diff options
Diffstat (limited to 'libnetdata/buffer')
| -rw-r--r-- | libnetdata/buffer/Makefile.am | 9 | ||||
| -rw-r--r-- | libnetdata/buffer/Makefile.in | 464 | ||||
| -rw-r--r-- | libnetdata/buffer/README.md | 11 | ||||
| -rw-r--r-- | libnetdata/buffer/buffer.c | 401 | ||||
| -rw-r--r-- | libnetdata/buffer/buffer.h | 85 |
5 files changed, 970 insertions, 0 deletions
diff --git a/libnetdata/buffer/Makefile.am b/libnetdata/buffer/Makefile.am new file mode 100644 index 00000000..1cb69ed9 --- /dev/null +++ b/libnetdata/buffer/Makefile.am @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-3.0-or-later + +AUTOMAKE_OPTIONS = subdir-objects +MAINTAINERCLEANFILES = $(srcdir)/Makefile.in + + +dist_noinst_DATA = \ + README.md \ + $(NULL) diff --git a/libnetdata/buffer/Makefile.in b/libnetdata/buffer/Makefile.in new file mode 100644 index 00000000..21bbd3cc --- /dev/null +++ b/libnetdata/buffer/Makefile.in @@ -0,0 +1,464 @@ +# Makefile.in generated by automake 1.14.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# SPDX-License-Identifier: GPL-3.0-or-later + +VPATH = @srcdir@ +am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)' +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; \ + *) echo "am__make_running_with_option: internal error: invalid" \ + "target option '$${target_option-}' specified" >&2; \ + exit 1;; \ + esac; \ + has_opt=no; \ + sane_makeflags=$$MAKEFLAGS; \ + if $(am__is_gnu_make); then \ + sane_makeflags=$$MFLAGS; \ + else \ + case $$MAKEFLAGS in \ + *\\[\ \ ]*) \ + bs=\\; \ + sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ + | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ + esac; \ + fi; \ + skip_next=no; \ + strip_trailopt () \ + { \ + flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ + }; \ + for flg in $$sane_makeflags; do \ + test $$skip_next = yes && { skip_next=no; continue; }; \ + case $$flg in \ + *=*|--*) continue;; \ + -*I) strip_trailopt 'I'; skip_next=yes;; \ + -*I?*) strip_trailopt 'I';; \ + -*O) strip_trailopt 'O'; skip_next=yes;; \ + -*O?*) strip_trailopt 'O';; \ + -*l) strip_trailopt 'l'; skip_next=yes;; \ + -*l?*) strip_trailopt 'l';; \ + -[dEDm]) skip_next=yes;; \ + -[JT]) skip_next=yes;; \ + esac; \ + case $$flg in \ + *$$target_option*) has_opt=yes; break;; \ + esac; \ + done; \ + test $$has_opt = yes +am__make_dryrun = (target_option=n; $(am__make_running_with_option)) +am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +subdir = libnetdata/buffer +DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \ + $(dist_noinst_DATA) +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/build/m4/ax_c___atomic.m4 \ + $(top_srcdir)/build/m4/ax_c__generic.m4 \ + $(top_srcdir)/build/m4/ax_c_lto.m4 \ + $(top_srcdir)/build/m4/ax_c_mallinfo.m4 \ + $(top_srcdir)/build/m4/ax_c_mallopt.m4 \ + $(top_srcdir)/build/m4/ax_check_compile_flag.m4 \ + $(top_srcdir)/build/m4/ax_gcc_func_attribute.m4 \ + $(top_srcdir)/build/m4/ax_pthread.m4 \ + $(top_srcdir)/build/m4/jemalloc.m4 \ + $(top_srcdir)/build/m4/tcmalloc.m4 $(top_srcdir)/configure.ac +am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ + $(ACLOCAL_M4) +mkinstalldirs = $(install_sh) -d +CONFIG_HEADER = $(top_builddir)/config.h +CONFIG_CLEAN_FILES = +CONFIG_CLEAN_VPATH_FILES = +AM_V_P = $(am__v_P_@AM_V@) +am__v_P_ = $(am__v_P_@AM_DEFAULT_V@) +am__v_P_0 = false +am__v_P_1 = : +AM_V_GEN = $(am__v_GEN_@AM_V@) +am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@) +am__v_GEN_0 = @echo " GEN " $@; +am__v_GEN_1 = +AM_V_at = $(am__v_at_@AM_V@) +am__v_at_ = $(am__v_at_@AM_DEFAULT_V@) +am__v_at_0 = @ +am__v_at_1 = +SOURCES = +DIST_SOURCES = +am__can_run_installinfo = \ + case $$AM_UPDATE_INFO_DIR in \ + n|no|NO) false;; \ + *) (install-info --version) >/dev/null 2>&1;; \ + esac +DATA = $(dist_noinst_DATA) +am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP) +DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) +ACLOCAL = @ACLOCAL@ +AMTAR = @AMTAR@ +AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@ +AUTOCONF = @AUTOCONF@ +AUTOHEADER = @AUTOHEADER@ +AUTOMAKE = @AUTOMAKE@ +AWK = @AWK@ +CC = @CC@ +CCDEPMODE = @CCDEPMODE@ +CFLAGS = @CFLAGS@ +CPP = @CPP@ +CPPFLAGS = @CPPFLAGS@ +CYGPATH_W = @CYGPATH_W@ +DEFS = @DEFS@ +DEPDIR = @DEPDIR@ +ECHO_C = @ECHO_C@ +ECHO_N = @ECHO_N@ +ECHO_T = @ECHO_T@ +EGREP = @EGREP@ +EXEEXT = @EXEEXT@ +GREP = @GREP@ +INSTALL = @INSTALL@ +INSTALL_DATA = @INSTALL_DATA@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@ +IPMIMONITORING_CFLAGS = @IPMIMONITORING_CFLAGS@ +IPMIMONITORING_LIBS = @IPMIMONITORING_LIBS@ +LDFLAGS = @LDFLAGS@ +LIBCAP_CFLAGS = @LIBCAP_CFLAGS@ +LIBCAP_LIBS = @LIBCAP_LIBS@ +LIBMNL_CFLAGS = @LIBMNL_CFLAGS@ +LIBMNL_LIBS = @LIBMNL_LIBS@ +LIBOBJS = @LIBOBJS@ +LIBS = @LIBS@ +LTLIBOBJS = @LTLIBOBJS@ +MAINT = @MAINT@ +MAKEINFO = @MAKEINFO@ +MATH_CFLAGS = @MATH_CFLAGS@ +MATH_LIBS = @MATH_LIBS@ +MKDIR_P = @MKDIR_P@ +NFACCT_CFLAGS = @NFACCT_CFLAGS@ +NFACCT_LIBS = @NFACCT_LIBS@ +OBJEXT = @OBJEXT@ +OPTIONAL_IPMIMONITORING_CFLAGS = @OPTIONAL_IPMIMONITORING_CFLAGS@ +OPTIONAL_IPMIMONITORING_LIBS = @OPTIONAL_IPMIMONITORING_LIBS@ +OPTIONAL_LIBCAP_CFLAGS = @OPTIONAL_LIBCAP_CFLAGS@ +OPTIONAL_LIBCAP_LIBS = @OPTIONAL_LIBCAP_LIBS@ +OPTIONAL_MATH_CLFAGS = @OPTIONAL_MATH_CLFAGS@ +OPTIONAL_MATH_LIBS = @OPTIONAL_MATH_LIBS@ +OPTIONAL_NFACCT_CLFAGS = @OPTIONAL_NFACCT_CLFAGS@ +OPTIONAL_NFACCT_LIBS = @OPTIONAL_NFACCT_LIBS@ +OPTIONAL_UUID_CLFAGS = @OPTIONAL_UUID_CLFAGS@ +OPTIONAL_UUID_LIBS = @OPTIONAL_UUID_LIBS@ +OPTIONAL_ZLIB_CLFAGS = @OPTIONAL_ZLIB_CLFAGS@ +OPTIONAL_ZLIB_LIBS = @OPTIONAL_ZLIB_LIBS@ +PACKAGE = @PACKAGE@ +PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@ +PACKAGE_NAME = @PACKAGE_NAME@ +PACKAGE_RPM_RELEASE = @PACKAGE_RPM_RELEASE@ +PACKAGE_RPM_VERSION = @PACKAGE_RPM_VERSION@ +PACKAGE_STRING = @PACKAGE_STRING@ +PACKAGE_TARNAME = @PACKAGE_TARNAME@ +PACKAGE_URL = @PACKAGE_URL@ +PACKAGE_VERSION = @PACKAGE_VERSION@ +PATH_SEPARATOR = @PATH_SEPARATOR@ +PKG_CONFIG = @PKG_CONFIG@ +PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@ +PKG_CONFIG_PATH = @PKG_CONFIG_PATH@ +PTHREAD_CC = @PTHREAD_CC@ +PTHREAD_CFLAGS = @PTHREAD_CFLAGS@ +PTHREAD_LIBS = @PTHREAD_LIBS@ +SET_MAKE = @SET_MAKE@ +SHELL = @SHELL@ +SSE_CANDIDATE = @SSE_CANDIDATE@ +STRIP = @STRIP@ +UUID_CFLAGS = @UUID_CFLAGS@ +UUID_LIBS = @UUID_LIBS@ +VERSION = @VERSION@ +ZLIB_CFLAGS = @ZLIB_CFLAGS@ +ZLIB_LIBS = @ZLIB_LIBS@ +abs_builddir = @abs_builddir@ +abs_srcdir = @abs_srcdir@ +abs_top_builddir = @abs_top_builddir@ +abs_top_srcdir = @abs_top_srcdir@ +ac_ct_CC = @ac_ct_CC@ +am__include = @am__include@ +am__leading_dot = @am__leading_dot@ +am__quote = @am__quote@ +am__tar = @am__tar@ +am__untar = @am__untar@ +ax_pthread_config = @ax_pthread_config@ +bindir = @bindir@ +build = @build@ +build_alias = @build_alias@ +build_cpu = @build_cpu@ +build_os = @build_os@ +build_target = @build_target@ +build_vendor = @build_vendor@ +builddir = @builddir@ +cachedir = @cachedir@ +chartsdir = @chartsdir@ +configdir = @configdir@ +datadir = @datadir@ +datarootdir = @datarootdir@ +docdir = @docdir@ +dvidir = @dvidir@ +exec_prefix = @exec_prefix@ +has_jemalloc = @has_jemalloc@ +has_tcmalloc = @has_tcmalloc@ +host = @host@ +host_alias = @host_alias@ +host_cpu = @host_cpu@ +host_os = @host_os@ +host_vendor = @host_vendor@ +htmldir = @htmldir@ +includedir = @includedir@ +infodir = @infodir@ +install_sh = @install_sh@ +libconfigdir = @libconfigdir@ +libdir = @libdir@ +libexecdir = @libexecdir@ +localedir = @localedir@ +localstatedir = @localstatedir@ +logdir = @logdir@ +mandir = @mandir@ +mkdir_p = @mkdir_p@ +nodedir = @nodedir@ +oldincludedir = @oldincludedir@ +pdfdir = @pdfdir@ +pluginsdir = @pluginsdir@ +prefix = @prefix@ +program_transform_name = @program_transform_name@ +psdir = @psdir@ +pythondir = @pythondir@ +registrydir = @registrydir@ +sbindir = @sbindir@ +sharedstatedir = @sharedstatedir@ +srcdir = @srcdir@ +sysconfdir = @sysconfdir@ +target_alias = @target_alias@ +top_build_prefix = @top_build_prefix@ +top_builddir = @top_builddir@ +top_srcdir = @top_srcdir@ +varlibdir = @varlibdir@ +webdir = @webdir@ +AUTOMAKE_OPTIONS = subdir-objects +MAINTAINERCLEANFILES = $(srcdir)/Makefile.in +dist_noinst_DATA = \ + README.md \ + $(NULL) + +all: all-am + +.SUFFIXES: +$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps) + @for dep in $?; do \ + case '$(am__configure_deps)' in \ + *$$dep*) \ + ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \ + && { if test -f $@; then exit 0; else break; fi; }; \ + exit 1;; \ + esac; \ + done; \ + echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu libnetdata/buffer/Makefile'; \ + $(am__cd) $(top_srcdir) && \ + $(AUTOMAKE) --gnu libnetdata/buffer/Makefile +.PRECIOUS: Makefile +Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status + @case '$?' in \ + *config.status*) \ + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \ + *) \ + echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \ + cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \ + esac; + +$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh + +$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh +$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps) + cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh +$(am__aclocal_m4_deps): +tags TAGS: + +ctags CTAGS: + +cscope cscopelist: + + +distdir: $(DISTFILES) + @srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \ + topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \ + list='$(DISTFILES)'; \ + dist_files=`for file in $$list; do echo $$file; done | \ + sed -e "s|^$$srcdirstrip/||;t" \ + -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \ + case $$dist_files in \ + */*) $(MKDIR_P) `echo "$$dist_files" | \ + sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \ + sort -u` ;; \ + esac; \ + for file in $$dist_files; do \ + if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \ + if test -d $$d/$$file; then \ + dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \ + if test -d "$(distdir)/$$file"; then \ + find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \ + fi; \ + if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \ + cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \ + find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \ + fi; \ + cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \ + else \ + test -f "$(distdir)/$$file" \ + || cp -p $$d/$$file "$(distdir)/$$file" \ + || exit 1; \ + fi; \ + done +check-am: all-am +check: check-am +all-am: Makefile $(DATA) +installdirs: +install: install-am +install-exec: install-exec-am +install-data: install-data-am +uninstall: uninstall-am + +install-am: all-am + @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am + +installcheck: installcheck-am +install-strip: + if test -z '$(STRIP)'; then \ + $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ + install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ + install; \ + else \ + $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ + install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ + "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \ + fi +mostlyclean-generic: + +clean-generic: + +distclean-generic: + -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES) + -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES) + +maintainer-clean-generic: + @echo "This command is intended for maintainers to use" + @echo "it deletes files that may require special tools to rebuild." + -test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES) +clean: clean-am + +clean-am: clean-generic mostlyclean-am + +distclean: distclean-am + -rm -f Makefile +distclean-am: clean-am distclean-generic + +dvi: dvi-am + +dvi-am: + +html: html-am + +html-am: + +info: info-am + +info-am: + +install-data-am: + +install-dvi: install-dvi-am + +install-dvi-am: + +install-exec-am: + +install-html: install-html-am + +install-html-am: + +install-info: install-info-am + +install-info-am: + +install-man: + +install-pdf: install-pdf-am + +install-pdf-am: + +install-ps: install-ps-am + +install-ps-am: + +installcheck-am: + +maintainer-clean: maintainer-clean-am + -rm -f Makefile +maintainer-clean-am: distclean-am maintainer-clean-generic + +mostlyclean: mostlyclean-am + +mostlyclean-am: mostlyclean-generic + +pdf: pdf-am + +pdf-am: + +ps: ps-am + +ps-am: + +uninstall-am: + +.MAKE: install-am install-strip + +.PHONY: all all-am check check-am clean clean-generic cscopelist-am \ + ctags-am distclean distclean-generic distdir dvi dvi-am html \ + html-am info info-am install install-am install-data \ + install-data-am install-dvi install-dvi-am install-exec \ + install-exec-am install-html install-html-am install-info \ + install-info-am install-man install-pdf install-pdf-am \ + install-ps install-ps-am install-strip installcheck \ + installcheck-am installdirs maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-generic pdf \ + pdf-am ps ps-am tags-am uninstall uninstall-am + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/libnetdata/buffer/README.md b/libnetdata/buffer/README.md new file mode 100644 index 00000000..a7cfef89 --- /dev/null +++ b/libnetdata/buffer/README.md @@ -0,0 +1,11 @@ +# BUFFER + +`BUFFER` is a convenience library for working with strings in `C`. +Mainly, `BUFFER`s eliminate the need for tracking the string length, thus providing +a safe alternative for string operations. + +Also, they are super fast in printing and appending data to the string and its `buffer_strlen()` +is just a lookup (it does not traverse the string). + +Netdata uses `BUFFER`s for preparing web responses and buffering data to be sent upstream or +to backend databases.
