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Wed, 17 Jun 2020 19:47:17 +0000 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05HJlGIv51052952 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 17 Jun 2020 19:47:17 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E30762805C; Wed, 17 Jun 2020 19:47:16 +0000 (GMT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C0DA32805A; Wed, 17 Jun 2020 19:47:16 +0000 (GMT) Received: from localhost (unknown [9.40.194.84]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 17 Jun 2020 19:47:16 +0000 (GMT) To: gcc-patches@gcc.gnu.org Subject: [PATCH 04/28] rs6000: Add helper functions for parsing Date: Wed, 17 Jun 2020 14:46:27 -0500 Message-Id: <2fd573aba63f034f2d22fea6b3612cef5af70903.1592419211.git.wschmidt@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-17_10:2020-06-17, 2020-06-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 bulkscore=0 phishscore=0 priorityscore=1501 cotscore=-2147483648 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 suspectscore=1 clxscore=1015 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006170144 X-Spam-Status: No, score=-11.3 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Bill Schmidt via Gcc-patches From: Bill Schmidt Reply-To: Bill Schmidt Cc: dje.gcc@gmail.com, segher@kernel.crashing.org, willschm@linux.ibm.com Errors-To: gcc-patches-bounces@gcc.gnu.org Sender: "Gcc-patches" 2020-06-17 Bill Schmidt * config/rs6000/rs6000-gen-builtins.c (MININT): New defined constant. (exit_codes): New enum. (consume_whitespace): New function. (advance_line): Likewise. (safe_inc_pos): Likewise. (match_identifier): Likewise. (match_integer): Likewise. (match_to_right_bracket): Likewise. --- gcc/config/rs6000/rs6000-gen-builtins.c | 121 ++++++++++++++++++++++++ 1 file changed, 121 insertions(+) diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c index db7afa31f87..6b38a7f6101 100644 --- a/gcc/config/rs6000/rs6000-gen-builtins.c +++ b/gcc/config/rs6000/rs6000-gen-builtins.c @@ -141,6 +141,10 @@ along with GCC; see the file COPYING3. If not see #include #include +/* Used as a sentinel for range constraints on integer fields. No field can + be 32 bits wide, so this is a safe sentinel value. */ +#define MININT INT32_MIN + /* Input and output file descriptors and pathnames. */ static FILE *bif_file; static FILE *ovld_file; @@ -163,6 +167,11 @@ static char linebuf[LINELEN]; static int line; static int pos; +/* Exit codes for the shell. */ +enum exit_codes { + EC_INTERR +}; + /* Pointer to a diagnostic function. */ void (*diag) (const char *, ...) __attribute__ ((format (printf, 1, 2))) = NULL; @@ -188,3 +197,115 @@ ovld_diag (const char * fmt, ...) va_end (args); } +/* Pass over unprintable characters and whitespace (other than a newline, + which terminates the scan). */ +static void +consume_whitespace () +{ + while (pos < LINELEN && isspace(linebuf[pos]) && linebuf[pos] != '\n') + pos++; + return; +} + +/* Get the next nonblank, noncomment line, returning 0 on EOF, 1 otherwise. */ +static int +advance_line (FILE *file) +{ + while (1) + { + /* Read ahead one line and check for EOF. */ + if (!fgets (linebuf, sizeof(linebuf), file)) + return 0; + line++; + pos = 0; + consume_whitespace (); + if (linebuf[pos] != '\n' && linebuf[pos] != ';') + return 1; + } +} + +static inline void +safe_inc_pos () +{ + if (pos++ >= LINELEN) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } +} + +/* Match an identifier, returning NULL on failure, else a pointer to a + buffer containing the identifier. */ +static char * +match_identifier () +{ + int lastpos = pos - 1; + while (isalnum (linebuf[lastpos + 1]) || linebuf[lastpos + 1] == '_') + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return 0; + + char *buf = (char *) malloc (lastpos - pos + 2); + memcpy (buf, &linebuf[pos], lastpos - pos + 1); + buf[lastpos - pos + 1] = '\0'; + + pos = lastpos + 1; + return buf; +} + +/* Match an integer and return its value, or MININT on failure. */ +static int +match_integer () +{ + int startpos = pos; + if (linebuf[pos] == '-') + safe_inc_pos (); + + int lastpos = pos - 1; + while (isdigit (linebuf[lastpos + 1])) + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun in match_integer.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return MININT; + + pos = lastpos + 1; + char *buf = (char *) malloc (lastpos - startpos + 2); + memcpy (buf, &linebuf[startpos], lastpos - startpos + 1); + buf[lastpos - startpos + 1] = '\0'; + + int x; + sscanf (buf, "%d", &x); + return x; +} + +static char * +match_to_right_bracket () +{ + int lastpos = pos - 1; + while (linebuf[lastpos + 1] != ']') + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return 0; + + char *buf = (char *) malloc (lastpos - pos + 2); + memcpy (buf, &linebuf[pos], lastpos - pos + 1); + buf[lastpos - pos + 1] = '\0'; + + pos = lastpos + 1; + return buf; +} +