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Remove duplicate code from the ast_str API. We now use __AST_STR_* to

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access 'struct ast_str' members, but this must only be used inside the API implementation.

(closes issue #14098)
Reported by: eliel
Patches:
      ast_str.patch uploaded by eliel (license 64)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@165502 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Eliel C. Sardanons
2008-12-18 15:25:15 +00:00
parent 9e3ecac5ab
commit 344a37f2a7
2 changed files with 78 additions and 261 deletions
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230
include/asterisk/strings.h
View File

@@ -30,6 +30,18 @@
#include "asterisk/utils.h"
#include "asterisk/threadstorage.h"
#if defined(DEBUG_OPAQUE)
#define __AST_STR_USED used2
#define __AST_STR_LEN len2
#define __AST_STR_STR str2
#define __AST_STR_TS ts2
#else
#define __AST_STR_USED used
#define __AST_STR_LEN len
#define __AST_STR_STR str
#define __AST_STR_TS ts
#endif
/* You may see casts in this header that may seem useless but they ensure this file is C++ clean */
#define AS_OR(a,b) (a && ast_str_strlen(a)) ? ast_str_buffer(a) : (b)
@@ -340,23 +352,13 @@ int ast_get_timeval(const char *src, struct timeval *tv, struct timeval _default
* struct ast_threadstorage pointer.
*/
struct ast_str {
#ifdef DEBUG_OPAQUE
size_t len2;
size_t used2;
struct ast_threadstorage *ts2;
#else
size_t len; /*!< The current maximum length of the string */
size_t used; /*!< Amount of space used */
struct ast_threadstorage *ts; /*!< What kind of storage is this ? */
#endif
size_t __AST_STR_LEN; /*!< The current maximum length of the string */
size_t __AST_STR_USED; /*!< Amount of space used */
struct ast_threadstorage *__AST_STR_TS; /*!< What kind of storage is this ? */
#define DS_MALLOC ((struct ast_threadstorage *)1)
#define DS_ALLOCA ((struct ast_threadstorage *)2)
#define DS_STATIC ((struct ast_threadstorage *)3) /* not supported yet */
#ifdef DEBUG_OPAQUE
char str2[0];
#else
char str[0]; /*!< The string buffer */
#endif
char __AST_STR_STR[0]; /*!< The string buffer */
};
/*!
@@ -379,15 +381,9 @@ struct ast_str * attribute_malloc ast_str_create(size_t init_len),
if (buf == NULL)
return NULL;
#ifdef DEBUG_OPAQUE
buf->len2 = init_len;
buf->used2 = 0;
buf->ts2 = DS_MALLOC;
#else
buf->len = init_len;
buf->used = 0;
buf->ts = DS_MALLOC;
#endif
buf->__AST_STR_LEN = init_len;
buf->__AST_STR_USED = 0;
buf->__AST_STR_TS = DS_MALLOC;
return buf;
}
@@ -400,15 +396,9 @@ AST_INLINE_API(
void ast_str_reset(struct ast_str *buf),
{
if (buf) {
#ifdef DEBUG_OPAQUE
buf->used2 = 0;
if (buf->len2)
buf->str2[0] = '\0';
#else
buf->used = 0;
if (buf->len)
buf->str[0] = '\0';
#endif
buf->__AST_STR_USED = 0;
if (buf->__AST_STR_LEN)
buf->__AST_STR_STR[0] = '\0';
}
}
)
@@ -422,15 +412,9 @@ void ast_str_trim_blanks(struct ast_str *buf),
if (!buf) {
return;
}
#ifdef DEBUG_OPAQUE
while (buf->used2 && buf->str2[buf->used2 - 1] < 33) {
buf->str2[--(buf->used2)] = '\0';
while (buf->__AST_STR_USED && buf->__AST_STR_STR[buf->__AST_STR_USED - 1] < 33) {
buf->__AST_STR_STR[--(buf->__AST_STR_USED)] = '\0';
}
#else
while (buf->used && buf->str[buf->used - 1] < 33) {
