add dump output customization

README.md

@@ -1,6 +1,6 @@
 # cnotes
 
-A simple command-line note-taking system written in strict C89/ANSI C for maximum portability.
+A simple command-line logging and note-taking system written in strict C89/ANSI C for maximum portability.
 
 ## Overview
 
@@ -59,10 +59,11 @@ Options:
 
 ### cndump
 
-Display all notes in a formatted table.
+Display all notes in a formatted table. Output width adapts to terminal size automatically.
 
 ```bash
-cndump              # display all notes
+cndump              # display all notes (boxed table)
+cndump -s           # simple output (no box borders)
 cndump -d           # sort by date (newest first)
 cndump -c           # sort by category
 cndump -r           # reverse sort order
@@ -75,6 +76,7 @@ Options:
 - `-c, --category` - Sort by category
 - `-r, --reverse` - Reverse sort order
 - `-a, --archive` - Show archived entries instead of active
+- `-s, --simple` - Simple output without box borders
 
 ### cncount
 

src/cndump.c

@@ -8,10 +8,25 @@
 #include "platform.h"
 #include "config.h"
 
+/* Terminal width detection */
+#if defined(__MSDOS__) || defined(__DOS__)
+    /* DOS: assume 80 columns */
+#elif defined(_WIN32)
+    #include <windows.h>
+#else
+    #include <sys/ioctl.h>
+    #include <unistd.h>
+#endif
+
 #define MAX_LENGTH 500 /* Allow fgets to read up to this many characters */
 #define DATE_LENGTH 10 /* YYYY-MM-DD */
 #define TIME_LENGTH 5 /* HH:MM */
 #define TXTMSG_LENGTH 125 /* Max length of a text message */
+#define DEFAULT_TERM_WIDTH 80
+#define MIN_TEXT_WIDTH 20 /* Minimum width for free text column */
+
+/* Fixed column widths (date + time + category + separators) */
+#define FIXED_COLS (DATE_LENGTH + TIME_LENGTH + CATEGORY_LENGTH + 16)
 
 
 typedef enum {
@@ -23,6 +38,12 @@ typedef enum {
 /* Global variable to control sort order: 1 for ascending, -1 for descending */
 static int g_sort_order = -1; /* Default: descending (newest/Z-A first) */
 
+/* Output mode: 0 = boxed table, 1 = simple */
+static int g_simple_mode = 0;
+
+/* Dynamic text column width */
+static int g_text_width = TXTMSG_LENGTH;
+
 
 typedef struct {
     char date[DATE_LENGTH +1]; /* YYYY-MM-DD\0 */
@@ -47,6 +68,37 @@ static int compare_by_category(const void *a, const void *b) {
     return strcmp(entry_b->category, entry_a->category) * g_sort_order;
 }
 
+/* Get terminal width */
+static int get_terminal_width(void) {
+#if defined(__MSDOS__) || defined(__DOS__)
+    return 80; /* Standard DOS text mode */
+#elif defined(_WIN32)
+    CONSOLE_SCREEN_BUFFER_INFO csbi;
+    if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) {
+        return csbi.srWindow.Right - csbi.srWindow.Left + 1;
+    }
+    return DEFAULT_TERM_WIDTH;
+#else
+    struct winsize ws;
+    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col > 0) {
+        return ws.ws_col;
+    }
+    return DEFAULT_TERM_WIDTH;
+#endif
+}
+
+/* Calculate text column width based on terminal size */
+static int calc_text_width(int term_width) {
+    int available = term_width - FIXED_COLS;
+    if (available < MIN_TEXT_WIDTH) {
+        available = MIN_TEXT_WIDTH;
+    }
+    if (available > TXTMSG_LENGTH) {
+        available = TXTMSG_LENGTH;
+    }
+    return available;
+}
+
 void print_horizontal_line(char left, char middle, char right, char fill) {
     int i;
     printf("%c", left);
@@ -63,36 +115,74 @@ void print_horizontal_line(char left, char middle, char right, char fill) {
     for (i = 0; i < CATEGORY_LENGTH + 2; i++) printf("%c", fill);
     printf("%c", middle);
 
-    /* Free text column */
+    /* Free text column (dynamic width) */
-    for (i = 0; i < TXTMSG_LENGTH + 2; i++) printf("%c", fill);
+    for (i = 0; i < g_text_width + 2; i++) printf("%c", fill);
     printf("%c\n", right);
 }
 
-void print_header(int is_archive) {
+void print_simple_separator(void) {
-    /* Top border (double line) */
+    int i;
-    print_horizontal_line('+', '+', '+', '=');
+    int total_width = DATE_LENGTH + TIME_LENGTH + CATEGORY_LENGTH + g_text_width + 9;
+    for (i = 0; i < total_width; i++) printf("-");
+    printf("\n");
+}
 
-    /* Header row */
+void print_header(int is_archive) {
+    const char *text_label = is_archive ? "Free Text (ARCHIVED)" : "Free Text";
+
+    if (g_simple_mode) {
+        /* Simple mode: header row with separator line */
+        printf("%-*s  %-*s  %-*s  %s\n",
+               DATE_LENGTH, "Date",
+               TIME_LENGTH, "Time",
+               CATEGORY_LENGTH, "Category",
+               text_label);
