first commit

Makefile

@@ -0,0 +1,16 @@
+.PHONY: default
+
+default: main
+
+install: main
+	cp lipsum /usr/local/bin/
+
+main: lipsum.c
+	gcc -O3 lipsum.c -o lipsum
+
+static: lipsum.c
+	gcc -O3 -static lipsum.c -o lipsum
+
+clean: lipsum
+	rm lipsum
+

lipsum.c

@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdbool.h>
+
+/* Read a line from a file into a newly created buffer */
+int readline(FILE* in, char **out) {
+    int size_of_buffer = 20;
+    char *buffer = calloc(size_of_buffer, sizeof(char));
+    char character;
+    int count = 0;
+
+    while (true) {
+        character = fgetc(in);        
+        if (character == EOF) {
+            buffer[count] = '\0';
+            *out = buffer;
+            return EOF;
+        }
+        if (character == '\n') {
+            buffer[count] = '\0';
+            *out = buffer;
+            return 0;
+        } else {
+            if (count == (size_of_buffer - 3)) {
+                buffer = reallocarray(buffer, (size_of_buffer *= 2),  
+                        sizeof(char));
+
+                if (!buffer) {
+                    return 1;
+                }
+            }
+
+            buffer[count] = character;
+            count++;
+        }
+    }
+}
+
+char **read_word_file(char *file, int *num_ret) {
+    FILE *words = fopen(file, "r");
+    int listlen = 10;
+    char **wordlist = calloc(listlen, sizeof(char *));
+
+    int no;
+    for (no = 0; true; no++) {
+        if (no == listlen) {
+            listlen += 1;
+            wordlist = reallocarray(wordlist, listlen, sizeof(char*));
+            char *nextword;
+            int er = readline(words, &nextword);
+
+            if (er == EOF) {
+                break;
+            }
+
+            wordlist[no] = nextword;
+        }
+    }
+
+    *num_ret = no;
+    return wordlist;
+}
+
+int main (int argc, char **argv) {
+    if (argc > 2) {
+        fprintf(stderr, "Usage: lipsum <num words>\n");
+        return 1;
+    }
+    int num;
+    if (argc == 1) {
+        num = 50;
+    } else {
+        num = atoi(argv[1]);
+        if (num <= 0) {
+        fprintf(stderr, "Usage: lipsum <num words>\n");
+        return 1;
+        }
+    }
+
+    unsigned int rand_seed = time(NULL);
+
+    int len;
+    char **wordlist = read_word_file("/usr/share/dict/words", &len);
+
+    for (int i = 0; i < num; i++) {
+        int index = rand_r(&rand_seed) % len;
+        printf("%s ", wordlist[index]);
+    }
+    printf("\n");
+    
+}