buf->str[--(buf->used)] = '\0';
}
#endif
}
)
@@ -440,11 +424,7 @@ void ast_str_trim_blanks(struct ast_str *buf),
AST_INLINE_API(
size_t ast_str_strlen(struct ast_str *buf),
{
#ifdef DEBUG_OPAQUE
return buf->used2;
#else
return buf->used;
#endif
return buf->__AST_STR_USED;
}
)
@@ -454,11 +434,7 @@ size_t ast_str_strlen(struct ast_str *buf),
AST_INLINE_API(
size_t ast_str_size(struct ast_str *buf),
{
#ifdef DEBUG_OPAQUE
return buf->len2;
#else
return buf->len;
#endif
return buf->__AST_STR_LEN;
}
)
@@ -468,34 +444,20 @@ size_t ast_str_size(struct ast_str *buf),
AST_INLINE_API(
attribute_pure char *ast_str_buffer(struct ast_str *buf),
{
#ifdef DEBUG_OPAQUE
return buf->str2;
#else
return buf->str;
#endif
return buf->__AST_STR_STR;
}
)
AST_INLINE_API(
char *ast_str_truncate(struct ast_str *buf, ssize_t len),
{
#ifdef DEBUG_OPAQUE
if (len < 0) {
buf->used2 += ((ssize_t) abs(len)) > (ssize_t) buf->used2 ? -buf->used2 : len;
buf->__AST_STR_USED += ((ssize_t) abs(len)) > (ssize_t) buf->__AST_STR_USED ? -buf->__AST_STR_USED : len;
} else {
buf->used2 = len;
buf->__AST_STR_USED = len;
}
buf->str2[buf->used2] = '\0';
return buf->str2;
#else
if (len < 0) {
buf->used += ((ssize_t) abs(len)) > (ssize_t) buf->used ? -buf->used : len;
} else {
buf->used = len;
}
buf->str[buf->used] = '\0';
return buf->str;
#endif
buf->__AST_STR_STR[buf->__AST_STR_USED] = '\0';
return buf->__AST_STR_STR;
}
)
@@ -522,39 +484,21 @@ int _ast_str_make_space(struct ast_str **buf, size_t new_len, const char *file,
{
struct ast_str *old_buf = *buf;
#ifdef DEBUG_OPAQUE
if (new_len <= (*buf)->len2)
if (new_len <= (*buf)->__AST_STR_LEN)
return 0; /* success */
if ((*buf)->ts2 == DS_ALLOCA || (*buf)->ts2 == DS_STATIC)
if ((*buf)->__AST_STR_TS == DS_ALLOCA || (*buf)->__AST_STR_TS == DS_STATIC)
return -1; /* cannot extend */
*buf = (struct ast_str *)__ast_realloc(*buf, new_len + sizeof(struct ast_str), file, lineno, function);
if (*buf == NULL) {
*buf = old_buf;
return -1;
}
if ((*buf)->ts2 != DS_MALLOC) {
pthread_setspecific((*buf)->ts2->key, *buf);
if ((*buf)->__AST_STR_TS != DS_MALLOC) {
pthread_setspecific((*buf)->__AST_STR_TS->key, *buf);
_DB1(__ast_threadstorage_object_replace(old_buf, *buf, new_len + sizeof(struct ast_str));)
}
(*buf)->len2 = new_len;
#else
if (new_len <= (*buf)->len)
return 0; /* success */
if ((*buf)->ts == DS_ALLOCA || (*buf)->ts == DS_STATIC)
return -1; /* cannot extend */
*buf = (struct ast_str *)__ast_realloc(*buf, new_len + sizeof(struct ast_str), file, lineno, function);
if (*buf == NULL) {
*buf = old_buf;
return -1;
}
if ((*buf)->ts != DS_MALLOC) {
pthread_setspecific((*buf)->ts->key, *buf);
_DB1(__ast_threadstorage_object_replace(old_buf, *buf, new_len + sizeof(struct ast_str));)
}
(*buf)->len = new_len;
#endif
(*buf)->__AST_STR_LEN = new_len;
return 0;
}
)
@@ -565,67 +509,36 @@ int ast_str_make_space(struct ast_str **buf, size_t new_len),
{
struct ast_str *old_buf = *buf;
#ifdef DEBUG_OPAQUE
if (new_len <= (*buf)->len2)
if (new_len <= (*buf)->__AST_STR_LEN)
return 0; /* success */
if ((*buf)->ts2 == DS_ALLOCA || (*buf)->ts2 == DS_STATIC)
if ((*buf)->__AST_STR_TS == DS_ALLOCA || (*buf)->__AST_STR_TS == DS_STATIC)
return -1; /* cannot extend */
*buf = (struct ast_str *)ast_realloc(*buf, new_len + sizeof(struct ast_str));
