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-rw-r--r--libpkgconf/parser.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/libpkgconf/parser.c b/libpkgconf/parser.c
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+++ b/libpkgconf/parser.c
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+/*
+ * parser.c
+ * rfc822 message parser
+ *
+ * Copyright (c) 2018 pkgconf authors (see AUTHORS).
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * This software is provided 'as is' and without any warranty, express or
+ * implied. In no event shall the authors be liable for any damages arising
+ * from the use of this software.
+ */
+
+#include <libpkgconf/stdinc.h>
+#include <libpkgconf/config.h>
+#include <libpkgconf/libpkgconf.h>
+
+/*
+ * !doc
+ *
+ * .. c:function:: pkgconf_pkg_t *pkgconf_pkg_new_from_file(const pkgconf_client_t *client, const char *filename, FILE *f)
+ *
+ * Parse a .pc file into a pkgconf_pkg_t object structure.
+ *
+ * :param pkgconf_client_t* client: The pkgconf client object to use for dependency resolution.
+ * :param char* filename: The filename of the package file (including full path).
+ * :param FILE* f: The file object to read from.
+ * :returns: A ``pkgconf_pkg_t`` object which contains the package data.
+ * :rtype: pkgconf_pkg_t *
+ */
+void
+pkgconf_parser_parse(FILE *f, void *data, const pkgconf_parser_operand_func_t *ops, const pkgconf_parser_warn_func_t warnfunc, const char *filename)
+{
+ char readbuf[PKGCONF_BUFSIZE];
+ size_t lineno = 0;
+
+ while (pkgconf_fgetline(readbuf, PKGCONF_BUFSIZE, f) != NULL)
+ {
+ char op, *p, *key, *value;
+ bool warned_key_whitespace = false, warned_value_whitespace = false;
+
+ lineno++;
+
+ p = readbuf;
+ while (*p && (isalpha((unsigned int)*p) || isdigit((unsigned int)*p) || *p == '_' || *p == '.'))
+ p++;
+
+ key = readbuf;
+ if (!isalpha((unsigned int)*key) && !isdigit((unsigned int)*p))
+ continue;
+
+ while (*p && isspace((unsigned int)*p))
+ {
+ if (!warned_key_whitespace)
+ {
+ warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n",
+ filename, lineno);
+ warned_key_whitespace = true;
+ }
+
+ /* set to null to avoid trailing spaces in key */
+ *p = '\0';
+ p++;
+ }
+
+ op = *p;
+ *p = '\0';
+ p++;
+
+ while (*p && isspace((unsigned int)*p))
+ p++;
+
+ value = p;
+ p = value + (strlen(value) - 1);
+ while (*p && isspace((unsigned int) *p) && p > value)
+ {
+ if (!warned_value_whitespace && op == '=')
+ {
+ warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: trailing whitespace encountered while parsing value section\n",
+ filename, lineno);
+ warned_value_whitespace = true;
+ }
+
+ *p = '\0';
+ p--;
+ }
+
+ if (ops[(unsigned char) op])
+ ops[(unsigned char) op](data, lineno, key, value);
+ }
+
+ fclose(f);
+}