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efl/src/lib/eina/eina_strbuf_common.c

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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
# include <Evil.h>
#endif
#include "eina_private.h"
#include "eina_str.h"
#include "eina_magic.h"
#include "eina_error.h"
#include "eina_safety_checks.h"
#include "eina_strbuf.h"
#include "eina_strbuf_common.h"
/*============================================================================*
* Local *
*============================================================================*/
/**
* @cond LOCAL
*/
#define EINA_STRBUF_INIT_SIZE 32
#define EINA_STRBUF_INIT_STEP 32
#define EINA_STRBUF_MAX_STEP 4096
/**
* @endcond
*/
/*============================================================================*
* Global *
*============================================================================*/
/**
* @internal
* @brief Initialize the strbuf module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function sets up the strbuf module of Eina. It is called by
* eina_init().
*
* @see eina_init()
*/
Eina_Bool
eina_strbuf_common_init(void)
{
return EINA_TRUE;
}
/**
* @internal
* @brief Shut down the strbuf module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function shuts down the strbuf module set up by
* eina_strbuf_common_init(). It is called by eina_shutdown().
*
* @see eina_shutdown()
*/
Eina_Bool
eina_strbuf_common_shutdown(void)
{
return EINA_TRUE;
}
/**
* @internal
*
* init the buffer
* @param csize the character size
* @param buf the buffer to init
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*/
static Eina_Bool
_eina_strbuf_common_init(size_t csize, Eina_Strbuf *buf)
{
buf->len = 0;
buf->size = EINA_STRBUF_INIT_SIZE;
buf->step = EINA_STRBUF_INIT_STEP;
eina_error_set(0);
buf->buf = calloc(csize, buf->size);
if (EINA_UNLIKELY(!buf->buf))
{
eina_error_set(EINA_ERROR_OUT_OF_MEMORY);
return EINA_FALSE;
}
return EINA_TRUE;
}
/**
* @internal
*
* init the buffer without allocating the actual string (for managed)
* @param csize the character size
* @param buf the buffer to init
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*/
static Eina_Bool
_eina_strbuf_common_manage_init(size_t csize EINA_UNUSED,
Eina_Strbuf *buf,
void *str,
size_t len)
{
buf->len = len;
buf->size = len + 1;
buf->step = EINA_STRBUF_INIT_STEP;
buf->buf = str;
return EINA_TRUE;
}
/**
* @internal
*
* resize the buffer
* @param csize the character size
* @param buf the buffer to resize
* @param size the minimum size of the buffer
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*/
static inline Eina_Bool
_eina_strbuf_common_resize(size_t csize, Eina_Strbuf *buf, size_t size)
{
size_t new_size, new_step, delta;
void *buffer;
size += 1; // Add extra space for '\0'
/* nothing to do */
if (size == buf->size) return EINA_TRUE;
else if (size > buf->size) delta = size - buf->size;
else delta = buf->size - size;
/* check if should keep the same step (just used while growing) */
if ((delta <= buf->step) && (size > buf->size)) new_step = buf->step;
else
{
new_step = (((delta / EINA_STRBUF_INIT_STEP) + 1)
* EINA_STRBUF_INIT_STEP);
if (new_step > EINA_STRBUF_MAX_STEP) new_step = EINA_STRBUF_MAX_STEP;
}
new_size = (((size / new_step) + 1) * new_step);
/* reallocate the buffer to the new size */
buffer = realloc(buf->buf, new_size * csize);
if (EINA_UNLIKELY(!buffer))
{
eina_error_set(EINA_ERROR_OUT_OF_MEMORY);
return EINA_FALSE;
}
buf->buf = buffer;
buf->size = new_size;
buf->step = new_step;
eina_error_set(0);
return EINA_TRUE;
}
/**
* @internal
*
* If required, enlarge the buffer to fit the new size.
*
* @param csize the character size
* @param buf the buffer to resize
* @param size the minimum size of the buffer
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*/
Eina_Bool
_eina_strbuf_common_grow(size_t csize, Eina_Strbuf *buf, size_t size)
{
if ((size + 1) < buf->size) return EINA_TRUE;
return _eina_strbuf_common_resize(csize, buf, size);
}
/**
* @internal
*
* insert string of known length at random within existing strbuf limits.
*
* @param csize the character size
* @param buf the buffer to resize, must be valid.
* @param str the string to copy, must be valid (!NULL and smaller than @a len)
* @param len the amount of bytes in @a str to copy, must be valid.
