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/* this header file comes from libowfat, http://www.fefe.de/libowfat/ */
#ifndef STRALLOC_H
#define STRALLOC_H
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __pure__
#define __pure__
#endif
/* stralloc is the internal data structure all functions are working on.
* s is the string.
* len is the used length of the string.
* a is the allocated length of the string.
*/
typedef struct stralloc {
char* s;
size_t len;
size_t a;
} stralloc;
/* stralloc_init will initialize a stralloc.
* Previously allocated memory will not be freed; use stralloc_free for
* that. To assign an empty string, use stralloc_copys(sa,""). */
void stralloc_init(stralloc* sa);
/* stralloc_ready makes sure that sa has enough space allocated to hold
* len bytes: If sa is not allocated, stralloc_ready allocates at least
* len bytes of space, and returns 1. If sa is already allocated, but
* not enough to hold len bytes, stralloc_ready allocates at least len
* bytes of space, copies the old string into the new space, frees the
* old space, and returns 1. Note that this changes sa.s. If the
* allocation fails, stralloc_ready leaves sa alone and returns 0. */
int stralloc_ready(stralloc* sa,size_t len);
/* stralloc_readyplus is like stralloc_ready except that, if sa is
* already allocated, stralloc_readyplus adds the current length of sa
* to len. */
int stralloc_readyplus(stralloc* sa,size_t len);
/* stralloc_copyb copies the string buf[0], buf[1], ..., buf[len-1] into
* sa, allocating space if necessary, and returns 1. If it runs out of
* memory, stralloc_copyb leaves sa alone and returns 0. */
int stralloc_copyb(stralloc* sa,const char* buf,size_t len);
/* stralloc_copys copies a \0-terminated string from buf into sa,
* without the \0. It is the same as
* stralloc_copyb(&sa,buf,str_len(buf)). */
int stralloc_copys(stralloc* sa,const char* buf);
/* stralloc_copy copies the string stored in sa2 into sa. It is the same
* as stralloc_copyb(&sa,sa2.s,sa2.len). sa2 must already be allocated. */
int stralloc_copy(stralloc* sa,const stralloc* sa2);
/* stralloc_catb adds the string buf[0], buf[1], ... buf[len-1] to the
* end of the string stored in sa, allocating space if necessary, and
* returns 1. If sa is unallocated, stralloc_catb is the same as
* stralloc_copyb. If it runs out of memory, stralloc_catb leaves sa
* alone and returns 0. */
int stralloc_catb(stralloc* sa,const char* in,size_t len);
/* stralloc_cats is analogous to stralloc_copys */
int stralloc_cats(stralloc* sa,const char* in);
void stralloc_zero(stralloc* sa);
/* like stralloc_cats but can cat more than one string at once */
int stralloc_catm_internal(stralloc* sa,...);
#define stralloc_catm(sa,...) stralloc_catm_internal(sa,__VA_ARGS__,(char*)0)
#define stralloc_copym(sa,...) (stralloc_zero(sa), stralloc_catm_internal(sa,__VA_ARGS__,(char*)0))
/* stralloc_cat is analogous to stralloc_copy */
int stralloc_cat(stralloc* sa,const stralloc* in);
/* stralloc_append adds one byte in[0] to the end of the string stored
* in sa. It is the same as stralloc_catb(&sa,in,1). */
int stralloc_append(stralloc* sa,const char* in); /* beware: this takes a pointer to 1 char */
/* stralloc_starts returns 1 if the \0-terminated string in "in", without
* the terminating \0, is a prefix of the string stored in sa. Otherwise
* it returns 0. sa must already be allocated. */
int stralloc_starts(stralloc* sa,const char* in) __pure__;
/* stralloc_diff returns negative, 0, or positive, depending on whether
* a is lexicographically smaller than, equal to, or greater than the
* string b. */
int stralloc_diff(const stralloc* a,const stralloc* b) __pure__;
/* stralloc_diffs returns negative, 0, or positive, depending on whether
* a is lexicographically smaller than, equal to, or greater than the
* string b[0], b[1], ..., b[n]=='\0'. */
int stralloc_diffs(const stralloc* a,const char* b) __pure__;
#define stralloc_equal(a,b) (!stralloc_diff((a),(b)))
#define stralloc_equals(a,b) (!stralloc_diffs((a),(b)))
/* stralloc_0 appends \0 */
#define stralloc_0(sa) stralloc_append(sa,"")
/* stralloc_catulong0 appends a '0' padded ASCII representation of in */
int stralloc_catulong0(stralloc* sa,unsigned long int in,size_t n);
/* stralloc_catlong0 appends a '0' padded ASCII representation of in */
/* note that the n does not include the sign:
* stralloc_catlong0(&sa,-10,4) -> "-0010" */
int stralloc_catlong0(stralloc* sa,signed long int in,size_t n);
/* stralloc_free frees the storage associated with sa */
void stralloc_free(stralloc* sa);
#define stralloc_catlong(sa,l) (stralloc_catlong0((sa),(l),0))
#define stralloc_catulong(sa,l) (stralloc_catulong0((sa),(l),0))
#define stralloc_catuint0(sa,i,n) (stralloc_catulong0((sa),(i),(n)))
#define stralloc_catint0(sa,i,n) (stralloc_catlong0((sa),(i),(n)))
#define stralloc_catint(sa,i) (stralloc_catlong0((sa),(i),0))
#define stralloc_catuint(sa,i) (stralloc_catulong0((sa),(i),0))
/* remove last char. Return removed byte as unsigned char (or -1 if stralloc was empty). */
int stralloc_chop(stralloc* sa);
/* remove trailing "\r\n", "\n" or "\r". Return number of removed chars (0,1 or 2) */
int stralloc_chomp(stralloc* sa);
#ifdef BUFFER_H
/* write stralloc to buffer */
int buffer_putsa(buffer* b,const stralloc* sa);
/* write stralloc to buffer and flush */
int buffer_putsaflush(buffer* b,const stralloc* sa);
/* these "read token" functions return 1 for a complete token, 0 if
* EOF was hit or -1 on error. In contrast to the non-stralloc token
* functions, the separator is also put in the stralloc; use
* stralloc_chop or stralloc_chomp to get rid of it. */
/* WARNING! These token reading functions will not clear the stralloc!
* They _append_ the token to the contents of the stralloc. The idea is
* that this way these functions can be used on non-blocking sockets;
* when you get signalled EAGAIN, just call the functions again when new
* data is available. */
/* read token from buffer to stralloc */
int buffer_get_token_sa(buffer* b,stralloc* sa,const char* charset,size_t setlen);
/* read line from buffer to stralloc */
int buffer_getline_sa(buffer* b,stralloc* sa);
/* same as buffer_get_token_sa but empty sa first */
int buffer_get_new_token_sa(buffer* b,stralloc* sa,const char* charset,size_t setlen);
/* same as buffer_getline_sa but empty sa first */
int buffer_getnewline_sa(buffer* b,stralloc* sa);
typedef int (*sa_predicate)(stralloc* sa);
/* like buffer_get_token_sa but the token ends when your predicate says so */
int buffer_get_token_sa_pred(buffer* b,stralloc* sa,sa_predicate p);
/* same, but clear sa first */
int buffer_get_new_token_sa_pred(buffer* b,stralloc* sa,sa_predicate p);
/* make a buffer (for reading) from a stralloc.
* Do not change the stralloc after this! */
void buffer_fromsa(buffer* b,const stralloc* sa);
int buffer_tosa(buffer*b,stralloc* sa); /* write to sa, auto-growing it */
#endif
#ifdef __cplusplus
}
#endif
#endif