+        print_simple_separator();
+    } else {
+        /* Boxed mode: full table borders */
+        print_horizontal_line('+', '+', '+', '=');
         printf("| %-*s | %-*s | %-*s | %-*s |\n",
                DATE_LENGTH, "Date",
                TIME_LENGTH, "Time",
                CATEGORY_LENGTH, "Category",
-           TXTMSG_LENGTH, is_archive ? "Free Text (ARCHIVED)" : "Free Text");
+               g_text_width, text_label);
-
-    /* Bottom border (double line) */
         print_horizontal_line('+', '+', '+', '=');
     }
+}
 
 void print_footer(void) {
+    if (!g_simple_mode) {
         print_horizontal_line('+', '+', '+', '-');
     }
+}
 
 void print_entry(const Entry *entry) {
+    char truncated_text[TXTMSG_LENGTH + 1];
+    int text_len;
+
+    /* Truncate text if needed */
+    text_len = (int)strlen(entry->text);
+    if (text_len > g_text_width) {
+        strncpy(truncated_text, entry->text, g_text_width - 3);
+        truncated_text[g_text_width - 3] = '\0';
+        strcat(truncated_text, "...");
+    } else {
+        strcpy(truncated_text, entry->text);
+    }
+
+    if (g_simple_mode) {
+        printf("%-*s  %-*s  %-*s  %s\n",
+               DATE_LENGTH, entry->date,
+               TIME_LENGTH, entry->time,
+               CATEGORY_LENGTH, entry->category,
+               truncated_text);
+    } else {
         printf("| %-*s | %-*s | %-*s | %-*s |\n",
                DATE_LENGTH, entry->date,
                TIME_LENGTH, entry->time,
                CATEGORY_LENGTH, entry->category,
-           TXTMSG_LENGTH, entry->text);
+               g_text_width, truncated_text);
+    }
 }
 
 
@@ -190,13 +280,14 @@ int get_cnotes_path(char *buffer, size_t bufsize, const char *filename) {
 }
 
 void print_usage(const char *prog_name) {
-    fprintf(stderr, "Usage: %s [-d|--date] [-c|--category] [-r|--reverse] [-a|--archive]\n", prog_name);
+    fprintf(stderr, "Usage: %s [-d|--date] [-c|--category] [-r|--reverse] [-a|--archive] [-s|--simple]\n", prog_name);
     fprintf(stderr, "\n");
     fprintf(stderr, "Options:\n");
     fprintf(stderr, "  -d, --date      Sort by date/time\n");
     fprintf(stderr, "  -c, --category  Sort by category\n");
     fprintf(stderr, "  -r, --reverse   Reverse sort order\n");
     fprintf(stderr, "  -a, --archive   Show archived entries instead of active\n");
+    fprintf(stderr, "  -s, --simple    Simple output (no box borders)\n");
 }
 
 int main(int argc, char *argv[]) {
@@ -243,6 +334,9 @@ int main(int argc, char *argv[]) {
         else if (strcmp(argv[i], "-a") == 0 || strcmp(argv[i], "--archive") == 0) {
             show_archive = 1;
         }
+        else if (strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "--simple") == 0) {
+            g_simple_mode = 1;
+        }
         else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
             print_usage(argv[0]);
             free(entries);
@@ -306,6 +400,9 @@ int main(int argc, char *argv[]) {
         qsort(entries, entry_count, sizeof(Entry), compare_by_category);
     }
 
+    /* Calculate dynamic text width based on terminal */
+    g_text_width = calc_text_width(get_terminal_width());
+
     /* Print the table */
     print_header(show_archive);
     for (i = 0; i < entry_count; i++) {

src/cnhelp.c

@@ -6,7 +6,7 @@
 #include <string.h>
 
 void print_overview(void) {
-    printf("cnotes - Command-line note-taking system\n");
+    printf("cnotes - Command-line logging / note-taking system\n");
     printf("\n");
     printf("Commands:\n");
     printf("  cnadd    Add a new note entry\n");
@@ -35,16 +35,20 @@ void print_cnadd(void) {
 void print_cndump(void) {
     printf("cndump - Display all notes in a formatted table\n");
     printf("\n");
-    printf("Usage: cndump [-d] [-c] [-r] [-a]\n");
+    printf("Usage: cndump [-d] [-c] [-r] [-a] [-s]\n");
     printf("\n");
     printf("Options:\n");
     printf("  -d, --date      Sort by date/time (newest first)\n");
     printf("  -c, --category  Sort by category\n");
     printf("  -r, --reverse   Reverse sort order\n");
     printf("  -a, --archive   Show archived entries\n");
+    printf("  -s, --simple    Simple output (no box borders)\n");
+    printf("\n");
+    printf("Output adapts to terminal width automatically.\n");
     printf("\n");
     printf("Examples:\n");
     printf("  cndump           Display all notes\n");
+    printf("  cndump -s        Simple format (no borders)\n");
     printf("  cndump -d        Sort by date\n");
     printf("  cndump -a        Show archived notes\n");
 }