lighttpd 1.4.x https://www.lighttpd.net/
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#include "buffer.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <ctype.h>
#if defined HAVE_STDINT_H
# include <stdint.h>
#elif defined HAVE_INTTYPES_H
# include <inttypes.h>
#endif
static const char hex_chars[] = "0123456789abcdef";
/**
* init the buffer
*
*/
buffer* buffer_init(void) {
buffer *b;
b = malloc(sizeof(*b));
force_assert(b);
b->ptr = NULL;
b->size = 0;
b->used = 0;
return b;
}
buffer *buffer_init_buffer(buffer *src) {
buffer *b = buffer_init();
buffer_copy_string_buffer(b, src);
return b;
}
/**
* free the buffer
*
*/
void buffer_free(buffer *b) {
if (!b) return;
free(b->ptr);
free(b);
}
void buffer_reset(buffer *b) {
if (!b) return;
/* limit don't reuse buffer larger than ... bytes */
if (b->size > BUFFER_MAX_REUSE_SIZE) {
free(b->ptr);
b->ptr = NULL;
b->size = 0;
} else if (b->size) {
b->ptr[0] = '\0';
}
b->used = 0;
}
/**
*
* allocate (if neccessary) enough space for 'size' bytes and
* set the 'used' counter to 0
*
*/
#define BUFFER_PIECE_SIZE 64
int buffer_prepare_copy(buffer *b, size_t size) {
if (!b) return -1;
if ((0 == b->size) ||
(size > b->size)) {
if (b->size) free(b->ptr);
b->size = size;
/* always allocate a multiply of BUFFER_PIECE_SIZE */
b->size += BUFFER_PIECE_SIZE - (b->size % BUFFER_PIECE_SIZE);
b->ptr = malloc(b->size);
force_assert(b->ptr);
}
b->used = 0;
return 0;
}
/**
*
* increase the internal buffer (if neccessary) to append another 'size' byte
* ->used isn't changed
*
*/
int buffer_prepare_append(buffer *b, size_t size) {
if (!b) return -1;
if (0 == b->size) {
b->size = size;
/* always allocate a multiply of BUFFER_PIECE_SIZE */
b->size += BUFFER_PIECE_SIZE - (b->size % BUFFER_PIECE_SIZE);
b->ptr = malloc(b->size);
b->used = 0;
force_assert(b->ptr);
} else if (b->used + size > b->size) {
b->size += size;
/* always allocate a multiply of BUFFER_PIECE_SIZE */
b->size += BUFFER_PIECE_SIZE - (b->size % BUFFER_PIECE_SIZE);
b->ptr = realloc(b->ptr, b->size);
force_assert(b->ptr);
}
return 0;
}
int buffer_copy_string(buffer *b, const char *s) {
size_t s_len;
if (!s || !b) return -1;
s_len = strlen(s) + 1;
buffer_prepare_copy(b, s_len);
memcpy(b->ptr, s, s_len);
b->used = s_len;
return 0;
}
int buffer_copy_string_len(buffer *b, const char *s, size_t s_len) {
if (!s || !b) return -1;
#if 0
/* removed optimization as we have to keep the empty string
* in some cases for the config handling
*
* url.access-deny = ( "" )
*/
if (s_len == 0) return 0;
#endif
buffer_prepare_copy(b, s_len + 1);
memcpy(b->ptr, s, s_len);
b->ptr[s_len] = '\0';
b->used = s_len + 1;
return 0;
}
int buffer_copy_string_buffer(buffer *b, const buffer *src) {
if (!src) return -1;
if (src->used == 0) {
buffer_reset(b);
return 0;
}
return buffer_copy_string_len(b, src->ptr, src->used - 1);
}
int buffer_append_string(buffer *b, const char *s) {
size_t s_len;
if (!s || !b) return -1;
s_len = strlen(s);
buffer_prepare_append(b, s_len + 1);
if (b->used == 0)
b->used++;
memcpy(b->ptr + b->used - 1, s, s_len + 1);
b->used += s_len;
return 0;
}
int buffer_append_string_rfill(buffer *b, const char *s, size_t maxlen) {
size_t s_len;
if (!s || !b) return -1;
s_len = strlen(s);
if (s_len > maxlen) s_len = maxlen;
buffer_prepare_append(b, maxlen + 1);
