its all C now

Makefile

@@ -1,43 +1,43 @@
 .PHONY: clean run
 
 ifeq (${DEBUG}, 1)
-  CXXFLAGS += -DDEBUG -O0 -ggdb -fno-inline	
+  CFLAGS += -DDEBUG -O0 -ggdb -fno-inline	
   WRAP   := valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all 
 else
-  CXXFLAGS += -O3 -fno-stack-protector -fno-exceptions -fno-rtti
+  CFLAGS += -O3
 endif
 
 LIBFLAGS := $$(pkgconf --cflags ncurses readline sqlite3)
-CXXFLAGS += -std=gnu++20 -I./source/ -I./object/ -I./ ${LIBFLAGS}
-CXXFLAGS += -Wall -Wextra -Wpedantic 
-LINKasd  += $$(pkgconf --libs ncurses readline sqlite3) 
+CFLAGS   += -std=c2x -I./source/ -I./object/ -I./ ${LIBFLAGS}
+CFLAGS   += -Wall -Wextra -Wpedantic 
+LDLIBS   += $$(pkgconf --libs ncurses readline sqlite3) 
 
 OBJECT.d:=object/
 SOURCE.d:=source/
-SOURCE:=argument_yy.tab.cpp bash_history.yy.cpp main.cpp cli.cpp tui.cpp storage.cpp damerau_levenshtein.cpp
+SOURCE:=argument_yy.tab.c bash_history.yy.c main.c cli.c tui.c storage.c damerau_levenshtein.c
 OBJECT:=$(addprefix ${OBJECT.d},$(addsuffix .o,$(basename ${SOURCE})))
 SOURCE:=$(addprefix ${SOURCE.d},${SOURCE})
 
 OUTPUT:=histui
 
 ${OUTPUT}: ${OBJECT}
-	${LINK.cpp} ${OBJECT} ${LINKasd} -o ${OUTPUT}
+	${LINK.c} -o ${OUTPUT} ${OBJECT} ${LDLIBS}
 
-object/%.yy.cpp: source/%.l
-	flex --prefix=$*_ --header-file=$(basename $@).hpp -o $@ $<
+object/%.yy.c: source/%.l
+	flex --prefix=$*_ --header-file=$(basename $@).h -o $@ $<
 
-object/%.tab.cpp: source/%.y
-	bison --name-prefix=$*_ --header=$(basename $@).hpp -o $@ $<
+object/%.tab.c: source/%.y
+	bison --name-prefix=$*_ --header=$(basename $@).h -o $@ $<
 
-object/%.o: object/%.l.cpp
-	${COMPILE.cpp} $< -o $@
+object/%.o: object/%.l.c
+	${COMPILE.c} $< -o $@
 
-object/%.o: source/%.cpp
-	${COMPILE.cpp} $< -o $@
+object/%.o: source/%.c
+	${COMPILE.c} $< -o $@
 
 clean:
-	-rm ${OBJECT.d}/*
-	-rm ./${OUTPUT}
+	-${RM} ${OBJECT.d}/*
+	-${RM} ./${OUTPUT}
 
 test:
 	${WRAP} ./${OUTPUT}

documentation/TODO.md

@@ -1,4 +1,4 @@
-+ make (potentially slow) queries cancel using multi threading
-+ scroll lags
++ scroll flashes
 + technical dept in tui.cpp
-+ migrate to C
++ man page
++ readme

source/argument_yy.y

@@ -2,8 +2,9 @@
 %token TUI ENABLE
 %token LEVENSTEIN CASELESS
 %{
-    #include "cli.hpp"
-    #include "storage.hpp"
+    #include <stdlib.h>
+    #include "cli.h"
+    #include "storage.h"
     extern bool do_execute;
 %}
 %%

source/bash_history.l

@@ -1,6 +1,6 @@
 %{
     #include "entry.h"
-    #include "storage.hpp"
+    #include "storage.h"
     long timestamp;
 %}
 %option nodefault

source/cli.c

@@ -1,10 +1,10 @@
-#include "cli.hpp"
+#include "cli.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "argument_yy.tab.hpp"
+#include "argument_yy.tab.h"
 
 int * arg_tokens;
 