\ No newline at end of file diff --git a/libnetdata/buffer/buffer.c b/libnetdata/buffer/buffer.c new file mode 100644 index 00000000..50672324 --- /dev/null +++ b/libnetdata/buffer/buffer.c @@ -0,0 +1,401 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "../libnetdata.h" + +#define BUFFER_OVERFLOW_EOF "EOF" + +static inline void buffer_overflow_init(BUFFER *b) +{ + b->buffer[b->size] = '\0'; + strcpy(&b->buffer[b->size + 1], BUFFER_OVERFLOW_EOF); +} + +#ifdef NETDATA_INTERNAL_CHECKS +#define buffer_overflow_check(b) _buffer_overflow_check(b, __FILE__, __FUNCTION__, __LINE__) +#else +#define buffer_overflow_check(b) +#endif + +static inline void _buffer_overflow_check(BUFFER *b, const char *file, const char *function, const unsigned long line) +{ + if(b->len > b->size) { + error("BUFFER: length %zu is above size %zu, at line %lu, at function %s() of file '%s'.", b->len, b->size, line, function, file); + b->len = b->size; + } + + if(b->buffer[b->size] != '\0' || strcmp(&b->buffer[b->size + 1], BUFFER_OVERFLOW_EOF) != 0) { + error("BUFFER: detected overflow at line %lu, at function %s() of file '%s'.", line, function, file); + buffer_overflow_init(b); + } +} + + +void buffer_reset(BUFFER *wb) +{ + buffer_flush(wb); + + wb->contenttype = CT_TEXT_PLAIN; + wb->options = 0; + wb->date = 0; + wb->expires = 0; + + buffer_overflow_check(wb); +} + +const char *buffer_tostring(BUFFER *wb) +{ + buffer_need_bytes(wb, 1); + wb->buffer[wb->len] = '\0'; + + buffer_overflow_check(wb); + + return(wb->buffer); +} + +void buffer_char_replace(BUFFER *wb, char from, char to) +{ + char *s = wb->buffer, *end = &wb->buffer[wb->len]; + + while(s != end) { + if(*s == from) *s = to; + s++; + } + + buffer_overflow_check(wb); +} + +// This trick seems to give an 80% speed increase in 32bit systems +// print_calculated_number_llu_r() will just print the digits up to the +// point the remaining value fits in 32 bits, and then calls +// print_calculated_number_lu_r() to print the rest with 32 bit arithmetic. + +inline char *print_number_lu_r(char *str, unsigned long uvalue) { + char *wstr = str; + + // print each digit + do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); + return wstr; +} + +inline char *print_number_llu_r(char *str, unsigned long long uvalue) { + char *wstr = str; + + // print each digit + do *wstr++ = (char)('0' + (uvalue % 10)); while((uvalue /= 10) && uvalue > (unsigned long long)0xffffffff); + if(uvalue) return print_number_lu_r(wstr, uvalue); + return wstr; +} + +inline char *print_number_llu_r_smart(char *str, unsigned long long uvalue) { +#ifdef ENVIRONMENT32 + if(uvalue > (unsigned long long)0xffffffff) + str = print_number_llu_r(str, uvalue); + else + str = print_number_lu_r(str, uvalue); +#else + do *str++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); +#endif + + return str; +} + +void buffer_print_llu(BUFFER *wb, unsigned long long uvalue) +{ + buffer_need_bytes(wb, 50); + + char *str = &wb->buffer[wb->len]; + char *wstr = str; + +#ifdef ENVIRONMENT32 + if(uvalue > (unsigned long long)0xffffffff) + wstr = print_number_llu_r(wstr, uvalue); + else + wstr = print_number_lu_r(wstr, uvalue); +#else + do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10); +#endif + + // terminate it + *wstr = '\0'; + + // reverse it + char *begin = str, *end = wstr - 1, aux; + while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux; + + // return the buffer length + wb->len += wstr - str; +} + +void buffer_strcat(BUFFER *wb, const char *txt) +{ + // buffer_sprintf(wb, "%s", txt); + + if(unlikely(!txt || !