if (b->used == 0)
b->used++;
memcpy(b->ptr + b->used - 1, s, s_len);
if (maxlen > s_len) {
memset(b->ptr + b->used - 1 + s_len, ' ', maxlen - s_len);
}
b->used += maxlen;
b->ptr[b->used - 1] = '\0';
return 0;
}
/**
* append a string to the end of the buffer
*
* the resulting buffer is terminated with a '\0'
* s is treated as a un-terminated string (a \0 is handled a normal character)
*
* @param b a buffer
* @param s the string
* @param s_len size of the string (without the terminating \0)
*/
int buffer_append_string_len(buffer *b, const char *s, size_t s_len) {
if (!s || !b) return -1;
if (s_len == 0) return 0;
buffer_prepare_append(b, s_len + 1);
if (b->used == 0)
b->used++;
memcpy(b->ptr + b->used - 1, s, s_len);
b->used += s_len;
b->ptr[b->used - 1] = '\0';
return 0;
}
int buffer_append_string_buffer(buffer *b, const buffer *src) {
if (!src) return -1;
if (src->used == 0) return 0;
return buffer_append_string_len(b, src->ptr, src->used - 1);
}
int buffer_append_memory(buffer *b, const char *s, size_t s_len) {
if (!s || !b) return -1;
if (s_len == 0) return 0;
buffer_prepare_append(b, s_len);
memcpy(b->ptr + b->used, s, s_len);
b->used += s_len;
return 0;
}
int buffer_copy_memory(buffer *b, const char *s, size_t s_len) {
if (!s || !b) return -1;
b->used = 0;
return buffer_append_memory(b, s, s_len);
}
int buffer_append_long_hex(buffer *b, unsigned long value) {
char *buf;
int shift = 0;
unsigned long copy = value;
while (copy) {
copy >>= 4;
shift++;
}
if (shift == 0)
shift++;
if (shift & 0x01)
shift++;
buffer_prepare_append(b, shift + 1);
if (b->used == 0)
b->used++;
buf = b->ptr + (b->used - 1);
b->used += shift;
shift <<= 2;
while (shift > 0) {
shift -= 4;
*(buf++) = hex_chars[(value >> shift) & 0x0F];
}
*buf = '\0';
return 0;
}
int LI_ltostr(char *buf, long val) {
char swap;
char *end;
int len = 1;
if (val < 0) {
len++;
*(buf++) = '-';
val = -val;
}
end = buf;
while (val > 9) {
*(end++) = '0' + (val % 10);
val = val / 10;
}
*(end) = '0' + val;
*(end + 1) = '\0';
len += end - buf;
while (buf < end) {
swap = *end;
*end = *buf;
*buf = swap;
buf++;
end--;
}
return len;
}
int buffer_append_long(buffer *b, long val) {
if (!b) return -1;
buffer_prepare_append(b, 32);
if (b->used == 0)
b->used++;
b->used += LI_ltostr(b->ptr + (b->used - 1), val);
return 0;
}
int buffer_copy_long(buffer *b, long val) {
if (!b) return -1;
b->used = 0;
return buffer_append_long(b, val);
}
#if !defined(SIZEOF_LONG) || (SIZEOF_LONG != SIZEOF_OFF_T)
int buffer_append_off_t(buffer *b, off_t val) {
char swap;
char *end;
char *start;
int len = 1;
if (!b) return -1;
buffer_prepare_append(b, 32);
if (b->used == 0)
b->used++;
start = b->ptr + (b->used - 1);
if (val < 0) {
len++;
*(start++) = '-';
val = -val;
}
end = start;
while (val > 9) {
*(end++) = '0' + (val % 10);
val = val / 10;
}
*(end) = '0' + val;
*(end + 1) = '\0';
len += end - start;
while (start < end) {
swap = *end;
*end = *start;
*start = swap;
start++;
end--;
}
b->used += len;
return 0;
}
int buffer_copy_off_t(buffer *b, off_t val) {
if (!b) return -1;
b->used = 0;
return buffer_append_off_t(b, val);
}
#endif /* !defined(SIZEOF_LONG) || (SIZEOF_LONG != SIZEOF_OFF_T) */
char int2hex(char c) {
return hex_chars[(c & 0x0F)];
}
/* converts hex char (0-9, A-Z, a-z) to decimal.
