187 lines
6.6 KiB
C
187 lines
6.6 KiB
C
#ifndef QEMU_CUTILS_H
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#define QEMU_CUTILS_H
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/**
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* pstrcpy:
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* @buf: buffer to copy string into
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* @buf_size: size of @buf in bytes
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* @str: string to copy
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*
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* Copy @str into @buf, including the trailing NUL, but do not
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* write more than @buf_size bytes. The resulting buffer is
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* always NUL terminated (even if the source string was too long).
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* If @buf_size is zero or negative then no bytes are copied.
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*
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* This function is similar to strncpy(), but avoids two of that
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* function's problems:
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* * if @str fits in the buffer, pstrcpy() does not zero-fill the
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* remaining space at the end of @buf
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* * if @str is too long, pstrcpy() will copy the first @buf_size-1
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* bytes and then add a NUL
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*/
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void pstrcpy(char *buf, int buf_size, const char *str);
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/**
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* strpadcpy:
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* @buf: buffer to copy string into
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* @buf_size: size of @buf in bytes
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* @str: string to copy
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* @pad: character to pad the remainder of @buf with
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*
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* Copy @str into @buf (but *not* its trailing NUL!), and then pad the
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* rest of the buffer with the @pad character. If @str is too large
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* for the buffer then it is truncated, so that @buf contains the
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* first @buf_size characters of @str, with no terminator.
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*/
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void strpadcpy(char *buf, int buf_size, const char *str, char pad);
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/**
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* pstrcat:
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* @buf: buffer containing existing string
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* @buf_size: size of @buf in bytes
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* @s: string to concatenate to @buf
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*
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* Append a copy of @s to the string already in @buf, but do not
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* allow the buffer to overflow. If the existing contents of @buf
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* plus @str would total more than @buf_size bytes, then write
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* as much of @str as will fit followed by a NUL terminator.
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*
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* @buf must already contain a NUL-terminated string, or the
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* behaviour is undefined.
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*
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* Returns: @buf.
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*/
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char *pstrcat(char *buf, int buf_size, const char *s);
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/**
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* strstart:
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* @str: string to test
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* @val: prefix string to look for
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* @ptr: NULL, or pointer to be written to indicate start of
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* the remainder of the string
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*
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* Test whether @str starts with the prefix @val.
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* If it does (including the degenerate case where @str and @val
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* are equal) then return true. If @ptr is not NULL then a
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* pointer to the first character following the prefix is written
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* to it. If @val is not a prefix of @str then return false (and
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* @ptr is not written to).
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*
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* Returns: true if @str starts with prefix @val, false otherwise.
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*/
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int strstart(const char *str, const char *val, const char **ptr);
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/**
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* stristart:
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* @str: string to test
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* @val: prefix string to look for
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* @ptr: NULL, or pointer to be written to indicate start of
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* the remainder of the string
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*
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* Test whether @str starts with the case-insensitive prefix @val.
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* This function behaves identically to strstart(), except that the
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* comparison is made after calling qemu_toupper() on each pair of
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* characters.
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*
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* Returns: true if @str starts with case-insensitive prefix @val,
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* false otherwise.
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*/
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int stristart(const char *str, const char *val, const char **ptr);
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/**
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* qemu_strnlen:
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* @s: string
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* @max_len: maximum number of bytes in @s to scan
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*
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* Return the length of the string @s, like strlen(), but do not
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* examine more than @max_len bytes of the memory pointed to by @s.
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* If no NUL terminator is found within @max_len bytes, then return
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* @max_len instead.
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*
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* This function has the same behaviour as the POSIX strnlen()
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* function.
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*
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* Returns: length of @s in bytes, or @max_len, whichever is smaller.
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*/
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int qemu_strnlen(const char *s, int max_len);
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/**
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* qemu_strsep:
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* @input: pointer to string to parse
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* @delim: string containing delimiter characters to search for
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*
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* Locate the first occurrence of any character in @delim within
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* the string referenced by @input, and replace it with a NUL.
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* The location of the next character after the delimiter character
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* is stored into @input.
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* If the end of the string was reached without finding a delimiter
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* character, then NULL is stored into @input.
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* If @input points to a NULL pointer on entry, return NULL.
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* The return value is always the original value of *@input (and
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* so now points to a NUL-terminated string corresponding to the
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* part of the input up to the first delimiter).
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*
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* This function has the same behaviour as the BSD strsep() function.
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*
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* Returns: the pointer originally in @input.
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*/
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char *qemu_strsep(char **input, const char *delim);
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#ifdef HAVE_STRCHRNUL
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static inline const char *qemu_strchrnul(const char *s, int c)
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{
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return strchrnul(s, c);
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}
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#else
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const char *qemu_strchrnul(const char *s, int c);
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#endif
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time_t mktimegm(struct tm *tm);
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int qemu_fdatasync(int fd);
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int qemu_msync(void *addr, size_t length, int fd);
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int fcntl_setfl(int fd, int flag);
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int qemu_parse_fd(const char *param);
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int qemu_strtoi(const char *nptr, const char **endptr, int base,
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int *result);
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int qemu_strtoui(const char *nptr, const char **endptr, int base,
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unsigned int *result);
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int qemu_strtol(const char *nptr, const char **endptr, int base,
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long *result);
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int qemu_strtoul(const char *nptr, const char **endptr, int base,
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unsigned long *result);
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int qemu_strtoi64(const char *nptr, const char **endptr, int base,
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int64_t *result);
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int qemu_strtou64(const char *nptr, const char **endptr, int base,
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uint64_t *result);
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int qemu_strtod(const char *nptr, const char **endptr, double *result);
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int qemu_strtod_finite(const char *nptr, const char **endptr, double *result);
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int parse_uint(const char *s, unsigned long long *value, char **endptr,
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int base);
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int parse_uint_full(const char *s, unsigned long long *value, int base);
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int qemu_strtosz(const char *nptr, const char **end, uint64_t *result);
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int qemu_strtosz_MiB(const char *nptr, const char **end, uint64_t *result);
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int qemu_strtosz_metric(const char *nptr, const char **end, uint64_t *result);
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char *size_to_str(uint64_t val);
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/* used to print char* safely */
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#define STR_OR_NULL(str) ((str) ? (str) : "null")
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bool buffer_is_zero(const void *buf, size_t len);
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bool test_buffer_is_zero_next_accel(void);
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/*
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* Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
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* Input is limited to 14-bit numbers
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*/
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int uleb128_encode_small(uint8_t *out, uint32_t n);
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int uleb128_decode_small(const uint8_t *in, uint32_t *n);
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/**
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* qemu_pstrcmp0:
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* @str1: a non-NULL pointer to a C string (*str1 can be NULL)
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* @str2: a non-NULL pointer to a C string (*str2 can be NULL)
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*
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* Compares *str1 and *str2 with g_strcmp0().
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*
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* Returns: an integer less than, equal to, or greater than zero, if
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* *str1 is <, == or > than *str2.
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*/
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int qemu_pstrcmp0(const char **str1, const char **str2);
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#endif
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