From 5724c8ffa8c54dcb00d0e6ed251bc97dfd5855a1 Mon Sep 17 00:00:00 2001
From: kamkow1 <ikamileq@gmail.com>
Date: Sun, 1 Jun 2025 23:34:31 +0200
Subject: [PATCH] Add sb_read_file()

---
 example/sb.c | 17 +++++++++++++++++
 gebs.c       | 10 +++++++---
 gebs.h       | 36 +++++++++++++++++++++++++++++++++++-
 3 files changed, 59 insertions(+), 4 deletions(-)
 create mode 100644 example/sb.c

diff --git a/example/sb.c b/example/sb.c
new file mode 100644
index 0000000..cbc81ce
--- /dev/null
+++ b/example/sb.c
@@ -0,0 +1,17 @@
+#define GEBS_NO_PREFIX
+#define GEBS_IMPLEMENTATION
+#include "../gebs.h"
+
+int main(int argc, char ** argv)
+{
+    String_Builder sb_c;
+    if (!sb_read_file(&sb_c, "sb.c")) {
+        LOGE("Could not read sb.c. sb.c is in example/\n");
+        return 1;
+    }
+    sb_finish(&sb_c);
+
+    printf("%s\n", sb_c.items);
+
+    return 0;
+}
diff --git a/gebs.c b/gebs.c
index 057bd49..dafb5ed 100644
--- a/gebs.c
+++ b/gebs.c
@@ -11,15 +11,19 @@ int main(int argc, char ** argv)
     }
 
     RULE("build/self_rebuild", "example/self_rebuild.c", "gebs.h") {
-        CMD("gcc", "-ggdb", "-o", "build/self_rebuild", "example/self_rebuild.c");
+        CMD("cc", "-ggdb", "-o", "build/self_rebuild", "example/self_rebuild.c");
     }
 
     RULE("build/arena", "example/arena.c", "gebs.h") {
-        CMD("gcc", "-ggdb", "-o", "build/arena", "example/arena.c");
+        CMD("cc", "-ggdb", "-o", "build/arena", "example/arena.c");
     }
 
     RULE("build/commands", "example/commands.c", "gebs.h") {
-        CMD("gcc", "-ggdb", "-o", "build/commands", "example/commands.c");
+        CMD("cc", "-ggdb", "-o", "build/commands", "example/commands.c");
+    }
+
+    RULE("build/sb", "example/sb.c", "gebs.h") {
+        CMD("cc", "-ggdb", "-o", "build/sb", "example/sb.c");
     }
 
     return 0;
diff --git a/gebs.h b/gebs.h
index 56bbc8d..3ba1ccb 100644
--- a/gebs.h
+++ b/gebs.h
@@ -88,6 +88,7 @@ int main(int argc, char ** argv)
 #include <inttypes.h>
 #include <stdarg.h>
 #include <string.h>
+#include <limits.h>
 
 #include <unistd.h>
 #include <sys/stat.h>
@@ -283,6 +284,28 @@ typedef struct {
 #define gebs_sb_append_nstr(sb, nstr) \
     gebs_sb_append_nstr_alloc(&gebs_default_allocator, (sb), (nstr))
 
+#define gebs_sb_read_file_alloc(alloc, sb, path) \
+({ \
+    bool __ret = false; \
+    FILE *__f = fopen((path), "r"); \
+    if (__f != nil) { \
+        __ret = true; \
+        fseek(__f, 0L, SEEK_END); \
+        size_t __size = ftell(__f); \
+        rewind(__f); \
+        char *__buf = gebs_malloc((alloc), __size); \
+        fread(__buf, __size, 1, __f); \
+        fclose(__f); \
+        for (size_t __i = 0; __i < __size; __i++) { \
+            gebs_sb_append_char_alloc((alloc), (sb), __buf[__i]); \
+        } \
+    } \
+    __ret; \
+})
+
+#define gebs_sb_read_file(sb, path) \
+    gebs_sb_read_file_alloc(&default_allocator, (sb), (path))
+
 // ----------------------------------------------------------------------------
 // Filesystem operations
 // ----------------------------------------------------------------------------
@@ -382,8 +405,9 @@ void gebs_rebuild_self1_alloc(Gebs_Allocator *alloc, int argc, char ** argv,
 
 extern Gebs_Arena gebs_scratch_arena;
 
-char *gebs_fmt(const char *fmt, ...);
 void gebs_scratch_arena_reset(void);
+char *gebs_fmt(const char *fmt, ...);
+char *gebs_cwd(void);
 
 #ifdef GEBS_IMPLEMENTATION
 
@@ -649,6 +673,15 @@ void gebs_scratch_arena_reset(void)
     gebs_arena_reset(&gebs_scratch_arena);
 }
 
+char *gebs_cwd(void)
+{
+    char *cwd = gebs_malloc(&gebs_scratch_arena, PATH_MAX);
+    if (getcwd(cwd, PATH_MAX) == nil) {
+        return nil;
+    }
+    return cwd;
+}
+
 // ----------------------------------------------------------------------------
 // Filesystem operations
 // ----------------------------------------------------------------------------
@@ -774,6 +807,7 @@ void gebs_rebuild_self1_alloc(Gebs_Allocator *alloc, int argc, char ** argv,
 #define sb_free                     gebs_sb_free
 #define sb_finish                   gebs_sb_finish
 #define sb_append_nstr              gebs_sb_append_nstr
+#define sb_read_file                gebs_sb_read_file
 
 #define rename1                     gebs_rename
 #define remove1                     gebs_remove