1 | /*- |
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2 | * Copyright (c) 1993, 1994 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * Copyright (c) 1993, 1994, 1995, 1996 |
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5 | * Keith Bostic. All rights reserved. |
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6 | * |
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7 | * See the LICENSE file for redistribution information. |
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8 | * |
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9 | * @(#)mem.h 10.7 (Berkeley) 3/30/96 |
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10 | */ |
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11 | |
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12 | /* Increase the size of a malloc'd buffer. Two versions, one that |
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13 | * returns, one that jumps to an error label. |
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14 | */ |
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15 | #define BINC_GOTO(sp, lp, llen, nlen) { \ |
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16 | void *L__bincp; \ |
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17 | if ((nlen) > llen) { \ |
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18 | if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \ |
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19 | goto alloc_err; \ |
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20 | /* \ |
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21 | * !!! \ |
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22 | * Possible pointer conversion. \ |
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23 | */ \ |
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24 | lp = L__bincp; \ |
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25 | } \ |
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26 | } |
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27 | #define BINC_RET(sp, lp, llen, nlen) { \ |
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28 | void *L__bincp; \ |
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29 | if ((nlen) > llen) { \ |
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30 | if ((L__bincp = binc(sp, lp, &(llen), nlen)) == NULL) \ |
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31 | return (1); \ |
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32 | /* \ |
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33 | * !!! \ |
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34 | * Possible pointer conversion. \ |
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35 | */ \ |
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36 | lp = L__bincp; \ |
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37 | } \ |
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38 | } |
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39 | |
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40 | /* |
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41 | * Get some temporary space, preferably from the global temporary buffer, |
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42 | * from a malloc'd buffer otherwise. Two versions, one that returns, one |
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43 | * that jumps to an error label. |
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44 | */ |
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45 | #define GET_SPACE_GOTO(sp, bp, blen, nlen) { \ |
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46 | GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \ |
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47 | if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \ |
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48 | bp = NULL; \ |
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49 | blen = 0; \ |
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50 | BINC_GOTO(sp, bp, blen, nlen); \ |
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51 | } else { \ |
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52 | BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \ |
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53 | bp = L__gp->tmp_bp; \ |
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54 | blen = L__gp->tmp_blen; \ |
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55 | F_SET(L__gp, G_TMP_INUSE); \ |
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56 | } \ |
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57 | } |
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58 | #define GET_SPACE_RET(sp, bp, blen, nlen) { \ |
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59 | GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \ |
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60 | if (L__gp == NULL || F_ISSET(L__gp, G_TMP_INUSE)) { \ |
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61 | bp = NULL; \ |
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62 | blen = 0; \ |
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63 | BINC_RET(sp, bp, blen, nlen); \ |
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64 | } else { \ |
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65 | BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \ |
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66 | bp = L__gp->tmp_bp; \ |
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67 | blen = L__gp->tmp_blen; \ |
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68 | F_SET(L__gp, G_TMP_INUSE); \ |
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69 | } \ |
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70 | } |
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71 | |
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72 | /* |
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73 | * Add space to a GET_SPACE returned buffer. Two versions, one that |
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74 | * returns, one that jumps to an error label. |
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75 | */ |
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76 | #define ADD_SPACE_GOTO(sp, bp, blen, nlen) { \ |
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77 | GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \ |
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78 | if (L__gp == NULL || bp == L__gp->tmp_bp) { \ |
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79 | F_CLR(L__gp, G_TMP_INUSE); \ |
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80 | BINC_GOTO(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \ |
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81 | bp = L__gp->tmp_bp; \ |
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82 | blen = L__gp->tmp_blen; \ |
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83 | F_SET(L__gp, G_TMP_INUSE); \ |
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84 | } else \ |
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85 | BINC_GOTO(sp, bp, blen, nlen); \ |
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86 | } |
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87 | #define ADD_SPACE_RET(sp, bp, blen, nlen) { \ |