if (*buf == NULL) {
*buf = old_buf;
return -1;
}
if ((*buf)->ts2 != DS_MALLOC) {
pthread_setspecific((*buf)->ts2->key, *buf);
if ((*buf)->__AST_STR_TS != DS_MALLOC) {
pthread_setspecific((*buf)->__AST_STR_TS->key, *buf);
_DB1(__ast_threadstorage_object_replace(old_buf, *buf, new_len + sizeof(struct ast_str));)
}
(*buf)->len2 = new_len;
#else
if (new_len <= (*buf)->len)
return 0; /* success */
if ((*buf)->ts == DS_ALLOCA || (*buf)->ts == DS_STATIC)
return -1; /* cannot extend */
*buf = (struct ast_str *)ast_realloc(*buf, new_len + sizeof(struct ast_str));
if (*buf == NULL) {
*buf = old_buf;
return -1;
}
if ((*buf)->ts != DS_MALLOC) {
pthread_setspecific((*buf)->ts->key, *buf);
_DB1(__ast_threadstorage_object_replace(old_buf, *buf, new_len + sizeof(struct ast_str));)
}
(*buf)->len = new_len;
#endif
(*buf)->__AST_STR_LEN = new_len;
return 0;
}
)
#endif
#ifdef DEBUG_OPAQUE
#define ast_str_alloca(init_len) \
({ \
struct ast_str *__ast_str_buf; \
__ast_str_buf = alloca(sizeof(*__ast_str_buf) + init_len); \
__ast_str_buf->len2 = init_len; \
__ast_str_buf->used2 = 0; \
__ast_str_buf->ts2 = DS_ALLOCA; \
__ast_str_buf->str2[0] = '\0'; \
__ast_str_buf->__AST_STR_LEN = init_len; \
__ast_str_buf->__AST_STR_USED = 0; \
__ast_str_buf->__AST_STR_TS = DS_ALLOCA; \
__ast_str_buf->__AST_STR_STR[0] = '\0'; \
(__ast_str_buf); \
})
#else
#define ast_str_alloca(init_len) \
({ \
struct ast_str *__ast_str_buf; \
__ast_str_buf = alloca(sizeof(*__ast_str_buf) + init_len); \
__ast_str_buf->len = init_len; \
__ast_str_buf->used = 0; \
__ast_str_buf->ts = DS_ALLOCA; \
__ast_str_buf->str[0] = '\0'; \
(__ast_str_buf); \
})
#endif
/*!
* \brief Retrieve a thread locally stored dynamic string
@@ -669,19 +582,11 @@ struct ast_str *ast_str_thread_get(struct ast_threadstorage *ts,
if (buf == NULL)
return NULL;
#ifdef DEBUG_OPAQUE
if (!buf->len2) {
buf->len2 = init_len;
buf->used2 = 0;
buf->ts2 = ts;
if (!buf->__AST_STR_LEN) {
buf->__AST_STR_LEN = init_len;
buf->__AST_STR_USED = 0;
buf->__AST_STR_TS = ts;
}
#else
if (!buf->len) {
buf->len = init_len;
buf->used = 0;
buf->ts = ts;
}
#endif
return buf;
}
@@ -697,19 +602,11 @@ struct ast_str *__ast_str_thread_get(struct ast_threadstorage *ts,
if (buf == NULL)
return NULL;
#ifdef DEBUG_OPAQUE
if (!buf->len2) {
buf->len2 = init_len;
buf->used2 = 0;
buf->ts2 = ts;
if (!buf->__AST_STR_LEN) {
buf->__AST_STR_LEN = init_len;
buf->__AST_STR_USED = 0;
buf->__AST_STR_TS = ts;
}
#else
if (!buf->len) {
buf->len = init_len;
buf->used = 0;
buf->ts = ts;
}
#endif
return buf;
}
@@ -862,27 +759,15 @@ AST_INLINE_API(SQLRETURN ast_str_SQLGetData(struct ast_str **buf, size_t maxlen,
{
SQLRETURN res;
if (maxlen == 0) {
#ifdef DEBUG_OPAQUE
if (SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->str2, 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
if (SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->__AST_STR_STR, 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
ast_str_make_space(buf, *StrLen_or_Ind + 1);
}
maxlen = (*buf)->len2;
maxlen = (*buf)->__AST_STR_LEN;
} else if (maxlen > 0) {
ast_str_make_space(buf, maxlen);
}
res = SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->str2, maxlen, StrLen_or_Ind);
(*buf)->used2 = *StrLen_or_Ind;
