forked from radareorg/radare2
/
str.c
3080 lines (2901 loc) · 62.8 KB
/
str.c
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/* radare - LGPL - Copyright 2007-2018 - pancake */
#include "r_types.h"
#include "r_util.h"
#include "r_cons.h"
#include "r_bin.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
/* stable code */
static const char *nullstr = "";
static const char *nullstr_c = "(null)";
static const char *rwxstr[] = {
[0] = "---",
[1] = "--x",
[2] = "-w-",
[3] = "-wx",
[4] = "r--",
[5] = "r-x",
[6] = "rw-",
[7] = "rwx",
[8] = "---",
[9] = "--x",
[10] = "-w-",
[11] = "-wx",
[12] = "r--",
[13] = "r-x",
[14] = "rw-",
[15] = "rwx",
};
R_API int r_str_casecmp(const char *s1, const char *s2) {
#ifdef _MSC_VER
return stricmp (s1, s2);
#else
return strcasecmp (s1, s2);
#endif
}
R_API int r_str_ncasecmp(const char *s1, const char *s2, size_t n) {
#ifdef _MSC_VER
return _strnicmp (s1, s2, n);
#else
return strncasecmp (s1, s2, n);
#endif
}
// GOOD
// In-place replace the first instance of the character a, with the character b.
R_API int r_str_replace_ch(char *s, char a, char b, bool global) {
int ret = 0;
char *o = s;
if (!s || a == b) {
return 0;
}
for (; *o; s++, o++) {
if (*o == a) {
ret++;
if (b) {
*s = b;
} else {
/* remove char */
s--;
}
if (!global) {
return 1;
}
} else {
*s = *o;
}
}
*s = 0;
return ret;
}
// DEPRECATED
R_API int r_str_replace_char_once(char *s, int a, int b) {
int ret = 0;
char *o = s;
if (a == b) {
return 0;
}
for (; *o; s++, o++) {
if (*o == a) {
if (b) {
*s = b;
return ++ret;
}
o++;
}
*s = *o;
}
*s = 0;
return ret;
}
// DEPRECATED
R_API int r_str_replace_char(char *s, int a, int b) {
int ret = 0;
char *o = s;
if (!s || a == b) {
return 0;
}
for (; *o; s++, o++) {
if (*o == a) {
ret++;
if (b) {
*s = b;
} else {
/* remove char */
s--;
}
} else {
*s = *o;
}
}
*s = 0;
return ret;
}
R_API void r_str_reverse(char *str) {
int i, len = strlen (str);
int half = len / 2;
for (i = 0; i < half; i++) {
char ch = str[i];
str[i] = str[len - i - 1];
str[len - i - 1] = ch;
}
}
// TODO: do not use toupper.. must support modes to also append lowercase chars like in r1
// TODO: this functions needs some stabilization
R_API int r_str_bits(char *strout, const ut8 *buf, int len, const char *bitz) {
int i, j, idx;
if (bitz) {
for (i = j = 0; i<len && (!bitz||bitz[i]); i++) {
if (i > 0 && (i % 8) == 0) {
buf++;
}
if (*buf & (1 << (i % 8))) {
strout[j++] = toupper ((const ut8)bitz[i]);
}
}
} else {
for (i = j = 0; i < len; i++) {
idx = (i / 8);
int bit = 7 - (i % 8);
strout[j++] = (buf[idx] & (1 << bit))? '1' : '0';
}
}
strout[j] = 0;
return j;
}
// In-place trims a bitstring to groups of 8 bits.
// For example, the bitstring 1000000000000000 will not be modified, but the
// bitstring 0000000001000000 will be changed to 01000000.
static void trimbits(char *b) {
int len = strlen (b);
char *one = strchr (b, '1');
int pos = one ? (int)(size_t)(one - b) : len - 1;
pos = (pos / 8) * 8;
memmove (b, b + pos, len - pos + 1);
}
// Set 'strout' to the binary representation of the input value.
// strout must be a char array of 65 or greater.
// The string is then trimmed using the "trimbits" function above.
