']') /* Searching closing */
+ pat++;
+ if (!*pat)
+ goto error;
+ *npat = pat + 1;
+ return complement ? !ret : ret;
+
+error:
+ return false;
+}
+
+/* Glob/lazy pattern matching */
+static bool __match_glob(const char *str, const char *pat, bool ignore_space)
+{
+ while (*str && *pat && *pat != '*') {
+ if (ignore_space) {
+ /* Ignore spaces for lazy matching */
+ if (isspace(*str)) {
+ str++;
+ continue;
+ }
+ if (isspace(*pat)) {
+ pat++;
+ continue;
+ }
+ }
+ if (*pat == '?') { /* Matches any single character */
+ str++;
+ pat++;
+ continue;
+ } else if (*pat == '[') /* Character classes/Ranges */
+ if (__match_charclass(pat + 1, *str, &pat)) {
+ str++;
+ continue;
+ } else
+ return false;
+ else if (*pat == '\\') /* Escaped char match as normal char */
+ pat++;
+ if (*str++ != *pat++)
+ return false;
+ }
+ /* Check wild card */
+ if (*pat == '*') {
+ while (*pat == '*')
+ pat++;
+ if (!*pat) /* Tail wild card matches all */
+ return true;
+ while (*str)
+ if (__match_glob(str++, pat, ignore_space))
+ return true;
+ }
+ return !*str && !*pat;
+}
+
+/**
+ * strglobmatch - glob expression pattern matching
+ * @str: the target string to match
+ * @pat: the pattern string to match
+ *
+ * This returns true if the @str matches @pat. @pat can includes wildcards
+ * ('*','?') and character classes ([CHARS], complementation and ranges are
+ * also supported). Also, this supports escape character ('\') to use special
+ * characters as normal character.
+ *
+ * Note: if @pat syntax is broken, this always returns false.
+ */
+bool strglobmatch(const char *str, const char *pat)
+{
+ return __match_glob(str, pat, false);
+}
+
+/**
+ * strlazymatch - matching pattern strings lazily with glob pattern
+ * @str: the target string to match
+ * @pat: the pattern string to match
+ *
+ * This is similar to strglobmatch, except this ignores spaces in
+ * the target string.
+ */
+bool strlazymatch(const char *str, const char *pat)
+{
+ return __match_glob(str, pat, true);
+}
+
+/**
+ * strtailcmp - Compare the tail of two strings
+ * @s1: 1st string to be compared
+ * @s2: 2nd string to be compared
+ *
+ * Return 0 if whole of either string is same as another's tail part.
+ */
+int strtailcmp(const char *s1, const char *s2)
+{
+ int i1 = strlen(s1);
+ int i2 = strlen(s2);
+ while (--i1 >= 0 && --i2 >= 0) {
+ if (s1[i1] != s2[i2])
+ return s1[i1] - s2[i2];
+ }
+ return 0;
+}
+