2 files changed, 50 insertions, 15 deletions

diff --git a/dynarr.h b/dynarr.h
index 6feea5a..9fe8701 100644
--- a/dynarr.h
+++ b/dynarr.h
@@ -4,7 +4,6 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
-#include <err.h>
 
 #include "stdwrm.h"
 
@@ -13,28 +12,26 @@ typedef struct { size_t count, capacity; } DynArrHeader;
 #define DYNARR(type) type *
 #define DA_HEADER(da) ((DynArrHeader*)(da) - 1)
 
-#define DA_DEFAULT_INIT_SIZE 16
-
-#define DA_INIT_SIZE(da, sz) do {\
-	char *stdwrm__da_init_ptr = ((char*)malloc(sizeof(DynArrHeader) + sz * sizeof(*da)));\
-	if (!stdwrm__da_init_ptr) err(1, "dynamic array allocation failed");\
-	da = (void *)(stdwrm__da_init_ptr + sizeof(DynArrHeader));\
-	*DA_HEADER(da) = (DynArrHeader) { 0, sz };\
+#define DA_INIT_CAP 16
+#define DA_INIT_SZ(da, cap) do {\
+	char *da_init_ptr = ((char*)malloc(sizeof(DynArrHeader) + cap * sizeof(*da)));\
+	if (!da_init_ptr) { fprintf(stderr, "dynamic array allocation failed\n"); abort(); }\
+	da = (void *)(da_init_ptr + sizeof(DynArrHeader));\
+	*DA_HEADER(da) = (DynArrHeader) { 0, cap };\
 } while(0)
 
-#define DA_INIT(da) DA_INIT_SIZE(da, DA_DEFAULT_INIT_SIZE)
+#define DA_INIT(da) DA_INIT_SZ(da, DA_INIT_CAP)
 
 #define DA_FREE(da)\
 	free(DA_HEADER(da))
 
 #define DA_LEN(da) (DA_HEADER(da)->count)
 #define DA_FIT(da, count) do {\
-	size_t stdwrm__da_fit_count = count;\
-	if (stdwrm__da_fit_count >= DA_HEADER(da)->capacity) {\
-		while (stdwrm__da_fit_count >= DA_HEADER(da)->capacity) DA_HEADER(da)->capacity <<= 1;\
-		char *stdwrm__da_fit_ptr = realloc(DA_HEADER(da), sizeof(DynArrHeader) + DA_HEADER(da)->capacity * sizeof(*da));\
-		if (!stdwrm__da_fit_ptr) err(1, "dynamic array reallocation failed");\
-		(da) = (void *)(stdwrm__da_fit_ptr + sizeof(DynArrHeader));\
+	if (count >= DA_HEADER(da)->capacity) {\
+		while (count >= DA_HEADER(da)->capacity) DA_HEADER(da)->capacity <<= 1;\
+		char *da_fit_ptr = realloc(DA_HEADER(da), sizeof(DynArrHeader) + DA_HEADER(da)->capacity * sizeof(*da));\
+		if (!da_fit_ptr) { fprintf(stderr, "dynamic array reallocation failed\n"); abort(); }\
+		(da) = (void *)(da_fit_ptr + sizeof(DynArrHeader));\
 	}\
 } while(0)
 
diff --git a/str.h b/str.h
index 47ff676..bafec19 100644
--- a/str.h
+++ b/str.h
@@ -14,15 +14,21 @@ typedef struct {
 } strv_t;
 
 #define strv(s) (strv_t) { s, strlen(s) }
+#define strvs(s) (strv_t) { s, slen(s) }
 
 string snew(void);
 size_t slen(const string);
 void scats(string *, strv_t);
 void scatc(string *, char);
 void sfree(string);
+void sreplace(string *str, size_t i, size_t n, strv_t with);
+string sfmt(const char *fmt, ...);
+string sdup(const char *);
 
 #ifdef STDWRM_IMPL_STR
 
+#include <stdarg.h>
+
 string snew(void) {
 	string s;
 	DA_INIT(s);
@@ -54,5 +60,37 @@ void sfree(string s) {
 	DA_FREE(s);
 }
 
+string sfmt(const char *fmt, ...) {
+	va_list count, print;
+	string s;
+	FILE *f = fopen("/dev/null", "w/o");
+	va_start(print, fmt);
+	va_copy(count, print);
+	size_t n = vfprintf(f, fmt, count) + 1;
+	DA_INIT_SZ(s, n);
+	vsprintf(s, fmt, print);
+	va_end(print);
+	fclose(f);
+	return s;
+}
+
+string sdup(const char *s) {
+	string d;
+	size_t n = strlen(s) + 1;
+	DA_INIT_SZ(d, n);
+	memcpy(d, s, n);
+	return d;
+}
+
+void sreplace(string *str, size_t i, size_t n, strv_t with) {
+	string s = *str;
+	size_t new_n = DA_LEN(s) + with.n - n;
+	DA_FIT(s, new_n);
+	memmove(&s[i + with.n], &s[i + n], slen(s) - (i + n));
+	memcpy(&s[i], with.s, with.n);
+	s[new_n - 1] = 0;
+	DA_LEN(s) = new_n;
+}
+
 #endif
 #endif