* @param pos the position inside buffer to insert, must be valid (smaller
* than eina_strbuf_common_length_get())
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*/
static inline Eina_Bool
_eina_strbuf_common_insert_length(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t len,
size_t pos)
{
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(csize, buf, buf->len + len)))
return EINA_FALSE;
/* move the existing text */
memmove(((unsigned char *)(buf->buf)) + ((len + pos) * csize),
((unsigned char *)(buf->buf)) + (pos * csize),
(buf->len - pos) * csize);
/* and now insert the given string */
memcpy((unsigned char *)buf->buf + (pos * csize), str, len * csize);
buf->len += len;
memset(((unsigned char *)(buf->buf)) + (buf->len * csize), 0, csize);
return EINA_TRUE;
}
/*============================================================================*
* API *
*============================================================================*/
/**
* @internal
* @brief Create a new string buffer.
*
* @param csize the character size
* @return Newly allocated string buffer instance.
*
* This function creates a new string buffer. On error, @c NULL is
* returned and Eina error is set to #EINA_ERROR_OUT_OF_MEMORY. To
* free the resources, use eina_strbuf_common_free().
*
* @see eina_strbuf_common_free()
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_string_get()
*/
Eina_Strbuf *
eina_strbuf_common_new(size_t csize)
{
Eina_Strbuf *buf;
eina_error_set(0);
buf = malloc(sizeof(Eina_Strbuf));
if (EINA_UNLIKELY(!buf))
{
eina_error_set(EINA_ERROR_OUT_OF_MEMORY);
return NULL;
}
if (EINA_UNLIKELY(!_eina_strbuf_common_init(csize, buf)))
{
eina_strbuf_common_free(buf);
return NULL;
}
return buf;
}
/**
* @internal
* @brief Create a new string buffer managing str.
*
* @param csize the character size
* @param str the string to manage
* @param len the length of the string to manage
* @return Newly allocated string buffer instance.
*
* This function creates a new string buffer. On error, @c NULL is
* returned and Eina error is set to #EINA_ERROR_OUT_OF_MEMORY. To
* free the resources, use eina_strbuf_common_free().
*
* @see eina_strbuf_common_free()
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_string_get()
* @since 1.1.0
*/
Eina_Strbuf *
eina_strbuf_common_manage_new(size_t csize,
void *str,
size_t len)
{
Eina_Strbuf *buf;
eina_error_set(0);
buf = malloc(sizeof(Eina_Strbuf));
if (EINA_UNLIKELY(!buf))
{
eina_error_set(EINA_ERROR_OUT_OF_MEMORY);
return NULL;
}
if (EINA_UNLIKELY(!_eina_strbuf_common_manage_init(csize, buf, str, len)))
{
eina_strbuf_common_free(buf);
return NULL;
}
return buf;
}
/**
* @internal
* @brief Free a string buffer.
*
* @param buf The string buffer to free.
*
* This function frees the memory of @p buf. @p buf must have been
* created by eina_strbuf_common_new().
*/
void
eina_strbuf_common_free(Eina_Strbuf *buf)
{
free(buf->buf);
free(buf);
}
/**
* @internal
* @brief Reset a string buffer.
*
* @param csize the character size
* @param buf The string buffer to reset.
*
* This function reset @p buf: the buffer len is set to 0, and the
* string is set to '\\0'. No memory is free'd.
*/
void
eina_strbuf_common_reset(size_t csize, Eina_Strbuf *buf)
{
buf->len = 0;
buf->step = EINA_STRBUF_INIT_STEP;
memset(buf->buf, 0, csize);
}
/**
* @internal
* @brief Append a string to a buffer, reallocating as necessary.
*
* @param csize the character size
* @param buf The string buffer to append to.
* @param str The string to append.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function appends @p str to @p buf. It computes the length of
* @p str, so is slightly slower than eina_strbuf_common_append_length(). If
* the length is known beforehand, consider using that variant. If
* @p buf can't append it, #EINA_FALSE is returned, otherwise #EINA_TRUE is
* returned.
*
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_append_length()
*/
Eina_Bool
eina_strbuf_common_append(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t len)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(csize, buf, buf->len + len)))
return EINA_FALSE;
memcpy(((unsigned char *)(buf->buf)) + (buf->len * csize), str,
(len + 1) * csize);
buf->len += len;
return EINA_TRUE;
}
/**
* @internal
* @brief Append a string to a buffer, reallocating as necessary,
* limited by the given length.
*
* @param csize the character size
* @param buf The string buffer to append to.
* @param str The string to append.