#else
if (SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->str, 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
ast_str_make_space(buf, *StrLen_or_Ind + 1);
}
maxlen = (*buf)->len;
} else if (maxlen > 0) {
ast_str_make_space(buf, maxlen);
}
res = SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->str, maxlen, StrLen_or_Ind);
(*buf)->used = *StrLen_or_Ind;
#endif
res = SQLGetData(StatementHandle, ColumnNumber, TargetType, (*buf)->__AST_STR_STR, maxlen, StrLen_or_Ind);
(*buf)->__AST_STR_USED = *StrLen_or_Ind;
return res;
}
)
@@ -977,4 +862,5 @@ static force_inline int ast_str_case_hash(const char *str)
return abs(hash);
}
#endif /* _ASTERISK_STRINGS_H */

109
main/strings.c
View File

@@ -52,67 +52,39 @@ int __ast_str_helper(struct ast_str **buf, size_t max_len,
int append, const char *fmt, va_list ap)
{
int res, need;
#ifdef DEBUG_OPAQUE
int offset = (append && (*buf)->len2) ? (*buf)->used2 : 0;
#else
int offset = (append && (*buf)->len) ? (*buf)->used : 0;
#endif
int offset = (append && (*buf)->__AST_STR_LEN) ? (*buf)->__AST_STR_USED : 0;
va_list aq;
do {
if (max_len < 0) {
#ifdef DEBUG_OPAQUE
max_len = (*buf)->len2; /* don't exceed the allocated space */
#else
max_len = (*buf)->len; /* don't exceed the allocated space */
#endif
max_len = (*buf)->__AST_STR_LEN; /* don't exceed the allocated space */
}
/*
* Ask vsnprintf how much space we need. Remember that vsnprintf
* does not count the final '\0' so we must add 1.
*/
va_copy(aq, ap);
#ifdef DEBUG_OPAQUE
res = vsnprintf((*buf)->str2 + offset, (*buf)->len2 - offset, fmt, aq);
#else
res = vsnprintf((*buf)->str + offset, (*buf)->len - offset, fmt, aq);
#endif
res = vsnprintf((*buf)->__AST_STR_STR + offset, (*buf)->__AST_STR_LEN - offset, fmt, aq);
need = res + offset + 1;
/*
* If there is not enough space and we are below the max length,
* reallocate the buffer and return a message telling to retry.
*/
#ifdef DEBUG_OPAQUE
if (need > (*buf)->len2 && (max_len == 0 || (*buf)->len2 < max_len) ) {
#else
if (need > (*buf)->len && (max_len == 0 || (*buf)->len < max_len) ) {
#endif
if (need > (*buf)->__AST_STR_LEN && (max_len == 0 || (*buf)->__AST_STR_LEN < max_len) ) {
if (max_len && max_len < need) { /* truncate as needed */
need = max_len;
} else if (max_len == 0) { /* if unbounded, give more room for next time */
need += 16 + need / 4;
}
if (0) { /* debugging */
#ifdef DEBUG_OPAQUE
ast_verbose("extend from %d to %d\n", (int)(*buf)->len2, need);
#else
ast_verbose("extend from %d to %d\n", (int)(*buf)->len, need);
#endif
ast_verbose("extend from %d to %d\n", (int)(*buf)->__AST_STR_LEN, need);
}
if (ast_str_make_space(buf, need)) {
#ifdef DEBUG_OPAQUE
ast_verbose("failed to extend from %d to %d\n", (int)(*buf)->len2, need);
#else
ast_verbose("failed to extend from %d to %d\n", (int)(*buf)->len, need);
#endif
ast_verbose("failed to extend from %d to %d\n", (int)(*buf)->__AST_STR_LEN, need);
return AST_DYNSTR_BUILD_FAILED;
}
#ifdef DEBUG_OPAQUE
(*buf)->str2[offset] = '\0'; /* Truncate the partial write. */
#else
(*buf)->str[offset] = '\0'; /* Truncate the partial write. */
#endif
(*buf)->__AST_STR_STR[offset] = '\0'; /* Truncate the partial write. */
/* Restart va_copy before calling vsnprintf() again. */
va_end(aq);
