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