* returns 0xFF on invalid input.
*/
char hex2int(unsigned char hex) {
hex = hex - '0';
if (hex > 9) {
hex = (hex + '0' - 1) | 0x20;
hex = hex - 'a' + 11;
}
if (hex > 15)
hex = 0xFF;
return hex;
}
/**
* init the buffer
*
*/
buffer_array* buffer_array_init(void) {
buffer_array *b;
b = malloc(sizeof(*b));
force_assert(b);
b->ptr = NULL;
b->size = 0;
b->used = 0;
return b;
}
void buffer_array_reset(buffer_array *b) {
size_t i;
if (!b) return;
/* if they are too large, reduce them */
for (i = 0; i < b->used; i++) {
buffer_reset(b->ptr[i]);
}
b->used = 0;
}
/**
* free the buffer_array
*
*/
void buffer_array_free(buffer_array *b) {
size_t i;
if (!b) return;
for (i = 0; i < b->size; i++) {
if (b->ptr[i]) buffer_free(b->ptr[i]);
}
free(b->ptr);
free(b);
}
buffer *buffer_array_append_get_buffer(buffer_array *b) {
size_t i;
if (b->size == 0) {
b->size = 16;
b->ptr = malloc(sizeof(*b->ptr) * b->size);
force_assert(b->ptr);
for (i = 0; i < b->size; i++) {
b->ptr[i] = NULL;
}
} else if (b->size == b->used) {
b->size += 16;
b->ptr = realloc(b->ptr, sizeof(*b->ptr) * b->size);
force_assert(b->ptr);
for (i = b->used; i < b->size; i++) {
b->ptr[i] = NULL;
}
}
if (b->ptr[b->used] == NULL) {
b->ptr[b->used] = buffer_init();
}
b->ptr[b->used]->used = 0;
return b->ptr[b->used++];
}
char * buffer_search_string_len(buffer *b, const char *needle, size_t len) {
size_t i;
if (len == 0) return NULL;
if (needle == NULL) return NULL;
if (b->used < len) return NULL;
for(i = 0; i < b->used - len; i++) {
if (0 == memcmp(b->ptr + i, needle, len)) {
return b->ptr + i;
}
}
return NULL;
}
buffer *buffer_init_string(const char *str) {
buffer *b = buffer_init();
buffer_copy_string(b, str);
return b;
}
int buffer_is_empty(buffer *b) {
if (!b) return 1;
return (b->used == 0);
}
/**
* check if two buffer contain the same data
*
* HISTORY: this function was pretty much optimized, but didn't handled
* alignment properly.
*/
int buffer_is_equal(buffer *a, buffer *b) {
if (a->used != b->used) return 0;
if (a->used == 0) return 1;
return (0 == strcmp(a->ptr, b->ptr));
}
int buffer_is_equal_string(buffer *a, const char *s, size_t b_len) {
buffer b;
b.ptr = (char *)s;
b.used = b_len + 1;
return buffer_is_equal(a, &b);
}
/* buffer_is_equal_caseless_string(b, CONST_STR_LEN("value")) */
int buffer_is_equal_caseless_string(buffer *a, const char *s, size_t b_len) {
if (a->used != b_len + 1) return 0;
return (0 == strcasecmp(a->ptr, s));
}
int buffer_caseless_compare(const char *a, size_t a_len, const char *b, size_t b_len) {
size_t const len = (a_len < b_len) ? a_len : b_len;
size_t i;
for (i = 0; i < len; ++i) {
unsigned char ca = a[i], cb = b[i];
if (ca == cb) continue;
/* always lowercase for transitive results */
#if 1
if (ca >= 'A' && ca <= 'Z') ca |= 32;
if (cb >= 'A' && cb <= 'Z') cb |= 32;
#else
/* try to produce code without branching (jumps) */
ca |= ((unsigned char)(ca - (unsigned char)'A') <= (unsigned char)('Z' - 'A')) ? 32 : 0;
cb |= ((unsigned char)(cb - (unsigned char)'A') <= (unsigned char)('Z' - 'A')) ? 32 : 0;
#endif
if (ca == cb) continue;
return ca - cb;
}
if (a_len == b_len) return 0;
return a_len - b_len;
}
/**
* check if the rightmost bytes of the string are equal.
