-#ifndef VG_STRING_H
-#define VG_STRING_H
+#pragma once
+#include "vg_platform.h"
/* string builder with optional dynamic memory or static buffer. */
-#include "vg_stdint.h"
-
typedef struct vg_str vg_str;
typedef struct vg_str_dynamic vg_str_dynamic;
-struct vg_str{
+struct vg_str
+{
char *buffer;
i32 i, /* -1: error condition. otherwise, current cursor position */
len; /* -1: dynamically allocated. otherwise, buffer length */
};
-struct vg_str_dynamic {
+struct vg_str_dynamic
+{
i32 len;
};
/*
* Returns the current storage size of the string
*/
-static i32 vg_str_storage( vg_str *str ){
- if( str->len == -1 ){
- if( str->buffer ){
- vg_str_dynamic *arr = (vg_str_dynamic *)str->buffer;
- return (arr-1)->len;
- }
- else return 0;
- }
- else return str->len;
-}
+i32 vg_str_storage( vg_str *str );
/*
* Reset string. If len is -1 (dynamically allocated), buffer must be either
* NULL or be acquired from malloc or realloc
*/
-static void vg_strnull( vg_str *str, char *buffer, i32 len ){
- str->buffer = buffer;
- if( buffer )
- str->buffer[0] = '\0';
-
- str->i = 0;
- str->len = len;
-
- assert(len);
-}
-
-static void vg_strfree( vg_str *str ){
- if( str->len == -1 ){
- if( str->buffer ){
- vg_str_dynamic *arr = (vg_str_dynamic *)str->buffer;
- free( arr-1 );
-
- str->buffer = NULL;
- str->i = 0;
- }
- }
-}
-
-/*
- * Double the size of the dynamically allocated string. If unallocated, alloc of
- * 16 bytes minimum.
- */
-static i32 vg_str_dynamic_grow( vg_str *str ){
- if( str->buffer ){
- vg_str_dynamic *hdr = ((vg_str_dynamic *)str->buffer) - 1;
- i32 total = (hdr->len + sizeof(vg_str_dynamic)) * 2;
- hdr = realloc( hdr, total );
- hdr->len = total - sizeof(vg_str_dynamic);
- str->buffer = (char *)(hdr+1);
- return hdr->len;
- }
- else {
- vg_str_dynamic *hdr = malloc(16);
- hdr->len = 16-sizeof(vg_str_dynamic);
- str->buffer = (char *)(hdr+1);
- str->buffer[0] = '\0';
- return hdr->len;
- }
-}
+void vg_strnull( vg_str *str, char *buffer, i32 len );
+void vg_strfree( vg_str *str );
/*
* Append null terminated string to vg_str
*/
-static void vg_strcat( vg_str *str, const char *append ){
- if( !append || (str->i == -1) ) return;
-
- i32 max = vg_str_storage( str ),
- i = 0;
-
-append:
- if( str->i == max ){
- if( str->len == -1 )
- max = vg_str_dynamic_grow( str );
- else{
- str->i = -1;
- str->buffer[ max-1 ] = '\0';
- return;
- }
- }
-
- char c = append[ i ++ ];
- str->buffer[ str->i ] = c;
-
- if( c == '\0' )
- return;
-
- str->i ++;
- goto append;
-}
+void vg_strcat( vg_str *str, const char *append );
/*
* Append character to vg_str
*/
-static void vg_strcatch( vg_str *str, char c ){
- vg_strcat( str, (char[]){ c, '\0' } );
-}
-
-/*
- * FIXME: Negative numbers
- */
-static void vg_strcati32( vg_str *str, i32 value ){
- if( value ){
- char temp[32];
- int i=0;
- while( value && (i<31) ){
- temp[ i ++ ] = '0' + (value % 10);
- value /= 10;
- }
-
- char reverse[32];
- for( int j=0; j<i; j ++ )
- reverse[j] = temp[ i-1-j ];
- reverse[i] = '\0';
-
- vg_strcat( str, reverse );
- }
- else
- vg_strcat( str, "0" );
-}
-
-static void vg_strcati32r( vg_str *str, i32 value, i32 n, char alt ){
- char temp[32];
- i32 i=0;
- while( value ){
- if( i>=n )
- break;
-
- temp[ n-1 - (i ++) ] = '0' + (value % 10);
- value /= 10;
- }
-
- for( ;i<n; i ++ )
- temp[ n-1 - i ] = alt;
-
- temp[n]='\0';
- vg_strcat( str, temp );
-}
-
+void vg_strcatch( vg_str *str, char c );
+void vg_strcati32( vg_str *str, i32 value );
+void vg_strcati32r( vg_str *str, i32 value, i32 n, char alt );
/*
* Returns 1 if string did not overflow while building
*/
-static int vg_strgood( vg_str *str ){
- if( str->i == -1 ) return 0;
- else return 1;
-}
+int vg_strgood( vg_str *str );
/*
* Returns pointer to last instance of character
*/
-static char *vg_strch( vg_str *str, char c ){
- char *ptr = NULL;
- for( i32 i=0; i<str->i; i++ ){
- if( str->buffer[i] == c )
- ptr = str->buffer+i;
- }
+char *vg_strch( vg_str *str, char c );
+
+enum strncpy_behaviour
+{
+ k_strncpy_always_add_null = 0,
+ k_strncpy_allow_cutoff = 1,
+ k_strncpy_overflow_fatal = 2
+};
- return ptr;
-}
+u32 vg_strncpy( const char *src, char *dst, u32 len,
+ enum strncpy_behaviour behaviour );
+u32 vg_strdjb2( const char *str );
+int vg_strdjb2_eq( const char *s1, u32 h1, const char *s2, u32 h2 );
-#endif /* VG_STRING_H */
+#define VG_STRDJB2_EQ( CS1, S2, H2 ) \
+ vg_strdjb2_eq( CS1, vg_strdjb2(CS1), S2, H2 )
projects / vg.git / blobdiff