@@ -121,11 +93,7 @@ int __ast_str_helper(struct ast_str **buf, size_t max_len,
break;
} while (1);
/* update space used, keep in mind the truncation */
#ifdef DEBUG_OPAQUE
(*buf)->used2 = (res + offset > (*buf)->len2) ? (*buf)->len2 : res + offset;
#else
(*buf)->used = (res + offset > (*buf)->len) ? (*buf)->len : res + offset;
#endif
(*buf)->__AST_STR_USED = (res + offset > (*buf)->__AST_STR_LEN) ? (*buf)->__AST_STR_LEN : res + offset;
return res;
}
@@ -133,73 +101,41 @@ int __ast_str_helper(struct ast_str **buf, size_t max_len,
void ast_str_substitute_variables(struct ast_str **buf, size_t maxlen, struct ast_channel *chan, const char *template)
{
int first = 1;
#ifdef DEBUG_OPAQUE
do {
ast_str_make_space(buf, maxlen ? maxlen :
(first ? strlen(template) * 2 : (*buf)->len2 * 2));
pbx_substitute_variables_helper_full(chan, NULL, template, (*buf)->str2, (*buf)->len2 - 1, &((*buf)->used2));
(first ? strlen(template) * 2 : (*buf)->__AST_STR_LEN * 2));
pbx_substitute_variables_helper_full(chan, NULL, template, (*buf)->__AST_STR_STR, (*buf)->__AST_STR_LEN - 1, &((*buf)->__AST_STR_USED));
first = 0;
} while (maxlen == 0 && (*buf)->len2 - 5 < (*buf)->used2);
#else
do {
ast_str_make_space(buf, maxlen ? maxlen :
(first ? strlen(template) * 2 : (*buf)->len * 2));
pbx_substitute_variables_helper_full(chan, NULL, template, (*buf)->str, (*buf)->len - 1, &((*buf)->used));
first = 0;
} while (maxlen == 0 && (*buf)->len - 5 < (*buf)->used);
#endif
} while (maxlen == 0 && (*buf)->__AST_STR_LEN - 5 < (*buf)->__AST_STR_USED);
}
char *__ast_str_helper2(struct ast_str **buf, size_t maxlen, const char *src, size_t maxsrc, int append, int escapecommas)
{
int dynamic = 0;
#ifdef DEBUG_OPAQUE
char *ptr = append ? &((*buf)->str2[(*buf)->used2]) : (*buf)->str2;
#else
char *ptr = append ? &((*buf)->str[(*buf)->used]) : (*buf)->str;
#endif
char *ptr = append ? &((*buf)->__AST_STR_STR[(*buf)->__AST_STR_USED]) : (*buf)->__AST_STR_STR;
if (!maxlen) {
dynamic = 1;
#ifdef DEBUG_OPAQUE
maxlen = (*buf)->len2;
#else
maxlen = (*buf)->len;
#endif
maxlen = (*buf)->__AST_STR_LEN;
}
while (*src && maxsrc && maxlen && (!escapecommas || (maxlen - 1))) {
if (escapecommas && (*src == '\\' || *src == ',')) {
*ptr++ = '\\';
maxlen--;
#ifdef DEBUG_OPAQUE
(*buf)->used2++;
#else
(*buf)->used++;
#endif
(*buf)->__AST_STR_USED++;
}
*ptr++ = *src++;
maxsrc--;
maxlen--;
#ifdef DEBUG_OPAQUE
(*buf)->used2++;
#else
(*buf)->used++;
#endif
(*buf)->__AST_STR_USED++;
if (dynamic && (!maxlen || (escapecommas && !(maxlen - 1)))) {
#ifdef DEBUG_OPAQUE
size_t old = (*buf)->len2;
if (ast_str_make_space(buf, (*buf)->len2 * 2)) {
size_t old = (*buf)->__AST_STR_LEN;
if (ast_str_make_space(buf, (*buf)->__AST_STR_LEN * 2)) {
/* If the buffer can't be extended, end it. */
break;
}
#else
size_t old = (*buf)->len;
if (ast_str_make_space(buf, (*buf)->len * 2)) {
/* If the buffer can't be extended, end it. */
break;
}
#endif
/* What we extended the buffer by */
maxlen = old;
}
@@ -208,12 +144,7 @@ char *__ast_str_helper2(struct ast_str **buf, size_t maxlen, const char *src, si
ptr--;
}
*ptr = '\0';
#ifdef DEBUG_OPAQUE
(*buf)->used2--;
return (*buf)->str2;
#else
(*buf)->used--;
return (*buf)->str;
#endif
(*buf)->__AST_STR_USED--;
return (*buf)->__AST_STR_STR;
}