*
*
*/
int buffer_is_equal_right_len(buffer *b1, buffer *b2, size_t len) {
/* no, len -> equal */
if (len == 0) return 1;
/* len > 0, but empty buffers -> not equal */
if (b1->used == 0 || b2->used == 0) return 0;
/* buffers too small -> not equal */
if (b1->used - 1 < len || b2->used - 1 < len) return 0;
if (0 == strncmp(b1->ptr + b1->used - 1 - len,
b2->ptr + b2->used - 1 - len, len)) {
return 1;
}
return 0;
}
int buffer_copy_string_hex(buffer *b, const char *in, size_t in_len) {
size_t i;
/* BO protection */
if (in_len * 2 < in_len) return -1;
buffer_prepare_copy(b, in_len * 2 + 1);
for (i = 0; i < in_len; i++) {
b->ptr[b->used++] = hex_chars[(in[i] >> 4) & 0x0F];
b->ptr[b->used++] = hex_chars[in[i] & 0x0F];
}
b->ptr[b->used++] = '\0';
return 0;
}
/* everything except: ! ( ) * - . 0-9 A-Z _ a-z */
static const char encoded_chars_rel_uri_part[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F control chars */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, /* 20 - 2F space " # $ % & ' + , / */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* 30 - 3F : ; < = > ? */
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40 - 4F @ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, /* 50 - 5F [ \ ] ^ */
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6F ` */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, /* 70 - 7F { | } ~ DEL */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80 - 8F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 90 - 9F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* A0 - AF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* B0 - BF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* C0 - CF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* D0 - DF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* E0 - EF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - FF */
};
/* everything except: ! ( ) * - . / 0-9 A-Z _ a-z */
static const char encoded_chars_rel_uri[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F control chars */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, /* 20 - 2F space " # $ % & ' + , */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, /* 30 - 3F : ; < = > ? */
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40 - 4F @ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, /* 50 - 5F [ \ ] ^ */
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6F ` */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, /* 70 - 7F { | } ~ DEL */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80 - 8F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 90 - 9F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* A0 - AF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* B0 - BF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* C0 - CF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* D0 - DF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* E0 - EF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - FF */
};
static const char encoded_chars_html[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F control chars */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 20 - 2F & */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, /* 30 - 3F < > */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40 - 4F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 50 - 5F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* 70 - 7F DEL */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80 - 8F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 90 - 9F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* A0 - AF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* B0 - BF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* C0 - CF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* D0 - DF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* E0 - EF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - FF */
};
static const char encoded_chars_minimal_xml[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F control chars */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 20 - 2F & */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, /* 30 - 3F < > */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40 - 4F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 50 - 5F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* 70 - 7F DEL */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* C0 - CF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* D0 - DF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* E0 - EF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* F0 - FF */
};
