add env and make smash be able to parse files with comments

1 files changed, 45 insertions, 10 deletions

diff --git a/lib/env/env.c b/lib/env/env.c
index d52c3f3..7ceaa15 100644
--- a/lib/env/env.c
+++ b/lib/env/env.c
@@ -1,16 +1,19 @@
 #include "env.h"
 
 #include "../malloc/malloc.h"
+#include "../cstr/cstr.h"
 
-const char **envp;
+char **envp;
+u64 envsize = 0;
+#define ENVSIZEINC 16
 
-const char **__getenvpair(const char *key);
+char **__getenvpair(const char *key);
 u8 __match_env_key(const char *p, const char *key);
 
 
 const char *getenv(const char *key)
 {
-	const char **p = __getenvpair(key);
+	char **p = __getenvpair(key);
 	const char *value;
 
 	if (p == 0)
@@ -25,14 +28,44 @@ const char *getenv(const char *key)
 
 void setenv(const char *key, const char *value)
 {
-	const char **p = __getenvpair(key);
-	*p = value;
+	char **p = __getenvpair(key);
+
+	if (p == 0) {
+		p = envp;
+
+		while (*p) ++p;
+
+		if (p - envp >= envsize) {
+			if (envsize == 0) {
+				for (; *(envp + envsize); ++envsize);
+				char **nenvp = malloc(sizeof(char *) * (envsize + ENVSIZEINC));
+				p = nenvp;
+				while (p < nenvp + envsize + ENVSIZEINC) *(p++) = 0;
+				p = nenvp;
+				while (*envp) *(p++) = *(envp++);
+				envp = nenvp;
+			} else {
+				envp = realloc(envp, envsize + ENVSIZEINC);
+			}
+
+			p = envp + envsize;
+			envsize += ENVSIZEINC;
+		}
+	}
+
+	*p = malloc((cstr_length(key) + cstr_length(key)) + 2);
+	char *i = *p;
+
+	while (*key) *(i++) = *(key++);
+	*(i++) = '=';
+	while (*value) *(i++) = *(value++);
+	*i = 0;
 }
 
 
-const char **__getenvpair(const char *key)
+char **__getenvpair(const char *key)
 {
-	const char **p = envp;
+	char **p = envp;
 
 	while (*p) {
 		if (__match_env_key(*p, key)) {
@@ -48,7 +81,7 @@ const char **__getenvpair(const char *key)
 
 const char **getenvp()
 {
-	return envp;
+	return (const char**)envp;
 }
 
 
@@ -69,7 +102,7 @@ u8 __match_env_key(const char *p, const char *key)
 	return 1;
 }
 
-void init_env(int argc, const char **argv, const char **envp__)
+void init_env(int argc, const char **argv, char **envp__)
 {
 	envp = envp__;
 }
@@ -80,7 +113,9 @@ void init_env(int argc, const char **argv, const char **envp__)
 
 int main(int argc, const char **argv)
 {
-	wstdf("HOME: %s\n", getenv("HOSTNAME"));
+	wstdf("TEST: %s\n", getenv("TEST"));
+	setenv("TEST", "Hello, World!");
+	wstdf("TEST: %s\n", getenv("TEST"));
 }
 
 #endif