#ifndef VG_PLATFORM_H
#define VG_PLATFORM_H
-#ifdef VG_RELEASE
- #define VG_STATIC static
-#else
- #define VG_STATIC
-#endif
-
//#include "vg.h"
#include "vg_stdint.h"
#define vg_list_size( A ) (sizeof(A)/sizeof(A[0]))
#define VG_MUST_USE_RESULT __attribute__((warn_unused_result))
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <math.h>
+#include <assert.h>
+#include <setjmp.h>
+#include <sys/time.h>
+#include <math.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
enum strncpy_behaviour{
k_strncpy_always_add_null = 0,
- k_strncpy_allow_cutoff = 1
+ k_strncpy_allow_cutoff = 1,
+ k_strncpy_overflow_fatal = 2
};
-VG_STATIC u32 vg_strncpy( const char *src, char *dst, u32 len,
+static void vg_fatal_error( const char *fmt, ... );
+static u32 vg_strncpy( const char *src, char *dst, u32 len,
enum strncpy_behaviour behaviour )
{
for( u32 i=0; i<len; i++ ){
if( !src[i] ) return i;
- if( (behaviour == k_strncpy_always_add_null) && (i == len-1) ){
- dst[i] = '\0';
- return i;
+ if( i == len-1 ){
+ if( behaviour == k_strncpy_always_add_null ){
+ dst[i] = '\0';
+ return i;
+ }
+ else if( behaviour == k_strncpy_overflow_fatal ){
+ vg_fatal_error( "Strncpy dest exceeded buffer length\n" );
+ }
}
}
}
typedef struct vg_str vg_str;
+typedef struct vg_str_dynamic vg_str_dynamic;
+
struct vg_str{
char *buffer;
- u32 i, len;
+ i32 i, /* -1: error condition. otherwise, current cursor position */
+ len; /* -1: dynamically allocated. otherwise, buffer length */
};
-VG_STATIC void vg_strnull( vg_str *str, char *buffer, u32 len )
-{
+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;
+}
+
+/*
+ * 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);
}
-VG_STATIC void vg_strcat( vg_str *str, const char *append )
-{
- for( u32 i=0; str->i < str->len; i++, str->i ++ ){
- str->buffer[ str->i ] = append[i];
+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 );
- if( append[i] == '\0' ) return;
+ str->buffer = NULL;
+ str->i = 0;
+ }
}
}
-VG_STATIC int vg_strgood( vg_str *str )
-{
- if( str->i == str->len ){
- if( str->buffer[str->i -1] == '\0' ) return 1;
- else return 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{
- str->buffer[ str->i ++ ] = '\0';
- return 1;
+ 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;
}
}
-VG_STATIC u32 vg_strdjb2( const char *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;
+}
+
+/*
+ * 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 );
+}
+
+/*
+ * 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;
+}
+
+/*
+ * 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;
+ }
+
+ return ptr;
+}
+
+static u32 vg_strdjb2( const char *str ){
u32 hash = 5381, c;
while( (c = *str++) )
return hash;
}
-#include <stdio.h>
-#include <dirent.h>
-#include <string.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <math.h>
-#include <assert.h>
+static int vg_strdjb2_eq( const char *s1, u32 h1,
+ const char *s2, u32 h2 )
+{
+ if( h1 == h2 ){
+ if(!strcmp(s1, s2)) return 1;
+ else return 0;
+ } else return 0;
+}
+
+#define VG_STRDJB2_EQ( CS1, S2, H2 ) \
+ vg_strdjb2_eq( CS1, vg_strdjb2(CS1), S2, H2 )
+
#define VG_MIN( A, B ) ((A)<(B)?(A):(B))
#define VG_MAX( A, B ) ((A)>(B)?(A):(B))
projects / vg.git / blobdiff