From: Richard Levitte Date: Thu, 2 Mar 2000 07:50:02 +0000 (+0000) Subject: Hack b_print.c to implement asprintf() functionality. Not enabled by X-Git-Tag: OpenSSL_0_9_5a-beta1~121 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=5ee0d9c4a3fbe6d42637a1bef3d13ca85c5c5c13;p=oweals%2Fopenssl.git Hack b_print.c to implement asprintf() functionality. Not enabled by default yet, I wanna play with it a bit more. For those who don't know: asprintf() is an allocating sprintf. The first argument to it is a double indirection to char instead of a single. --- diff --git a/crypto/bio/b_print.c b/crypto/bio/b_print.c index 21248fbb3b..fa603e4812 100644 --- a/crypto/bio/b_print.c +++ b/crypto/bio/b_print.c @@ -64,6 +64,8 @@ #include #include #include +#include +#include #include "cryptlib.h" #ifndef NO_SYS_TYPES_H #include @@ -78,6 +80,8 @@ static void dopr (char *buffer, size_t maxlen, size_t *retlen, const char *format, va_list args); +static void doapr (char **buffer, size_t *retlen, + const char *format, va_list args); int BIO_printf (BIO *bio, ...) { @@ -85,15 +89,32 @@ int BIO_printf (BIO *bio, ...) char *format; int ret; size_t retlen; +#ifdef USE_ALLOCATING_PRINT + char *hugebuf; +#else MS_STATIC char hugebuf[1024*2]; /* 10k in one chunk is the limit */ +#endif va_start(args, bio); format=va_arg(args, char *); +#ifndef USE_ALLOCATING_PRINT hugebuf[0]='\0'; dopr(hugebuf, sizeof(hugebuf), &retlen, format, args); - ret=BIO_write(bio, hugebuf, (int)retlen); +#else + hugebuf = NULL; + CRYPTO_push_info("doapr()"); + doapr(&hugebuf, &retlen, format, args); + if (hugebuf) + { +#endif + ret=BIO_write(bio, hugebuf, (int)retlen); +#ifdef USE_ALLOCATING_PRINT + Free(hugebuf); + } + CRYPTO_pop_info(); +#endif va_end(args); return(ret); } @@ -131,10 +152,22 @@ int BIO_printf (BIO *bio, ...) #define LLONG long #endif -static void fmtstr (char *, size_t *, size_t, char *, int, int, int); -static void fmtint (char *, size_t *, size_t, LLONG, int, int, int, int); -static void fmtfp (char *, size_t *, size_t, LDOUBLE, int, int, int); -static void dopr_outch (char *, size_t *, size_t, int); +static void fmtstr (void (*)(char **, size_t *, size_t *, int), + char **, size_t *, size_t *, 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 doapr_isbig (size_t, size_t); +static int dopr_copy (size_t); +static int doapr_copy (size_t); +static void dopr_outch (char **, size_t *, size_t *, int); +static void doapr_outch (char **, size_t *, size_t *, int); +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, + const char *format, va_list args); /* format read states */ #define DP_S_DEFAULT 0 @@ -172,6 +205,33 @@ dopr( size_t *retlen, const char *format, va_list args) +{ + _dopr(dopr_outch, dopr_isbig, dopr_copy, + &buffer, &maxlen, retlen, format, args); +} + +static void +doapr( + char **buffer, + size_t *retlen, + const char *format, + va_list args) +{ + size_t dummy_maxlen = 0; + _dopr(doapr_outch, doapr_isbig, doapr_copy, + buffer, &dummy_maxlen, retlen, format, args); +} + +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 **buffer, + size_t *maxlen, + size_t *retlen, + const char *format, + va_list args) { char ch; LLONG value; @@ -190,7 +250,7 @@ dopr( ch = *format++; while (state != DP_S_DONE) { - if ((ch == '\0') || (currlen >= maxlen)) + if ((ch == '\0') || (*isbig_fn)(currlen, *maxlen)) state = DP_S_DONE; switch (state) { @@ -198,7 +258,7 @@ dopr( if (ch == '%') state = DP_S_FLAGS; else - dopr_outch(buffer, &currlen, maxlen, ch); + (*outch_fn)(buffer, &currlen, maxlen, ch); ch = *format++; break; case DP_S_FLAGS: @@ -304,7 +364,8 @@ dopr( value = va_arg(args, int); break; } - fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags); + fmtint(outch_fn, buffer, &currlen, maxlen, + value, 10, min, max, flags); break; case 'X': flags |= DP_F_UP; @@ -329,7 +390,7 @@ dopr( unsigned int); break; } - fmtint(buffer, &currlen, maxlen, value, + fmtint(outch_fn, buffer, &currlen, maxlen, value, ch == 'o' ? 8 : (ch == 'u' ? 