R_API int r_str_bits64(char* strout, ut64 in) {
int i, bit, count = 0;
count = 0;
for (i = (sizeof (in) * 8) - 1; i >= 0; i--) {
bit = in >> i;
if (bit & 1) {
strout[count] = '1';
} else {
strout[count] = '0';
}
++count;
}
strout[count] = '\0';
/* trim by 8 bits */
trimbits (strout);
return count;
}
/**
* function: r_str_bits_from_num
*
*/
R_API ut64 r_str_bits_from_string(const char *buf, const char *bitz) {
ut64 out = 0LL;
/* return the numberic value associated to a string (rflags) */
for (; *buf; buf++) {
char *ch = strchr (bitz, toupper ((const unsigned char)*buf));
if (!ch) ch = strchr (bitz, tolower ((const unsigned char)*buf));
if (ch) {
int bit = (int)(size_t)(ch - bitz);
out |= (ut64)(1LL << bit);
} else {
return UT64_MAX;
}
}
return out;
}
R_API int r_str_binstr2bin(const char *str, ut8 *out, int outlen) {
int n, i, j, k, ret, len;
len = strlen (str);
for (n = i = 0; i < len; i += 8) {
ret = 0;
while (str[i]==' ') {
str++;
}
if (i + 7 < len) {
for (k = 0, j = i + 7; j >= i; j--, k++) {
// INVERSE for (k=0,j=i; j<i+8; j++,k++) {
if (str[j] == ' ') {
//k--;
continue;
}
// printf ("---> j=%d (%c) (%02x)\n", j, str[j], str[j]);
if (str[j] == '1') {
ret|=1 << k;
} else if (str[j] != '0') {
return n;
}
}
}
// printf ("-======> %02x\n", ret);
out[n++] = ret;
if (n == outlen) {
return n;
}
}
return n;
}
// Returns the permissions as in integer given an input in the form of rwx, rx,
// etc.
R_API int r_str_rwx(const char *str) {
int ret = atoi (str);
if (!ret) {
ret |= strchr (str, 'm') ? 16 : 0;
ret |= strchr (str, 'r') ? 4 : 0;
ret |= strchr (str, 'w') ? 2 : 0;
ret |= strchr (str, 'x') ? 1 : 0;
} else if (ret < 0 || ret >= R_ARRAY_SIZE (rwxstr)) {
ret = 0;
}
return ret;
}
// Returns the string representation of the permission of the inputted integer.
R_API const char *r_str_rwx_i(int rwx) {
if (rwx < 0 || rwx >= R_ARRAY_SIZE (rwxstr)) {
rwx = 0;
}
return rwxstr[rwx % 24]; // 15 for srwx
}
// Returns "true" or "false" as a string given an input integer. The returned
// value is consistant with C's definition of 0 is false, and all other values
// are true.
R_API const char *r_str_bool(int b) {
return b? "true": "false";
}
// If up is true, upcase all characters in the string, otherwise downcase all
// characters in the string.
R_API void r_str_case(char *str, bool up) {
if (up) {
char oc = 0;
for (; *str; oc = *str++) {
*str = (*str=='x' && oc=='0') ? 'x': toupper ((int)(ut8)*str);
}
} else {
for (; *str; str++) {
*str = tolower ((int)(ut8)*str);
}
}
}
R_API char *r_str_home(const char *str) {
char *dst, *home = r_sys_getenv (R_SYS_HOME);
size_t length;
if (!home) {
home = r_file_tmpdir ();
if (!home) {
return NULL;
}
}
length = strlen (home) + 1;
if (str) {
length += strlen (R_SYS_DIR) + strlen (str);
}
dst = (char *)malloc (length);
if (!dst) {
goto fail;
}
strcpy (dst, home);
if (str) {
strcat (dst, R_SYS_DIR);
strcat (dst, str);
}
fail:
free (home);
return dst;
}
R_API char *r_str_r2_prefix(const char *str) {
return r_str_newf ("%s%s%s", r_sys_prefix (NULL), R_SYS_DIR, str);
}
// Compute a 64 bit DJB hash of a string.
R_API ut64 r_str_hash64(const char *s) {
ut64 len, h = 5381;
if (!s) {
return 0;
}
for (len = strlen (s); len > 0; len--) {
h = (h ^ (h << 5)) ^ *s++;
}
return h;
}
// Compute a 32bit DJB hash of a string.
