Mercurial > noffle
view src/dynamicstring.c @ 243:6eb6c912a0e4 noffle
[svn] * src/group.c: Make comparison against NULL explicit in an if containing
an assignment, as I'm sad enough to think it is safer if it is obvious
that the assignment is meant to be there.
author | bears |
---|---|
date | Fri, 15 Mar 2002 10:49:56 +0000 |
parents | 24d4cd032da5 |
children | 5eece4dfd945 |
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line source
/* dynamicstring.c $Id: dynamicstring.c 316 2001-10-31 11:44:53Z bears $ */ #if HAVE_CONFIG_H #include <config.h> #endif #include <sys/types.h> #include "dynamicstring.h" #include "log.h" #include "portable.h" struct DynStr { int len; /* Current length (without trailing '\0') */ int max; /* Max length that fits into buffer (incl. trailing '\0') */ char *str; }; static void reallocStr( DynStr *self, int max ) { ASSERT( max >= 0 ); if ( max <= self->max ) return; if ( ! ( self->str = (char *)realloc( self->str, (size_t)max ) ) ) { Log_err( "Realloc of DynStr failed" ); exit( EXIT_FAILURE ); } if ( self->max == 0 ) /* First allocation? */ *(self->str) = '\0'; self->max = max; } DynStr * new_DynStr( int reserve ) { DynStr *s; if ( ! ( s = malloc( sizeof( DynStr ) ) ) ) { Log_err( "Allocation of DynStr failed" ); exit( EXIT_FAILURE ); } s->len = 0; s->max = 0; s->str = NULL; if ( reserve > 0 ) reallocStr( s, reserve + 1 ); return s; } void del_DynStr( DynStr *self ) { if ( ! self ) return; free( self->str ); self->str = NULL; free( self ); } int DynStr_len( const DynStr *self ) { return self->len; } const char * DynStr_str( const DynStr *self ) { return self->str; } void DynStr_app( DynStr *self, const char *s ) { int len; len = strlen( s ); if ( self->len + len + 1 > self->max ) reallocStr( self, self->len * 2 + len + 1 ); strcpy( self->str + self->len, s ); self->len += len; } void DynStr_appDynStr( DynStr *self, const DynStr *s ) { if ( self->len + s->len + 1 > self->max ) reallocStr( self, self->len * 2 + s->len + 1 ); memcpy( self->str + self->len, s->str, (size_t)s->len + 1 ); self->len += s->len; } void DynStr_appLn( DynStr *self, const char *s ) { DynStr_app( self, s ); DynStr_app( self, "\n" ); } void DynStr_appN( DynStr *self, const char *s, int n ) { int len = self->len; ASSERT( n >= 0 ); if ( len + n + 1 > self->max ) reallocStr( self, len * 2 + n + 1 ); strncat( self->str + len, s, (size_t)n ); self->len = len + strlen( self->str + len ); } void DynStr_clear( DynStr *self ) { self->len = 0; if ( self->max > 0 ) *(self->str) = '\0'; }