Returns a ngx_str_t from a given NULL terminated character array.

Returns an empty ngx_str_t terminated with NULL.

Sets a ngx_str_t to a given character array

Sets a given ngx_str_t to an empty NULL terminated string.

Sets an ASCII ‘A’ to ‘Z’ to lowercase. For other characters it returns the same character.

Sets an ASCII ‘a’ to ‘z’ to uppercase. For other characters it returns the same character.

Runs ngx_tolower() on an entire string who’s length is given. The destination should be pre-allocated to at least the same length as the source.

An alias to the standard strncmp function

An alias to the standard strcmp function

An alias to the standard strlen function

An alias to the standard strstr function

An alias to the standard strchr function

Searches a string based on the pointer to the beginning and end of the string for a given character. Returns a pointer to the first match of that character.

Sets every byte of a given section of memory to zero

An alias for the standard memset function

An alias for the standard memcpy function but does not return the pointer to the destination

A wrapper for the standard memcpy function which returns the pointer of the destination after the copy (dst + n)

An alias for the standard memmove function but does not return the pointer to the destination

A wrapper for the standard memmove function which returns the pointer of the destination after the copy (dst + n)

An alias for the standard memcmp function.

Copies information from one memory location to another. Stops when n bytes are copied or a NULL terminator is hit. Returns the pointer pointer of dst at the point where the copy has finished.

Creates a copy of a string into a newly allocated string in a memory pool created with ngx_create_pool()

An sprintf style wrapper around ngx_vslprintf()

An snprintf style wrapper around ngx_vslprintf()

A wrapper around ngx_vslprintf() similar to snprintf but instead of a maximum length specifier it takes a pointer to the end of the destination memory buffer.

A function similar to the standard vsnprintf but has additional possible format specifiers. It also takes a pointer to the end of the destination memory buffer instead of a length specifier.

A function similar to the standard vsnprintf which is implemented as a wrapper around ngx_vslprintf()

An optimised function similar to the standard strcasecmp

An optimised function similar to the standard strncasecmp

A function similar to the standard strstr but with a maximum search length.

A function similar to the standard strstr but with a length specifier for the s2 parameter.

A function similar to the standard strcasestr but with a length specifier for the s2 parameter.

A function similar to the standard strcasestr but with a pointer to the last character in the search string and a length specifier for the s2 parameter.

A function similar to the standard strncmp but starts at the end of the string.

A function similar to the standard strncasecmp but starts at the end of the string.

Compares two length specified segments of memory.

A function similar to ngx_strcmp() but compares two DNS entries.

A function similar to ngx_strncmp() but compares two paths

A function similar to atoi but has a string length specifier

Converts a floating point number in a string to an integer representation. For example: ngx_atofp("10.2", 4, 2) returns 1020

Converts a number in a text string to a ssize_t

Converts a number in a text string to an off_t

Converts a number in a text string to a time_t

Converts a hexadecimal number in a text string to an integer

Converts binary data to a printable hexadecimal representation of the string

A macro to calculate the base64 encoded length of a string. Evaluates to (((len + 2) / 3) * 4). Any int type can be used.

A macro to calculate the base64 decoded length of a string. Evaluates to (((len + 3) / 4) * 3). Any int type can be used.

Base64 encodes a given input text.

Base64 encodes a given input URL

Base64 decodes a given input

Base64 decodes a given input URL

Validates a UTF8 character. The character pointer pointed to with p is moved to the end of the character. The following table shows the return values:

Returns the number of UTF8 characters in a given string.

Copies a valid UTF8 sequence from one string to another, ignoring invalid characters

Escapes a URI. Different types use slightly different escape algorithms. A dst of NULL will return the number of characters that would be escaped. Otherwise a pointer to the end of data in dst is returned.

Unescapes a URI. Different types use slightly different unescape algorithms.

Escapes HTML entities <, >, & and ". A dst of NULL will return the number of characters that would fill dst. Otherwise a pointer to the end of data in dst is returned.

Escapes the JSON entites \, ", 0x1f. Additional escape sequences \n, \r, \t, \b and \f are also escaped. A dst of NULL will return the number of characters that would fill dst. Otherwise a pointer to the end of data in dst is returned.

An insertion sort algorithm with a template similar to the standard C qsort function. Sorts fixed-length data based on the results of a comparitor callback cmp. cmp should return -1 to left, 1 to shift right and 0 to not shift.

An alias to the standard qsort function

A macro that generates a hash of a single character. Defined as:

((ngx_uint_t) key * 31 + c)

It is designed to be run over an entire string to generate a full hash

Sets a given string to lowercase using ngx_tolower() on every character, stores it in dst and generates a hash from that string using ngx_hash()

Compile a regular expression based on a pre-definied ngx_regex_compile_t structure.

A macro wrapper around pcre_exec to execute the regular expression

Execute an array of regular expressions against a string. This only returns whether or not there is a match, no details of the match