R_API ut32 r_str_hash(const char *s) {
return (ut32) r_str_hash64 (s);
}
R_API int r_str_delta(char *p, char a, char b) {
char *_a = strchr (p, a);
char *_b = strchr (p, b);
return (!_a || !_b)? 0 : (_a - _b);
}
// In-place split string using ch as a delimeter. Replaces all instances of ch
// with a null byte. Returns the number of split strings. For example
// r_str_split("hello world", ' ') will replace the space with '\0' and
// return 2.
R_API int r_str_split(char *str, char ch) {
int i;
char *p;
if (!str || !*str) {
return 0;
}
/* TODO: sync with r1 code */
for (i = 1, p = str; *p; p++) {
if (*p == ch) {
i++;
*p = '\0';
} // s/ /\0/g
}
return i;
}
// Convert a string into an array of string separated by \0
// And the last by \0\0
// Separates by words and skip spaces.
// Returns the number of tokens that the string is tokenized into.
R_API int r_str_word_set0(char *str) {
int i, quote = 0;
char *p;
if (!str || !*str) {
return 0;
}
for (i = 0; str[i] && str[i + 1]; i++) {
if (i > 0 && str[i-1] == ' ' && str[i] == ' ') {
int len = strlen (str + i);
memmove (str + i, str + i + 1, len);
i--;
}
}
if (str[i] == ' ') {
str[i] = 0;
}
for (i = 1, p = str; *p; p++) {
if (*p == '\"') {
if (quote) {
quote = 0;
*p = '\0';
// FIX: i++;
continue;
} else {
quote = 1;
memmove (p, p + 1, strlen (p + 1) + 1);
}
}
if (quote) {
continue;
}
if (*p == ' ') {
char *q = p - 1;
if (p > str && (*q == '\\' || !*q)) {
memmove (p, p + 1, strlen (p + 1) + 1);
if (*q == '\\') {
*q = ' ';
continue;
}
p--;
}
i++;
*p = '\0';
} // s/ /\0/g
}
return i;
}
R_API int r_str_word_set0_stack(char *str) {
int i;
char *p, *q;
RStack *s;
void *pop;
if (!str || !*str) {
return 0;
}
for (i = 0; str[i] && str[i+1]; i++) {
if (i > 0 && str[i - 1] == ' ' && str[i] == ' ') {
memmove (str + i, str + i + 1, strlen (str + i));
i--;
}
if (i == 0 && str[i] == ' ') {
memmove (str + i, str + i + 1, strlen (str + i));
}
}
if (str[i] == ' ') {
str[i] = 0;
}
s = r_stack_new (5); //Some random number
for (i = 1, p = str; *p; p++) {
q = p - 1;
if (p > str && (*q == '\\')) {
memmove (q, p, strlen (p) + 1);
p--;
continue;
}
switch (*p) {
case '(':
case '{':
case '[':
r_stack_push (s, (void *)p);
continue;
case '\'':
case '"':
pop = r_stack_pop (s);
if (pop && *(char *)pop != *p) {
r_stack_push (s, pop);
r_stack_push (s, (void *)p);
} else if (!pop) {
r_stack_push (s, (void *)p);
}
continue;
case ')':
case '}':
case ']':
pop = r_stack_pop (s);
if (pop) {
if ((*(char *)pop == '(' && *p == ')') ||
(*(char *)pop == '{' && *p == '}') ||
(*(char *)pop == '[' && *p == ']')) {
continue;
}
}
break;
case ' ':
if (p > str && !*q) {
memmove (p, p+1, strlen (p + 1) + 1);
if (*q == '\\') {
*q = ' ';
continue;
}
p--;
}
if (r_stack_is_empty (s)) {
i++;
*p = '\0';
}
default:
break;
}
}
r_stack_free (s);
return i;
}
R_API char *r_str_word_get0set(char *stra, int stralen, int idx, const char *newstr, int *newlen) {
char *p = NULL;
char *out;
int alen, blen, nlen;
if (!stra && !newstr) {
return NULL;
}
if (stra) {
p = (char *)r_str_word_get0 (stra, idx);
}
if (!p) {
int nslen = strlen (newstr);
out = malloc (nslen + 1);
if (!out) {
return NULL;
}
strcpy (out, newstr);
out[nslen] = 0;
if (newlen) {
*newlen = nslen;
}
return out;
}
alen = (size_t)(p - stra);
blen = stralen - ((alen + strlen (p)) + 1);
if (blen < 0) {
blen = 0;
}
nlen = alen + blen + strlen (newstr);
out = malloc (nlen + 2);
if (!out) {
return NULL;
}
if (alen > 0) {
memcpy (out, stra, alen);
}
memcpy (out + alen, newstr, strlen (newstr) + 1);
if (blen > 0) {
memcpy (out + alen + strlen (newstr) + 1, p + strlen (p) + 1, blen + 1);
}
out[nlen + 1] = 0;
if (newlen) {
*newlen = nlen + ((blen == 0)? 1 : 0);
}
return out;
}
// Get the idx'th entry of a tokenized string.
