diff options
author | MCApollo <34170230+MCApollo@users.noreply.github.com> | 2019-04-29 17:53:00 +0000 |
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committer | MCApollo <34170230+MCApollo@users.noreply.github.com> | 2019-04-29 17:53:00 +0000 |
commit | 59f5fd20e2f59ae186d5a461aef7782dd55e4e7b (patch) | |
tree | 10475faf0b6dcb812b64da679f4ae8ff01c45874 /data/lighttpd/lighttpd-1.4.53/src/buffer.h | |
parent | f06e297cd175cca39745f6d1970225ae88aa68f1 (diff) |
Updated lighttpd.
Diffstat (limited to 'data/lighttpd/lighttpd-1.4.53/src/buffer.h')
-rw-r--r-- | data/lighttpd/lighttpd-1.4.53/src/buffer.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/data/lighttpd/lighttpd-1.4.53/src/buffer.h b/data/lighttpd/lighttpd-1.4.53/src/buffer.h new file mode 100644 index 000000000..df461e1a8 --- /dev/null +++ b/data/lighttpd/lighttpd-1.4.53/src/buffer.h @@ -0,0 +1,226 @@ +#ifndef _BUFFER_H_ +#define _BUFFER_H_ +#include "first.h" + +struct tm; /* declaration */ + +/* generic string + binary data container; contains a terminating 0 in both + * cases + * + * used == 0 indicates a special "empty" state (unset config values); ptr + * might be NULL too then. otherwise an empty string has used == 1 (and ptr[0] + * == 0); + * + * copy/append functions will ensure used >= 1 (i.e. never leave it in the + * special empty state); only buffer_copy_buffer will copy the special empty + * state. + */ +typedef struct { + char *ptr; + + /* "used" includes a terminating 0 */ + size_t used; + /* size of allocated buffer at *ptr */ + size_t size; +} buffer; + +/* create new buffer; either empty or copy given data */ +buffer* buffer_init(void); +buffer* buffer_init_buffer(const buffer *src); /* src can be NULL */ +buffer* buffer_init_string(const char *str); /* str can be NULL */ + +void buffer_free(buffer *b); /* b can be NULL */ +/* truncates to used == 0; frees large buffers, might keep smaller ones for reuse */ +void buffer_reset(buffer *b); /* b can be NULL */ + +/* reset b. if NULL != b && NULL != src, move src content to b. reset src. */ +void buffer_move(buffer *b, buffer *src); + +/* make sure buffer is large enough to store a string of given size + * and a terminating zero. + * sets b to an empty string, and may drop old content. + * @return b->ptr + */ +char* buffer_string_prepare_copy(buffer *b, size_t size); + +/* allocate buffer large enough to be able to append a string of given size + * if b was empty (used == 0) it will contain an empty string (used == 1) + * afterwards + * "used" data is preserved; if not empty buffer must contain a + * zero terminated string. + */ +char* buffer_string_prepare_append(buffer *b, size_t size); + +/* use after prepare_(copy,append) when you have written data to the buffer + * to increase the buffer length by size. also sets the terminating zero. + * requires enough space is present for the terminating zero (prepare with the + * same size to be sure). + */ +void buffer_commit(buffer *b, size_t size); + +/* sets string length: + * - always stores a terminating zero to terminate the "new" string + * - does not modify the string data apart from terminating zero + * - reallocates the buffer iff needed + */ +void buffer_string_set_length(buffer *b, size_t len); + +/* clear buffer + * - invalidate buffer contents + * - unsets used chars but does not modify existing ptr contents + * (b->ptr *is not* set to an empty, '\0'-terminated string "") + */ +static inline void buffer_clear(buffer *b); + +void buffer_copy_string(buffer *b, const char *s); +void buffer_copy_string_len(buffer *b, const char *s, size_t s_len); +static inline void buffer_copy_buffer(buffer *b, const buffer *src); + +void buffer_append_string(buffer *b, const char *s); +void buffer_append_string_len(buffer *b, const char *s, size_t s_len); +static inline void buffer_append_string_buffer(buffer *b, const buffer *src); + +#define buffer_append_uint_hex(b,len) buffer_append_uint_hex_lc((b),(len)) +void buffer_append_uint_hex_lc(buffer *b, uintmax_t len); +void buffer_append_int(buffer *b, intmax_t val); +void buffer_copy_int(buffer *b, intmax_t val); + +void buffer_append_strftime(buffer *b, const char *format, const struct tm *tm); + +/* '-', log_10 (2^bits) = bits * log 2 / log 10 < bits * 0.31, terminating 0 */ +#define LI_ITOSTRING_LENGTH (2 + (8 * sizeof(intmax_t) * 31 + 99) / 100) + +void li_itostrn(char *buf, size_t buf_len, intmax_t val); +void li_utostrn(char *buf, size_t buf_len, uintmax_t val); + +/* buf must be (at least) 2*s_len + 1 big. uses lower-case hex letters. */ +#define li_tohex(buf,buf_len,s,s_len) li_tohex_lc((buf),(buf_len),(s),(s_len)) +void li_tohex_lc(char *buf, size_t buf_len, const char *s, size_t s_len); +void li_tohex_uc(char *buf, size_t buf_len, const char *s, size_t s_len); + +/* NULL buffer or empty