l4arg: 初次完成將字串解為 argv 的部份，但尚未測試

1 files changed, 91 insertions, 0 deletions

diff --git a/l4arg/toargv.c b/l4arg/toargv.c
new file mode 100644
index 0000000..35a9ae8
--- /dev/null
+++ b/l4arg/toargv.c
@@ -0,0 +1,91 @@
+#include <string.h>
+#include <l4arg.h>
+#include <l4darr.h>
+
+/* 基本上優先順序是 escape -> quoting -> delimiter */
+
+#define abort_l4arg_toargv \
+	do{ \
+		l4da_free(parr); \
+		l4da_free(tmpstr); \
+		return NULL; \
+	}while(0)
+
+char** l4arg_toargv(const char* str, 
+		const char* delim, const char* quoting, const char* esc){
+	int i;
+	char escaped = 0, quoted = 0, delimed = 0;
+	L4DA* parr;
+	L4DA* tmpstr;
+	char* addstr;
+	char** rval;
+	parr = l4da_create(sizeof(char*), 0);
+	if(parr == NULL){
+		return NULL;
+	}
+	tmpstr = l4da_create(sizeof(char), 0);
+	if(tmpstr == NULL){
+		l4da_free(parr);
+		return NULL;
+	}
+	for(i=0; str[i]!='\0'; i++){
+		if(escaped){
+			if(l4da_pushback(tmpstr, &str[i]) < 0){
+				abort_l4arg_toargv;
+			}
+			escaped = 0;
+			delimed = 0;
+			continue;
+		}
+		if(quoted){
+			if(strchr(quoting, str[i]) != NULL){
+				quoted = 0;
+				continue;
+			}
+			if(l4da_pushback(tmpstr, &str[i]) < 0){
+				abort_l4arg_toargv;
+			}
+			delimed = 0;
+		}
+		if(strchr(esc, str[i]) != NULL){
+			escaped = 1;
+			continue;
+		}
+		if(strchr(quoting, str[i]) != NULL){
+			quoted = 1;
+			continue;
+		}
+		if(strchr(delim, str[i]) != NULL){
+			if(l4da_pushback(tmpstr, '\0') < 0){
+				abort_l4arg_toargv;
+			}
+			addstr = (char*)l4da_drop_struct(tmpstr);
+			if(l4da_pushback(parr, &addstr) < 0){
+				l4da_free(parr);
+				return NULL;
+			}
+			tmpstr = l4da_create(sizeof(char), 0);
+			if(tmpstr == NULL){
+				l4da_free(parr);
+				return NULL;
+			}
+			delimed = 1;
+		}
+		if(l4da_pushback(tmpstr, &str[i]) < 0){
+			abort_l4arg_toargv;
+		}
+		delimed = 0;
+	}
+	if(!delimed){
+		if(l4da_pushback(tmpstr, '\0') < 0){
+			abort_l4arg_toargv;
+		}
+		addstr = (char*)l4da_drop_struct(tmpstr);
+		if(l4da_pushback(parr, &addstr) < 0){
+			l4da_free(parr);
+			return NULL;
+		}
+	}
+	rval = (char**)l4da_drop_struct(parr);
+	return rval;
+}