// XXX: Warning! this function is UNSAFE, check that the string has, at least,
// idx+1 tokens.
R_API const char *r_str_word_get0(const char *str, int idx) {
int i;
const char *ptr = str;
if (!ptr || idx < 0 /* prevent crashes with negative index */) {
return (char *)nullstr;
}
for (i = 0; i != idx; i++) {
ptr += strlen (ptr) + 1;
}
return ptr;
}
// Return the number of times that the character ch appears in the string.
R_API int r_str_char_count(const char *string, char ch) {
int i, count = 0;
for (i = 0; string[i]; i++) {
if (string[i] == ch) {
count++;
}
}
return count;
}
// Counts the number of words (separted by separator charactors: newlines, tabs,
// return, space). See r_util.h for more details of the IS_SEPARATOR macro.
R_API int r_str_word_count(const char *string) {
const char *text, *tmp;
int word;
for (text = tmp = string; *text && IS_SEPARATOR (*text); text++);
for (word = 0; *text; word++) {
for (;*text && !IS_SEPARATOR (*text); text++);
for (tmp = text; *text && IS_SEPARATOR (*text); text++);
}
return word;
}
// Returns a pointer to the first instance of a character that isn't chr in a
// string.
// TODO: make this const-correct.
// XXX if the string is only made up of chr, then the pointer will just point to
// a null byte!
R_API char *r_str_ichr(char *str, char chr) {
while (*str == chr) {
str++;
}
return str;
}
// Returns a pointer to the last instance of the character chr in the input
// string.
R_API const char *r_str_lchr(const char *str, char chr) {
if (str) {
int len = strlen (str);
for (; len >= 0; len--) {
if (str[len] == chr) {
return str + len;
}
}
}
return NULL;
}
/* find the last char chr in the substring str[start:end] with end not included */
R_API const char *r_sub_str_lchr(const char *str, int start, int end, char chr) {
do {
end--;
} while (str[end] != chr && end >= start);
return str[end] == chr ? &str[end] : NULL;
}
/* find the first char chr in the substring str[start:end] with end not included */
R_API const char *r_sub_str_rchr(const char *str, int start, int end, char chr) {
while (str[start] != chr && start < end) start++;
return str[start] == chr ? &str[start] : NULL;
}
R_API const char *r_str_rstr(const char *base, const char *p) {
char *s = strdup (base);
char *k = strdup (p);
r_str_reverse (s);
r_str_reverse (k);
char *q = strstr (s, k);
const char *r = NULL;
if (q) {
r = base + strlen (base) - (q - s) - strlen (p);
}
free (s);
free (k);
return r;
}
R_API const char *r_str_rchr(const char *base, const char *p, int ch) {
if (!base) {
return NULL;
}
if (!p) {
p = base + strlen (base);
}
for (; p >= base; p--) {
if (ch == *p) {
break;
}
}
return (p < base) ? NULL : p;
}
R_API const char *r_str_nstr(const char *from, const char *to, int size) {
int i;
for (i = 0; i < size; i++) {
if (!from || !to || from[i] != to[i]) {
break;
}
}
return from + i;
}
// Returns a new heap-allocated copy of str.
R_API char *r_str_new(const char *str) {
if (!str) {
return NULL;
}
return strdup (str);
}
// Returns a new heap-allocated copy of str, sets str[len] to '\0'.
