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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/config.h>
#include <libpkgconf/stdinc.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)
{
pkgconf_buffer_t readbuf = PKGCONF_BUFFER_INITIALIZER;
size_t lineno = 0;
bool continue_reading = true;
while (continue_reading)
{
char op, *p, *key, *value;
bool warned_key_whitespace = false, warned_value_whitespace = false;
continue_reading = pkgconf_fgetline(&readbuf, f);
lineno++;
p = readbuf.base;
if (p == NULL)
continue;
while (*p && isspace((unsigned char)*p))
p++;
if (*p && p != readbuf.base)
{
warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n",
filename, lineno);
warned_key_whitespace = true;
}
key = p;
while (*p && (isalpha((unsigned char)*p) || isdigit((unsigned char)*p) || *p == '_' || *p == '.'))
p++;
if (!isalpha((unsigned char)*key) &&
!isdigit((unsigned char)*p))
{
pkgconf_buffer_reset(&readbuf);
continue;
}
while (*p && isspace((unsigned char)*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;
if (*p != '\0')
{
*p = '\0';
p++;
}
while (*p && isspace((unsigned char)*p))
p++;
value = p;
p = value + (strlen(value) - 1);
while (*p && isspace((unsigned char) *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);
pkgconf_buffer_reset(&readbuf);
}
pkgconf_buffer_finalize(&readbuf);
}
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