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Tue, 8 Jun 2021 18:27:24 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 45811AE073; Tue, 8 Jun 2021 18:27:24 +0000 (GMT) Received: from localhost (unknown [9.40.194.84]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 8 Jun 2021 18:27:24 +0000 (GMT) To: gcc-patches@gcc.gnu.org Subject: [PATCH 05/55] rs6000: Add helper functions for parsing Date: Tue, 8 Jun 2021 13:26:12 -0500 Message-Id: <9171ddc13330d0f21a016ae86624d9a1373e6bb4.1623163679.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-ORIG-GUID: hFdunLa5Et1T1bB-37tAwruLFZxKviyR X-Proofpoint-GUID: hFdunLa5Et1T1bB-37tAwruLFZxKviyR X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-06-08_14:2021-06-04, 2021-06-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 bulkscore=0 clxscore=1015 impostorscore=0 mlxlogscore=999 lowpriorityscore=0 phishscore=0 priorityscore=1501 mlxscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106080117 X-Spam-Status: No, score=-11.4 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, 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: segher@kernel.crashing.org Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" 2021-06-07 Bill Schmidt gcc/ * config/rs6000/rs6000-gen-builtins.c (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 | 111 ++++++++++++++++++++++++ 1 file changed, 111 insertions(+) diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c index f4ab0978f2c..f35893748d2 100644 --- a/gcc/config/rs6000/rs6000-gen-builtins.c +++ b/gcc/config/rs6000/rs6000-gen-builtins.c @@ -210,3 +210,114 @@ ovld_diag (const char * fmt, ...) vfprintf (stderr, fmt, args); va_end (args); } + +/* Pass over unprintable characters and whitespace (other than a newline, + which terminates the scan). */ +static void +consume_whitespace (void) +{ + 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++; + size_t len = strlen (linebuf); + if (linebuf[len - 1] != '\n') + (*diag) ("line doesn't terminate with newline\n"); + pos = 0; + consume_whitespace (); + if (linebuf[pos] != '\n' && linebuf[pos] != ';') + return 1; + } +} + +static inline void +safe_inc_pos (void) +{ + if (pos++ >= LINELEN) + { + (*diag) ("line length overrun.\n"); + exit (1); + } +} + +/* Match an identifier, returning NULL on failure, else a pointer to a + buffer containing the identifier. */ +static char * +match_identifier (void) +{ + int lastpos = pos - 1; + while (isalnum (linebuf[lastpos + 1]) || linebuf[lastpos + 1] == '_') + ++lastpos; + + 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 the string representing its value, + or a null string on failure. */ +static char * +match_integer (void) +{ + int startpos = pos; + if (linebuf[pos] == '-') + safe_inc_pos (); + + int lastpos = pos - 1; + while (isdigit (linebuf[lastpos + 1])) + ++lastpos; + + if (lastpos < pos) + return NULL; + + pos = lastpos + 1; + char *buf = (char *) malloc (lastpos - startpos + 2); + memcpy (buf, &linebuf[startpos], lastpos - startpos + 1); + buf[lastpos - startpos + 1] = '\0'; + return buf; +} + +/* Match a string up to but not including a ']', and return its value, + or zero if there is nothing before the ']'. Error if we don't find + such a character. */ +static const char * +match_to_right_bracket (void) +{ + int lastpos = pos - 1; + while (linebuf[lastpos + 1] != ']') + { + if (linebuf[lastpos + 1] == '\n') + { + (*diag) ("no ']' found before end of line.\n"); + exit (1); + } + ++lastpos; + } + + 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; +}