// If the input str is longer than len, it will be truncated.
R_API char *r_str_newlen(const char *str, int len) {
char *buf;
if (len < 1) {
return NULL;
}
buf = malloc (len + 1);
if (!buf) {
return NULL;
}
memcpy (buf, str, len);
buf[len] = 0;
return buf;
}
R_API char *r_str_trunc_ellipsis(const char *str, int len) {
char *buf;
if (strlen (str) < len) {
buf = strdup (str);
} else {
buf = r_str_newlen (str, len);
strcpy (buf + len - 4, "...");
}
return buf;
}
// Returns a new heap-allocated string that matches the format-string
// specification.
R_API char *r_str_newf(const char *fmt, ...) {
int ret, ret2;
char *tmp, *p, string[1024];
va_list ap, ap2;
va_start (ap, fmt);
va_start (ap2, fmt);
if (!strchr (fmt, '%')) {
va_end (ap2);
va_end (ap);
return strdup (fmt);
}
ret = vsnprintf (string, sizeof (string) - 1, fmt, ap);
if (ret < 1 || ret >= sizeof (string)) {
p = calloc (1, ret + 3);
if (!p) {
va_end (ap2);
va_end (ap);
return NULL;
}
ret2 = vsnprintf (p, ret + 1, fmt, ap2);
if (ret2 < 1 || ret2 > ret + 1) {
free (p);
va_end (ap2);
va_end (ap);
return NULL;
}
tmp = r_str_new (p);
free (p);
} else {
tmp = r_str_new (string);
}
va_end (ap2);
va_end (ap);
return tmp;
}
// Secure string copy with null terminator (like strlcpy or strscpy but ours
R_API void r_str_ncpy(char *dst, const char *src, int n) {
int i;
n--;
for (i = 0; src[i] && n > 0; i++, n--) {
dst[i] = src[i];
}
dst[i] = 0;
}
/* memccmp("foo.bar", "foo.cow, '.') == 0 */
// Returns 1 if src and dst are equal up until the first instance of ch in src.
R_API int r_str_ccmp(const char *dst, const char *src, int ch) {
int i;
for (i = 0; src[i] && src[i] != ch; i++) {
if (dst[i] != src[i]) {
return 1;
}
}
return 0;
}
// Compare two strings for the first len bytes. Returns true if they are equal.
// NOTE: this is not useful as a comparitor, as it returns true or false.
R_API int r_str_cmp(const char *a, const char *b, int len) {
if (!a || !b) {
return false;
}
if (a == b) {
return true;
}
if (len < 0) {
return strcmp (a, b);
}
for (;len--;) {
if (*a == '\0' || *b == '\0' || *a != *b) {
return false;
}
a++; b++;
}
return true;
}
// Copies all characters from src to dst up until the character 'ch'.
R_API int r_str_ccpy(char *dst, char *src, int ch) {
int i;
for (i = 0; src[i] && src[i] != ch; i++) {
dst[i] = src[i];
}
dst[i] = '\0';
return i;
}
R_API char *r_str_word_get_first(const char *text) {
char *ret;
int len = 0;
for (;*text && IS_SEPARATOR (*text); text++);
/* strdup */
len = strlen (text);
ret = (char *)malloc (len + 1);
if (!ret) {
eprintf ("Cannot allocate %d byte(s).\n", len+1);
return NULL;
}
strncpy (ret, text, len);
ret[len] = '\0';
return ret;
}
R_API const char *r_str_get(const char *str) {
return str? str: nullstr_c;
}
R_API const char *r_str_get2(const char *str) {
return str? str: nullstr;
}
R_API char *r_str_ndup(const char *ptr, int len) {
if (len < 0) {
return NULL;
}
char *out = malloc (len + 1);
if (!out) {
return NULL;
}
strncpy (out, ptr, len);
out[len] = 0;
return out;
}
// TODO: deprecate?