10 : 16), min, max, flags); break; @@ -338,7 +399,8 @@ dopr( fvalue = va_arg(args, LDOUBLE); else fvalue = va_arg(args, double); - fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags); + fmtfp(outch_fn, buffer, &currlen, maxlen, + fvalue, min, max, flags); break; case 'E': flags |= DP_F_UP; @@ -357,19 +419,19 @@ dopr( fvalue = va_arg(args, double); break; case 'c': - dopr_outch(buffer, &currlen, maxlen, + (*outch_fn)(buffer, &currlen, maxlen, va_arg(args, int)); break; case 's': strvalue = va_arg(args, char *); if (max < 0) - max = maxlen; - fmtstr(buffer, &currlen, maxlen, strvalue, - flags, min, max); + max = (*copy_fn)(*maxlen); + fmtstr(outch_fn, buffer, &currlen, maxlen, strvalue, + flags, min, max); break; case 'p': value = (long)va_arg(args, void *); - fmtint(buffer, &currlen, maxlen, + fmtint(outch_fn, buffer, &currlen, maxlen, value, 16, min, max, flags); break; case 'n': /* XXX */ @@ -392,7 +454,7 @@ dopr( } break; case '%': - dopr_outch(buffer, &currlen, maxlen, ch); + (*outch_fn)(buffer, &currlen, maxlen, ch); break; case 'w': /* not supported yet, treat as next char */ @@ -413,18 +475,19 @@ dopr( break; } } - if (currlen >= maxlen - 1) - currlen = maxlen - 1; - buffer[currlen] = '\0'; + if (currlen >= *maxlen - 1) + currlen = *maxlen - 1; + (*buffer)[currlen] = '\0'; *retlen = currlen; return; } static void fmtstr( - char *buffer, + void (*outch_fn)(char **, size_t *, size_t *, int), + char **buffer, size_t *currlen, - size_t maxlen, + size_t *maxlen, char *value, int flags, int min, @@ -444,16 +507,16 @@ fmtstr( padlen = -padlen; while ((padlen > 0) && (cnt < max)) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); --padlen; ++cnt; } while (*value && (cnt < max)) { - dopr_outch(buffer, currlen, maxlen, *value++); + (*outch_fn)(buffer, currlen, maxlen, *value++); ++cnt; } while ((padlen < 0) && (cnt < max)) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); ++padlen; ++cnt; } @@ -461,9 +524,10 @@ fmtstr( static void fmtint( - char *buffer, + void (*outch_fn)(char **, size_t *, size_t *, int), + char **buffer, size_t *currlen, - size_t maxlen, + size_t *maxlen, LLONG value, int base, int min, @@ -517,28 +581,28 @@ fmtint( /* spaces */ while (spadlen > 0) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); --spadlen; } /* sign */ if (signvalue) - dopr_outch(buffer, currlen, maxlen, signvalue); + (*outch_fn)(buffer, currlen, maxlen, signvalue); /* zeros */ if (zpadlen > 0) { while (zpadlen > 0) { - dopr_outch(buffer, currlen, maxlen, '0'); + (*outch_fn)(buffer, currlen, maxlen, '0'); --zpadlen; } } /* digits */ while (place > 0) - dopr_outch(buffer, currlen, maxlen, convert[--place]); + (*outch_fn)(buffer, currlen, maxlen, convert[--place]); /* left justified spaces */ while (spadlen < 0) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); ++spadlen; } return; @@ -577,9 +641,10 @@ round(LDOUBLE value) static void fmtfp( - char *buffer, + void (*outch_fn)(char **, size_t *, size_t *, int), + char **buffer, size_t *currlen, - size_t maxlen, + size_t *maxlen, LDOUBLE fvalue, int min, int max, @@ -657,54 +722,108 @@ fmtfp( if ((flags & DP_F_ZERO) && (padlen > 0)) { if (signvalue) { - dopr_outch(buffer, currlen, maxlen, signvalue); + (*outch_fn)(buffer, currlen, maxlen, signvalue); --padlen; signvalue = 0; } while (padlen > 0) { - dopr_outch(buffer, currlen, maxlen, '0'); + (*outch_fn)(buffer, currlen, maxlen, '0'); --padlen; } } while (padlen > 0) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); --padlen; } if (signvalue) - dopr_outch(buffer, currlen, maxlen, signvalue); + (*outch_fn)(buffer, currlen, maxlen, signvalue); while (iplace > 0) - dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]); + (*outch_fn)(buffer, currlen, maxlen, iconvert[--iplace]); /* * Decimal point. This should probably use locale to find the correct * char to print out. */ if (max > 0) { - dopr_outch(buffer, currlen, maxlen, '.'); + (*outch_fn)(buffer, currlen, maxlen, '.'); while (fplace > 0) - dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]); + (*outch_fn)(buffer, currlen, maxlen, fconvert[--fplace]); } while (zpadlen > 0) { - dopr_outch(buffer, currlen, maxlen, '0'); + (*outch_fn)(buffer, currlen, maxlen, '0'); --zpadlen; } while (padlen < 0) { - dopr_outch(buffer, currlen, maxlen, ' '); + (*outch_fn)(buffer, currlen, maxlen, ' '); ++padlen; } } +static int +dopr_copy( + size_t len) +{ + return len; +} + +static int +doapr_copy( + size_t len) +{ + /* Return as high an integer as possible */ + return INT_MAX; +} + +static int +dopr_isbig( + size_t currlen, + size_t maxlen) +{ + return currlen > maxlen; +} + +static int +doapr_isbig( + size_t currlen, + size_t maxlen) +{ + return 0; +} + static void dopr_outch( - char *buffer, + char **buffer, size_t *currlen, - size_t maxlen, + size_t *maxlen, + int c) +{ + if (*currlen < *maxlen) + (*buffer)[(*currlen)++] = (char)c; + return; +} + +static void +doapr_outch( + char **buffer, + size_t *currlen, + size_t *maxlen, int c) { - if (*currlen < maxlen) - buffer[(*currlen)++] = (char)c; + if (*buffer == NULL) { + if (*maxlen == 0) + *maxlen = 1024; + *buffer = Malloc(*maxlen); + } + while (*currlen >= *maxlen) { + *maxlen += 1024; + *buffer = Realloc(*buffer, *maxlen); + } + /* What to do if *buffer is NULL? */ + assert(*buffer != NULL); + + (*buffer)[(*currlen)++] = (char)c; return; }