buffer (used == 0); + * unset "string" (buffer) config options are initialized to used == 0, + * while setting an empty string leads to used == 1 + */ +static inline int buffer_is_empty(const buffer *b); +/* NULL buffer, empty buffer (used == 0) or empty string (used == 1) */ +static inline int buffer_string_is_empty(const buffer *b); + +int buffer_is_equal(const buffer *a, const buffer *b); +int buffer_is_equal_right_len(const buffer *a, const buffer *b, size_t len); +int buffer_is_equal_string(const buffer *a, const char *s, size_t b_len); +int buffer_is_equal_caseless_string(const buffer *a, const char *s, size_t b_len); +int buffer_caseless_compare(const char *a, size_t a_len, const char *b, size_t b_len); + +void buffer_substr_replace (buffer *b, size_t offset, size_t len, const buffer *replace); + +void buffer_append_string_encoded_hex_lc(buffer *b, const char *s, size_t len); +void buffer_append_string_encoded_hex_uc(buffer *b, const char *s, size_t len); + +typedef enum { + ENCODING_REL_URI, /* for coding a rel-uri (/with space/and%percent) nicely as part of a href */ + ENCODING_REL_URI_PART, /* same as ENC_REL_URL plus coding / too as %2F */ + ENCODING_HTML, /* & becomes & and so on */ + ENCODING_MINIMAL_XML /* minimal encoding for xml */ +} buffer_encoding_t; + +void buffer_append_string_encoded(buffer *b, const char *s, size_t s_len, buffer_encoding_t encoding); + +/* escape non-printable characters; simple escapes for \t, \r, \n; fallback to \xCC */ +void buffer_append_string_c_escaped(buffer *b, const char *s, size_t s_len); + +/* to upper case, replace non alpha-numerics with '_'; if is_http_header prefix with "HTTP_" unless s is "content-type" */ +void buffer_copy_string_encoded_cgi_varnames(buffer *b, const char *s, size_t s_len, int is_http_header); + +void buffer_urldecode_path(buffer *url); +void buffer_urldecode_query(buffer *url); +int buffer_is_valid_UTF8(const buffer *b); +void buffer_path_simplify(buffer *dest, buffer *src); + +void buffer_to_lower(buffer *b); +void buffer_to_upper(buffer *b); + + +/** deprecated */ +char hex2int(unsigned char c); +char int2hex(char i); + +static inline int light_isdigit(int c); +static inline int light_isxdigit(int c); +static inline int light_isalpha(int c); +static inline int light_isalnum(int c); + +static inline int light_isdigit(int c) { + return (c >= '0' && c <= '9'); +} + +static inline int light_isxdigit(int c) { + return light_isdigit(c) || (c |= 32, c >= 'a' && c <= 'f'); +} + +static inline int light_isalpha(int c) { + return (c |= 32, c >= 'a' && c <= 'z'); +} + +static inline int light_isalnum(int c) { + return light_isdigit(c) || light_isalpha(c); +} + + +static inline size_t buffer_string_length(const buffer *b); /* buffer string length without terminating 0 */ +static inline size_t buffer_string_space(const buffer *b); /* maximum length of string that can be stored without reallocating */ +static inline void buffer_append_slash(buffer *b); /* append '/' no non-empty strings not ending in '/' */ +void buffer_append_path_len(buffer *b, const char *a, size_t alen); /* join strings with '/', if '/' not present */ + +#define BUFFER_APPEND_STRING_CONST(x, y) \ + buffer_append_string_len(x, y, sizeof(y) - 1) + +#define BUFFER_COPY_STRING_CONST(x, y) \ + buffer_copy_string_len(x, y, sizeof(y) - 1) + +#define CONST_STR_LEN(x) x, (x) ? sizeof(x) - 1 : 0 +#define CONST_BUF_LEN(x) ((x) ? (x)->ptr : NULL), buffer_string_length(x) + + +#define LI_NORETURN __attribute_noreturn__ + +__attribute_cold__ +void log_failed_assert(const char *filename, unsigned int line, const char *msg) LI_NORETURN; +#define force_assert(x) do { if (!(x)) log_failed_assert(__FILE__, __LINE__, "assertion failed: " #x); } while(0) +#define SEGFAULT() log_failed_assert(__FILE__, __LINE__, "aborted"); + +/* inline implementations */ + +static inline int buffer_is_empty(const buffer *b) { + return NULL == b || 0 == b->used; +} +static inline int buffer_string_is_empty(const buffer *b) { + return NULL == b || b->used < 2; +} + +static inline size_t buffer_string_length(const buffer *b) { + return NULL != b && 0 != b->used ? b->used - 1 : 0; +} + +static inline size_t buffer_string_space(const buffer *b) { + return NULL != b && b->size ? b->size - (b->used | (0 == b->used)) : 0; +} + +static inline void buffer_copy_buffer(buffer *b, const buffer *src) { + buffer_copy_string_len(b, CONST_BUF_LEN(src)); +} + +static inline void buffer_append_string_buffer(buffer *b, const buffer *src) { + buffer_append_string_len(b, CONST_BUF_LEN(src)); +} + +static inline void buffer_append_slash(buffer *b) { + size_t len = buffer_string_length(b); + if (len > 0 && '/' != b->ptr[len-1]) BUFFER_APPEND_STRING_CONST(b, "/"); +} + +static inline void buffer_clear(buffer *b) { + b->used = 0; +} + +#endif |