* @param maxlen The maximum number of characters to append.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function appends at most @p maxlen characters of @p str to
* @p buf. It can't appends more than the length of @p str. It
* computes the length of @p str, so is slightly slower than
* eina_strbuf_common_append_length(). If the length is known beforehand,
* consider using that variant (@p maxlen should then be checked so
* that it is greater than the size of @p str). If @p str can not be
* appended, #EINA_FALSE is returned, otherwise, #EINA_TRUE is
* returned.
*
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_append_length()
*/
Eina_Bool
eina_strbuf_common_append_n(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t len,
size_t maxlen)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (len > maxlen) len = maxlen;
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(csize, buf, buf->len + len)))
return EINA_FALSE;
memcpy(((unsigned char *)(buf->buf)) + (buf->len * csize), str,
len * csize);
buf->len += len;
memset(((unsigned char *)(buf->buf)) + (buf->len * csize), 0, csize);
return EINA_TRUE;
}
/**
* @internal
* @brief Append a string of exact length to a buffer, reallocating as necessary.
*
* @param csize the character size
* @param buf The string buffer to append to.
* @param str The string to append.
* @param length The exact length to use.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function appends @p str to @p buf. @p str must be of size at
* most @p length. It is slightly faster than eina_strbuf_common_append() as
* it does not compute the size of @p str. It is useful when dealing
* with strings of known size, such as eina_strngshare. If @p buf
* can't append it, #EINA_FALSE is returned, otherwise #EINA_TRUE is
* returned.
*
* @see eina_stringshare_length()
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_append_n()
*/
Eina_Bool
eina_strbuf_common_append_length(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t length)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(csize, buf, buf->len + length)))
return EINA_FALSE;
memcpy(((unsigned char *)(buf->buf)) + (buf->len * csize), str,
length * csize);
buf->len += length;
memset(((unsigned char *)(buf->buf)) + (buf->len * csize), 0, csize);
return EINA_TRUE;
}
/**
* @internal
* @brief Insert a string to a buffer, reallocating as necessary.
*
* @param csize the character size
* @param buf The string buffer to insert.
* @param str The string to insert.
* @param pos The position to insert the string.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function inserts @p str to @p buf at position @p pos. It
* computes the length of @p str, so is slightly slower than
* eina_strbuf_common_insert_length(). If the length is known beforehand,
* consider using that variant. If @p buf can't insert it, #EINA_FALSE
* is returned, otherwise #EINA_TRUE is returned.
*/
Eina_Bool
eina_strbuf_common_insert(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t len,
size_t pos)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (pos >= buf->len) return eina_strbuf_common_append(csize, buf, str, len);
return _eina_strbuf_common_insert_length(csize, buf, str, len, pos);
}
/**
* @internal
* @brief Insert a string to a buffer, reallocating as necessary. Limited by maxlen.
*
* @param csize the character size
* @param buf The string buffer to insert to.
* @param str The string to insert.
* @param maxlen The maximum number of chars to insert.
* @param pos The position to insert the string.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function inserts @p str ot @p buf at position @p pos, with at
* most @p maxlen bytes. The number of inserted characters can not be
* greater than the length of @p str. It computes the length of
* @p str, so is slightly slower than eina_strbuf_common_insert_length(). If the
* length is known beforehand, consider using that variant (@p maxlen
* should then be checked so that it is greater than the size of
* @p str). If @p str can not be inserted, #EINA_FALSE is returned,
* otherwise, #EINA_TRUE is returned.
*/
Eina_Bool
eina_strbuf_common_insert_n(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t len,
size_t maxlen,
size_t pos)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (pos >= buf->len)
return eina_strbuf_common_append_n(csize, buf, str, len, maxlen);
if (len > maxlen) len = maxlen;
return _eina_strbuf_common_insert_length(csize, buf, str, len, pos);
}
/**
* @internal
* @brief Insert a string of exact length to a buffer, reallocating as necessary.
*
* @param csize the character size
* @param buf The string buffer to insert to.
* @param str The string to insert.
* @param length The exact length to use.
* @param pos The position to insert the string.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function inserts @p str to @p buf. @p str must be of size at
* most @p length. It is slightly faster than eina_strbuf_common_insert() as
* it does not compute the size of @p str. It is useful when dealing
* with strings of known size, such as eina_strngshare. If @p buf
* can't insert it, #EINA_FALSE is returned, otherwise #EINA_TRUE is
* returned.
*
* @see eina_stringshare_length()
* @see eina_strbuf_common_insert()
* @see eina_strbuf_common_insert_n()
*/
Eina_Bool
eina_strbuf_common_insert_length(size_t csize,
Eina_Strbuf *buf,
const void *str,
size_t length,
size_t pos)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(str, EINA_FALSE);
if (pos >= buf->len)
return eina_strbuf_common_append_length(csize, buf, str, length);
return _eina_strbuf_common_insert_length(csize, buf, str, length, pos);
}
/**
* @internal
* @brief Append a character to a string buffer, reallocating as
* necessary.
