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dtb 2023-08-30 14:27:53 -04:00
parent ac638c48eb
commit bacd306020
1 changed files with 41 additions and 22 deletions
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63
libfatstr/libfatstr.c
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@ -1,42 +1,35 @@
#include <stdlib.h> /* free(3), malloc(3), realloc(3) */ #include <stdlib.h> /* free(3), malloc(3), realloc(3) */
#include <string.h> /* strncpy(3) */ #include <string.h> /* strncpy(3), size_t */
#include "libfatstr.h" #include "libfatstr.h"
/* quick and dirty ASCII edition */ /* quick and dirty ASCII edition */
/* Size by which to grow memory allocations. */ /* Size by which to grow memory allocations. */
#define GROW_INTERVAL 100 static size_t FatStr_growinterval = 100; /* in sizeof chars */
struct FatStr *
FatStr_initialize(struct FatStr *p){
if((p->v = malloc((sizeof *(p->v)) * GROW_INTERVAL)) == NULL)
return NULL; /* who knows */
p->a = GROW_INTERVAL;
p->s = 0;
return p;
}
struct FatStr * struct FatStr *
FatStr_append(struct FatStr *p, FatStr_scalar_t c){ FatStr_append(struct FatStr *p, FatStr_scalar_t c){
FatStr_vector_t t; FatStr_vector_t t;
if(p->s + 1 > p->a){ if(p == NULL || (p->s + (sizeof *(p->v)) > p->a
if((t = realloc(p->v, (sizeof *(p->v)) * (p->a + GROW_INTERVAL))) && FatStr_grow(p, FatStr_growinterval) == NULL))
== NULL) return NULL;
return NULL;
p->a += GROW_INTERVAL;
}
(p->v)[(p->s)++] = c; (p->v)[(p->s)++] = c;
return p;
}
struct FatStr *
FatStr_construct(struct FatStr *p){
return FatStr_grow(FatStr_initialize(p), FatStr_growinterval);
} }
/* retval will need to be freed */
char * char *
FatStr_convert(struct FatStr *p){ FatStr_convert(struct FatStr *p){
char *r; char *r;
/* allocation might be wrong */ /* allocation might be wrong */
return ((r = malloc(p->s * (sizeof *(p->v)))) == NULL) return (p == NULL || (r = malloc(p->s * (sizeof *(p->v)))) == NULL)
? NULL ? NULL
: strncpy(r, p->v, p->s) : strncpy(r, p->v, p->s)
; ;
@ -44,10 +37,36 @@ FatStr_convert(struct FatStr *p){
struct FatStr * struct FatStr *
FatStr_destruct(struct FatStr *p){ FatStr_destruct(struct FatStr *p){
free(p->v);
if(p != NULL){
free(p->v);
FatStr_initialize(p);
}
return NULL; return NULL;
} }
struct FatStr * struct FatStr *
FatStr_trimfront(){ FatStr_grow(struct FatStr *p, size_t units){
FatStr_vector_t t;
if(p == NULL || (t = realloc(p->v, p->a + units)) == NULL)
return NULL;
p->a += units;
p->v = t;
return p;
}
struct FatStr *
FatStr_initialize(struct FatStr *p){
if(p != NULL){
p->a = 0;
p->s = 0;
p->v = NULL;
}
return p;
}
struct FatStr *
FatStr_trimfront(struct FatStr *p, size_t units){
} }