1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gclib/gcstring.c	Fri Jan 27 00:28:11 2012 +0000
     1.3 @@ -0,0 +1,90 @@
     1.4 +#include <stdlib.h>
     1.5 +#include <string.h>
     1.6 +#include <gclib/gcstring.h>
     1.7 +#include <gclib/types.h>
     1.8 +#include <gclib/mem.h>
     1.9 +#include <gclib/strfuncs.h>
    1.10 +
    1.11 +/*
    1.12 + * Strings which manage their own memory
    1.13 + */
    1.14 +
    1.15 +String *string_new(const char *init)
    1.16 +{
    1.17 +    String *string=mem_new(String,1);
    1.18 +    if (!init)
    1.19 +	init="";
    1.20 +    string->len=strlen(init);
    1.21 +    string->alloc=string->len+1;
    1.22 +    string->str=str_dup(init);
    1.23 +    return string;
    1.24 +}
    1.25 +
    1.26 +/*
    1.27 + * Free a string and either return the contents (if free_segment is FALSE)
    1.28 + * or free the contents as well and return NULL (if free_segment is TRUE).
    1.29 + */
    1.30 +char *string_free(String *string,boolean free_segment)
    1.31 +{
    1.32 +    char *retval;
    1.33 +    if (free_segment)
    1.34 +    {
    1.35 +	mem_free(string->str);
    1.36 +	retval=NULL;
    1.37 +    }
    1.38 +    else
    1.39 +	retval=string->str;
    1.40 +    mem_free(string);
    1.41 +    return retval;
    1.42 +}
    1.43 +
    1.44 +/*
    1.45 + * Append a byte to string.
    1.46 + */
    1.47 +void string_append_c(String *string,char c)
    1.48 +{
    1.49 +    if (string->len+1==string->alloc)
    1.50 +    {
    1.51 +	string->alloc*=2;
    1.52 +	string->str=mem_renew(char,string->str,string->alloc);
    1.53 +    }
    1.54 +    string->str[string->len++]=c;
    1.55 +    string->str[string->len]='\0';
    1.56 +}
    1.57 +
    1.58 +/*
    1.59 + * Append len bytes from s to string. len may be passed as <0 if s is
    1.60 + * a nul-terminated string of unknown length.
    1.61 + */
    1.62 +void string_append_len(String *string,const char *s,ssize_t len)
    1.63 +{
    1.64 +    if (len<0)
    1.65 +	len=strlen(s);
    1.66 +    if (string->len+len>=string->alloc)
    1.67 +    {
    1.68 +	while (string->len+len>=string->alloc)
    1.69 +	    string->alloc*=2;
    1.70 +	string->str=mem_renew(char,string->str,string->alloc);
    1.71 +    }
    1.72 +    memcpy(string->str+string->len,s,len);
    1.73 +    string->len+=len;
    1.74 +    string->str[string->len]='\0';
    1.75 +}
    1.76 +
    1.77 +/*
    1.78 + * Sets the length of a String. If the length is less than the current length,
    1.79 + * the string will be truncated. If the length is greater than the current
    1.80 + * length, the contents of the newly added area are undefined. (However, as
    1.81 + * always, string->str[string->len] will be a nul byte.)
    1.82 + */
    1.83 +void string_set_size(String *string,size_t len)
    1.84 +{
    1.85 +    if (len>=string->alloc)
    1.86 +    {
    1.87 +	while (len>=string->alloc)
    1.88 +	    string->alloc*=2;
    1.89 +	string->str=mem_renew(char,string->str,string->alloc);
    1.90 +    }
    1.91 +    string->len=len;
    1.92 +    string->str[string->len]='\0';
    1.93 +}