static const char encoded_chars_hex[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F control chars */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 - 2F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 - 3F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 - 4F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 - 5F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 - 6F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 - 7F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 80 - 8F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 90 - 9F */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* A0 - AF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* B0 - BF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* C0 - CF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* D0 - DF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* E0 - EF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* F0 - FF */
};
static const char encoded_chars_http_header[] = {
/*
0 1 2 3 4 5 6 7 8 9 A B C D E F
*/
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* 00 - 0F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 - 1F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 20 - 2F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 30 - 3F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 40 - 4F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 50 - 5F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 60 - 6F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 70 - 7F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* C0 - CF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* D0 - DF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* E0 - EF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* F0 - FF */
};
int buffer_append_string_encoded(buffer *b, const char *s, size_t s_len, buffer_encoding_t encoding) {
unsigned char *ds, *d;
size_t d_len, ndx;
const char *map = NULL;
if (!s || !b) return -1;
if (b->ptr[b->used - 1] != '\0') {
SEGFAULT();
}
if (s_len == 0) return 0;
switch(encoding) {
case ENCODING_REL_URI:
map = encoded_chars_rel_uri;
break;
case ENCODING_REL_URI_PART:
map = encoded_chars_rel_uri_part;
break;
case ENCODING_HTML:
map = encoded_chars_html;
break;
case ENCODING_MINIMAL_XML:
map = encoded_chars_minimal_xml;
break;
case ENCODING_HEX:
map = encoded_chars_hex;
break;
case ENCODING_HTTP_HEADER:
map = encoded_chars_http_header;
break;
case ENCODING_UNSET:
break;
}
force_assert(map != NULL);
/* count to-be-encoded-characters */
for (ds = (unsigned char *)s, d_len = 0, ndx = 0; ndx < s_len; ds++, ndx++) {
if (map[*ds]) {
switch(encoding) {
case ENCODING_REL_URI:
case ENCODING_REL_URI_PART:
d_len += 3;
break;
case ENCODING_HTML:
case ENCODING_MINIMAL_XML:
d_len += 6;
break;
case ENCODING_HTTP_HEADER:
case ENCODING_HEX:
d_len += 2;
break;
case ENCODING_UNSET:
break;
}
} else {
d_len ++;
}
}
buffer_prepare_append(b, d_len);
for (ds = (unsigned char *)s, d = (unsigned char *)b->ptr + b->used - 1, d_len = 0, ndx = 0; ndx < s_len; ds++, ndx++) {
if (map[*ds]) {
switch(encoding) {
case ENCODING_REL_URI:
case ENCODING_REL_URI_PART:
d[d_len++] = '%';
d[d_len++] = hex_chars[((*ds) >> 4) & 0x0F];
d[d_len++] = hex_chars[(*ds) & 0x0F];
break;
case ENCODING_HTML:
case ENCODING_MINIMAL_XML:
d[d_len++] = '&';
d[d_len++] = '#';
d[d_len++] = 'x';
d[d_len++] = hex_chars[((*ds) >> 4) & 0x0F];
d[d_len++] = hex_chars[(*ds) & 0x0F];
d[d_len++] = ';';
break;
case ENCODING_HEX:
d[d_len++] = hex_chars[((*ds) >> 4) & 0x0F];
d[d_len++] = hex_chars[(*ds) & 0x0F];
break;
case ENCODING_HTTP_HEADER:
d[d_len++] = *ds;
d[d_len++] = '\t';
break;
case ENCODING_UNSET:
break;
}
} else {
d[d_len++] = *ds;
}
}
/* terminate buffer and calculate new length */
b->ptr[b->used + d_len - 1] = '\0';
b->used += d_len;
return 0;
}
/* decodes url-special-chars inplace.
* replaces non-printable characters with '_'
*/
static int buffer_urldecode_internal(buffer *url, int is_query) {
unsigned char high, low;
const char *src;
char *dst;
if (!url || !url->ptr) return -1;
src = (const char*) url->ptr;
dst = (char*) url->ptr;
while ((*src) != '\0') {
if (is_query && *src == '+') {
*dst = ' ';
} else if (*src == '%') {
*dst = '%';
high = hex2int(*(src + 1));
if (high != 0xFF) {
low = hex2int(*(src + 2));
if (low != 0xFF) {
high = (high << 4) | low;
/* map control-characters out */
if (high < 32 || high == 127) high = '_';
*dst = high;
src += 2;
}
}
} else {
*dst = *src;
}
dst++;
src++;
}
*dst = '\0';
url->used = (dst - url->ptr) + 1;
return 0;
}
int buffer_urldecode_path(buffer *url) {
return buffer_urldecode_internal(url, 0);
}
int buffer_urldecode_query(buffer *url) {
return buffer_urldecode_internal(url, 1);
}
/* Remove "/../", "//", "/./" parts from path.
*
* /blah/.. gets /
* /blah/../foo gets /foo
* /abc/./xyz gets /abc/xyz
* /abc//xyz gets /abc/xyz
*
* NOTE: src and dest can point to the same buffer, in which case,
* the operation is performed in-place.