*
* @param csize the character size
* @param buf The string buffer to append to.
* @param c The char to append.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function inserts @p c to @p buf. If it can not insert it, #EINA_FALSE
* is returned, otherwise #EINA_TRUE is returned.
*/
Eina_Bool
eina_strbuf_common_append_char(size_t csize, Eina_Strbuf *buf, const void *c)
{
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(csize, buf, buf->len + 1)))
return EINA_FALSE;
memcpy(((unsigned char *)(buf->buf)) + ((buf->len)++ *csize), c, csize);
memset(((unsigned char *)(buf->buf)) + (buf->len * csize), 0, csize);
return EINA_TRUE;
}
/**
* @internal
* @brief Insert a character to a string buffer, reallocating as
* necessary.
*
* @param csize the character size
* @param buf The string buffer to insert to.
* @param c The char to insert.
* @param pos The position to insert the char.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function inserts @p c to @p buf at position @p pos. If @p buf
* can't append it, #EINA_FALSE is returned, otherwise #EINA_TRUE is
* returned.
*/
Eina_Bool
eina_strbuf_common_insert_char(size_t csize,
Eina_Strbuf *buf,
const void *c,
size_t pos)
{
if (pos >= buf->len)
return eina_strbuf_common_append_char(csize, buf, c);
return _eina_strbuf_common_insert_length(csize, buf, c, 1, pos);
}
/**
* @internal
* @brief Remove a slice of the given string buffer.
*
* @param csize the character size
* @param buf The string buffer to remove a slice.
* @param start The initial (inclusive) slice position to start
* removing, in bytes.
* @param end The final (non-inclusive) slice position to finish
* removing, in bytes.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function removes a slice of @p buf, starting at @p start
* (inclusive) and ending at @p end (non-inclusive). Both values are
* in bytes. It returns #EINA_FALSE on failure, #EINA_TRUE otherwise.
*/
Eina_Bool
eina_strbuf_common_remove(size_t csize,
Eina_Strbuf *buf,
size_t start,
size_t end)
{
size_t remove_len, tail_len;
if (end >= buf->len) end = buf->len;
if (end <= start) return EINA_TRUE;
remove_len = end - start;
if (remove_len == buf->len)
{
free(buf->buf);
return _eina_strbuf_common_init(csize, buf);
}
tail_len = buf->len - end + 1; /* includes '\0' */
memmove(((unsigned char *)(buf->buf)) + (start * csize),
((unsigned char *)(buf->buf)) + (end * csize),
tail_len * csize);
buf->len -= remove_len;
return _eina_strbuf_common_resize(csize, buf, buf->len);
}
/**
* @internal
* @brief Retrieve a pointer to the contents of a string buffer
*
* @param buf The string buffer.
* @return The current string in the string buffer.
*
* This function returns the string contained in @p buf. The returned
* value must not be modified and will no longer be valid if @p buf is
* modified. In other words, any eina_strbuf_common_append() or similar will
* make that pointer invalid.
*
* @see eina_strbuf_common_string_steal()
*/
const void *
eina_strbuf_common_string_get(const Eina_Strbuf *buf)
{
return buf->buf;
}
/**
* @internal
* @brief Steal the contents of a string buffer.
*
* @param csize the character size
* @param buf The string buffer to steal.
* @return The current string in the string buffer.
*
* This function returns the string contained in @p buf. @p buf is
* then initialized and does not own the returned string anymore. The
* caller must release the memory of the returned string by calling
* free().
*
* @see eina_strbuf_common_string_get()
*/
void *
eina_strbuf_common_string_steal(size_t csize, Eina_Strbuf *buf)
{
void *ret;
ret = buf->buf;
// TODO: Check return value and do something clever
_eina_strbuf_common_init(csize, buf);
return ret;
}
/**
* @internal
* @brief Free the contents of a string buffer but not the buffer.
*
* @param csize the character size
* @param buf The string buffer to free the string of.
*
* This function frees the string contained in @p buf without freeing
* @p buf.
*/
void
eina_strbuf_common_string_free(size_t csize, Eina_Strbuf *buf)
{
free(buf->buf);
_eina_strbuf_common_init(csize, buf);
}
/**
* @internal
* @brief Retrieve the length of the string buffer content.
*
* @param buf The string buffer.
* @return The current length of the string, in bytes.
*
* This function returns the length of @p buf.
