1 /* 2 * parser.c 3 * rfc822 message parser 4 * 5 * Copyright (c) 2018 pkgconf authors (see AUTHORS). 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * This software is provided 'as is' and without any warranty, express or 12 * implied. In no event shall the authors be liable for any damages arising 13 * from the use of this software. 14 */ 15 16 #include <libpkgconf/config.h> 17 #include <libpkgconf/stdinc.h> 18 #include <libpkgconf/libpkgconf.h> 19 20 /* 21 * !doc 22 * 23 * .. c:function:: pkgconf_pkg_t *pkgconf_pkg_new_from_file(const pkgconf_client_t *client, const char *filename, FILE *f) 24 * 25 * Parse a .pc file into a pkgconf_pkg_t object structure. 26 * 27 * :param pkgconf_client_t* client: The pkgconf client object to use for dependency resolution. 28 * :param char* filename: The filename of the package file (including full path). 29 * :param FILE* f: The file object to read from. 30 * :returns: A ``pkgconf_pkg_t`` object which contains the package data. 31 * :rtype: pkgconf_pkg_t * 32 */ 33 void 34 pkgconf_parser_parse(FILE *f, void *data, const pkgconf_parser_operand_func_t *ops, const pkgconf_parser_warn_func_t warnfunc, const char *filename) 35 { 36 pkgconf_buffer_t readbuf = PKGCONF_BUFFER_INITIALIZER; 37 size_t lineno = 0; 38 bool continue_reading = true; 39 40 while (continue_reading) 41 { 42 char op, *p, *key, *value; 43 bool warned_key_whitespace = false, warned_value_whitespace = false; 44 45 continue_reading = pkgconf_fgetline(&readbuf, f); 46 lineno++; 47 48 p = readbuf.base; 49 if (p == NULL) 50 continue; 51 while (*p && isspace((unsigned char)*p)) 52 p++; 53 if (*p && p != readbuf.base) 54 { 55 warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n", 56 filename, lineno); 57 warned_key_whitespace = true; 58 } 59 key = p; 60 while (*p && (isalpha((unsigned char)*p) || isdigit((unsigned char)*p) || *p == '_' || *p == '.')) 61 p++; 62 63 if (!isalpha((unsigned char)*key) && 64 !isdigit((unsigned char)*p)) 65 { 66 pkgconf_buffer_reset(&readbuf); 67 continue; 68 } 69 70 while (*p && isspace((unsigned char)*p)) 71 { 72 if (!warned_key_whitespace) 73 { 74 warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: whitespace encountered while parsing key section\n", 75 filename, lineno); 76 warned_key_whitespace = true; 77 } 78 79 /* set to null to avoid trailing spaces in key */ 80 *p = '\0'; 81 p++; 82 } 83 84 op = *p; 85 if (*p != '\0') 86 { 87 *p = '\0'; 88 p++; 89 } 90 91 while (*p && isspace((unsigned char)*p)) 92 p++; 93 94 value = p; 95 p = value + (strlen(value) - 1); 96 while (*p && isspace((unsigned char) *p) && p > value) 97 { 98 if (!warned_value_whitespace && op == '=') 99 { 100 warnfunc(data, "%s:" SIZE_FMT_SPECIFIER ": warning: trailing whitespace encountered while parsing value section\n", 101 filename, lineno); 102 warned_value_whitespace = true; 103 } 104 105 *p = '\0'; 106 p--; 107 } 108 if (ops[(unsigned char) op]) 109 ops[(unsigned char) op](data, lineno, key, value); 110 111 pkgconf_buffer_reset(&readbuf); 112 } 113 114 pkgconf_buffer_finalize(&readbuf); 115 } 116