*/
int buffer_path_simplify(buffer *dest, buffer *src)
{
int toklen;
char c, pre1;
char *start, *slash, *walk, *out;
unsigned short pre;
if (src == NULL || src->ptr == NULL || dest == NULL)
return -1;
if (src == dest)
buffer_prepare_append(dest, 1);
else
buffer_prepare_copy(dest, src->used + 1);
walk = src->ptr;
start = dest->ptr;
out = dest->ptr;
slash = dest->ptr;
#if defined(__WIN32) || defined(__CYGWIN__)
/* cygwin is treating \ and / the same, so we have to that too
*/
for (walk = src->ptr; *walk; walk++) {
if (*walk == '\\') *walk = '/';
}
walk = src->ptr;
#endif
while (*walk == ' ') {
walk++;
}
pre1 = *(walk++);
c = *(walk++);
pre = pre1;
if (pre1 != '/') {
pre = ('/' << 8) | pre1;
*(out++) = '/';
}
*(out++) = pre1;
if (pre1 == '\0') {
dest->used = (out - start) + 1;
return 0;
}
while (1) {
if (c == '/' || c == '\0') {
toklen = out - slash;
if (toklen == 3 && pre == (('.' << 8) | '.')) {
out = slash;
if (out > start) {
out--;
while (out > start && *out != '/') {
out--;
}
}
if (c == '\0')
out++;
} else if (toklen == 1 || pre == (('/' << 8) | '.')) {
out = slash;
if (c == '\0')
out++;
}
slash = out;
}
if (c == '\0')
break;
pre1 = c;
pre = (pre << 8) | pre1;
c = *walk;
*out = pre1;
out++;
walk++;
}
*out = '\0';
dest->used = (out - start) + 1;
return 0;
}
int light_isdigit(int c) {
return (c >= '0' && c <= '9');
}
int light_isxdigit(int c) {
if (light_isdigit(c)) return 1;
c |= 32;
return (c >= 'a' && c <= 'f');
}
int light_isalpha(int c) {
c |= 32;
return (c >= 'a' && c <= 'z');
}
int light_isalnum(int c) {
return light_isdigit(c) || light_isalpha(c);
}
int buffer_to_lower(buffer *b) {
char *c;
if (b->used == 0) return 0;
for (c = b->ptr; *c; c++) {
if (*c >= 'A' && *c <= 'Z') {
*c |= 32;
}
}
return 0;
}
int buffer_to_upper(buffer *b) {
char *c;
if (b->used == 0) return 0;
for (c = b->ptr; *c; c++) {
if (*c >= 'a' && *c <= 'z') {
*c &= ~32;
}
}
return 0;
}
#ifdef HAVE_LIBUNWIND
# define UNW_LOCAL_ONLY
# include <libunwind.h>
void print_backtrace(FILE *file) {
unw_cursor_t cursor;
unw_context_t context;
int ret;
unsigned int frame = 0;
if (0 != (ret = unw_getcontext(&context))) goto error;
if (0 != (ret = unw_init_local(&cursor, &context))) goto error;
fprintf(file, "Backtrace:\n");
while (0 < (ret = unw_step(&cursor))) {
unw_word_t proc_ip = 0;
unw_proc_info_t procinfo;
char procname[256];
unw_word_t proc_offset = 0;
if (0 != (ret = unw_get_reg(&cursor, UNW_REG_IP, &proc_ip))) goto error;
if (0 == proc_ip) {
/* without an IP the other functions are useless; unw_get_proc_name would return UNW_EUNSPEC */
++frame;
fprintf(file, "%u: (nil)\n", frame);
continue;
}
if (0 != (ret = unw_get_proc_info(&cursor, &procinfo))) goto error;
if (0 != (ret = unw_get_proc_name(&cursor, procname, sizeof(procname), &proc_offset))) {
switch (-ret) {
case UNW_ENOMEM:
memset(procname + sizeof(procname) - 4, '.', 3);
procname[sizeof(procname) - 1] = '\0';
break;
case UNW_ENOINFO:
procname[0] = '?';
procname[1] = '\0';
proc_offset = 0;
break;
default:
snprintf(procname, sizeof(procname), "?? (unw_get_proc_name error %d)", -ret);
break;
}
}
++frame;
fprintf(file, "%u: %s (+0x%x) [%p]\n",
frame,
procname,
(unsigned int) proc_offset,
(void*)(uintptr_t)proc_ip);
}
if (0 != ret) goto error;
return;
error:
fprintf(file, "Error while generating backtrace: unwind error %i\n", (int) -ret);
}
#else
void print_backtrace(FILE *file) {
UNUSED(file);
}
#endif
void log_failed_assert(const char *filename, unsigned int line, const char *msg) {
/* can't use buffer here; could lead to recursive assertions */
fprintf(stderr, "%s.%d: %s\n", filename, line, msg);
print_backtrace(stderr);
fflush(stderr);
abort();
}