*/
size_t
eina_strbuf_common_length_get(const Eina_Strbuf *buf)
{
return buf->len;
}
/**
* @cond LOCAL
*/
/*FIXME: Implementing them here is a hack! */
#ifdef _STRBUF_CSIZE
# undef _STRBUF_CSIZE
#endif
#ifdef _STRBUF_MAGIC
# undef _STRBUF_MAGIC
#endif
#ifdef _STRBUF_MAGIC_STR
# undef _STRBUF_MAGIC_STR
#endif
#define _STRBUF_CSIZE 1
#define _STRBUF_MAGIC EINA_MAGIC_STRBUF
#define _STRBUF_MAGIC_STR __STRBUF_STR_MAGIC_STR
static const char __STRBUF_STR_MAGIC_STR[] = "Eina Strbuf";
/**
* @endcond
*/
EAPI Eina_Bool
eina_strbuf_replace(Eina_Strbuf *buf,
const char *str,
const char *with,
unsigned int n)
{
size_t len1, len2;
char *spos;
size_t pos;
EINA_SAFETY_ON_NULL_RETURN_VAL( str, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(with, EINA_FALSE);
EINA_MAGIC_CHECK_STRBUF(buf, 0);
if (n == 0) return EINA_FALSE;
spos = buf->buf;
while (n--)
{
spos = strstr(spos, str);
if (!spos || *spos == '\0') return EINA_FALSE;
if (n) spos++;
}
pos = spos - (const char *)buf->buf;
len1 = strlen(str);
len2 = strlen(with);
if (len1 != len2)
{
/* resize the buffer if necessary */
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(_STRBUF_CSIZE, buf,
buf->len - len1 + len2)))
return EINA_FALSE; /* move the existing text */
memmove(((unsigned char *)(buf->buf)) + pos + len2,
((unsigned char *)(buf->buf)) + pos + len1,
buf->len - pos - len1);
}
/* and now insert the given string */
memcpy(((unsigned char *)(buf->buf)) + pos, with, len2);
buf->len += len2 - len1;
memset(((unsigned char *)(buf->buf)) + buf->len, 0, 1);
return EINA_TRUE;
}
EAPI int
eina_strbuf_replace_all(Eina_Strbuf *buf, const char *str, const char *with)
{
size_t len1, len2, len;
char *tmp_buf = NULL;
char *spos;
size_t pos, start;
size_t pos_tmp, start_tmp;
int n = 0;
EINA_SAFETY_ON_NULL_RETURN_VAL( str, 0);
EINA_SAFETY_ON_NULL_RETURN_VAL(with, 0);
EINA_MAGIC_CHECK_STRBUF(buf, 0);
spos = strstr(buf->buf, str);
if (!spos || *spos == '\0') return 0;
len1 = strlen(str);
len2 = strlen(with);
/* if the size of the two string is equal, it is fairly easy to replace them
* we don't need to resize the buffer or doing other calculations */
if (len1 == len2)
{
while (spos)
{
memcpy(spos, with, len2);
spos = strstr(spos + len2, str);
n++;
}
return n;
}
pos = pos_tmp = spos - (const char *)buf->buf;
tmp_buf = buf->buf;
buf->buf = malloc(buf->size);
if (EINA_UNLIKELY(!buf->buf))
{
buf->buf = tmp_buf;
return 0;
}
start = start_tmp = 0;
len = buf->len;
while (spos)
{
n++;
len = (len + len2) - len1;
/* resize the buffer if necessary */
if (EINA_UNLIKELY(!_eina_strbuf_common_grow(_STRBUF_CSIZE, buf, len)))
{
/* we have to stop replacing here, because we haven't enough
* memory to go on */
len = (len + len1) - len2;
break;
}
/* copy the untouched text */
memcpy(((unsigned char *)(buf->buf)) + start, tmp_buf + start_tmp,
pos - start);
/* copy the new string */
memcpy(((unsigned char *)(buf->buf)) + pos, with, len2);
/* calculate the next positions */
start_tmp = pos_tmp + len1;
start = pos + len2;
spos = strstr(tmp_buf + start_tmp, str);
/* this calculations don't make sense if spos == NULL, but the
* calculated values won't be used, because the loop will stop
* then */
pos_tmp = spos - tmp_buf;
pos = start + pos_tmp - start_tmp;
}
/* and now copy the rest of the text */
memcpy(((unsigned char *)(buf->buf)) + start, tmp_buf + start_tmp,
len - start);
buf->len = len;
memset(((unsigned char *)(buf->buf)) + buf->len, 0, 1);
free(tmp_buf);
return n;
}
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