Merge branch 'main' of github.com:roodletoof/cig

cig.h

@@ -333,7 +333,7 @@ typedef struct string_builder {
 } string_builder_t;
 
 string_builder_t sb_create(allocator_t builder_allocator);
-// assumes the provided string will live until sb_build is called.
+// assumes the provided string will live until sb_build_and_clear is called.
 void sb_add_string(string_builder_t *this, const char *string);
 void sb_add_i64(string_builder_t *this, int64_t i64);
 void sb_add_i32(string_builder_t *this, int32_t i32);
@@ -344,8 +344,12 @@ void sb_add_u32(string_builder_t *this, uint32_t u32);
 void sb_add_u16(string_builder_t *this, uint16_t u16);
 void sb_add_u8(string_builder_t *this, uint8_t u8);
 void sb_add_substring(string_builder_t *this, const char *string, size_t substring_length);
-const char *sb_build(string_builder_t *this, allocator_t output_allocator);
-void sb_fprint(string_builder_t *this, FILE *dest);
+const char *sb_build_and_clear(string_builder_t *this, allocator_t output_allocator);
+void sb_fprint_and_clear(string_builder_t *this, FILE *dest);
+
+// file_io /////////////////////////////////////////////////////////////////////
+char *read_entire_file(const char *path, allocator_t allocator);
+char **read_all_file_lines(const char *path, allocator_t allocator);
 
 #ifdef CIG_IMPL
 
@@ -377,6 +381,7 @@ void allocator_reset(allocator_t this) {
 #include "cli.c"
 #include "scanner.c"
 #include "string_builder.c"
+#include "file_io.c"
 
 #endif // CIG_IMPL
 

file_io.c

@@ -0,0 +1,37 @@
+#include "cig.h"
+#include <assert.h>
+
+char *read_entire_file(const char *path, allocator_t allocator) {
+	FILE *fp = fopen(path, "rb");
+	assert(fp != NULL);
+	fseek(fp, 0, SEEK_END);
+	long size = ftell(fp);
+	rewind(fp);
+	char *buf = allocator_alloc(allocator, size+1);
+	assert(buf != NULL);
+	size_t read = fread(buf, 1, size, fp);
+	assert(read == (size_t)size);
+	fclose(fp);
+	buf[size] = '\0';
+	return buf;
+}
+
+// Returns dynamic array, of fixed char strings.
+char **read_all_file_lines(const char *path, allocator_t allocator) {
+	char *contents = read_entire_file(path, allocator);
+	char **lines = make_arr(allocator, char*);
+	arr_append(lines, contents);
+	bool just_split = false;
+	for (char *c = contents; (*c)!='\0'; c++) {
+		if ((*c) == '\n') {
+			*c = '\0';
+			just_split = true;
+			continue;
+		}
+		if (just_split) {
+			just_split = false;
+			arr_append(lines, c);
+		}
+	}
+	return lines;
+}

string_builder.c

@@ -91,7 +91,7 @@ void sb_add_substring(string_builder_t *this, const char *string, size_t substri
 	sb_add_string(this, buffer);
 }
 
-const char *sb_build(
+const char *sb_build_and_clear(
 	string_builder_t *this,
 	allocator_t output_allocator
 ) {
@@ -123,7 +123,7 @@ const char *sb_build(
 	return buffer;
 }
 
-void sb_fprint(string_builder_t *this, FILE *dest) {
+void sb_fprint_and_clear(string_builder_t *this, FILE *dest) {
 	for (
 		string_builder_node_t *node = this->head;
 		node != NULL;
@@ -131,4 +131,6 @@ void sb_fprint(string_builder_t *this, FILE *dest) {
 	) {
 		fprintf(dest, "%s", node->string);
 	}
+	this->head = NULL;
+	this->tail = NULL;
 }