@@ -36,20 +36,18 @@ void enable(void) {
     );
     */
     puts(
-        R"delim(
-function _histui_run() {
-    COMMANDFILE="${XDG_CACHE_HOME}/histui_command.txt"
-    if ! [ -v HISTUICMD ]; then
-        HISTUICMD="histui tui"
-    fi
-    HISTFILE=$HISTFILE ${HISTUICMD} 3> "${COMMANDFILE}"
-    READLINE_LINE=$(cat "${COMMANDFILE}")
-    READLINE_POINT=${#READLINE_LINE}
-}
-
-bind -x '"\e[A": _histui_run'
-bind -x '"\C-r": _histui_run'
-        )delim"
+        "function _histui_run() {\n"
+        "    COMMANDFILE=\"${XDG_CACHE_HOME}/histui_command.txt\"\n"
+        "    if ! [ -v HISTUICMD ]; then\n"
+        "        HISTUICMD=\"histui tui\"\n"
+        "    fi\n"
+        "    HISTFILE=$HISTFILE ${HISTUICMD} 3> \"${COMMANDFILE}\"\n"
+        "    READLINE_LINE=$(cat \"${COMMANDFILE}\")\n"
+        "    READLINE_POINT=${#READLINE_LINE}\n"
+        "}\n"
+        "\n"
+        "bind -x '\"\\e[A\": _histui_run'\n"
+        "bind -x '\"\\C-r\": _histui_run'\n"
     );
 }
 

source/main.c

@@ -2,10 +2,10 @@
 #include <pthread.h>
 #include <sys/ioctl.h>
 #include <unistd.h>
-#include "cli.hpp"
-#include "bash_history.yy.hpp"
-#include "storage.hpp"
-#include "tui.hpp"
+#include "cli.h"
+#include "bash_history.yy.h"
+#include "storage.h"
+#include "tui.h"
 
 bool do_run = true;
 bool do_execute = false;
@@ -60,14 +60,15 @@ void export_result(const char * const result) {
          * XXX: if anyone knows a better method, please tell me
          */
         int fd[2];
-        pipe(fd);
+        int rc = pipe(fd);
+        (void)rc;
         dprintf(3, result);
         close(fd[0]);
         close(fd[1]);
     }
 }
 
-void * async(void * arg) {
+void * async([[maybe_unused]] void * arg) {
     while (do_run) {
         tui_take_input();
         if (is_input_changed) {

source/storage.c

@@ -1,8 +1,9 @@
-#include "storage.hpp"
+#include "storage.h"
 
 #include <stddef.h>
+#include <iso646.h>
 #include <sqlite3.h>
-#include "damerau_levenshtein.hpp"
+#include "damerau_levenshtein.h"
 
 /* I would heavily prefer to not have dynamically generated SQL.
  * This might became a scaling issue in the future tho,

source/tui.c

@@ -1,4 +1,4 @@
-#include "tui.hpp"
+#include "tui.h"
 
 #include <time.h>
 #include <ncurses.h>
@@ -59,13 +59,10 @@ int init_tui(void) {
 	rl_deprep_term_function = NULL;
 	rl_change_environment = 0;
 
-	rl_getc_function = []([[maybe_unused]] FILE* ignore){
-		input_available = false;
-		return (int)input;
-	};
-	rl_input_available_hook = []{
-		return input_available;
-	};
+    int getc_function([[maybe_unused]] FILE* ignore) { return (int)(input_available = false); }
+    int return_input_available(void) { return input_available; }
+	rl_getc_function        = getc_function;
+	rl_input_available_hook = return_input_available;
 	rl_redisplay_function   = refresh_input;
     /* We must specify an input handler or readline chimps out,
      *  but we dont want the line to be actually submittable,
@@ -73,8 +70,10 @@ int init_tui(void) {
      *   has typedso far)
      *  so we also override enter to do nothing.
      */
-	rl_callback_handler_install("", []([[maybe_unused]] char *line){ ; });
-    rl_bind_key('\n', []([[maybe_unused]] int i, [[maybe_unused]] int h){ return 0; });
+    void no_op_handler([[maybe_unused]] char *line) { ; }
+    int  no_op_bind([[maybe_unused]] int i, [[maybe_unused]] int h) { return 0; }
+	rl_callback_handler_install("", no_op_handler);
+    rl_bind_key('\n', no_op_bind);
 
     return 0;
 }

source/tui.h

@@ -4,7 +4,7 @@
 #include <stddef.h>
 #include "entry.h"
 
-extern "C" char * rl_line_buffer;
+extern char * rl_line_buffer;
 
 extern size_t entry_lines;
 extern size_t selection_offset;