CE edit Introduce viewer mode

ce/edit.c

@@ -130,7 +130,8 @@ static size_t count_digits(size_t n) {
   return count;
 }
 
-void edit_start(const char* volume, const char* file_path, const char* text, size_t text_len) {
+void edit_start(const char* volume, const char* file_path, const char* text, size_t text_len,
+                bool readonly) {
   editor.volume = volume;
   editor.path = file_path;
 
@@ -244,7 +245,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
 
     switch (ch) {
     case '\b':
-      if (editor.mode == EDIT_MODE_NORMAL) {
+      if (editor.mode == EDIT_MODE_NORMAL && !readonly) {
         if (editor.cursor.col > 0) {
           in_gb_move(&editor.current_line->gb, editor.cursor.col);
           editor.cursor.col--;
@@ -271,7 +272,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
       }
       break;
     case '\t':
-      if (editor.mode == EDIT_MODE_NORMAL) {
+      if (editor.mode == EDIT_MODE_NORMAL && !readonly) {
         in_gb_move(&editor.current_line->gb, editor.cursor.col);
         for (size_t i = 0; i < sizeof(TAB_INSERT) - 1; i++)
           in_gb_insert(&wrealloc, NULL, &editor.current_line->gb, TAB_INSERT[i]);
@@ -280,7 +281,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
       }
       break;
     case '\n': {
-      if (editor.mode == EDIT_MODE_NORMAL) {
+      if (editor.mode == EDIT_MODE_NORMAL && !readonly) {
         in_gb_move(&editor.current_line->gb, editor.cursor.col);
 
         struct edit_line* new_line = malloc(sizeof(*new_line));
@@ -311,7 +312,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
         if (strcmp(editor.cmdbuf.buffer, "q") == 0) {
           edit_run = false;
           editor.mode = EDIT_MODE_NORMAL;
-        } else if (strcmp(editor.cmdbuf.buffer, "w") == 0) {
+        } else if (strcmp(editor.cmdbuf.buffer, "w") == 0 && !readonly) {
           struct filewriter fw;
           if (!(filewriter_init(&fw, editor.volume, editor.path, FW_CREATE_FILE) < 0)) {
             struct list_node_link *line_link, *tmp_line_link;
@@ -335,7 +336,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
       }
     } break;
     case KB_DELETE:
-      if (editor.mode == EDIT_MODE_NORMAL) {
+      if (editor.mode == EDIT_MODE_NORMAL && !readonly) {
         size_t len = in_gb_length(&editor.current_line->gb);
 
         if (editor.cursor.col < len) {
@@ -409,7 +410,7 @@ void edit_start(const char* volume, const char* file_path, const char* text, siz
             editor.cmdbuf.buffer[editor.cmdbuf.len++] = ch;
             editor.cmdbuf.buffer[editor.cmdbuf.len] = '\0';
           }
-        } else if (editor.mode == EDIT_MODE_NORMAL) {
+        } else if (editor.mode == EDIT_MODE_NORMAL && !readonly) {
           in_gb_move(&editor.current_line->gb, editor.cursor.col);
           in_gb_insert(&wrealloc, NULL, &editor.current_line->gb, ch);
           editor.cursor.col++;

ce/edit.h

@@ -1,8 +1,10 @@
 #ifndef _EDIT_H
 #define _EDIT_H
 
+#include <stdbool.h>
 #include <stddef.h>
 
-void edit_start(const char* volume, const char* path, const char* text, size_t text_len);
+void edit_start(const char* volume, const char* path, const char* text, size_t text_len,
+                bool readonly);
 
 #endif // _EDIT_H

ce/interp.c

@@ -385,7 +385,49 @@ static void edit(struct context* context, const char* path_string) {
 
   volume_close();
 
-  edit_start(volume, path, str, desc.size);
+  edit_start(volume, path, str, desc.size, false);
+}
+
+static void view(struct context* context, const char* path_string) {
+  struct desc desc;
+  char volume[VOLUME_MAX];
+  const char* path;
+  int ret;
+
+  if (!path_parse(path_string, volume, &path)) {
+    cprintf(context, "ERROR bad path '%s'\n", path_string);
+    return;
+  }
+
+  if ((ret = volume_open(volume)) < 0) {
+    cprintf(context, "ERROR could not open volume '%s': %s\n", volume, str_status[-ret]);
+    return;
+  }
+
+  if ((ret = describe(path, &desc)) < 0) {
+    cprintf(context, "ERROR could not describe '%s': %s\n", path, str_status[-ret]);
+    volume_close();
+    return;
+  }
+
+  char* str = malloc(desc.size + 1);
+
+  if (str == NULL) {
+    volume_close();
+    return;
+  }
+
+  memset(str, 0, desc.size);
+
+  if ((ret = read_file(path, 0, (uint8_t*)str, desc.size)) < 0) {
+    free(str);
+    volume_close();
+    return;
+  }
+
+  volume_close();
+
+  edit_start(volume, path, str, desc.size, true);
 }
 
 static void quit1(struct context* context) {
@@ -407,6 +449,7 @@ static void help(struct context* context) {
   cprintf(context, "mkdir        <directory path>\n");
   cprintf(context, "rm           <path>\n");
   cprintf(context, "edit         <path>\n");
+  cprintf(context, "view         <path>\n");
   cprintf(context, "terminfo\n");
   cprintf(context, "cls\n");
   cprintf(context, "procinfo\n");
@@ -476,6 +519,11 @@ static void execute_cmd(struct ast_cmd* cmd, struct context* context, bool run_b
       edit(context, cmd->args[0]);
     else
       cprintf(context, "ERROR No file path provided\n");
+  } else if (strcmp(cmd->name, "view") == 0) {
+    if (cmd->arg_count == 1)
+      view(context, cmd->args[0]);
+    else
+      cprintf(context, "ERROR No file path provided\n");
   } else if (strcmp(cmd->name, "terminfo") == 0) {
     terminfo(context);
   } else if (strcmp(cmd->name, "cls") == 0) {