diff options
author | Richard Levitte <levitte@openssl.org> | 2000-09-07 05:50:14 +0000 |
---|---|---|
committer | Richard Levitte <levitte@openssl.org> | 2000-09-07 05:50:14 +0000 |
commit | 827dbcb150a464585fe9274c1ad04d34ee51a131 (patch) | |
tree | 49867da1b02499279589493d52a3704c0a3df2b6 /crypto/bio/b_print.c | |
parent | 47770c4dfb886843df54a4c1d68beebbcbbeecf6 (diff) |
Change the printing mahine used by BIO_printf() and friends so it can
handle an externally provided "static" buffer as well a a dynamic
buffer. The "static" buffer is filled first, but if overflowed, the
dynamic buffer is used instead, being allocated somewhere i the heap.
This combines the benefits of putting the output in a preallocated
buffer (on the stack, for example) and in a buffer that grows
somewhere in the heap.
Diffstat (limited to 'crypto/bio/b_print.c')
-rw-r--r-- | crypto/bio/b_print.c | 249 |
1 files changed, 89 insertions, 160 deletions
diff --git a/crypto/bio/b_print.c b/crypto/bio/b_print.c index a00f0925d2..a62f551635 100644 --- a/crypto/bio/b_print.c +++ b/crypto/bio/b_print.c @@ -113,24 +113,15 @@ #define LLONG long #endif -static void fmtstr (void (*)(char **, size_t *, size_t *, int), - char **, size_t *, size_t *, const char *, int, int, - int); -static void fmtint (void (*)(char **, size_t *, size_t *, int), - char **, size_t *, size_t *, LLONG, int, int, int, int); -static void fmtfp (void (*)(char **, size_t *, size_t *, int), - char **, size_t *, size_t *, LDOUBLE, int, int, int); -static int dopr_isbig (size_t, size_t); -static int dopr_copy (size_t); -static void dopr_outch (char **, size_t *, size_t *, int); -#ifdef USE_ALLOCATING_PRINT -static int doapr_isbig (size_t, size_t); -static int doapr_copy (size_t); -static void doapr_outch (char **, size_t *, size_t *, int); -#endif -static void _dopr(void (*)(char **, size_t *, size_t *, int), - int (*)(size_t, size_t), int (*)(size_t), - char **buffer, size_t *maxlen, size_t *retlen, int *truncated, +static void fmtstr (char **, char **, size_t *, size_t *, + const char *, int, int, int); +static void fmtint (char **, char **, size_t *, size_t *, + LLONG, int, int, int, int); +static void fmtfp (char **, char **, size_t *, size_t *, + LDOUBLE, int, int, int); +static void doapr_outch (char **, char **, size_t *, size_t *, int); +static void _dopr(char **sbuffer, char **buffer, + size_t *maxlen, size_t *retlen, int *truncated, const char *format, va_list args); /* format read states */ @@ -162,40 +153,9 @@ static void _dopr(void (*)(char **, size_t *, size_t *, int), #define char_to_int(p) (p - '0') #define MAX(p,q) ((p >= q) ? p : q) -#ifndef USE_ALLOCATING_PRINT -static void -dopr( - char *buffer, - size_t maxlen, - size_t *retlen, - const char *format, - va_list args) -{ - int ignored; - _dopr(dopr_outch, dopr_isbig, dopr_copy, - &buffer, &maxlen, retlen, &ignored, format, args); -} - -#else -static void -doapr( - char **buffer, - size_t *retlen, - const char *format, - va_list args) -{ - size_t dummy_maxlen = 0; - int ignored; - _dopr(doapr_outch, doapr_isbig, doapr_copy, - buffer, &dummy_maxlen, retlen, &ignored, format, args); -} -#endif - static void _dopr( - void (*outch_fn)(char **, size_t *, size_t *, int), - int (*isbig_fn)(size_t, size_t), - int (*copy_fn)(size_t), + char **sbuffer, char **buffer, size_t *maxlen, size_t *retlen, @@ -220,7 +180,7 @@ _dopr( ch = *format++; while (state != DP_S_DONE) { - if ((ch == '\0') || (*isbig_fn)(currlen, *maxlen)) + if (ch == '\0' || (buffer == NULL && currlen >= *maxlen)) state = DP_S_DONE; switch (state) { @@ -228,7 +188,7 @@ _dopr( if (ch == '%') state = DP_S_FLAGS; else - (*outch_fn)(buffer, &currlen, maxlen, ch); + doapr_outch(sbuffer,buffer, &currlen, maxlen, ch); ch = *format++; break; case DP_S_FLAGS: @@ -334,7 +294,7 @@ _dopr( value = va_arg(args, int); break; } - fmtint(outch_fn, buffer, &currlen, maxlen, + fmtint(sbuffer, buffer, &currlen, maxlen, value, 10, min, max, flags); break; case 'X': @@ -360,7 +320,7 @@ _dopr( unsigned int); break; } - fmtint(outch_fn, buffer, &currlen, maxlen, value, + fmtint(sbuffer, buffer, &currlen, maxlen, value, ch == 'o' ? 