*txt)) return; + + buffer_need_bytes(wb, 1); + + char *s = &wb->buffer[wb->len], *start, *end = &wb->buffer[wb->size]; + size_t len = wb->len; + + start = s; + while(*txt && s != end) + *s++ = *txt++; + + len += s - start; + + wb->len = len; + buffer_overflow_check(wb); + + if(*txt) { + debug(D_WEB_BUFFER, "strcat(): increasing web_buffer at position %zu, size = %zu\n", wb->len, wb->size); + len = strlen(txt); + buffer_increase(wb, len); + buffer_strcat(wb, txt); + } + else { + // terminate the string + // without increasing the length + buffer_need_bytes(wb, (size_t)1); + wb->buffer[wb->len] = '\0'; + } +} + +void buffer_strcat_htmlescape(BUFFER *wb, const char *txt) +{ + while(*txt) { + switch(*txt) { + case '&': buffer_strcat(wb, "&"); break; + case '<': buffer_strcat(wb, "<"); break; + case '>': buffer_strcat(wb, ">"); break; + case '"': buffer_strcat(wb, """); break; + case '/': buffer_strcat(wb, "/"); break; + case '\'': buffer_strcat(wb, "'"); break; + default: { + buffer_need_bytes(wb, 1); + wb->buffer[wb->len++] = *txt; + } + } + txt++; + } + + buffer_overflow_check(wb); +} + +void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) +{ + if(unlikely(!fmt || !*fmt)) return; + + buffer_need_bytes(wb, len + 1); + + va_list args; + va_start(args, fmt); + wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args); + va_end(args); + + buffer_overflow_check(wb); + + // the buffer is \0 terminated by vsnprintfz +} + +void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args) +{ + if(unlikely(!fmt || !*fmt)) return; + + buffer_need_bytes(wb, 2); + + size_t len = wb->size - wb->len - 1; + + wb->len += vsnprintfz(&wb->buffer[wb->len], len, fmt, args); + + buffer_overflow_check(wb); + + // the buffer is \0 terminated by vsnprintfz +} + +void buffer_sprintf(BUFFER *wb, const char *fmt, ...) +{ + if(unlikely(!fmt || !*fmt)) return; + + va_list args; + size_t wrote = 0, need = 2, multiplier = 0, len; + + do { + need += wrote + multiplier * WEB_DATA_LENGTH_INCREASE_STEP; + multiplier++; + + debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu, by %zu bytes (wrote = %zu)\n", wb->len, wb->size, need, wrote); + buffer_need_bytes(wb, need); + + len = wb->size - wb->len - 1; + + va_start(args, fmt); + wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args); + va_end(args); + + } while(wrote >= len); + + wb->len += wrote; + + // the buffer is \0 terminated by vsnprintf +} + + +void buffer_rrd_value(BUFFER *wb, calculated_number value) +{ + buffer_need_bytes(wb, 50); + + if(isnan(value) || isinf(value)) { + buffer_strcat(wb, "null"); + return; + } + else + wb->len += print_calculated_number(&wb->buffer[wb->len], value); + + // terminate it + buffer_need_bytes(wb, 1); + wb->buffer[wb->len] = '\0'; + + buffer_overflow_check(wb); +} + +// generate a javascript date, the fastest possible way... +void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds) +{ + // 10 20 30 = 35 + // 01234567890123456789012345678901234 + // Date(2014,04,01,03,28,20) + + buffer_need_bytes(wb, 