![Liming Wang](/assets/img/avatar_default.png)
strndup is a GNU extension. So dont include string.h without defining _GNU_SOURCE (it results in a compile error otherwise). Remove these includes as util.h does it already. Signed-off-by: Liming Wang <liming.wang@windriver.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: peterz@infradead.org Cc: mhiramat@redhat.com LKML-Reference: <1259734306-26323-1-git-send-email-liming.wang@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
229 lines
3.6 KiB
C
229 lines
3.6 KiB
C
#include "string.h"
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#include "util.h"
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static int hex(char ch)
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{
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if ((ch >= '0') && (ch <= '9'))
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return ch - '0';
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if ((ch >= 'a') && (ch <= 'f'))
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return ch - 'a' + 10;
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if ((ch >= 'A') && (ch <= 'F'))
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return ch - 'A' + 10;
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return -1;
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}
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/*
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* While we find nice hex chars, build a long_val.
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* Return number of chars processed.
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*/
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int hex2u64(const char *ptr, u64 *long_val)
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{
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const char *p = ptr;
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*long_val = 0;
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while (*p) {
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const int hex_val = hex(*p);
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if (hex_val < 0)
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break;
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*long_val = (*long_val << 4) | hex_val;
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p++;
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}
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return p - ptr;
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}
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char *strxfrchar(char *s, char from, char to)
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{
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char *p = s;
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while ((p = strchr(p, from)) != NULL)
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*p++ = to;
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return s;
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}
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#define K 1024LL
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/*
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* perf_atoll()
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* Parse (\d+)(b|B|kb|KB|mb|MB|gb|GB|tb|TB) (e.g. "256MB")
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* and return its numeric value
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*/
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s64 perf_atoll(const char *str)
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{
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unsigned int i;
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s64 length = -1, unit = 1;
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if (!isdigit(str[0]))
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goto out_err;
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for (i = 1; i < strlen(str); i++) {
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switch (str[i]) {
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case 'B':
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case 'b':
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break;
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case 'K':
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if (str[i + 1] != 'B')
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goto out_err;
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else
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goto kilo;
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case 'k':
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if (str[i + 1] != 'b')
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goto out_err;
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kilo:
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unit = K;
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break;
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case 'M':
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if (str[i + 1] != 'B')
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goto out_err;
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else
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goto mega;
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case 'm':
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if (str[i + 1] != 'b')
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goto out_err;
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mega:
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unit = K * K;
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break;
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case 'G':
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if (str[i + 1] != 'B')
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goto out_err;
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else
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goto giga;
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case 'g':
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if (str[i + 1] != 'b')
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goto out_err;
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giga:
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unit = K * K * K;
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break;
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case 'T':
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if (str[i + 1] != 'B')
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goto out_err;
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else
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goto tera;
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case 't':
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if (str[i + 1] != 'b')
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goto out_err;
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tera:
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unit = K * K * K * K;
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break;
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case '\0': /* only specified figures */
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unit = 1;
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break;
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default:
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if (!isdigit(str[i]))
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goto out_err;
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break;
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}
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}
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length = atoll(str) * unit;
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goto out;
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out_err:
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length = -1;
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out:
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return length;
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}
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/*
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* Helper function for splitting a string into an argv-like array.
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* originaly copied from lib/argv_split.c
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*/
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static const char *skip_sep(const char *cp)
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{
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while (*cp && isspace(*cp))
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cp++;
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return cp;
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}
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static const char *skip_arg(const char *cp)
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{
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while (*cp && !isspace(*cp))
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cp++;
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return cp;
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}
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static int count_argc(const char *str)
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{
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int count = 0;
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while (*str) {
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str = skip_sep(str);
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if (*str) {
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count++;
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str = skip_arg(str);
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}
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}
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return count;
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}
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/**
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* argv_free - free an argv
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* @argv - the argument vector to be freed
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*
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* Frees an argv and the strings it points to.
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*/
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void argv_free(char **argv)
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{
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char **p;
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for (p = argv; *p; p++)
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free(*p);
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free(argv);
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}
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/**
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* argv_split - split a string at whitespace, returning an argv
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* @str: the string to be split
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* @argcp: returned argument count
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*
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* Returns an array of pointers to strings which are split out from
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* @str. This is performed by strictly splitting on white-space; no
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* quote processing is performed. Multiple whitespace characters are
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* considered to be a single argument separator. The returned array
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* is always NULL-terminated. Returns NULL on memory allocation
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* failure.
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*/
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char **argv_split(const char *str, int *argcp)
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{
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int argc = count_argc(str);
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char **argv = zalloc(sizeof(*argv) * (argc+1));
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char **argvp;
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if (argv == NULL)
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goto out;
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if (argcp)
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*argcp = argc;
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argvp = argv;
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while (*str) {
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str = skip_sep(str);
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if (*str) {
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const char *p = str;
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char *t;
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str = skip_arg(str);
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t = strndup(p, str-p);
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if (t == NULL)
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goto fail;
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*argvp++ = t;
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}
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}
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*argvp = NULL;
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out:
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return argv;
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fail:
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argv_free(argv);
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return NULL;
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}
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