neogrep: Init repo

.clang-format

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+BasedOnStyle: WebKit
+BreakBeforeBraces: Allman
+AlwaysBreakAfterReturnType: All
+BinPackArguments: true
+BinPackParameters: true
+IndentCaseLabels: true
+IndentWidth: 2
+TabWidth: 2
+UseTab: Never
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+AlignConsecutiveMacros: true
+AlignTrailingComments: true
+PointerAlignment: Left

.gitignore

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+# Files
+*.o
+ng

LICENSE

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+Copyright (c) 2026 Neo-Sekai Club
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Makefile

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+.POSIX:
+
+.SUFFIXES:
+
+include config.mk
+
+BIN_DIR  = $(DESTDIR)$(PREFIX)bin
+BIN_NAME = ng
+SRC      = main.c
+OBJ      = $(SRC:.c=.o)
+
+CFLAGS  = -std=c99 \
+	-Wall \
+	-Wextra \
+	-Wno-deprecated-declarations \
+	-O2
+
+.SUFFIXES: .c .o
+
+.c.o:
+	$(CC) $(CFLAGS) -c $<
+
+ng: $(OBJ)
+	$(CC) -o $@ $(OBJ) $(CFLAGS)
+
+.PHONY: clean install
+
+clean:
+	rm -f $(BIN_NAME) $(OBJ)
+
+install: ng
+	mkdir -p $(BIN_DIR)
+	cp -f $(BIN_NAME) $(BIN_DIR)
+	chmod 755 $(BIN_DIR)/$(BIN_NAME)

README.org

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+#+title:   neogrep - The Recursive Line Checker That Sucks Less
+#+author:  Neo-Sekai Club
+#+options: html-postamble:nil html-preable:nil toc:nil
+
+It's cool to be able to grep your code to see where you may have made some sort of mistake, or when you're doing a debug or valgrind and go "Hey, this is like how many hundreds of lines of code! Where is this problematic function!?". If you're a psychopath, you pipe to grep. If you enjoy using garbage that eats your resources on compile-time, you use ripgrep. neogrep is the option that is meant to suck less and be far simpler.
+
+Is it as robust as real grep? No, but it doesn't need to be. Does it fill the exact same needs as ripgrep? You bet it does. We managed to do this simple task in 115 lines of C code, with a more sane directory structure and build system. ripgrep spans across how many source files, but we narrowed neogrep down into just one. It doesn't need to do more, it needs to do what it's designed to do, and do that efficiently.
+
+Due to neogrep's design, it's easily hackable if you are a C programmer yourself, allowing you (the end user) to add any features you may desire out of neogrep.
+
+* Requirements
+neogrep runs on any system that is POSIX compliant or allows for POSIX compliancy. We build neogrep with the intent that it will be used on everything that is a UNIX, UNIX-like, or Linux. This means that it does not run on Windows. Sorry, Wintoddlers.

config.mk

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+# Customize for your system
+
+CC     = clang
+PREFIX = /usr/local/

main.c

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+/*
+ * main.c - Main entry point for neogrep
+ * $author:        Buckwheat of Neo-Sekai Club
+ * $creation-date: 2026/02/28
+ * $version:       1.0.0
+ *
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#define NEWLINE '\n'
+#define NULTERM '\0'
+
+/* Function Declarations */
+
+static int
+err_msg(const char*);
+
+static int
+substr_check(char*, const char*, int, int, int);
+
+/* Function Definitions */
+
+static int
+err_msg(const char* msg)
+{
+  printf("ERROR: %s\n", msg);
+  return 1;
+}
+
+static int
+substr_check(char* data, const char* substr, int start, int len, int line)
+{
+  int   newlen = len + 1;
+  char* str    = (char*)malloc(sizeof(char) * newlen);
+  
+  if (!str)
+    return -1;
+
+  for (int index = 0; index < newlen; index++)
+    if (index == len)
+      str[index] = NULTERM;
+    else
+      str[index] = data[index + start];
+
+  if (strstr(str, substr))
+    printf("\033[1;31mLine %d: \033[4;32m%s\033[0m", line, str);
+
+  free(str);
+        
+  return 0;
+}
+
+int
+main(int argc, char** argv)
+{
+  if (argc > 3 || argc < 3)
+    return err_msg("Insufficient arg count\nUsage: ng <file> <string>");
+
+  struct stat file_info;
+  char*       file_map;
+
+  int         char_count = 0;
+  int         file_size  = 0;
+  int         line_count = 0;
+  int         src_file   = -1;
+  const char* substr     = argv[2];
+  const char* src_name   = argv[1];
+
+  src_file = open(src_name, O_RDONLY, 0);
+  if (src_file == -1)
+    return err_msg("Could not open input file");
+
+  fstat(src_file, &file_info);
+  file_size = file_info.st_size;
+
+  file_map = (char*)mmap(NULL, file_size, PROT_READ,
+      MAP_SHARED, src_file, 0);
+  
+  if (file_map == MAP_FAILED)
+  {
+    close(src_file);
+    return err_msg("mmap failed");
+  }
+
+  for (int index = 0; index < file_size; index++)
+  {
+    char current = file_map[index];
+
+    if (current == NEWLINE)
+    {
+      line_count++;
+      char_count = substr_check(file_map, substr,
+          index - char_count, char_count + 1, line_count);
+    }
+    
+    else
+      char_count++;
+
+    if (char_count == -1)
+      return err_msg("Failed to malloc");
+  }
+
+  if (munmap(file_map, file_size) == -1)
+    return err_msg("munmap failed");
+        
+  return 0;
+}