30); + + char *b = &wb->buffer[wb->len], *p; + unsigned int *q = (unsigned int *)b; + + #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + *q++ = 0x65746144; // "Date" backwards. + #else + *q++ = 0x44617465; // "Date" + #endif + p = (char *)q; + + *p++ = '('; + *p++ = '0' + year / 1000; year %= 1000; + *p++ = '0' + year / 100; year %= 100; + *p++ = '0' + year / 10; + *p++ = '0' + year % 10; + *p++ = ','; + *p = '0' + month / 10; if (*p != '0') p++; + *p++ = '0' + month % 10; + *p++ = ','; + *p = '0' + day / 10; if (*p != '0') p++; + *p++ = '0' + day % 10; + *p++ = ','; + *p = '0' + hours / 10; if (*p != '0') p++; + *p++ = '0' + hours % 10; + *p++ = ','; + *p = '0' + minutes / 10; if (*p != '0') p++; + *p++ = '0' + minutes % 10; + *p++ = ','; + *p = '0' + seconds / 10; if (*p != '0') p++; + *p++ = '0' + seconds % 10; + + unsigned short *r = (unsigned short *)p; + +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + *r++ = 0x0029; // ")\0" backwards. + #else + *r++ = 0x2900; // ")\0" + #endif + + wb->len += (size_t)((char *)r - b - 1); + + // terminate it + wb->buffer[wb->len] = '\0'; + buffer_overflow_check(wb); +} + +// generate a date, the fastest possible way... +void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds) +{ + // 10 20 30 = 35 + // 01234567890123456789012345678901234 + // 2014-04-01 03:28:20 + + buffer_need_bytes(wb, 36); + + char *b = &wb->buffer[wb->len]; + char *p = b; + + *p++ = '0' + year / 1000; year %= 1000; + *p++ = '0' + year / 100; year %= 100; + *p++ = '0' + year / 10; + *p++ = '0' + year % 10; + *p++ = '-'; + *p++ = '0' + month / 10; + *p++ = '0' + month % 10; + *p++ = '-'; + *p++ = '0' + day / 10; + *p++ = '0' + day % 10; + *p++ = ' '; + *p++ = '0' + hours / 10; + *p++ = '0' + hours % 10; + *p++ = ':'; + *p++ = '0' + minutes / 10; + *p++ = '0' + minutes % 10; + *p++ = ':'; + *p++ = '0' + seconds / 10; + *p++ = '0' + seconds % 10; + *p = '\0'; + + wb->len += (size_t)(p - b); + + // terminate it + wb->buffer[wb->len] = '\0'; + buffer_overflow_check(wb); +} + +BUFFER *buffer_create(size_t size) +{ + BUFFER *b; + + debug(D_WEB_BUFFER, "Creating new web buffer of size %zu.", size); + + b = callocz(1, sizeof(BUFFER)); + b->buffer = mallocz(size + sizeof(BUFFER_OVERFLOW_EOF) + 2); + b->buffer[0] = '\0'; + b->size = size; + b->contenttype = CT_TEXT_PLAIN; + buffer_overflow_init(b); + buffer_overflow_check(b); + + return(b); +} + +void buffer_free(BUFFER *b) { + if(unlikely(!b)) return; + + buffer_overflow_check(b); + + debug(D_WEB_BUFFER, "Freeing web buffer of size %zu.", b->size); + + freez(b->buffer); + freez(b); +} + +void buffer_increase(BUFFER *b, size_t free_size_required) { + buffer_overflow_check(b); + + size_t left = b->size - b->len; + + if(left >= free_size_required) return; + + size_t increase = free_size_required - left; + if(increase < WEB_DATA_LENGTH_INCREASE_STEP) increase = WEB_DATA_LENGTH_INCREASE_STEP; + + debug(D_WEB_BUFFER, "Increasing data buffer from size %zu to %zu.", b->size, b->size + increase); + + b->buffer = reallocz(b->buffer, b->size + increase + sizeof(BUFFER_OVERFLOW_EOF) + 2); + b->size += increase; + + buffer_overflow_init(b); + buffer_overflow_check(b); +} diff --git a/libnetdata/buffer/buffer.h b/libnetdata/buffer/buffer.h new file mode 100644 index 00000000..8e431bfd --- /dev/null +++ b/libnetdata/buffer/buffer.h @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_WEB_BUFFER_H +#define NETDATA_WEB_BUFFER_H 1 + +#include "../libnetdata.h" + +#define WEB_DATA_LENGTH_INCREASE_STEP 1024 + +typedef struct web_buffer { + size_t size; // allocation size of buffer, in bytes + size_t len; // current data length in buffer, in bytes + char *buffer; // the buffer itself + uint8_t contenttype; // the content type of the data in the buffer + uint8_t options; // options related to the content + time_t date; // the timestamp this content has been generated + time_t expires; // the timestamp this content expires +} BUFFER; + +// options +#define WB_CONTENT_CACHEABLE 1 +#define WB_CONTENT_NO_CACHEABLE 2 + +// content-types +#define CT_APPLICATION_JSON 1 +#define CT_TEXT_PLAIN 2 +#define CT_TEXT_HTML 3 +#define CT_APPLICATION_X_JAVASCRIPT 4 +#define CT_TEXT_CSS 5 +#define CT_TEXT_XML 6 +#define CT_APPLICATION_XML 7 +#define CT_TEXT_XSL 8 +#define CT_APPLICATION_OCTET_STREAM 9 +#define CT_APPLICATION_X_FONT_TRUETYPE 10 +#define CT_APPLICATION_X_FONT_OPENTYPE 11 +#define CT_APPLICATION_FONT_WOFF 12 +#define CT_APPLICATION_FONT_WOFF2 13 +#define CT_APPLICATION_VND_MS_FONTOBJ 14 +#define CT_IMAGE_SVG_XML 15 +#define CT_IMAGE_PNG 16 +#define CT_IMAGE_JPG 17 +#define CT_IMAGE_GIF 18 +#define CT_IMAGE_XICON 19 +#define CT_IMAGE_ICNS 20 +#define CT_IMAGE_BMP 21 +#define CT_PROMETHEUS 22 + +#define buffer_cacheable(wb) do { (wb)->options |= WB_CONTENT_CACHEABLE; if((wb)->options & WB_CONTENT_NO_CACHEABLE) (wb)->options &= ~WB_CONTENT_NO_CACHEABLE; } while(0) +#define buffer_no_cacheable(wb) do { (wb)->options |= WB_CONTENT_NO_CACHEABLE; if((wb)->options & WB_CONTENT_CACHEABLE) (wb)->options &= ~WB_CONTENT_CACHEABLE; (wb)->expires = 0; } while(0) + +#define buffer_strlen(wb) ((wb)->len) +extern const char *buffer_tostring(BUFFER *wb); + +#define buffer_flush(wb) wb->buffer[(wb)->len = 0] = '\0' +extern void buffer_reset(BUFFER *wb); + +extern void buffer_strcat(BUFFER *wb, const char *txt); +extern void buffer_rrd_value(BUFFER *wb, calculated_number value); + +extern void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds); +extern void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds); + +extern BUFFER *buffer_create(size_t size); +extern void buffer_free(BUFFER *b); +extern void buffer_increase(BUFFER *b, size_t free_size_required); + +extern void buffer_snprintf(BUFFER *wb, size_t len, const char *fmt, ...) PRINTFLIKE(3, 4); +extern void buffer_vsprintf(BUFFER *wb, const char *fmt, va_list args); +extern void buffer_sprintf(BUFFER *wb, const char *fmt, ...) PRINTFLIKE(2,3); +extern void buffer_strcat_htmlescape(BUFFER *wb, const char *txt); + +extern void buffer_char_replace(BUFFER *wb, char from, char to); + +extern char *print_number_lu_r(char *str, unsigned long uvalue); +extern char *print_number_llu_r(char *str, unsigned long long uvalue); +extern char *print_number_llu_r_smart(char *str, unsigned long long uvalue); + +extern void buffer_print_llu(BUFFER *wb, unsigned long long uvalue); + +static inline void buffer_need_bytes(BUFFER *buffer, size_t needed_free_size) { + if(unlikely(buffer->size - buffer->len < needed_free_size)) + buffer_increase(buffer, needed_free_size); +} + +#endif /* NETDATA_WEB_BUFFER_H */ |