8 : (ch == 'u' ? 10 : 16), min, max, flags); break; @@ -369,7 +329,7 @@ _dopr( fvalue = va_arg(args, LDOUBLE); else fvalue = va_arg(args, double); - fmtfp(outch_fn, buffer, &currlen, maxlen, + fmtfp(sbuffer, buffer, &currlen, maxlen, fvalue, min, max, flags); break; case 'E': @@ -389,19 +349,23 @@ _dopr( fvalue = va_arg(args, double); break; case 'c': - (*outch_fn)(buffer, &currlen, maxlen, + doapr_outch(sbuffer, buffer, &currlen, maxlen, va_arg(args, int)); break; case 's': strvalue = va_arg(args, char *); - if (max < 0) - max = (*copy_fn)(*maxlen); - fmtstr(outch_fn, buffer, &currlen, maxlen, strvalue, + if (max < 0) { + if (buffer) + max = INT_MAX; + else + max = *maxlen; + } + fmtstr(sbuffer, buffer, &currlen, maxlen, strvalue, flags, min, max); break; case 'p': value = (long)va_arg(args, void *); - fmtint(outch_fn, buffer, &currlen, maxlen, + fmtint(sbuffer, buffer, &currlen, maxlen, value, 16, min, max, flags); break; case 'n': /* XXX */ @@ -424,7 +388,7 @@ _dopr( } break; case '%': - (*outch_fn)(buffer, &currlen, maxlen, ch); + doapr_outch(sbuffer, buffer, &currlen, maxlen, ch); break; case 'w': /* not supported yet, treat as next char */ @@ -448,14 +412,14 @@ _dopr( *truncated = (currlen > *maxlen - 1); if (*truncated) currlen = *maxlen - 1; - (*buffer)[currlen] = '\0'; - *retlen = currlen; + doapr_outch(sbuffer, buffer, &currlen, maxlen, '\0'); + *retlen = currlen - 1; return; } static void fmtstr( - void (*outch_fn)(char **, size_t *, size_t *, int), + char **sbuffer, char **buffer, size_t *currlen, size_t *maxlen, @@ -478,16 +442,16 @@ fmtstr( padlen = -padlen; while ((padlen > 0) && (cnt < max)) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); --padlen; ++cnt; } while (*value && (cnt < max)) { - (*outch_fn)(buffer, currlen, maxlen, *value++); + doapr_outch(sbuffer, buffer, currlen, maxlen, *value++); ++cnt; } while ((padlen < 0) && (cnt < max)) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); ++padlen; ++cnt; } @@ -495,7 +459,7 @@ fmtstr( static void fmtint( - void (*outch_fn)(char **, size_t *, size_t *, int), + char **sbuffer, char **buffer, size_t *currlen, size_t *maxlen, @@ -552,28 +516,28 @@ fmtint( /* spaces */ while (spadlen > 0) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); --spadlen; } /* sign */ if (signvalue) - (*outch_fn)(buffer, currlen, maxlen, signvalue); + doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue); /* zeros */ if (zpadlen > 0) { while (zpadlen > 0) { - (*outch_fn)(buffer, currlen, maxlen, '0'); + doapr_outch(sbuffer, buffer, currlen, maxlen, '0'); --zpadlen; } } /* digits */ while (place > 0) - (*outch_fn)(buffer, currlen, maxlen, convert[--place]); + doapr_outch(sbuffer, buffer, currlen, maxlen, convert[--place]); /* left justified spaces */ while (spadlen < 0) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); ++spadlen; } return; @@ -612,7 +576,7 @@ round(LDOUBLE value) static void fmtfp( - void (*outch_fn)(char **, size_t *, size_t *, int), + char **sbuffer, char **buffer, size_t *currlen, size_t *maxlen, @@ -693,117 +657,85 @@ fmtfp( if ((flags & DP_F_ZERO) && (padlen > 0)) { if (signvalue) { - (*outch_fn)(buffer, currlen, maxlen, signvalue); + doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue); --padlen; signvalue = 0; } while (padlen > 0) { - (*outch_fn)(buffer, currlen, maxlen, '0'); + doapr_outch(sbuffer, buffer, currlen, maxlen, '0'); --padlen; } } while (padlen > 0) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); --padlen; } if (signvalue) - (*outch_fn)(buffer, currlen, maxlen, signvalue); + doapr_outch(sbuffer, buffer, currlen, maxlen, signvalue); while (iplace > 0) - (*outch_fn)(buffer, currlen, maxlen, iconvert[--iplace]); + doapr_outch(sbuffer, buffer, currlen, maxlen, iconvert[--iplace]); /* * Decimal point. This should probably use locale to find the correct * char to print out. */ if (max > 0) { - (*outch_fn)(buffer, currlen, maxlen, '.'); + doapr_outch(sbuffer, buffer, currlen, maxlen, '.'); while (fplace > 0) - (*outch_fn)(buffer, currlen, maxlen, fconvert[--fplace]); + doapr_outch(sbuffer, buffer, currlen, maxlen, fconvert[--fplace]); } while (zpadlen > 0) { - (*outch_fn)(buffer, currlen, maxlen, '0'); + doapr_outch(sbuffer, buffer, currlen, maxlen, '0'); --zpadlen; } while (padlen < 0) { - (*outch_fn)(buffer, currlen, maxlen, ' '); + doapr_outch(sbuffer, buffer, currlen, maxlen, ' '); ++padlen; } } -static int -dopr_copy( - size_t len) -{ - return len; -} - -#ifdef USE_ALLOCATING_PRINT -static int -doapr_copy( - size_t len) -{ - /* Return as high an integer as possible */ - return INT_MAX; -} -#endif - -static int -dopr_isbig( - size_t currlen, - size_t maxlen) -{ - return currlen > maxlen; -} - -#ifdef USE_ALLOCATING_PRINT -static int -doapr_isbig( - size_t currlen, - size_t maxlen) -{ - return 0; -} -#endif - -static void -dopr_outch( - char **buffer, - size_t *currlen, - size_t *maxlen, - int c) -{ - if (*currlen < *maxlen) - (*buffer)[(*currlen)++] = (char)c; - return; -} - -#ifdef USE_ALLOCATING_PRINT static void doapr_outch( + char **sbuffer, char **buffer, size_t *currlen, size_t *maxlen, int c) { - if (*buffer == NULL) { - if (*maxlen == 0) - *maxlen = 1024; - *buffer = OPENSSL_malloc(*maxlen); + /* If we haven't at least one buffer, someone has doe a big booboo */ + assert(*sbuffer != NULL || buffer != NULL); + + if (buffer) { + while (*currlen >= *maxlen) { + if (*buffer == NULL) { + assert(*sbuffer != NULL); + if (*maxlen == 0) + *maxlen = 1024; + *buffer = OPENSSL_malloc(*maxlen); + if (*currlen > 0) + memcpy(*buffer, *sbuffer, *currlen); + *sbuffer = NULL; + } else { + *maxlen += 1024; + *buffer = OPENSSL_realloc(*buffer, *maxlen); + } + } + /* What to do if *buffer is NULL? */ + assert(*sbuffer != NULL || *buffer != NULL); } - while (*currlen >= *maxlen) { - *maxlen += 1024; - *buffer = OPENSSL_realloc(*buffer, *maxlen); + + if (*currlen < *maxlen) { + if (*sbuffer) + (*sbuffer)[(*currlen)++] = (char)c; + else + (*buffer)[(*currlen)++] = (char)c; } - /* What to do if *buffer is NULL? */ - assert(*buffer != NULL); - (*buffer)[(*currlen)++] = (char)c; return; } -#endif /***************************************************************************/ @@ -824,29 +756,26 @@ int BIO_vprintf (BIO *bio, const char *format, va_list args) { int ret; size_t retlen; -#ifdef USE_ALLOCATING_PRINT - char *hugebuf; -#else MS_STATIC char hugebuf[1024*10]; -#endif + char *hugebufp = hugebuf; + size_t hugebufsize = sizeof(hugebuf); + char *dynbuf = NULL; + int ignored; -#ifndef USE_ALLOCATING_PRINT - hugebuf[0]='\0'; - dopr(hugebuf, sizeof(hugebuf), &retlen, format, args); -#else - hugebuf = NULL; + dynbuf = NULL; CRYPTO_push_info("doapr()"); - doapr(&hugebuf, &retlen, format, args); - if (hugebuf) + _dopr(&hugebufp, &dynbuf, &hugebufsize, + &retlen, &ignored, format, args); + if (dynbuf) + { + ret=BIO_write(bio, dynbuf, (int)retlen); + OPENSSL_free(dynbuf); + } + else { -#endif ret=BIO_write(bio, hugebuf, (int)retlen); - -#ifdef USE_ALLOCATING_PRINT - OPENSSL_free(hugebuf); } CRYPTO_pop_info(); -#endif return(ret); } @@ -872,8 +801,8 @@ int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) size_t retlen; int truncated; - _dopr(dopr_outch, dopr_isbig, dopr_copy, - &buf, &n, &retlen, &truncated, format, args); + _dopr(&buf, NULL, &n, &retlen, &truncated, format, args); + if (truncated) /* In case of truncation, return -1 like traditional snprintf. * (Current drafts for ISO/IEC 9899 say snprintf should return |