R_API char *r_str_dup(char *ptr, const char *string) {
int len;
free (ptr);
if (!string) {
return NULL;
}
len = strlen (string)+1;
ptr = malloc (len+1);
if (!ptr) {
return NULL;
}
memcpy (ptr, string, len);
return ptr;
}
R_API void r_str_writef(int fd, const char *fmt, ...) {
char *buf;
va_list ap;
va_start (ap, fmt);
if ((buf = malloc (4096)) != NULL) {
vsnprintf (buf, 4096, fmt, ap);
r_str_write (fd, buf);
free (buf);
}
va_end (ap);
}
// TODO: rename to prepend
R_API char *r_str_prefix(char *ptr, const char *string) {
int slen, plen;
if (!ptr) {
return strdup (string);
}
//plen = r_str_len_utf8 (ptr);
//slen = r_str_len_utf8 (string);
plen = strlen (ptr);
slen = strlen (string);
ptr = realloc (ptr, slen + plen + 1);
if (!ptr) {
return NULL;
}
memmove (ptr + slen, ptr, plen + 1);
memmove (ptr, string, slen);
return ptr;
}
R_API char *r_str_appendlen(char *ptr, const char *string, int slen) {
char *msg = r_str_newlen (string, slen);
char *ret = r_str_append (ptr, msg);
free (msg);
return ret;
}
/*
* first argument must be allocated
* return: the pointer ptr resized to string size.
*/
R_API char *r_str_append(char *ptr, const char *string) {
int slen, plen;
if (string && !ptr) {
return strdup (string);
}
if (!string) {
return ptr;
}
plen = strlen (ptr);
slen = strlen (string);
char *newptr = realloc (ptr, slen + plen + 1);
if (!newptr) {
free (ptr);
return NULL;
}
ptr = newptr;
memcpy (ptr + plen, string, slen + 1);
return ptr;
}
R_API char *r_str_appendf(char *ptr, const char *fmt, ...) {
int ret;
char string[4096];
va_list ap;
va_start (ap, fmt);
ret = vsnprintf (string, sizeof (string), fmt, ap);
if (ret >= sizeof (string)) {
char *p = malloc (ret + 2);
if (!p) {
va_end (ap);
return NULL;
}
vsnprintf (p, ret + 1, fmt, ap);
ptr = r_str_append (ptr, p);
free (p);
} else {
ptr = r_str_append (ptr, string);
}
va_end (ap);
return ptr;
}
R_API char *r_str_appendch(char *x, char y) {
char b[2] = { y, 0 };
return r_str_append (x,b);
}
// XXX: wtf must deprecate
R_API void *r_str_free(void *ptr) {
free (ptr);
return NULL;
}
R_API char* r_str_replace(char *str, const char *key, const char *val, int g) {
int off, i, klen, vlen, slen;
char *newstr, *scnd, *p = str;
if (!str || !key || !val) {
return NULL;
}
klen = strlen (key);
vlen = strlen (val);
if (klen == 1 && vlen < 2) {
r_str_replace_char (str, *key, *val);
return str;
}
if (klen == vlen && !strcmp (key, val)) {
return str;
}
slen = strlen (str);
for (i = 0; i < slen; ) {
p = (char *)r_mem_mem (
(const ut8*)str + i, slen - i,
(const ut8*)key, klen);
if (!p) {
break;
}
off = (int)(size_t)(p - str);
scnd = strdup (p + klen);
slen += vlen - klen;
// HACK: this 32 avoids overwrites wtf
newstr = realloc (str, slen + klen + 1);
if (!newstr) {
eprintf ("realloc fail\n");
free (str);
free (scnd);
str = NULL;
break;
}
str = newstr;
p = str + off;
memcpy (p, val, vlen);
memcpy (p + vlen, scnd, strlen (scnd) + 1);
i = off + vlen;
free (scnd);
if (!g) {
break;
}
}
return str;
}
/* replace the key in str with val.
*
* str - input string
* clean - input string cleaned of ANSI chars
* thunk - array of integers that map each char of the clean string into the
* position in the str string
* clen - number of elements in thunk
* key - string to find in the clean string
* val - string that replaces key in the str string
* g - if true, replace all occurences of key
*
* It returns a pointer to the modified string */
R_API char* r_str_replace_thunked(char *str, char *clean, int *thunk, int clen,
const char *key, const char *val, int g) {
int i, klen, vlen, slen, delta = 0, bias;
char *newstr, *scnd, *p = clean, *str_p;
if (!str || !key || !val || !clean || !thunk) {
return NULL;
}