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88 | GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \ |
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89 | if (L__gp == NULL || bp == L__gp->tmp_bp) { \ |
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90 | F_CLR(L__gp, G_TMP_INUSE); \ |
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91 | BINC_RET(sp, L__gp->tmp_bp, L__gp->tmp_blen, nlen); \ |
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92 | bp = L__gp->tmp_bp; \ |
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93 | blen = L__gp->tmp_blen; \ |
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94 | F_SET(L__gp, G_TMP_INUSE); \ |
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95 | } else \ |
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96 | BINC_RET(sp, bp, blen, nlen); \ |
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97 | } |
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98 | |
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99 | /* Free a GET_SPACE returned buffer. */ |
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100 | #define FREE_SPACE(sp, bp, blen) { \ |
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101 | GS *L__gp = (sp) == NULL ? NULL : (sp)->gp; \ |
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102 | if (L__gp != NULL && bp == L__gp->tmp_bp) \ |
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103 | F_CLR(L__gp, G_TMP_INUSE); \ |
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104 | else \ |
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105 | free(bp); \ |
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106 | } |
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107 | |
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108 | /* |
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109 | * Malloc a buffer, casting the return pointer. Various versions. |
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110 | * |
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111 | * !!! |
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112 | * The cast should be unnecessary, malloc(3) and friends return void *'s, |
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113 | * which is all we need. However, some systems that nvi needs to run on |
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114 | * don't do it right yet, resulting in the compiler printing out roughly |
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115 | * a million warnings. After awhile, it seemed easier to put the casts |
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116 | * in instead of explaining it all the time. |
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117 | */ |
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118 | #define CALLOC(sp, p, cast, nmemb, size) { \ |
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119 | if ((p = (cast)calloc(nmemb, size)) == NULL) \ |
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120 | msgq(sp, M_SYSERR, NULL); \ |
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121 | } |
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122 | #define CALLOC_GOTO(sp, p, cast, nmemb, size) { \ |
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123 | if ((p = (cast)calloc(nmemb, size)) == NULL) \ |
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124 | goto alloc_err; \ |
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125 | } |
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126 | #define CALLOC_NOMSG(sp, p, cast, nmemb, size) { \ |
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127 | p = (cast)calloc(nmemb, size); \ |
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128 | } |
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129 | #define CALLOC_RET(sp, p, cast, nmemb, size) { \ |
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130 | if ((p = (cast)calloc(nmemb, size)) == NULL) { \ |
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131 | msgq(sp, M_SYSERR, NULL); \ |
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132 | return (1); \ |
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133 | } \ |
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134 | } |
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135 | |
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136 | #define MALLOC(sp, p, cast, size) { \ |
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137 | if ((p = (cast)malloc(size)) == NULL) \ |
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138 | msgq(sp, M_SYSERR, NULL); \ |
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139 | } |
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140 | #define MALLOC_GOTO(sp, p, cast, size) { \ |
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141 | if ((p = (cast)malloc(size)) == NULL) \ |
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142 | goto alloc_err; \ |
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143 | } |
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144 | #define MALLOC_NOMSG(sp, p, cast, size) { \ |
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145 | p = (cast)malloc(size); \ |
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146 | } |
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147 | #define MALLOC_RET(sp, p, cast, size) { \ |
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148 | if ((p = (cast)malloc(size)) == NULL) { \ |
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149 | msgq(sp, M_SYSERR, NULL); \ |
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150 | return (1); \ |
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151 | } \ |
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152 | } |
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153 | /* |
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154 | * XXX |
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155 | * Don't depend on realloc(NULL, size) working. |
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156 | */ |
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157 | #define REALLOC(sp, p, cast, size) { \ |
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158 | if ((p = (cast)(p == NULL ? \ |
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159 | malloc(size) : realloc(p, size))) == NULL) \ |
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160 | msgq(sp, M_SYSERR, NULL); \ |
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161 | } |
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162 | |
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163 | /* |
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164 | * Versions of memmove(3) and memset(3) that use the size of the |
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165 | * initial pointer to figure out how much memory to manipulate. |
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166 | */ |
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167 | #define MEMMOVE(p, t, len) memmove(p, t, (len) * sizeof(*(p))) |
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168 | #define MEMSET(p, value, len) memset(p, value, (len) * sizeof(*(p))) |
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